VTEC Event 2025-O-NEW-KRIW-WS-W-0009

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2025 [KRIW] RIVERTON Winter Storm (WS) Warning (W) Number 9

Listing of Counties/Parishes/Zones Included in Product

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UGC	Name	Status	Issuance	Issue	Initial Expire	Expire
WYZ001	Yellowstone National Park	EXP	2025-03-17T08:54:00Z	2025-03-17T12:00:00Z	2025-03-19T00:00:00Z	2025-03-19T00:00:00Z
WYZ002	Absaroka Mountains	EXP	2025-03-17T08:54:00Z	2025-03-17T12:00:00Z	2025-03-19T00:00:00Z	2025-03-19T00:00:00Z
WYZ008	Bighorn Mountains West	EXP	2025-03-17T08:54:00Z	2025-03-18T00:00:00Z	2025-03-19T05:00:00Z	2025-03-19T05:00:00Z
WYZ009	Bighorn Mountains Southeast	EXP	2025-03-17T08:54:00Z	2025-03-18T00:00:00Z	2025-03-19T05:00:00Z	2025-03-19T05:00:00Z
WYZ010	Northeast Johnson County	EXP	2025-03-17T08:54:00Z	2025-03-18T05:00:00Z	2025-03-19T05:00:00Z	2025-03-19T05:00:00Z
WYZ012	Teton and Gros Ventre Mountains	EXP	2025-03-17T08:54:00Z	2025-03-17T12:00:00Z	2025-03-19T00:00:00Z	2025-03-19T00:00:00Z
WYZ015	Wind River Mountains East	CAN	2025-03-17T08:54:00Z	2025-03-18T09:00:00Z	2025-03-19T00:00:00Z	2025-03-18T08:02:00Z
WYZ018	Lander Foothills	CAN	2025-03-17T08:54:00Z	2025-03-18T09:00:00Z	2025-03-19T00:00:00Z	2025-03-18T08:02:00Z

Showing 1 to 8 of 8 entries

RADAR Composite at Issuance Time

Storm Based Warning History

660 
WWUS45 KRIW 170854
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
254 AM MDT Mon Mar 17 2025

WYZ001-002-012-172300-
/O.NEW.KRIW.WS.W.0009.250317T1200Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Mammoth, and Lake
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 6 AM THIS MORNING TO 6 PM MDT 
TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 18 
  and 24 inches; amounts will range between 4 and 8 inches across 
  the northern half of Yellowstone. Winds gusting as high as 55 mph 
  over the higher elevations through much of the morning and 
  subsiding by this evening.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...From 6 AM this morning to 6 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-172300-
/O.NEW.KRIW.WS.W.0009.250318T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 11 PM 
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph this evening and 
  quickly decreasing.

* WHERE...Bighorn Mountains.

* WHEN...From 6 PM this evening to 11 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-172300-
/O.NEW.KRIW.WS.W.0009.250318T0500Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 PM 
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...From 11 PM this evening to 11 PM MDT Tuesday. 

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...The heaviest snow will occur late tonight and 
  through Tuesday morning, especially in the Buffalo area. Snowfall 
  rates up to 2"/hr will be possible during this time

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-172300-
/O.NEW.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 5 and 
  8 inches near Lander; 12 to 24 inches along the east slopes of the 
  Wind River Mountains.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

* ADDITIONAL DETAILS...The heaviest snow will occur Tuesday morning, 
  with light snow lingering through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Meeteetse, Clark, Lovell, Basin, Cody,
Shell, Powell, and Greybull
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 8 
  inches, lesser amounts of 1 to 2 inches will occur from Lovell to 
  Basin. Winds gusting as high as 40 mph by sunrise Tuesday morning 
  and continuing through the day.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...From 6 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Jackson, Star Valley Ranch, Alpine,
Pinedale, Thayne, and Afton
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches in the Jackson/Star Valleys; 2 to 4 inches in Pinedale and 
  Bondurant. Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...From 6 PM this evening to noon MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Winds will increase near Pinedale early 
  Tuesday morning, increasing in the Jackson/Star Valleys late in 
  the morning into the early afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches, with locally higher amounts up to 18 inches in the higher 
  elevations. Winds gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...From 6 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005>007-011-016-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0500Z-250319T0000Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-Owl Creek and
Bridger Mountains-Southeast Johnson County-Upper Wind River Basin-
Including the cities of Worland, Kaycee, Dubois, Thermopolis, and
Ten Sleep
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches, with Worland occurring on the lower end of this range; 6 
  to 12 inches in the higher elevations. Winds gusting as high as 45 
  mph.

* WHERE...Owl Creek and Bridger Mountains, Southwest Bighorn Basin, 
  Upper Wind River Basin, Southeast Bighorn Basin, and Southeast 
  Johnson County.

* WHEN...From 11 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult, especially through the Wind 
  River Canyon. The hazardous conditions could impact the Tuesday 
  morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches; lower amounts near 2 inches expected in the Casper area. 
  Winds gusting as high as 45 mph.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 11 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches on Casper Mountain; amounts around 6 inches near Jeffrey 
  City and up to 12 inches near Beaver Rim. Winds gusting as high as 
  35 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...From 3 AM to 11 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-172300-
/O.NEW.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Wamsutter, Rock Springs, and Green River
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TUESDAY TO 6 AM MDT 
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM Tuesday to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

577 
WWUS45 KRIW 172320
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
520 PM MDT Mon Mar 17 2025

WYZ001-002-012-181400-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Lake, and Mammoth
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 18 
  and 24 inches; amounts will range between 4 and 8 inches across 
  the northern half of Yellowstone. Winds gusting as high as 55 mph 
  over the higher elevations through much of the morning and 
  subsiding by this evening.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-181400-
/O.CON.KRIW.WS.W.0009.250318T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph this evening and 
  quickly decreasing.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-181400-
/O.CON.KRIW.WS.W.0009.250318T0500Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 
11 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...From 11 PM this evening to 11 PM MDT Tuesday. 

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...The heaviest snow will occur late tonight and 
  through Tuesday morning, especially in the Buffalo area. Snowfall 
  rates up to 2"/hr will be possible during this time

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-181400-
/O.CON.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT 
TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 5 and 
  8 inches near Lander; 12 to 24 inches along the east slopes of the 
  Wind River Mountains.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes. Gusty winds 
  could bring down tree branches.

* ADDITIONAL DETAILS...The heaviest snow will occur Tuesday morning, 
  with light snow lingering through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Shell, Powell, Clark, Basin, Cody,
Meeteetse, Greybull, and Lovell
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 8 
  inches, lesser amounts of 1 to 2 inches will occur from Lovell to 
  Basin. Winds gusting as high as 40 mph by sunrise Tuesday morning 
  and continuing through the day.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. Widespread blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday morning and evening commutes. Strong winds 
  could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Pinedale, Thayne, Alpine, Star Valley
Ranch, Afton, and Jackson
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches in the Jackson/Star Valleys; 2 to 4 inches in Pinedale and 
  Bondurant. Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...Until noon MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Winds will increase near Pinedale early 
  Tuesday morning, increasing in the Jackson/Star Valleys late in 
  the morning into the early afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches, with locally higher amounts up to 18 inches in the higher 
  elevations. Winds gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005>007-011-016-181400-
/O.CON.KRIW.WW.Y.0016.250318T0500Z-250319T0000Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-Owl Creek and
Bridger Mountains-Southeast Johnson County-Upper Wind River Basin-
Including the cities of Thermopolis, Ten Sleep, Dubois, Worland,
and Kaycee
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING 
TO 6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches, with Worland occurring on the lower end of this range; 6 
  to 12 inches in the higher elevations. Winds gusting as high as 45 
  mph.

* WHERE...Owl Creek and Bridger Mountains, Southwest Bighorn Basin, 
  Upper Wind River Basin, Southeast Bighorn Basin, and Southeast 
  Johnson County.

* WHEN...From 11 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult, especially through the Wind 
  River Canyon. The hazardous conditions could impact the Tuesday 
  morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-181400-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches; lower amounts near 2 inches expected in the Casper area. 
  Winds gusting as high as 45 mph.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-181400-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches on Casper Mountain; amounts around 6 inches near Jeffrey 
  City and up to 12 inches near Beaver Rim. Winds gusting as high as 
  35 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...From 3 AM to 11 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-181400-
/O.CON.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Wamsutter, and Green River
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TUESDAY TO 6 
AM MDT WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM Tuesday to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

091 
WWUS45 KRIW 180802
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
202 AM MDT Tue Mar 18 2025

WYZ015-018-182315-
/O.CAN.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
/O.EXA.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Snow expected. Total snow accumulations between 2 and 4 
  inches in the Lander Foothills; 6 to 12 inches along the east 
  slopes of the Wind River Mountains. Winds gusting as high as 40 
  mph in the afternoon.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ001-002-012-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations 4 to 8 inches; 1 to 2 
  inches across Yellowstone NP. Winds gusting as high as 40 mph  
  through much of the morning and decreasing through the afternoon.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...Snowfall rates up to 2"/hr and near-blizzard 
  conditions will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-181800-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Powell, Basin, Clark, Cody, Greybull,
Shell, Meeteetse, and Lovell
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches. Winds 
  gusting as high as 55 mph.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Most of the impacts from the snow will end by 
  midday. However, winds will continue to gust through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005-006-181800-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-
Including the cities of Thermopolis, Ten Sleep, and Worland
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches. 
  Winds gusting as high as 55 mph.

* WHERE...Southwest Bighorn Basin and Southeast Bighorn Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Most of the impacts from the snow will end by 
  midday. However, winds will continue to gust through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-181800-
/O.EXT.KRIW.WW.Y.0016.250318T0900Z-250318T1800Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow expected. Total snow accumulations up to 3 inches. 
  Winds gusts around 40 mph will be common. Gusts as high as 65 mph 
  will occur off the Owl Creek Mountains, impacting the Wind River 
  Canyon and Boysen Reservoir.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ007-011-016-182315-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Southeast Johnson County-Upper
Wind River Basin-
Including the cities of Dubois and Kaycee
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations between 2 to 4 inches; 
  5 to 10 inches in the Owl Creek/Bridger Mountains, with locally 
  higher amounts up to 14 inches. Winds gusting as high as 40 mph, 
  with gusts up to 55 mph over the Owl Creek/Bridger Mountains.

* WHERE...Owl Creek and Bridger Mountains, Upper Wind River Basin, 
  and Southeast Johnson County.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-181800-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Afton, Jackson, Star Valley Ranch,
Alpine, Pinedale, and Thayne
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations between 1 and 3 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-182315-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 6 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-182315-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow expected. Total snow accumulations up to 3 inches near 
  Jeffrey City and Alcova Reservoir; 5 to 10 inches near Beaver Rim 
  and over Casper Mountain. Winds gusting as high as 40 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-182315-
/O.CON.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING 
TO 6 AM MDT WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM this morning to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

413 
WWUS45 KRIW 181810
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1210 PM MDT Tue Mar 18 2025

WYZ020-190000-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
/O.NEW.KRIW.WW.Y.0017.250318T1810Z-250319T0000Z/
Natrona County Lower Elevations-
Including the cities of Casper
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...


* WHAT...Snow. Additional snow accumulations up to 3 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute along 
  Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003>006-013-017-023-025-181915-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin-
Southeast Bighorn Basin-Jackson Hole-Wind River Basin-Star Valley-
Upper Green River Basin Foothills-
Including the cities of Afton, Worland, Lovell, Thayne, Riverton,
Jackson, Greybull, Star Valley Ranch, Cody, Shell, Shoshoni,
Meeteetse, Powell, Ten Sleep, Clark, Pinedale, Basin,
Thermopolis, and Alpine
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY HAS EXPIRED...

Light snow could persist for a few more hours; however, the primary 
threat has ended.

$$

WYZ001-002-012-190000-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Mammoth, and Lake
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 3 inches.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 13 inches. 
  Winds gusting as high as 45 mph.

* WHERE...Bighorn Mountains Southeast and Bighorn Mountains West.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Powder River/Granite 
  Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 7 
  inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. Areas of blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday evening commute along Interstates 90 and 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ007-011-016-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Southeast Johnson County-Upper
Wind River Basin-
Including the cities of Kaycee and Dubois
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 5 inches. Winds 
  gusting as high as 60 mph.

* WHERE...Owl Creek and Bridger Mountains, Upper Wind River Basin, 
  and Southeast Johnson County.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 4 inches. Winds 
  gusting as high as 35 mph.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations between 1 and 9 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Salt River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-191200-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Green River, Rock Springs, and Wamsutter
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to 6 inches. Winds 
  gusting as high as 50 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute along Interstate 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Gerhardt

366 
WWUS45 KRIW 182348
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
548 PM MDT Tue Mar 18 2025

WYZ001-002-012-190100-
/O.EXP.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Lake, and Mammoth
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING...

Snow has tapered off and main threat has ended. 

$$

WYZ007-016-018-024-190100-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Upper Wind River Basin-Lander
Foothills-Salt River and Wyoming Ranges-
Including the cities of Dubois and Lander
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING...

Snow has tapered off and main threat has ended. 

$$

WYZ008-009-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 5 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Powder River/Granite 
  Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations between 1 and 3 
  inches. Winds gusting as high as 50 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. Areas of blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday evening commute along Interstates 90 and 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ011-190500-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Southeast Johnson County-
Including the cities of Kaycee
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...Southeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-190500-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Wind River Mountains East-
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 4 inches. Winds 
  gusting as high as 50 mph.

* WHERE...Wind River Mountains East.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ020-190500-
/O.EXT.KRIW.WW.Y.0017.000000T0000Z-250319T0500Z/
Natrona County Lower Elevations-
Including the cities of Casper
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 35 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute along 
  Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 5 inches. Winds 
  gusting as high as 50 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to 2 to 4 inches. 
  Winds gusting as high as 40 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute. Gusty winds 
  could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Lowe

285 
WWUS45 KRIW 190434
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1034 PM MDT Tue Mar 18 2025

WYZ008>010-190545-
/O.EXP.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-Northeast
Johnson County-
Including the cities of Buffalo
1034 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ011-015-019-022-190545-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Southeast Johnson County-Wind River Mountains East-Green
Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City and Kaycee
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ020-190545-
/O.EXP.KRIW.WW.Y.0017.000000T0000Z-250319T0500Z/
Natrona County Lower Elevations-
Including the cities of Casper
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ028>030-191200-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute along Interstate 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Lowe

Permalink to 202503170854-KRIW-WWUS45-WSWRIW

660 
WWUS45 KRIW 170854
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
254 AM MDT Mon Mar 17 2025

WYZ001-002-012-172300-
/O.NEW.KRIW.WS.W.0009.250317T1200Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Mammoth, and Lake
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 6 AM THIS MORNING TO 6 PM MDT 
TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 18 
  and 24 inches; amounts will range between 4 and 8 inches across 
  the northern half of Yellowstone. Winds gusting as high as 55 mph 
  over the higher elevations through much of the morning and 
  subsiding by this evening.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...From 6 AM this morning to 6 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-172300-
/O.NEW.KRIW.WS.W.0009.250318T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 11 PM 
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph this evening and 
  quickly decreasing.

* WHERE...Bighorn Mountains.

* WHEN...From 6 PM this evening to 11 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-172300-
/O.NEW.KRIW.WS.W.0009.250318T0500Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 PM 
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...From 11 PM this evening to 11 PM MDT Tuesday. 

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...The heaviest snow will occur late tonight and 
  through Tuesday morning, especially in the Buffalo area. Snowfall 
  rates up to 2"/hr will be possible during this time

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-172300-
/O.NEW.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
254 AM MDT Mon Mar 17 2025

...WINTER STORM WARNING IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 5 and 
  8 inches near Lander; 12 to 24 inches along the east slopes of the 
  Wind River Mountains.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

* ADDITIONAL DETAILS...The heaviest snow will occur Tuesday morning, 
  with light snow lingering through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Meeteetse, Clark, Lovell, Basin, Cody,
Shell, Powell, and Greybull
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 8 
  inches, lesser amounts of 1 to 2 inches will occur from Lovell to 
  Basin. Winds gusting as high as 40 mph by sunrise Tuesday morning 
  and continuing through the day.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...From 6 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Jackson, Star Valley Ranch, Alpine,
Pinedale, Thayne, and Afton
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO NOON 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches in the Jackson/Star Valleys; 2 to 4 inches in Pinedale and 
  Bondurant. Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...From 6 PM this evening to noon MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Winds will increase near Pinedale early 
  Tuesday morning, increasing in the Jackson/Star Valleys late in 
  the morning into the early afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches, with locally higher amounts up to 18 inches in the higher 
  elevations. Winds gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...From 6 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005>007-011-016-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0500Z-250319T0000Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-Owl Creek and
Bridger Mountains-Southeast Johnson County-Upper Wind River Basin-
Including the cities of Worland, Kaycee, Dubois, Thermopolis, and
Ten Sleep
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 6 PM 
MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches, with Worland occurring on the lower end of this range; 6 
  to 12 inches in the higher elevations. Winds gusting as high as 45 
  mph.

* WHERE...Owl Creek and Bridger Mountains, Southwest Bighorn Basin, 
  Upper Wind River Basin, Southeast Bighorn Basin, and Southeast 
  Johnson County.

* WHEN...From 11 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult, especially through the Wind 
  River Canyon. The hazardous conditions could impact the Tuesday 
  morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches; lower amounts near 2 inches expected in the Casper area. 
  Winds gusting as high as 45 mph.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-172300-
/O.NEW.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 11 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches on Casper Mountain; amounts around 6 inches near Jeffrey 
  City and up to 12 inches near Beaver Rim. Winds gusting as high as 
  35 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...From 3 AM to 11 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-172300-
/O.NEW.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Wamsutter, Rock Springs, and Green River
254 AM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 AM TUESDAY TO 6 AM MDT 
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM Tuesday to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

Permalink to 202503172320-KRIW-WWUS45-WSWRIW

577 
WWUS45 KRIW 172320
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
520 PM MDT Mon Mar 17 2025

WYZ001-002-012-181400-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Lake, and Mammoth
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 18 
  and 24 inches; amounts will range between 4 and 8 inches across 
  the northern half of Yellowstone. Winds gusting as high as 55 mph 
  over the higher elevations through much of the morning and 
  subsiding by this evening.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-181400-
/O.CON.KRIW.WS.W.0009.250318T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph this evening and 
  quickly decreasing.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT Tuesday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-181400-
/O.CON.KRIW.WS.W.0009.250318T0500Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 
11 PM MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...From 11 PM this evening to 11 PM MDT Tuesday. 

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...The heaviest snow will occur late tonight and 
  through Tuesday morning, especially in the Buffalo area. Snowfall 
  rates up to 2"/hr will be possible during this time

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-181400-
/O.CON.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
520 PM MDT Mon Mar 17 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT 
TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 5 and 
  8 inches near Lander; 12 to 24 inches along the east slopes of the 
  Wind River Mountains.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes. Gusty winds 
  could bring down tree branches.

* ADDITIONAL DETAILS...The heaviest snow will occur Tuesday morning, 
  with light snow lingering through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Shell, Powell, Clark, Basin, Cody,
Meeteetse, Greybull, and Lovell
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 8 
  inches, lesser amounts of 1 to 2 inches will occur from Lovell to 
  Basin. Winds gusting as high as 40 mph by sunrise Tuesday morning 
  and continuing through the day.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. Widespread blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday morning and evening commutes. Strong winds 
  could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Pinedale, Thayne, Alpine, Star Valley
Ranch, Afton, and Jackson
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches in the Jackson/Star Valleys; 2 to 4 inches in Pinedale and 
  Bondurant. Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...Until noon MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Winds will increase near Pinedale early 
  Tuesday morning, increasing in the Jackson/Star Valleys late in 
  the morning into the early afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-181400-
/O.CON.KRIW.WW.Y.0016.250318T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches, with locally higher amounts up to 18 inches in the higher 
  elevations. Winds gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005>007-011-016-181400-
/O.CON.KRIW.WW.Y.0016.250318T0500Z-250319T0000Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-Owl Creek and
Bridger Mountains-Southeast Johnson County-Upper Wind River Basin-
Including the cities of Thermopolis, Ten Sleep, Dubois, Worland,
and Kaycee
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING 
TO 6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches, with Worland occurring on the lower end of this range; 6 
  to 12 inches in the higher elevations. Winds gusting as high as 45 
  mph.

* WHERE...Owl Creek and Bridger Mountains, Southwest Bighorn Basin, 
  Upper Wind River Basin, Southeast Bighorn Basin, and Southeast 
  Johnson County.

* WHEN...From 11 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Travel could be difficult, especially through the Wind 
  River Canyon. The hazardous conditions could impact the Tuesday 
  morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-181400-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 6 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches; lower amounts near 2 inches expected in the Casper area. 
  Winds gusting as high as 45 mph.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...From 3 AM to 6 PM MDT Tuesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-181400-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM TO 11 PM MDT 
TUESDAY...

* WHAT...Snow expected. Total snow accumulations between 6 and 12 
  inches on Casper Mountain; amounts around 6 inches near Jeffrey 
  City and up to 12 inches near Beaver Rim. Winds gusting as high as 
  35 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...From 3 AM to 11 PM MDT Tuesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes. Strong 
  winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-181400-
/O.CON.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Wamsutter, and Green River
520 PM MDT Mon Mar 17 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TUESDAY TO 6 
AM MDT WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM Tuesday to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

Permalink to 202503180802-KRIW-WWUS45-WSWRIW

091 
WWUS45 KRIW 180802
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
202 AM MDT Tue Mar 18 2025

WYZ015-018-182315-
/O.CAN.KRIW.WS.W.0009.250318T0900Z-250319T0000Z/
/O.EXA.KRIW.WW.Y.0016.250318T0900Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Snow expected. Total snow accumulations between 2 and 4 
  inches in the Lander Foothills; 6 to 12 inches along the east 
  slopes of the Wind River Mountains. Winds gusting as high as 40 
  mph in the afternoon.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ001-002-012-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations 4 to 8 inches; 1 to 2 
  inches across Yellowstone NP. Winds gusting as high as 40 mph  
  through much of the morning and decreasing through the afternoon.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning and evening commutes over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations between 12 
  and 24 inches over the northern end of the mountains and 12 to 15  
  inches over the far southern end. Amounts of 4 to 8 inches 
  elsewhere. Winds gusting as high as 45 mph.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Powder 
  River/Granite Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-182315-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
202 AM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 
  12 inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstates 90 and 25.

* ADDITIONAL DETAILS...Snowfall rates up to 2"/hr and near-blizzard 
  conditions will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003-004-181800-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Cody Foothills-North Bighorn Basin-
Including the cities of Powell, Basin, Clark, Cody, Greybull,
Shell, Meeteetse, and Lovell
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches. Winds 
  gusting as high as 55 mph.

* WHERE...Cody Foothills and North Bighorn Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Most of the impacts from the snow will end by 
  midday. However, winds will continue to gust through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ005-006-181800-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Southwest Bighorn Basin-Southeast Bighorn Basin-
Including the cities of Thermopolis, Ten Sleep, and Worland
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations between 2 and 4 inches. 
  Winds gusting as high as 55 mph.

* WHERE...Southwest Bighorn Basin and Southeast Bighorn Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

* ADDITIONAL DETAILS...Most of the impacts from the snow will end by 
  midday. However, winds will continue to gust through the afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ017-020-181800-
/O.EXT.KRIW.WW.Y.0016.250318T0900Z-250318T1800Z/
Wind River Basin-Natrona County Lower Elevations-
Including the cities of Riverton, Casper, and Shoshoni
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow expected. Total snow accumulations up to 3 inches. 
  Winds gusts around 40 mph will be common. Gusts as high as 65 mph 
  will occur off the Owl Creek Mountains, impacting the Wind River 
  Canyon and Boysen Reservoir.

* WHERE...Natrona County Lower Elevations and Wind River Basin.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ007-011-016-182315-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Southeast Johnson County-Upper
Wind River Basin-
Including the cities of Dubois and Kaycee
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations between 2 to 4 inches; 
  5 to 10 inches in the Owl Creek/Bridger Mountains, with locally 
  higher amounts up to 14 inches. Winds gusting as high as 40 mph, 
  with gusts up to 55 mph over the Owl Creek/Bridger Mountains.

* WHERE...Owl Creek and Bridger Mountains, Upper Wind River Basin, 
  and Southeast Johnson County.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ013-023-025-181800-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Jackson Hole-Star Valley-Upper Green River Basin Foothills-
Including the cities of Afton, Jackson, Star Valley Ranch,
Alpine, Pinedale, and Thayne
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY...

* WHAT...Snow. Additional snow accumulations between 1 and 3 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Jackson Hole, Star Valley, and Upper Green River Basin 
  Foothills.

* WHEN...Until noon MDT today.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-182315-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 6 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes over Salt 
  River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-182315-
/O.CON.KRIW.WW.Y.0016.250318T0900Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow expected. Total snow accumulations up to 3 inches near 
  Jeffrey City and Alcova Reservoir; 5 to 10 inches near Beaver Rim 
  and over Casper Mountain. Winds gusting as high as 40 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-182315-
/O.CON.KRIW.WW.Y.0016.250318T1200Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
202 AM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING 
TO 6 AM MDT WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 6 
  inches. Winds gusting as high as 45 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...From 6 AM this morning to 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday morning and evening commutes along 
  Interstate 80.

* ADDITIONAL DETAILS...Bursts of heavier snow are likely Tuesday 
  afternoon over the eastern end of Sweetwater County, from Point of 
  Rocks eastward.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

TL

Permalink to 202503181810-KRIW-WWUS45-WSWRIW

413 
WWUS45 KRIW 181810
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1210 PM MDT Tue Mar 18 2025

WYZ020-190000-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
/O.NEW.KRIW.WW.Y.0017.250318T1810Z-250319T0000Z/
Natrona County Lower Elevations-
Including the cities of Casper
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...


* WHAT...Snow. Additional snow accumulations up to 3 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute along 
  Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ003>006-013-017-023-025-181915-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250318T1800Z/
Cody Foothills-North Bighorn Basin-Southwest Bighorn Basin-
Southeast Bighorn Basin-Jackson Hole-Wind River Basin-Star Valley-
Upper Green River Basin Foothills-
Including the cities of Afton, Worland, Lovell, Thayne, Riverton,
Jackson, Greybull, Star Valley Ranch, Cody, Shell, Shoshoni,
Meeteetse, Powell, Ten Sleep, Clark, Pinedale, Basin,
Thermopolis, and Alpine
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY HAS EXPIRED...

Light snow could persist for a few more hours; however, the primary 
threat has ended.

$$

WYZ001-002-012-190000-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Mammoth, and Lake
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 3 inches.

* WHERE...Absaroka Mountains, Teton and Gros Ventre Mountains, and 
  Yellowstone National Park.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute over 
  Teton/Togwotee Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ008-009-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 13 inches. 
  Winds gusting as high as 45 mph.

* WHERE...Bighorn Mountains Southeast and Bighorn Mountains West.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Powder River/Granite 
  Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
1210 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations between 4 and 7 
  inches. Winds gusting as high as 40 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. Areas of blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday evening commute along Interstates 90 and 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ007-011-016-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Southeast Johnson County-Upper
Wind River Basin-
Including the cities of Kaycee and Dubois
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 5 inches. Winds 
  gusting as high as 60 mph.

* WHERE...Owl Creek and Bridger Mountains, Upper Wind River Basin, 
  and Southeast Johnson County.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-018-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Wind River Mountains East-Lander Foothills-
Including the cities of Lander
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 4 inches. Winds 
  gusting as high as 35 mph.

* WHERE...Lander Foothills and Wind River Mountains East.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations between 1 and 9 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ024-190000-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Salt River and Wyoming Ranges-
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...Salt River and Wyoming Ranges.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Salt River Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-191200-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Green River, Rock Springs, and Wamsutter
1210 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to 6 inches. Winds 
  gusting as high as 50 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute along Interstate 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Gerhardt

Permalink to 202503182348-KRIW-WWUS45-WSWRIW

366 
WWUS45 KRIW 182348
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
548 PM MDT Tue Mar 18 2025

WYZ001-002-012-190100-
/O.EXP.KRIW.WS.W.0009.000000T0000Z-250319T0000Z/
Yellowstone National Park-Absaroka Mountains-Teton and Gros
Ventre Mountains-
Including the cities of Old Faithful, Lake, and Mammoth
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING...

Snow has tapered off and main threat has ended. 

$$

WYZ007-016-018-024-190100-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250319T0000Z/
Owl Creek and Bridger Mountains-Upper Wind River Basin-Lander
Foothills-Salt River and Wyoming Ranges-
Including the cities of Dubois and Lander
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM MDT THIS EVENING...

Snow has tapered off and main threat has ended. 

$$

WYZ008-009-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations up to 5 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Bighorn Mountains.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Tuesday evening commute over Powder River/Granite 
  Passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ010-190500-
/O.CON.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Northeast Johnson County-
Including the cities of Buffalo
548 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Heavy snow. Additional snow accumulations between 1 and 3 
  inches. Winds gusting as high as 50 mph.

* WHERE...Northeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Travel could be difficult. Areas of blowing snow could 
  significantly reduce visibility. The hazardous conditions could 
  impact the Tuesday evening commute along Interstates 90 and 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ011-190500-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Southeast Johnson County-
Including the cities of Kaycee
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...Southeast Johnson County.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ015-190500-
/O.EXT.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Wind River Mountains East-
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 4 inches. Winds 
  gusting as high as 50 mph.

* WHERE...Wind River Mountains East.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ020-190500-
/O.EXT.KRIW.WW.Y.0017.000000T0000Z-250319T0500Z/
Natrona County Lower Elevations-
Including the cities of Casper
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 35 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute along 
  Interstate 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ019-022-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Green Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MDT THIS 
EVENING...

* WHAT...Snow. Additional snow accumulations up to 5 inches. Winds 
  gusting as high as 50 mph.

* WHERE...Casper Mountain and Green Mountains and Rattlesnake Range.

* WHEN...Until 11 PM MDT this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

WYZ028>030-190500-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
548 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to 2 to 4 inches. 
  Winds gusting as high as 40 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Tuesday evening commute. Gusty winds 
  could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Lowe

Permalink to 202503190434-KRIW-WWUS45-WSWRIW

285 
WWUS45 KRIW 190434
WSWRIW

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1034 PM MDT Tue Mar 18 2025

WYZ008>010-190545-
/O.EXP.KRIW.WS.W.0009.000000T0000Z-250319T0500Z/
Bighorn Mountains West-Bighorn Mountains Southeast-Northeast
Johnson County-
Including the cities of Buffalo
1034 PM MDT Tue Mar 18 2025

...WINTER STORM WARNING WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ011-015-019-022-190545-
/O.EXP.KRIW.WW.Y.0016.000000T0000Z-250319T0500Z/
Southeast Johnson County-Wind River Mountains East-Green
Mountains and Rattlesnake Range-Casper Mountain-
Including the cities of Jeffrey City and Kaycee
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ020-190545-
/O.EXP.KRIW.WW.Y.0017.000000T0000Z-250319T0500Z/
Natrona County Lower Elevations-
Including the cities of Casper
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MDT THIS EVENING...

Snow has tapered off and the  main threat has ended. 

$$

WYZ028>030-191200-
/O.CON.KRIW.WW.Y.0016.000000T0000Z-250319T1200Z/
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Rock Springs, Green River, and Wamsutter
1034 PM MDT Tue Mar 18 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT 
WEDNESDAY...

* WHAT...Snow. Additional snow accumulations up to two inches. Winds 
  gusting as high as 40 mph.

* WHERE...East Sweetwater County, Flaming Gorge, and Rock Springs 
  and Green River.

* WHEN...Until 6 AM MDT Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the Tuesday evening commute along Interstate 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including the 
official NWS forecast, high end amounts, and low end amounts, visit 
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of 
Transportation, visit https://wyoroad.info .

&&

$$

For more information from the National Weather Service, visit 
https://weather.gov/riw/ .

Lowe

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All Storm Reports within Event Political Coverage

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This table lists other events issued by the selected office for the selected year. Click on the row to select that event.

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ID	Product Issued	VTEC Issued	Initial Expire	VTEC Expire	Area km**2	Locations	Signature
1	2025-01-01T19:15:00Z	2025-01-01T19:15:00Z	2025-01-02T18:00:00Z	2025-01-02T17:06:00Z	13569	Teton and Gros Ventre Mountains [WY], Salt River and Wyoming Ranges [WY]	Dziewaltowski
2	2025-01-17T21:39:00Z	2025-01-17T21:39:00Z	2025-01-18T15:00:00Z	2025-01-18T15:00:00Z	1029	Lander Foothills [WY]	Hensley
3	2025-01-30T19:48:00Z	2025-01-31T18:00:00Z	2025-02-03T06:00:00Z	2025-02-04T00:00:00Z	44715	Star Valley [WY], Teton and Gros Ventre Mountains [WY], Salt River and Wyoming Ranges [WY], Upper Green River Basin Foothills [WY], Jackson Hole [WY], Yellowstone National Park [WY], Wind River Mountains West [WY], Wind River Mountains East [WY], Absaroka Mountains [WY]	Straub
4	2025-02-06T08:52:00Z	2025-02-07T06:00:00Z	2025-02-08T06:00:00Z	2025-02-08T03:46:00Z	21186	Salt River and Wyoming Ranges [WY], Teton and Gros Ventre Mountains [WY], Wind River Mountains West [WY], Wind River Mountains East [WY]	Straub
5	2025-02-12T19:29:00Z	2025-02-13T20:00:00Z	2025-02-15T18:00:00Z	2025-02-15T18:00:00Z	17895	Teton and Gros Ventre Mountains [WY], Salt River and Wyoming Ranges [WY], Upper Green River Basin Foothills [WY], Jackson Hole [WY], Star Valley [WY]	Rowe
6	2025-02-15T21:26:00Z	2025-02-16T09:00:00Z	2025-02-18T12:00:00Z	2025-02-19T06:00:00Z	32771	Yellowstone National Park [WY], Absaroka Mountains [WY], Teton and Gros Ventre Mountains [WY], Salt River and Wyoming Ranges [WY]	Myers
7	2025-02-23T18:28:00Z	2025-02-23T18:28:00Z	2025-02-24T18:00:00Z	2025-02-24T14:07:00Z	6426	Teton and Gros Ventre Mountains [WY]	Wittmann
8	2025-03-05T08:19:00Z	2025-03-06T03:00:00Z	2025-03-07T12:00:00Z	2025-03-07T12:00:00Z	85185	Wind River Mountains West [WY], Cody Foothills [WY], Southwest Bighorn Basin [WY], Owl Creek and Bridger Mountains [WY], Natrona County Lower Elevations [WY], Casper Mountain [WY], Northeast Johnson County [WY], Southeast Johnson County [WY], Green Mountains and Rattlesnake Range [WY], Upper Wind River Basin [WY], Wind River Basin [WY], Salt River and Wyoming Ranges [WY], Upper Green River Basin Foothills [WY], Upper Green River Basin [WY], Teton and Gros Ventre Mountains [WY], Bighorn Mountains Southeast [WY], Lander Foothills [WY], Wind River Mountains East [WY]	Rowe
9	2025-03-17T08:54:00Z	2025-03-17T12:00:00Z	2025-03-19T05:00:00Z	2025-03-19T05:00:00Z	41046	Teton and Gros Ventre Mountains [WY], Yellowstone National Park [WY], Absaroka Mountains [WY], Wind River Mountains East [WY], Lander Foothills [WY], Bighorn Mountains Southeast [WY], Bighorn Mountains West [WY], Northeast Johnson County [WY]	TL

Showing 1 to 9 of 9 entries