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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