IEM VTEC Product Browser
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13 Nov 2024 Update: The tool was updated to use non-hash link style URLs. A shim is in place to translate the old URLs to the new ones, so nothing should be broken (famous last words). This was done to allow the HTML5 History API to provide a better user experience.
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2025 [KMSO] MISSOULA Winter Storm (WS) Watch (A) Number 4
Listing of Counties/Parishes/Zones Included in Product
RADAR Composite at Issuance Time
Storm Based Warning History
076 WWUS45 KMSO 281630 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1030 AM MDT Fri Mar 28 2025 .A low pressure system will develop Saturday night across southwest Montana, but model guidance shows considerable uncertainty. A slower, stronger system could produce heavy snowfall in localized areas, while a weaker or faster-moving low would limit accumulations. MTZ007-292100- /O.NEW.KMSO.WS.A.0004.250330T0600Z-250330T1500Z/ Butte/Blackfoot Region- 1030 AM MDT Fri Mar 28 2025 ...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING... * WHAT...Heavy snow possible. Chance of moderate impacts is 80 percent, and major impacts from snow is at least 50 percent. There is a 35 percent chance that Georgetown Lake, Anaconda, Butte, and Homestake Pass could receive greater than 4 inches. There is a 10 percent chance that snowfall could exceed 10 inches from Georgetown Lake to Homestake Pass. Northern Granite and Powell counties have a lower probability of significant snowfall, except MacDonald Pass has a 25 percent chance of exceeding 4 inches. * WHERE...Interstate 90 between Warm Springs and Homestake Pass including Butte, Georgetown Lake, and Highway 12 Elliston to MacDonald Pass. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Roads, and especially bridges and overpasses, could become slick and hazardous. The weight of snow on tree limbs may impact power lines and could cause sporadic power outages. For MODERATE impacts from snow, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR impacts from snow, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. * ADDITIONAL DETAILS...Winds: Northerly winds between 10 and 20 mph are possible Saturday night and could worsen road conditions and reduce visibility further in the falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$
725 WWUS45 KMSO 291533 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 933 AM MDT Sat Mar 29 2025 MTZ007-301500- /O.UPG.KMSO.WS.A.0004.250330T0600Z-250330T1500Z/ /O.NEW.KMSO.WW.Y.0025.250330T0000Z-250330T1500Z/ Butte/Blackfoot Region- 933 AM MDT Sat Mar 29 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT SUNDAY... * WHAT...Snow expected. Likelihood of minor to moderate impacts from around 1 to 3 inches of snow is 60 percent, and 3 to 6 inches of snow is 20 percent. Likelihood of 10 inches or more of snow remains low at around 10 percent. * WHERE...MacDonald Pass, Highway 12 Garrison to Elliston, Butte, Georgetown Lake, and Homestake Pass. * WHEN...From 6 PM this evening to 9 AM MDT Sunday. * IMPACTS...For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. Winter traveling conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ009-010-301500- /O.NEW.KMSO.WW.Y.0025.250330T0000Z-250330T1500Z/ Western Lemhi County-Eastern Lemhi County- 933 AM MDT Sat Mar 29 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT SUNDAY... * WHAT...Snow expected. Likelihood of minor to moderate impacts from around 1 to 3 inches of snow is 70 percent, and 3 to 6 inches of snow is 20 percent. * WHERE...Highway 93 Lost Trail Pass to Gibbonsville, Highway 28 Tendoy to Lone Pine, Shoup, Bannock Pass, Williams Creek Summit, Salmon, and Lemhi Pass. * WHEN...From 6 PM this evening to 9 AM MDT Sunday. * IMPACTS...For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. Winter traveling conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
Permalink to 202503281630-KMSO-WWUS45-WSWMSO
076 WWUS45 KMSO 281630 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1030 AM MDT Fri Mar 28 2025 .A low pressure system will develop Saturday night across southwest Montana, but model guidance shows considerable uncertainty. A slower, stronger system could produce heavy snowfall in localized areas, while a weaker or faster-moving low would limit accumulations. MTZ007-292100- /O.NEW.KMSO.WS.A.0004.250330T0600Z-250330T1500Z/ Butte/Blackfoot Region- 1030 AM MDT Fri Mar 28 2025 ...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING... * WHAT...Heavy snow possible. Chance of moderate impacts is 80 percent, and major impacts from snow is at least 50 percent. There is a 35 percent chance that Georgetown Lake, Anaconda, Butte, and Homestake Pass could receive greater than 4 inches. There is a 10 percent chance that snowfall could exceed 10 inches from Georgetown Lake to Homestake Pass. Northern Granite and Powell counties have a lower probability of significant snowfall, except MacDonald Pass has a 25 percent chance of exceeding 4 inches. * WHERE...Interstate 90 between Warm Springs and Homestake Pass including Butte, Georgetown Lake, and Highway 12 Elliston to MacDonald Pass. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Roads, and especially bridges and overpasses, could become slick and hazardous. The weight of snow on tree limbs may impact power lines and could cause sporadic power outages. For MODERATE impacts from snow, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR impacts from snow, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. * ADDITIONAL DETAILS...Winds: Northerly winds between 10 and 20 mph are possible Saturday night and could worsen road conditions and reduce visibility further in the falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$
Permalink to 202503291533-KMSO-WWUS45-WSWMSO
725 WWUS45 KMSO 291533 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 933 AM MDT Sat Mar 29 2025 MTZ007-301500- /O.UPG.KMSO.WS.A.0004.250330T0600Z-250330T1500Z/ /O.NEW.KMSO.WW.Y.0025.250330T0000Z-250330T1500Z/ Butte/Blackfoot Region- 933 AM MDT Sat Mar 29 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT SUNDAY... * WHAT...Snow expected. Likelihood of minor to moderate impacts from around 1 to 3 inches of snow is 60 percent, and 3 to 6 inches of snow is 20 percent. Likelihood of 10 inches or more of snow remains low at around 10 percent. * WHERE...MacDonald Pass, Highway 12 Garrison to Elliston, Butte, Georgetown Lake, and Homestake Pass. * WHEN...From 6 PM this evening to 9 AM MDT Sunday. * IMPACTS...For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. Winter traveling conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ009-010-301500- /O.NEW.KMSO.WW.Y.0025.250330T0000Z-250330T1500Z/ Western Lemhi County-Eastern Lemhi County- 933 AM MDT Sat Mar 29 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 9 AM MDT SUNDAY... * WHAT...Snow expected. Likelihood of minor to moderate impacts from around 1 to 3 inches of snow is 70 percent, and 3 to 6 inches of snow is 20 percent. * WHERE...Highway 93 Lost Trail Pass to Gibbonsville, Highway 28 Tendoy to Lone Pine, Shoup, Bannock Pass, Williams Creek Summit, Salmon, and Lemhi Pass. * WHEN...From 6 PM this evening to 9 AM MDT Sunday. * IMPACTS...For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. Winter traveling conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
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