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Home Return to list Winter Storm Watch 0012 Issued by the Missoula Forecast Office
Action: New Issued At: 2025-12-16 12:47:19 704 WWUS45 KMSO 161847 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1147 AM MST Tue Dec 16 2025 MTZ002-171900- /O.CON.KMSO.WS.W.0013.251217T0300Z-251218T0600Z/ West Glacier Region- 1147 AM MST Tue Dec 16 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 11 PM MST WEDNESDAY... * WHAT...Damaging winds and heavy snow expected. There is a likelihood of major winter weather impacts to isolated extreme winter storm impacts. Total snow accumulations of 2 to 5 in inches in the valleys and 8 to 12 inches at pass level. Damaging winds gusting as high as 60 mph in the lower elevations, 70 mph in higher terrain. * WHERE...Essex, Marias Pass, Bad Rock Canyon, Polebridge, Glacier National Park, and Highway 83 Bigfork to Swan Lake. * WHEN...From 8 PM this evening to 11 PM MST Wednesday. * IMPACTS...For MAJOR winter weather impacts, 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. The hazardous conditions could impact the Wednesday morning and evening commutes, especially over higher passes. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ006-MTZ006-171900- /O.NEW.KMSO.WS.A.0012.251218T1200Z-251220T1200Z/ Southern Clearwater Mountains-Bitterroot/Sapphire Mountains- 1147 AM MST Tue Dec 16 2025 /1047 AM PST Tue Dec 16 2025/ ...WINTER STORM WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH LATE FRIDAY NIGHT... * WHAT...Heavy snow possible. There is a chance of moderate to major winter weather impacts. Total snow accumulations between 1 to 5 inches in the valleys and up to 24 inches in the mountains possible. Winds could gust as high as 45 mph. * WHERE...Highway 93 Sula to Lost Trail Pass, Dixie, Elk City, Highway 12 Lowell to Lolo Pass, and Lolo Pass. * WHEN...From late Wednesday night through late Friday night. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation. && $$ Action: Upgraded Issued At: 2025-12-17 13:44:20 968 WWUS45 KMSO 171943 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1243 PM MST Wed Dec 17 2025 MTZ002-180600- /O.CON.KMSO.WS.W.0013.000000T0000Z-251218T0600Z/ West Glacier Region- 1243 PM MST Wed Dec 17 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING... * WHAT...Heavy snow. There is a likelihood of ongoing major winter weather impacts. Additional snow accumulations up to two inches. Winds gusting as high as 55 mph. * WHERE...Marias Pass, Bad Rock Canyon, Highway 83 Bigfork to Swan Lake, Polebridge, Glacier National Park, and Essex. * WHEN...Until 11 PM MST this evening. * IMPACTS...Winter traveling conditions. For MAJOR winter weather impacts, 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. The hazardous conditions could impact the Wednesday evening commute, especially over higher passes. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ006-MTZ006-181945- /O.UPG.KMSO.WS.A.0012.251218T1200Z-251220T1200Z/ /O.NEW.KMSO.WW.Y.0049.251219T0000Z-251220T1800Z/ Southern Clearwater Mountains-Bitterroot/Sapphire Mountains- 1243 PM MST Wed Dec 17 2025 /1143 AM PST Wed Dec 17 2025/ ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM MST /4 PM PST/ THURSDAY TO 11 AM MST /10 AM PST/ SATURDAY... * WHAT...Snow expected. There is a likelihood of minor winter weather impacts. Total snow accumulations between 8 and 15 inches higher elevations and 5 to 9 inches at Lolo and Lost Trail Passes. Winds gusting as high as 40 mph. * WHERE...Dixie, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, Lolo Pass, and Elk City. * WHEN...From 5 PM MST /4 PM PST/ Thursday to 11 AM MST /10 AM PST/ Saturday. * IMPACTS...Winter traveling conditions. For MINOR winter weather impacts, expect a few inconveniences to normal activities. Use caution while driving. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ004-181945- /O.NEW.KMSO.WW.Y.0049.251219T0000Z-251220T1800Z/ Lower Clark Fork Region- 1243 PM MST Wed Dec 17 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THURSDAY TO 11 AM MST SATURDAY... * WHAT...Snow expected. There is a likelihood of minor winter weather impacts. Total snow accumulations 4 to 7 inches at Lookout Pass. Winds gusting as high as 35 mph. * WHERE...I-90 Lookout Pass to Haugan. * WHEN...From 5 PM Thursday to 11 AM MST Saturday. * IMPACTS...Winter traveling conditions. For MINOR winter weather impacts, expect a few inconveniences to normal activities. Use caution while driving. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. 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. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||