WWUS45 KMSO 211950 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 150 PM MDT Tue Apr 21 2026 IDZ006-241800- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T1800Z/ Southern Clearwater Mountains- 1250 PM PDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM WEDNESDAY TO 11 AM PDT FRIDAY ABOVE 4000 FEET... * WHAT...Snow expected above 4000 feet. There is a likelihood of moderate winter weather impacts. Total snow accumulations of 1 to 4 inches below 5000 feet, 6 to 10 inches at pass level and over 12 inches in the high terrain. * WHERE...Elk City and Dixie. * WHEN...From 5 PM Wednesday to 11 AM PDT Friday. * 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. The hazardous conditions could impact the Wednesday evening and Thursday morning commutes, especially over higher passes. * ADDITIONAL DETAILS...Lower elevation snow accumulations are most likely Thursday night. 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. && $$ IDZ009-010-241800- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T1800Z/ Western Lemhi County-Eastern Lemhi County- 150 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY... * WHAT...Snow expected. There is a likelihood of minor to moderate winter weather impacts. Total snow accumulations between 1 to 3 inches in the valleys, 5 to 10 inches at pass level and over 12 inches in the high terrain. * WHERE...Salmon, Bannock Pass, Shoup, Williams Creek Summit, Highway 28 Tendoy to Lone Pine, Lemhi Pass, and Highway 93 Lost Trail Pass to Gibbonsville. * WHEN...From 6 PM Wednesday to noon MDT Friday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. * ADDITIONAL DETAILS...Valley accumulations are most likely Thursday night. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ002-240000- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T0000Z/ West Glacier Region- 150 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO 6 PM MDT THURSDAY... * WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations of 1 to 3 inches below 4000 feet, 4 to 7 inches at pass level and over 10 inches in the high terrain. * WHERE...Glacier National Park, Marias Pass, Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, and Polebridge. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * 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. 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. && $$ MTZ006-241800- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T1800Z/ Bitterroot/Sapphire Mountains- 150 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY... * WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations of 1 to 5 inches below 4000 feet, 6 to 10 inches at pass level and over 12 inches in the high terrain. * WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass. * WHEN...From 6 PM Wednesday to noon MDT Friday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ007-241800- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T1800Z/ Butte/Blackfoot Region- 150 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY... * WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations of 2 and 5 inches in the valleys, 5 to 10 inches at pass level, and over 12 inches in the high terrain. Winds gusting as high as 35 mph. * WHERE...Georgetown Lake, Butte, Highway 12 Garrison to Elliston, MacDonald Pass, and Homestake Pass. * WHEN...From 6 PM Wednesday to noon MDT Friday. * 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. * ADDITIONAL DETAILS...The most impactful snow accumulations are most likely to occur Thursday evening through Friday morning. 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. && $$ MTZ043-241800- /O.NEW.KMSO.WW.Y.0021.260423T0000Z-260424T1800Z/ Potomac/Seeley Lake Region- 150 PM MDT Tue Apr 21 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM WEDNESDAY TO NOON MDT FRIDAY... * WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations of 2 and 4 inches in the valleys and 6 to 12 inches in the mountains. * WHERE...Highway 200 Bonner to Greenough, I-90 East Missoula to Bearmouth, and Highway 83 Seeley Lake to Condon. * WHEN...From 6 PM Wednesday to noon MDT Friday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. * ADDITIONAL DETAILS...The most impactful snow accumulations are most likely to occur Thursday evening through Friday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ JK