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Home Return to list Winter Weather Advisory 0023 Issued by the Missoula Forecast Office
Action: New Issued At: 2026-05-15 12:39:20 158 WWUS45 KMSO 151738 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1138 AM MDT Fri May 15 2026 MTZ002-043-180600- /O.NEW.KMSO.WW.Y.0023.260517T0600Z-260518T0600Z/ West Glacier Region-Potomac/Seeley Lake Region- 1138 AM MDT Fri May 15 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT SATURDAY NIGHT TO MIDNIGHT MDT SUNDAY NIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ006-007-180600- /O.NEW.KMSO.WW.Y.0023.260517T0600Z-260518T0600Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- 1138 AM MDT Fri May 15 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT SATURDAY NIGHT TO MIDNIGHT MDT SUNDAY NIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Homestake Pass, Lolo Pass, Georgetown Lake, MacDonald Pass, Highway 93 Sula to Lost Trail Pass, and Butte. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ Action: New Issued At: 2026-05-15 12:39:20 158 WWUS45 KMSO 151738 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 1138 AM MDT Fri May 15 2026 MTZ002-043-180600- /O.NEW.KMSO.WW.Y.0023.260517T0600Z-260518T0600Z/ West Glacier Region-Potomac/Seeley Lake Region- 1138 AM MDT Fri May 15 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT SATURDAY NIGHT TO MIDNIGHT MDT SUNDAY NIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ006-007-180600- /O.NEW.KMSO.WW.Y.0023.260517T0600Z-260518T0600Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- 1138 AM MDT Fri May 15 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT SATURDAY NIGHT TO MIDNIGHT MDT SUNDAY NIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Homestake Pass, Lolo Pass, Georgetown Lake, MacDonald Pass, Highway 93 Sula to Lost Trail Pass, and Butte. * WHEN...From midnight Saturday Night to midnight MDT Sunday Night. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ Action: Continued Issued At: 2026-05-17 09:50:47 119 WWUS45 KMSO 171450 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 850 AM MDT Sun May 17 2026 IDZ005-006-180600- /O.EXB.KMSO.WW.Y.0023.260517T1500Z-260518T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 750 AM PDT Sun May 17 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 5000 FEET... * WHAT...Snow expected above 5000 feet. Total snow accumulations up to 10 inches above 6,000 ft, and accumulations up to 5 inches above 5,000 ft. * WHERE...Dixie. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ002-043-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ West Glacier Region-Potomac/Seeley Lake Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ006-007-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Highway 93 Sula to Lost Trail Pass, Homestake Pass, Georgetown Lake, MacDonald Pass, Butte, and Lolo Pass. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ Action: Time and Area Extended Issued At: 2026-05-17 09:50:47 119 WWUS45 KMSO 171450 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 850 AM MDT Sun May 17 2026 IDZ005-006-180600- /O.EXB.KMSO.WW.Y.0023.260517T1500Z-260518T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 750 AM PDT Sun May 17 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 5000 FEET... * WHAT...Snow expected above 5000 feet. Total snow accumulations up to 10 inches above 6,000 ft, and accumulations up to 5 inches above 5,000 ft. * WHERE...Dixie. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ002-043-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ West Glacier Region-Potomac/Seeley Lake Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ006-007-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Highway 93 Sula to Lost Trail Pass, Homestake Pass, Georgetown Lake, MacDonald Pass, Butte, and Lolo Pass. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ Action: Continued Issued At: 2026-05-17 09:50:47 119 WWUS45 KMSO 171450 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 850 AM MDT Sun May 17 2026 IDZ005-006-180600- /O.EXB.KMSO.WW.Y.0023.260517T1500Z-260518T0600Z/ Northern Clearwater Mountains-Southern Clearwater Mountains- 750 AM PDT Sun May 17 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 5000 FEET... * WHAT...Snow expected above 5000 feet. Total snow accumulations up to 10 inches above 6,000 ft, and accumulations up to 5 inches above 5,000 ft. * WHERE...Dixie. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ002-043-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ West Glacier Region-Potomac/Seeley Lake Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible on Marias Pass. * WHERE...The higher terrain of Glacier National Park. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ MTZ006-007-180600- /O.CON.KMSO.WW.Y.0023.000000T0000Z-260518T0600Z/ Bitterroot/Sapphire Mountains-Butte/Blackfoot Region- 850 AM MDT Sun May 17 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT ABOVE 5000 FEET... * WHAT...Snow expected. Total snow accumulations of 2 to 6 inches in the mountain terrain above 5000 feet. Accumulations up to 10 inches above 6,000 ft. Slushy accumulations possible for Lost Trail, Homestake and MacDonald Passes and around Georgetown Lake. Winds gusting as high as 35 mph. * WHERE...Highway 93 Sula to Lost Trail Pass, Homestake Pass, Georgetown Lake, MacDonald Pass, Butte, and Lolo Pass. * WHEN...Until midnight MDT tonight. * IMPACTS...Plan on slippery backcountry road conditions. Cold, wet and breezy conditions may create hypothermia risk for those recreating in the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling on high mountain roads. Pack full waterproof layers and thermal gear to ensure you stay warm and dry if recreating in the backcountry. && $$ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||