WWUS45 KMSO 131938 WSWMSO URGENT - WINTER WEATHER MESSAGE National Weather Service Missoula MT 138 PM MDT Fri Mar 13 2026 MTZ007-150600- /O.CAN.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ /O.NEW.KMSO.WW.Y.0015.260313T1938Z-260315T0600Z/ Butte/Blackfoot Region- 138 PM MDT Fri Mar 13 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT MDT SATURDAY NIGHT... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Snow. There is a likelihood of developing or ongoing moderate to isolated major winter weather impacts. Additional snow accumulations of 1 to 4 inches along I 90, 4 to 8 elsewhere. Winds gusting as high as 55 mph. * WHERE...MacDonald Pass, Highway 12 Garrison to Elliston, Georgetown Lake, Butte, and Homestake Pass. * WHEN...Until midnight MDT Saturday 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. Strong winds could cause tree damage. * ADDITIONAL DETAILS...The Blackfoot Region, Georgetown Lake, and MacDonald Pass are the main spots for snow through Saturday morning. Intense snow squalls are expected Saturday afternoon through evening causing periods of very heavy snow, gusty winds, and icy 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. && $$ IDZ005-141800- /O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ Northern Clearwater Mountains- 1238 PM PDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT SATURDAY... * WHAT...Heavy snow expected. There is a likelihood of major to extreme winter storm impacts. Total snow accumulations 2 to 8 inches in the lower elevations and 20 to 50 inches in the higher terrain. Winds gusting as high as 30 mph. * WHERE...Highway 11 Pierce to Headquarters, Pierce, and Elk River. * WHEN...Until 11 AM PDT Saturday. * IMPACTS... For EXTREME winter storm impacts, expect substantial disruptions to normal activities. Extremely dangerous or impossible traveling conditions. Travel in the impacted areas is not advised. Extensive and widespread closures and disruptions to infrastructure may occur. Life saving actions may be needed. The hazardous conditions could impact the Friday evening commute, especially over higher passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IDZ006-141800- /O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ Southern Clearwater Mountains- 1238 PM PDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT SATURDAY ABOVE 5000 FEET... * WHAT...Heavy snow above 5000 feet. There is a likelihood of major winter storm impacts. Additional snow accumulations trace to 2 inches in the lower elevations, 6 to 12 inches above 5000 feet, with over 2 feet of snow in the high terrain. Winds gusting up to 40 mph. * WHERE...Dixie and Lolo Pass. * WHEN...Until 11 AM PDT Saturday. * 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 Friday evening commutes, especially over higher passes. 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. && $$ MTZ002-141800- /O.CON.KMSO.WS.W.0003.000000T0000Z-260314T1800Z/ West Glacier Region- 138 PM MDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY... * WHAT...Heavy snow. There is a chance of developing or ongoing major winter weather impacts. Additional snow accumulations between 2 and 8 inches. * WHERE...Essex, Polebridge, Marias Pass, Highway 83 Bigfork to Swan Lake, Glacier National Park, and Bad Rock Canyon. * WHEN...Until noon MDT Saturday. * IMPACTS...For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Friday evening and Saturday morning commute, especially over higher passes. * ADDITIONAL DETAILS...Intense snow squalls are expected Saturday morning through afternoon causing periods of very heavy snow, gusty winds, and icy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Persons should consider delaying all travel. If travel is absolutely necessary, drive with extreme caution. Consider taking a winter storm kit along with you, including such items as tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded. && $$ MTZ004-141800- /O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ Lower Clark Fork Region- 138 PM MDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY... * WHAT...Heavy snow. There is a likelihood of developing or ongoing major winter weather impacts. Additional snow accumulations of 6 to 10 inches, except 1 to 3 inches in the lower elevations. * WHERE...Evaro Hill, Highway 200 Trout Creek to Heron, I-90 Lookout Pass to Haugan, and Highway 200 Thompson Falls to Plains. * WHEN...Until noon MDT Saturday. * 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 Friday evening commute, especially over higher passes. * ADDITIONAL DETAILS...Intense snow squalls are expected Saturday afternoon through evening causing periods of very heavy snow, gusty winds, and icy conditions. 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. && $$ MTZ006-141800- /O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ Bitterroot/Sapphire Mountains- 138 PM MDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY ABOVE 5000 FEET... * WHAT...Heavy snow above 5000 feet. There is the likelihood of ongoing major winter weather impacts. Additional snow accumulations between 2 and 5 inches in the lower elevations, 6 to 12 inches over Lost Trail and Lolo Passes, with 2 feet in the high terrain. Winds gusting as high as 40 mph. * WHERE...Lolo Pass and Highway 93 Sula to Lost Trail Pass. * WHEN...Until noon MDT Saturday. * IMPACTS...For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Friday evening commute, especially over higher passes. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MTZ043-141800- /O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/ Potomac/Seeley Lake Region- 138 PM MDT Fri Mar 13 2026 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY... * WHAT...Heavy snow. There is a likelihood of developing or ongoing major winter weather impacts. Additional snow accumulations of 2 to 5 inches in the valleys and 12 to 24 inches in the mountains. Winds gusting as high as 35 mph. * WHERE...I-90 East Missoula to Bearmouth, Highway 200 Bonner to Greenough, and Highway 83 Seeley Lake to Condon. * WHEN...Until noon MDT Saturday. * 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 Friday evening commute, especially over higher passes. * ADDITIONAL DETAILS...Intense snow squall are expected Saturday afternoon through evening causing periods of very heavy snow, gusty winds, and icy conditions. 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. && $$ MTZ003-150000- /O.NEW.KMSO.WW.Y.0015.260314T0300Z-260315T0000Z/ Flathead/Mission Valleys- 138 PM MDT Fri Mar 13 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM MDT SATURDAY... * WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations between 2 and 6 inches. Winds gusting as high as 40 mph. * WHERE...Flathead Valley, Mission Valley, Flathead Lake, and Polson. * WHEN...From 9 PM this evening to 6 PM MDT Saturday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. * ADDITIONAL DETAILS...Overnight accumulations range from 1 to 3 inches. Intense snow squall are expected Saturday morning through afternoon causing periods of very heavy snow, gusty winds, and icy conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ JK