Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

Heavy snow is expected in the Sierra Nevada mountain ranges into Saturday causing hazardous travel conditions. Winter Storm Warnings have been issued. Thunderstorms and moderate to heavy rainfall are expected across portions of eastern Texas into Louisiana on Sunday. Read More >

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Last Map Update: Sat, Nov 14, 2026 at 4:50:15 pm MST

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Special Weather Statement

Snow in Southwest Montana and Lemhi County

Possible Fog and Stratus Through Weekend

Slick and snow-covered roads are possible across southwest Montana and Lemhi County from Monday night through Wednesday morning. Snow levels are expected to drop to between 2,500 and 4,000 feet. There is a high probability (70-90%) of accumulating at least 1 inch of snow, with a moderate chance (30-60%) of seeing amounts exceed 3 inches. Travel will be impacted, particularly over mountain passes like Lost Trail and Homestake, where visibility reductions and slick conditions are most likely during the overnight and early morning hours.

Strong valley inversions will bring a chance of fog and low stratus to the Northern Rockies from through Monday Nov. 15. Areas across North-central Idaho and Western Montana valleys—including major routes like I-90, US-93, US-2, US-12, US-95, MT-200, MT-83, and MT-56—may experience localized travel hazards caused by low visibility and icy road surfaces from freezing fog. Allow extra travel time and use low-beam headlights when driving through valley fog.

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Heavy Snow in the Sierra Nevada; Heavy Rainfall in Texas Sunday

NWS Forecast Office Missoula, MT