Weather Alerts For Big Sky Ski And Summer Resort, MT

URGENT - WINTER WEATHER MESSAGE National Weather Service Great Falls MT 147 PM MST Thu Dec 18 2025 Gallatin and Madison County Mountains and Centennial Mountains- Including the following locations: Targhee Pass, West Yellowstone, Big Sky, and Raynolds Pass 147 PM MST Thu Dec 18 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MST FRIDAY NIGHT... * WHAT...Periods of snow expected. Total snow accumulations between 3 and 6 inches with up to 10 inches above 7000 ft. Winds gusting as high as 50 mph over ridgetops. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 6 PM this evening to midnight MST Friday Night. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period. &&