Weather Alerts For Yellowstone Lake, WY

URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 859 AM MST Tue Dec 9 2025 Yellowstone National Park-Absaroka Mountains- Including the cities of Mammoth, Lake, and Old Faithful 859 AM MST Tue Dec 9 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY... * WHAT...Heavy snow. Additional snow accumulations between 10 and 20 inches, with the highest amounts in the western Absarokas and southwestern Yellowstone Park. Northern Yellowstone Park will see 4 to 8 inches of snow with much lower amounts, less than 2 inches at Mammoth. Winds gusting as high as 60 to 70 mph across the ridgetops. * WHERE...Absaroka Mountains and Yellowstone National Park. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult across Yellowstone Park and along Chief Joseph Highway. Significant blowing and drifting of snow is expected. Backcountry travel is not advised. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . &&