Active Weather Alerts
Winter Storm Warning
Issued: 8:02 AM Dec. 19, 2025 – National Weather Service
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Heavy snow. Additional snow accumulations between 4 to 8 inches, with higher amounts of 10 to 20 inches in southern Yellowstone. Additional snow around Mammoth of 1 to 3 inches. Winds may be gusting as high as 55 mph at times. * WHERE...Yellowstone National Park. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult, especially in the backcountry. 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 . &&
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