Active AlertsAlta, WY

What: Heavy snow. Total snow accumulations between 12 and 18 inches and up to 24 inches along the western slopes of the Tetons. 6 to 10 inches of total snow accumulation is expected in Yellowstone National Park, with amounts up to 18 inches along higher elevations across southern portions of the park. The Mammoth area will see 1 to 3 inches. Winds could gust as high as 45 mph.
Where: Teton and Gros Ventre Mountains and Yellowstone National Park.
When: Until 6 PM MDT Friday.
Impacts: Travel could be very difficult, including over Teton Pass and Togwotee Pass.

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 .