Winter Storm Watch

Locations Affected

Mount Sheridan, WY ∙ Willow Lake, WY ∙ Colter Peak, WY ∙ Atlantic Peak, WY ∙ Yellow Mountain, WY ∙ Fossil Butte National Monument, WY ∙ Cottonwood Peak, WY ∙ Mount Hancock, WY ∙ Dinwoody Peak, WY ∙ Pahaska Tepee, WY

Full Alert Message

URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1258 PM MST Mon Dec 15 2025 ...WINTER STORM WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY EVENING... * WHAT...Heavy snow possible. Total snow accumulations 6 to 10 inches above 8000 feet possible, with near 12 inches at the highest elevations. Widespread westerly winds gusting 40 to 60 mph, with isolated stronger winds. * WHERE...Portions of central, northwest, and west central Wyoming. * WHEN...From late Tuesday night through Wednesday evening. * IMPACTS...Travel will likely be very difficult, namely along mountain passes like Teton, Togwotee, and South Pass due to a combination of strong winds and falling snow reducing visibilities. * ADDITIONAL DETAILS...Areas of winds near 75 mph possible, especially for eastern mountain slopes, like the eastern Absaroka and Wind River Mountains. The heaviest snow occurs between about 1 AM and noon MST Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts for updates on this situation.

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