Weather Alerts For South Pass City, WY

URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1217 PM MST Sat Dec 20 2025 Wind River Mountains West-Wind River Mountains East- 1217 PM MST Sat Dec 20 2025 ...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 AM MST MONDAY... * WHAT...Heavy snow expected. Total snow accumulations 12 to 24 inches. Winds gusting as high as 70 mph. * WHERE...Wind River Mountains East and Wind River Mountains West. * WHEN...From 11 PM this evening to 5 AM MST Monday. * IMPACTS...Travel could be very difficult. Hazardous conditions could impact travel along South Pass. 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 . &&