Forecast Snowfall through Wednesday URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 310 AM MST Mon Dec 19 2022 Star Valley-Salt River and Wyoming Ranges- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne 310 AM MST Mon Dec 19 2022 ...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 PM MST WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 5 to 9 inches in the Star Valley; 10 to 16 inches in the Mountains. Winds gusting as high as 50 mph. * WHERE...Star Valley and Salt River and Wyoming Ranges. * WHEN...From 11 PM this evening to 11 PM MST Wednesday. The heaviest snow is expected later Tuesday night into Wednesday morning. * IMPACTS...Travel will be very difficult especially over mountain passes which includes Salt River Pass. Snow and blowing snow will severely limit visibility at times especially in the mountains. * ADDITIONAL DETAILS...Backcountry enthusiasts including snowmobilers can easily become disoriented and lost. Frostbite and hypothermia can set in quickly. Please monitor the Bridger- Teton Avalanche Center at JHAVALANCHE.ORG, if your plans include travel into the backcountry. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.