Winter Weather Warnings / Watches / Advisories
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
887 WWUS45 KRIW 041217 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 517 AM MST Thu Dec 4 2025 WYZ012-024-050330- /O.CON.KRIW.WS.W.0012.251205T0000Z-251206T2100Z/ Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges- 517 AM MST Thu Dec 4 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM MST SATURDAY... * WHAT...Heavy snow expected. Total snow accumulations of 12 to 20 inches across much of the area with the highest elevations seeing 2 to 3 feet. Gusty winds of 25 to 40 mph will be common. Higher elevations of the Salt River and Wyoming Ranges could gust above 45 mph. * WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming Ranges. * WHEN...From 5 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult, especially over Teton, Togwotee, and Salt River Passes. The hazardous conditions could impact the Friday morning and evening commutes. * ADDITIONAL DETAILS...A brief lull in snowfall rates may occur during the day Friday with the heaviest snowfall likely to arrive Friday night through Saturday morning. Gusty winds of 20 to 30 mph look to accompany the heavy snowfall which may create reduced visibility and drifting snow. 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 . && $$ WYZ001-002-050330- /O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/ Yellowstone National Park-Absaroka Mountains- Including the cities of Mammoth, Old Faithful, and Lake 517 AM MST Thu Dec 4 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches; accumulations of 10 to 15 inches at the South and Northeast entrances and near Pahaska; locally higher amounts of 1 to 2 feet in the higher elevations in the Pitchstone Plateau and the western slopes of the Absarokas. Winds gusting as high as 45 mph over the Absarokas through the period. Gusts as high as 35 mph in Yellowstone NP Friday night. * WHERE...Absaroka Mountains and Yellowstone National Park. * WHEN...From 5 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ008-050330- /O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/ Bighorn Mountains West- 517 AM MST Thu Dec 4 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations of 8 to 16 inches from Cloud Peak and Granite Pass northward. Minimal snowfall amounts south of Powder River Pass. * WHERE...Bighorn Mountains West. * WHEN...From 5 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult over Granite Pass. The hazardous conditions could impact the Thursday evening and Friday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. 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 . && $$ WYZ013-023-050330- /O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/ Jackson Hole-Star Valley- Including the cities of Jackson, Thayne, Alpine, Star Valley Ranch, and Afton 517 AM MST Thu Dec 4 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 7 and 12 inches, with locally higher amounts up to 18 inches in the foothill areas. * WHERE...Jackson Hole and Star Valley. * WHEN...From 5 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ014-025-050330- /O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/ Wind River Mountains West-Upper Green River Basin Foothills- Including the cities of Pinedale 517 AM MST Thu Dec 4 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 2 PM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations 6 to 9 inches toward Bondurant/Hoback Junction; amounts of 2 to 4 inches near Pinedale. Accumulations of 8 to 16 inches in the mountains. Winds gusting as high as 45 mph over South Pass Friday night. * WHERE...Wind River Mountains West and Upper Green River Basin Foothills. * WHEN...From 5 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult through Hoback Junction. The hazardous conditions could impact the Thursday evening and Friday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. 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 . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . TL