Winter Weather Warnings / Watches / Advisories
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
298 WWUS45 KRIW 051953 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 1253 PM MST Fri Dec 5 2025 WYZ008-061300- /O.UPG.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/ /O.EXB.KRIW.WS.W.0012.000000T0000Z-251207T0000Z/ Bighorn Mountains West- 1253 PM MST Fri Dec 5 2025 ...WINTER STORM WARNING IN EFFECT UNTIL 5 PM MST SATURDAY... * WHAT...Snow expected. Additional snow accumulations of 10 to 18 inches over central and northern portions of the Bighorns. Snow amounts of 1 to 6 inches are forecast for the southern portion. * WHERE...Bighorn Mountains West. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel could be very difficult over Granite and Powder River Passes. The hazardous conditions could impact the Friday evening and Saturday morning commutes. * ADDITIONAL DETAILS...Heavy periods of snow are expected Saturday morning when snowfall rates of 1 or more inches will be possible. 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 . && $$ WYZ012-024-061300- /O.CON.KRIW.WS.W.0012.000000T0000Z-251206T2100Z/ Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges- 1253 PM MST Fri Dec 5 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM MST SATURDAY... * WHAT...Heavy snow. Additional snow accumulations between 6 to 12 inches with higher elevations seeing an additional foot or two of snow. Winds gusting as high as 60 mph. * WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming Ranges. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be very difficult, especially over Teton, Togwotee, and Salt River Passes. The hazardous conditions could impact the Friday evening commute. * ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday evening and continues through the overnight hours, this is when a bulk of the snow accumulations will occur. Gusty west winds of 25 to 40 mph, and possibly above 45 mph across higher elevations, occur after sunset Friday and continue into Saturday morning. Heavy snowfall and gusty winds could cause reduced visibility and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ001-002-061300- /O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/ Yellowstone National Park-Absaroka Mountains- Including the cities of Lake, Old Faithful, and Mammoth 1253 PM MST Fri Dec 5 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST SATURDAY... * WHAT...Snow expected. Additional snow accumulations of 2 to 6 inches; accumulations of 10 to 15 inches at the South and Northeast entrances and near Pahaska; locally higher amounts of one to two feet in the higher elevations in the Pitchstone Plateau and the western slopes of the Absarokas. Gusty winds of 20 to 35 mph across Yellowstone National Park and 30 to 50 mph across the Absaroka Mountains. * WHERE...Absaroka Mountains and Yellowstone National Park. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact any travel through the area. * ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday evening and continues through the overnight hours, this is when a bulk of the additional snow accumulations will occur. Gusty winds are expected after sunset Friday and continue into Saturday morning. Heavy snowfall and gusty winds could cause reduced visibility and drifting snow. 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 . && $$ WYZ013-023-061300- /O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/ Jackson Hole-Star Valley- Including the cities of Thayne, Star Valley Ranch, Alpine, Afton, and Jackson 1253 PM MST Fri Dec 5 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST SATURDAY... * WHAT...Snow expected. Additional snow accumulations of 2 to 6 inches, with locally higher amounts of 6 to 12 inches in the foothill areas. Gusty winds of 20 to 25 mph. * WHERE...Jackson Hole and Star Valley. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be difficult. The hazardous conditions could impact the Friday evening commute. * ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday evening and continues through the overnight hours, this is when a bulk of the additional snow accumulations will occur. Gusty west winds of 20 to 25 mph are expected after sunset Friday and continue into Saturday morning. Heavy snowfall and gusty winds could cause reduced visibility and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ014-025-061300- /O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/ Wind River Mountains West-Upper Green River Basin Foothills- Including the cities of Pinedale 1253 PM MST Fri Dec 5 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST SATURDAY... * WHAT...Snow expected. Additional snow accumulations of 4 to 8 inches toward Bondurant/Hoback Junction; amounts of 2 to 6 inches near Pinedale. Additional snow accumulations of 10 to 20 inches in the mountains. Gusty winds of 20 to 35 mph across the Upper Green River Basin and west Wind River Mountains, and up to 45 mph across the highest elevations. Wind gusts as high as 45 mph over South Pass Friday night. * WHERE...Wind River Mountains West and Upper Green River Basin Foothills. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Friday evening commutes. * ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday evening and continues through the overnight hours, this is when a bulk of the additional snow accumulations will occur. Gusty west winds of 20 to 35 mph are expected after sunset Friday and continue into Saturday morning. Heavy snowfall and gusty winds could cause reduced visibility and drifting snow. 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/ . Dziewaltowski