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Home Return to list Winter Weather Advisory 0005 Issued by the Riverton Forecast Office
Action: New Issued At: 2026-02-08 02:15:12 438 WWUS45 KRIW 080814 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 114 AM MST Sun Feb 8 2026 WYZ001-090000- /O.NEW.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Old Faithful, Mammoth, and Lake 114 AM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 7 to 12 inches across much of Yellowstone National Park, including the south and east park entrances. Isolated higher amounts up to 15 inches are possible over the highest terrain. Accumulations of 1 to 5 inches near Mammoth. Gusty 25 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...From 5 PM this afternoon to 5 PM MST Monday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11PM Sunday and 11AM Monday with snow rates up to 1 inch per hour possible. 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 . && $$ WYZ012-090000- /O.NEW.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 114 AM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 40 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...From 5 PM this afternoon to 5 PM MST Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11PM Sunday and 11AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Gerhardt Action: New Issued At: 2026-02-08 02:15:12 438 WWUS45 KRIW 080814 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 114 AM MST Sun Feb 8 2026 WYZ001-090000- /O.NEW.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Old Faithful, Mammoth, and Lake 114 AM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 7 to 12 inches across much of Yellowstone National Park, including the south and east park entrances. Isolated higher amounts up to 15 inches are possible over the highest terrain. Accumulations of 1 to 5 inches near Mammoth. Gusty 25 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...From 5 PM this afternoon to 5 PM MST Monday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11PM Sunday and 11AM Monday with snow rates up to 1 inch per hour possible. 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 . && $$ WYZ012-090000- /O.NEW.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 114 AM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 40 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...From 5 PM this afternoon to 5 PM MST Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11PM Sunday and 11AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Gerhardt Action: Continued Issued At: 2026-02-08 16:12:00 657 WWUS45 KRIW 082211 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 311 PM MST Sun Feb 8 2026 WYZ001-091400- /O.CON.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Lake, Old Faithful, and Mammoth 311 PM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 7 to 12 inches south and east of the Lower Loop of Yellowstone National Park. Isolated higher amounts up to 15 inches are possible over the highest terrain. Total accumulations of 3 to 6 inches along the Upper Loop and northern portions of the Lower Loop. Accumulations of 1 to 3 inches near Mammoth. Gusty 25 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Monday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11 PM Sunday and 11 AM Monday with snow rates up to 1 inch per hour possible. 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 . && $$ WYZ012-091400- /O.CON.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 311 PM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 50 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11 PM Sunday and 11 AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Myers Action: Continued Issued At: 2026-02-08 16:12:00 657 WWUS45 KRIW 082211 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 311 PM MST Sun Feb 8 2026 WYZ001-091400- /O.CON.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Lake, Old Faithful, and Mammoth 311 PM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 7 to 12 inches south and east of the Lower Loop of Yellowstone National Park. Isolated higher amounts up to 15 inches are possible over the highest terrain. Total accumulations of 3 to 6 inches along the Upper Loop and northern portions of the Lower Loop. Accumulations of 1 to 3 inches near Mammoth. Gusty 25 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Monday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11 PM Sunday and 11 AM Monday with snow rates up to 1 inch per hour possible. 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 . && $$ WYZ012-091400- /O.CON.KRIW.WW.Y.0005.260209T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 311 PM MST Sun Feb 8 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... * WHAT...Snow expected. Total snow accumulations of 6 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 50 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST Monday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur between 11 PM Sunday and 11 AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Myers Action: Continued Issued At: 2026-02-09 02:18:49 391 WWUS45 KRIW 090818 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 118 AM MST Mon Feb 9 2026 WYZ002-100000- /O.EXB.KRIW.WW.Y.0005.260209T0900Z-260210T0000Z/ Absaroka Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches. The highest elevations of the southwest Absaroka Mountains could see totals up to 15 inches. Wind gusts of 30 to 45 mph with occasional gusts as high as 50 mph. * WHERE...Absaroka Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...Snow accumulations of 6 inches or greater will likely be confined to elevations above 8,500 FT ASL. Snow accumulations of 0.5 to 4 inches for elevations below 8,500 ft ASL. The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible across higher terrain. 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 . && $$ WYZ001-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches south and east of the Lower Loop of Yellowstone National Park. Isolated higher amounts up to 16 inches are possible over the highest terrain. Total accumulations of 3 to 7 inches along the Upper Loop and northern portions of the Lower Loop. Accumulations of 1 to 3 inches near Mammoth. Gusty 20 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible, especially over higher terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ012-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 5 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 50 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. 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 . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Gerhardt Action: Time and Area Extended Issued At: 2026-02-09 02:18:49 391 WWUS45 KRIW 090818 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 118 AM MST Mon Feb 9 2026 WYZ002-100000- /O.EXB.KRIW.WW.Y.0005.260209T0900Z-260210T0000Z/ Absaroka Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches. The highest elevations of the southwest Absaroka Mountains could see totals up to 15 inches. Wind gusts of 30 to 45 mph with occasional gusts as high as 50 mph. * WHERE...Absaroka Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...Snow accumulations of 6 inches or greater will likely be confined to elevations above 8,500 FT ASL. Snow accumulations of 0.5 to 4 inches for elevations below 8,500 ft ASL. The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible across higher terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ001-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches south and east of the Lower Loop of Yellowstone National Park. Isolated higher amounts up to 16 inches are possible over the highest terrain. Total accumulations of 3 to 7 inches along the Upper Loop and northern portions of the Lower Loop. Accumulations of 1 to 3 inches near Mammoth. Gusty 20 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible, especially over higher terrain. 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 . && $$ WYZ012-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 5 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 50 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Gerhardt Action: Continued Issued At: 2026-02-09 02:18:49 391 WWUS45 KRIW 090818 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 118 AM MST Mon Feb 9 2026 WYZ002-100000- /O.EXB.KRIW.WW.Y.0005.260209T0900Z-260210T0000Z/ Absaroka Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches. The highest elevations of the southwest Absaroka Mountains could see totals up to 15 inches. Wind gusts of 30 to 45 mph with occasional gusts as high as 50 mph. * WHERE...Absaroka Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...Snow accumulations of 6 inches or greater will likely be confined to elevations above 8,500 FT ASL. Snow accumulations of 0.5 to 4 inches for elevations below 8,500 ft ASL. The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible across higher terrain. 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 . && $$ WYZ001-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 6 to 11 inches south and east of the Lower Loop of Yellowstone National Park. Isolated higher amounts up to 16 inches are possible over the highest terrain. Total accumulations of 3 to 7 inches along the Upper Loop and northern portions of the Lower Loop. Accumulations of 1 to 3 inches near Mammoth. Gusty 20 to 35 mph winds are expected. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates up to 1 inch per hour possible, especially over higher terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ012-100000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Teton and Gros Ventre Mountains- 118 AM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * WHAT...Snow expected. Total snow accumulations of 5 to 12 inches, including over Togwotee and Teton Passes. Locally higher amounts up to 18 inches are possible across the highest terrain of the Tetons. Widespread wind gusts of 20 to 35 mph with the higher terrain of the Tetons seeing gusts up to 50 mph. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The period of heaviest snowfall is forecast to occur through 11 AM Monday with snow rates of 0.5 inch per hour to 1 inch per hour possible. 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 . && $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . Gerhardt Action: Expired Issued At: 2026-02-09 17:49:37 841 WWUS45 KRIW 092349 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 449 PM MST Mon Feb 9 2026 WYZ001-002-012-100100- /O.EXP.KRIW.WW.Y.0005.000000T0000Z-260210T0000Z/ Yellowstone National Park-Absaroka Mountains-Teton and Gros Ventre Mountains- Including the cities of Old Faithful, Lake, and Mammoth 449 PM MST Mon Feb 9 2026 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS AFTERNOON... A brief period of moderate to heavy snow will remain possible over the Tetons for the next hour or two. Otherwise, the threat for snow has ended across the area. Thus, the advisory will be allowed to end. $$ For more information from the National Weather Service, visit https://weather.gov/riw/ . 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