WWUS45 KRIW 180241 WSWRIW URGENT - WINTER WEATHER MESSAGE National Weather Service Riverton WY 741 PM MST Mon Feb 17 2025 WYZ001-182300- /O.CON.KRIW.WS.W.0006.000000T0000Z-250219T0600Z/ Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 741 PM MST Mon Feb 17 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST TUESDAY... * WHAT...Heavy snow expected. Additional snow accumulations between 6 and 12 inches in southern and eastern portions of the Park with 12 to 18 additional inches of additional snow accumulation possible in the Pitchstone Plateau. 1 to 3 additional inches in Mammoth; generally 2 to 4 additional inches elsewhere. * WHERE...Yellowstone National Park. * WHEN...Until 11 PM MST Tuesday. * IMPACTS...Travel will be difficult, especially in the backcountry. 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 . && $$ WYZ002-182300- /O.CON.KRIW.WS.W.0006.000000T0000Z-250219T0600Z/ Absaroka Mountains- 741 PM MST Mon Feb 17 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST TUESDAY... * WHAT...Heavy snow expected. Additional snow accumulations between 5 and 10 inches across western portions of the Absaroka Mountains. Elsewhere, additional snow accumulations of 2 to 5 inches. * WHERE...Absaroka Mountains. * WHEN...Until 11 PM MST Tuesday. * IMPACTS...Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ012-024-182300- /O.CON.KRIW.WS.W.0006.000000T0000Z-250219T0600Z/ Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges- 741 PM MST Mon Feb 17 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST TUESDAY... * WHAT...Heavy snow expected. Additional snow accumulations between 12 and 20 in the Tetons; 6 to 12 inches in the Salt and Wyoming Range. * WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming Ranges. * WHEN...Until 11 PM MST Tuesday. * IMPACTS...Travel will be very difficult, especially across Teton and Togwotee Passes. 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 . && $$ WYZ003-005-006-182300- /O.EXB.KRIW.WW.Y.0010.250218T1200Z-250219T0000Z/ Cody Foothills-Southwest Bighorn Basin-Southeast Bighorn Basin- Including the cities of Meeteetse, Ten Sleep, Cody, Worland, Clark, and Thermopolis 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 5 PM MST TUESDAY... * WHAT...Snow expected. Total snow accumulations up to 2 to 4 inches. Locally higher amounts to 6 inches where snow bands set up. * WHERE...Southwest Bighorn Basin, Southeast Bighorn Basin, and Cody Foothills. * WHEN...From 5 AM to 5 PM MST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning and evening commutes. * ADDITIONAL DETAILS...Snow bands will be very narrow, with rapidly changing weather conditions when the snow bands move through. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ004-182300- /O.CON.KRIW.WW.Y.0010.000000T0000Z-250219T0000Z/ North Bighorn Basin- Including the cities of Basin, Lovell, Powell, Greybull, and Shell 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST TUESDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches along and east of a line from Frannie to Burlington. Locally higher amounts up to a foot possible (20%) where snow bands set up. Generally 1 to 2 inches elsewhere. * WHERE...North Bighorn Basin. * WHEN...Until 5 PM MST Tuesday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...Snow bands will be very narrow, with rapidly changing weather conditions when the snow bands move through. 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 . && $$ WYZ008-182300- /O.CON.KRIW.WW.Y.0010.000000T0000Z-250219T0000Z/ Bighorn Mountains West- 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST TUESDAY... * WHAT...Snow expected. Additional snow accumulations of 4 to 8 inches north of Highway 16; 2 to 4 inches south of Highway 16. * WHERE...Bighorn Mountains West. * WHEN...Until 5 PM MST Tuesday. * IMPACTS...Travel could be very difficult, including over Granite Pass and Powder River Pass. * ADDITIONAL DETAILS...Snow bands will be very narrow, with rapidly changing weather conditions when the snow bands move through. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ013-023-181200- /O.CON.KRIW.WW.Y.0010.000000T0000Z-250218T1200Z/ Jackson Hole-Star Valley- Including the cities of Afton, Jackson, Alpine, Star Valley Ranch, and Thayne 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * WHAT...Snow. Additional snow accumulations up to 3 inches. * WHERE...Jackson Hole and Star Valley. * WHEN...Until 5 AM MST Tuesday. * IMPACTS...Travel could be difficult. 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 . && $$ WYZ014-182300- /O.CON.KRIW.WW.Y.0010.000000T0000Z-250219T0000Z/ Wind River Mountains West- 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST TUESDAY... * WHAT...Snow. Additional snow accumulations between 3 and 8 inches. Additional accumulations between 1 and 3 inches along Highway 28 over South Pass. Winds gusting as high as 40 mph. * WHERE...Wind River Mountains West. * WHEN...Until 5 PM MST Tuesday. * IMPACTS...Travel could be difficult, including over South Pass. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info . && $$ WYZ025-181200- /O.CON.KRIW.WW.Y.0010.000000T0000Z-250218T1200Z/ Upper Green River Basin Foothills- Including the cities of Pinedale 741 PM MST Mon Feb 17 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * WHAT...Snow expected. Additional snow accumulations between 1 and 3 inches northwest of Cora, including the Bondurant area. Elsewhere, additional accumulations up to an inch. * WHERE...Upper Green River Basin Foothills. * WHEN...Until 5 AM MST Tuesday. * IMPACTS...Travel could be difficult. 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/ . Rowe