WWUS45 KRIW 250707

WSWRIW



URGENT - WINTER WEATHER MESSAGE

National Weather Service Riverton WY

107 AM MDT Sat Oct 25 2025



WYZ001-260200-

/O.UPG.KRIW.WS.A.0008.251026T0500Z-251028T0000Z/

/O.NEW.KRIW.WS.W.0011.251026T0500Z-251028T0000Z/

Yellowstone National Park-

Including the cities of Old Faithful, Mammoth, and Lake

107 AM MDT Sat Oct 25 2025



...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 6 PM 

MDT MONDAY...



* WHAT...Heavy snow expected. Total snow accumulations between 6 and 

  12 inches, with higher amounts up to 15 inches for the Southern 

  Entrance. Winds gusting as high as 45 mph.



* WHERE...Yellowstone National Park.



* WHEN...From 11 PM this evening to 6 PM MDT Monday.



* IMPACTS...Roads, and especially bridges and overpasses, will 

  likely become slick and hazardous. 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 .



&&



$$



WYZ012-260200-

/O.UPG.KRIW.WS.A.0008.251026T0500Z-251028T0000Z/

/O.NEW.KRIW.WS.W.0011.251026T0500Z-251028T0000Z/

Teton and Gros Ventre Mountains-

107 AM MDT Sat Oct 25 2025



...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 6 PM 

MDT MONDAY...



* WHAT...Heavy snow expected. Total snow accumulations between 10 

  and 18 inches. Winds gusting as high as 40 mph.



* WHERE...Teton and Gros Ventre Mountains.



* WHEN...From 11 PM this evening to 6 PM MDT Monday.



* IMPACTS...Roads, and especially bridges and overpasses, will 

  likely become slick and hazardous, especially across Teton and 

  Togwotee Passes. 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 .



&&



$$



For more information from the National Weather Service, visit 

https://weather.gov/riw/ .



Straub