WWUS45 KRIW 271756

WSWRIW



URGENT - WINTER WEATHER MESSAGE

National Weather Service Riverton WY

1156 AM MDT Mon Oct 27 2025



WYZ001-271900-

/O.CAN.KRIW.WS.W.0011.000000T0000Z-251028T0000Z/

Yellowstone National Park-

Including the cities of Mammoth, Lake, and Old Faithful

1156 AM MDT Mon Oct 27 2025



...WINTER STORM WARNING IS CANCELLED...



Snow will continue to decrease across Yellowstone National Park. 

Thus, the Winter Storm Warning has been cancelled. However, light 

snow remains possible at times through the afternoon. Additional 

accumulations are expected to be light.



$$



WYZ002-014-015-024-271900-

/O.EXP.KRIW.WW.Y.0029.000000T0000Z-251027T1800Z/

Absaroka Mountains-Wind River Mountains West-Wind River Mountains

East-Salt River and Wyoming Ranges-

1156 AM MDT Mon Oct 27 2025



...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MDT TODAY...



Snow has decreased across the area and the Winter Weather Advisory 

will expire at noon. However, light snow remains possible at times 

through the afternoon. Additional accumulations are expected to be 

light.



$$



WYZ012-280000-

/O.CON.KRIW.WS.W.0011.000000T0000Z-251028T0000Z/

Teton and Gros Ventre Mountains-

1156 AM MDT Mon Oct 27 2025



...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS 

EVENING...



* WHAT...Heavy snow at times. Additional snow accumulations up to 

  three inches. Winds gusting as high as 35 mph.



* WHERE...Teton and Gros Ventre Mountains.



* WHEN...Until 6 PM MDT this evening.



* 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 .



&&



$$



WYZ008-280000-

/O.CON.KRIW.WW.Y.0029.000000T0000Z-251028T0000Z/

Bighorn Mountains West-

1156 AM MDT Mon Oct 27 2025



...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS 

EVENING...



* WHAT...Snow. Additional snow accumulations up to two inches.



* WHERE...Bighorn Mountains West.



* WHEN...Until 6 PM MDT this evening.



* IMPACTS...Travel could be difficult along mountain roads, 

  including over Powder River Pass on Highway 16 and Granite Pass on 

  Highway 14.



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