WWA Summary for Winter Storm Warning Issued by BYZ

Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE
National Weather Service Billings MT
142 AM MST Wed Dec 10 2025

MTZ067-110000-
/O.CON.KBYZ.WS.W.0018.000000T0000Z-251211T0000Z/
Absaroka/Beartooth Mountains-
Including the locations of Cooke City
142 AM MST Wed Dec 10 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Periods of heavy snow. Additional snow accumulations of 5 to
  10 inches, greatest on west aspects. Winds gusting as high as 55
  mph.

* WHERE...Absaroka/Beartooth Mountains.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Recreation in the high country will be impacted by heavy
  accumulating snow and significant blowing snow. Whiteout conditions
  are possible over the highest elevations. Avalanche danger will
  increase.

* ADDITIONAL DETAILS...Additional periods of snow possible Thursday
  into Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Outdoor activities in the mountains will be impacted by harsh winter
conditions, so be prepared.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
337 AM MST Wed Dec 10 2025

WYZ001-002-110000-
/O.CON.KRIW.WS.W.0013.000000T0000Z-251211T0000Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
337 AM MST Wed Dec 10 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Heavy snow. Additional snow accumulations up to 6 inches.
  Winds gusting as high as 65 mph.

* WHERE...Absaroka Mountains and Yellowstone National Park.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Travel could be very difficult across Yellowstone Park
  and along Chief Joseph Highway. Significant blowing and drifting
  of snow is expected. Backcountry travel is not advised.

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 .

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
337 AM MST Wed Dec 10 2025

WYZ012-110000-
/O.CON.KRIW.WS.W.0013.000000T0000Z-251211T0000Z/
Teton and Gros Ventre Mountains-
337 AM MST Wed Dec 10 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Heavy snow. Additional snow accumulations up to 6 inches.
  Winds gusting as high as 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 travel across Teton and Togwotee Passes Tuesday and
  Wednesday. Blowing and drifting of snow is expected. Backcountry
  travel is not advised.

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 .

&&

$$