WWA Summary for Winter Storm Warning

Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
517 AM MST Thu Dec 4 2025

WYZ012-024-050330-
/O.CON.KRIW.WS.W.0012.251205T0000Z-251206T2100Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
517 AM MST Thu Dec 4 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 2 PM MST SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 20
  inches across much of the area with the highest elevations seeing
  2 to 3 feet. Gusty winds of 25 to 40 mph will be common. Higher
  elevations of the Salt River and Wyoming Ranges could gust above
  45 mph.

* WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming
  Ranges.

* WHEN...From 5 PM this afternoon to 2 PM MST Saturday.

* IMPACTS...Travel could be very difficult, especially over Teton,
  Togwotee, and Salt River Passes. The hazardous conditions could
  impact the Friday morning and evening commutes.

* ADDITIONAL DETAILS...A brief lull in snowfall rates may occur
  during the day Friday with the heaviest snowfall likely to arrive
  Friday night through Saturday morning. Gusty winds of 20 to 30 mph
  look to accompany the heavy snowfall which may create reduced
  visibility and drifting snow.

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 Billings MT
343 AM MST Thu Dec 4 2025

MTZ067-068-051045-
/O.NEW.KBYZ.WS.W.0017.251204T2100Z-251206T2100Z/
Absaroka/Beartooth Mountains-Crazy Mountains-
Including the locations of Cooke City
343 AM MST Thu Dec 4 2025

...WINTER STORM WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 2 PM
MST SATURDAY...

* WHAT...Periods of moderate to heavy snow expected. Total snow
  accumulations between 12 and 24 inches, greatest on west facing
  slopes where locally higher amounts are possible. Winds gusting as
  high as 45 mph.

* WHERE...Absaroka/Beartooth Mountains and Crazy Mountains.

* WHEN...From 2 PM this afternoon to 2 PM MST Saturday.

* IMPACTS...Recreation in the backcountry will be impacted by heavy
  accumulating snow and blowing snow.

* ADDITIONAL DETAILS...Snowfall amounts on the northeast facing
  slopes around Nye to Red Lodge are much less, around 3 to 6 inches.

A temporary break in the snowfall is expected Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Those in the backcountry should ensure they are prepared for
dangerous winter conditions.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
219 AM MST Thu Dec 4 2025

...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES
THROUGH THE SATURDAY...

.A series of winter storms will begin to push into North Central and
Southwestern Montana today, with snow beginning over the higher
terrain early this afternoon. Today`s snowfall will focus on the
Mountains of Central and South-Central Montana, with 4 to 8 inches
over both Kings Hill and Bozeman Passes today, with higher amounts
above pass level. A period of lighter snowfall is expected Friday
morning and afternoon, with more widespread heavy snow returning to
the area around sunset Friday. Snow will continue across the area
Friday night into Saturday evening, with an additional 6 to 12
inches expected over the passes and higher amounts above pass level.

MTZ317-320-330-050030-
/O.UPG.KTFX.WS.A.0018.251205T0000Z-251206T1200Z/
/O.NEW.KTFX.WS.W.0019.251204T1800Z-251206T1200Z/
Little Belt and Highwood Mountains-Big Belt, Bridger and Castle
Mountains-Gallatin and Madison County Mountains and Centennial
Mountains-
Including the following locations: Maudlow, Bozeman Pass, Deep
Creek Pass, Raynolds Pass, Targhee Pass, Kings Hill Pass, Battle
Ridge Pass, Big Sky, West Yellowstone, Trident, Monarch, and
Neihart
219 AM MST Thu Dec 4 2025

...WINTER STORM WARNING IN EFFECT FROM 11 AM THIS MORNING TO 5 AM
MST SATURDAY...

* WHAT...Heavy snow expected. Snowfall totals of 4 to 8 inches at
  pass level through tonight with an additional 5 to 12 inches at
  and above pass level Friday and Saturday. Total snow accumulations
  between 10 and 20 inches. Winds gusting as high as 40 mph.

* WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and
  Highwood Mountains, and Gallatin and Madison County Mountains and
  Centennial Mountains.

* WHEN...From 11 AM this morning to 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult and tire chains may be
  required for some vehicles. Those in the backcountry should ensure
  they are prepared for dangerous conditions.

* ADDITIONAL DETAILS...Significant travel impacts to the Thursday
  and Friday commutes are possible for Bozeman Pass and along
  Highway 191 south of Bozeman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions can
be obtained by calling 5 1 1 or visiting the MDT Road Report website.

Remember, a Winter Storm Warning means that there is at least an 80%
chance of impactful winter weather conditions during the warning
period.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Gaylord MI
334 AM EST Thu Dec 4 2025

MIZ086-087-041800-
/O.CON.KAPX.WS.W.0014.000000T0000Z-251204T1800Z/
Western Chippewa-Central Chippewa-
334 AM EST Thu Dec 4 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* WHAT...Lake effect snow expected. Additional snow accumulations
  between 2 and 4 inches, locally higher amounts possible. Wind
  gusts up to 30 mph will result in blowing snow at times.

* WHERE...Central Chippewa and Western Chippewa Counties.

* WHEN...Until 1 PM EST this afternoon.

* IMPACTS...Visibilities will drop below 1/4 mile due to falling and
  blowing snow. Travel could be very difficult. The hazardous
  conditions will impact the Thursday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

If travel is absolutely necessary, drive with extreme caution and be
prepared for sudden changes in visibility. Leave plenty of room
between you and the motorist ahead of you, and allow extra time to
reach your destination. Avoid sudden braking or acceleration, and be
especially cautious on hills or when making turns. Make sure your
car is winterized and in good working order.

&&

$$

JLD

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
1225 AM MST Thu Dec 4 2025

WYZ112-114-050000-
/O.NEW.KCYS.WS.W.0011.251205T0600Z-251207T1200Z/
Sierra Madre Range-Snowy Range-
Including the cities of Albany and Centennial
1225 AM MST Thu Dec 4 2025

...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 AM
MST SUNDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 1 and
  2 feet. Higher amounts possible above 10000 feet. Winds gusting as
  high as 65 mph will lead to blowing snow and reduced visibility.

* WHERE...Sierra Madre Range and Snowy Range.

* WHEN...From 11 PM this evening to 5 AM MST Sunday.

* IMPACTS...Outdoor recreation could become life threatening to
  those caught unprepared for severe winter conditions. Hikers and
  snowmobilers may easily become disoriented. Frostbite and
  hypothermia can develop quickly. Widespread blowing snow could
  significantly reduce visibility and lead to dangerous travel
  conditions. Travel could be very difficult to impossible. Very
  strong winds could cause tree damage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

Fuller