Winter Storm Warning
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.
&&
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
237 AM MST Thu Dec 4 2025
WYZ001-002-008-013-014-023-025-050000-
/O.NEW.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/
Yellowstone National Park-Absaroka Mountains-Bighorn Mountains
West-Jackson Hole-Wind River Mountains West-Star Valley-Upper
Green River Basin Foothills-
Including the cities of Afton, Thayne, Old Faithful, Jackson,
Alpine, Mammoth, Star Valley Ranch, Lake, and Pinedale
237 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 2
PM MST SATURDAY...
* WHAT...Snow expected. Total snow accumulations of 6 to 10 inches
for Jackson Valley, Star Valley, and the Upper Green River Basin.
Total snow accumulations of 8 to 12 inches across Yellowstone
National Park, the Absarokas, western Wind River Mountains, and
the northern portions of the western Bighorns are expected with
the highest elevations potentially seeing up to 20 inches. Winds
gusts between 30 and 40 mph will be common across the Absarokas
with isolated gusts above 45 mph.
* WHERE...Portions of central, north central, northwest, and west
central Wyoming.
* WHEN...From 5 PM this afternoon to 2 PM MST Saturday.
* IMPACTS...Travel could become very difficult, including through
Hoback Canyon. 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 look to
accompany the heavy snowfall which may create reduced visibility
and drifting snow.
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/ .
Gerhardt
URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
1142 PM PST Wed Dec 3 2025
...LONG DURATION SNOW EVENT FOR CENTRAL PANHANDLE MOUNTAINS THURSDAY
THROUGH SATURDAY...
.Multiple weather system will bring snow to the Central Panhandle
Mountains beginning Thursday and continuing through Saturday. The
first round of snow on Thursday will bring light accumulations to
the valleys and moderate accumulations to the mountains. Subsequent
rounds Friday into the weekend will come with rising snow levels
with the potential for heavy snow above 3000 feet.
IDZ004-050000-
/O.CON.KOTX.WW.Y.0032.251204T1500Z-251205T1200Z/
/O.CON.KOTX.WS.A.0004.251205T1200Z-251207T0000Z/
Central Panhandle Mountains-
Including the cities of Osburn, Wallace, Mullan, Dobson Pass,
Lookout Pass, Fourth Of July Pass, St. Maries, Pinehurst,
Fernwood, and Kellogg
1142 PM PST Wed Dec 3 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM THURSDAY TO 4
AM PST FRIDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH SATURDAY AFTERNOON FOR ELEVATIONS ABOVE 3000 FEET...
* WHAT...For the Winter Weather Advisory, snow expected. Total snow
accumulations up to 2 inches valleys and 4 to 8 inches in the
mountains Thursday and Thursday night. For the Winter Storm Watch
for elevations above 3000 feet, heavy snow possible Friday through
Saturday. Total snow accumulations of 5 to 13 inches possible.
* WHERE...Osburn, Wallace, Mullan, Dobson Pass, Lookout Pass, Fourth
Of July Pass, St. Maries, Pinehurst, Fernwood, and Kellogg.
* WHEN...For the Winter Weather Advisory, from 7 AM Thursday to 4 AM
PST Friday. For the Winter Storm Watch, from late Thursday night
through Saturday afternoon.
* IMPACTS...Winter travel conditions expected.
* ADDITIONAL DETAILS...Snow will become heavy at times Friday
through Saturday over Lookout Pass.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For the latest road
information in Idaho, call 5 1 1.
Monitor the latest forecasts for updates on this situation.
&&
$$
JW
Winter Storm Watch
URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
219 AM MST Thu Dec 4 2025
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES
THROUGH THE SATURDAY...
.A series of winter storms will begin to push into North Central and
Southwestern Montana today, with snow beginning over the higher
terrain early this afternoon. Today`s snowfall will focus on the
Mountains of Central and South-Central Montana, with 4 to 8 inches
over both Kings Hill and Bozeman Passes today, with higher amounts
above pass level. A period of lighter snowfall is expected Friday
morning and afternoon, with more widespread heavy snow returning to
the area around sunset Friday. Snow will continue across the area
Friday night into Saturday evening, with an additional 6 to 12
inches expected over the passes and higher amounts above pass level.
MTZ301-307-327-050030-
/O.CON.KTFX.WS.A.0018.251205T1200Z-251207T0000Z/
East Glacier Park Region-Southern Rocky Mountain Front-Northwest
Beaverhead County-
Including the following locations: Saint Mary, East Glacier Park,
Logan Pass, Kiowa, Marias Pass, Rogers Pass, Wisdom, Babb, Chief
Joseph Pass, Wise River, Big Hole Pass, and Dewey
219 AM MST Thu Dec 4 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SATURDAY AFTERNOON...
* WHAT...Heavy snow possible. Total snow accumulations between 6 and
12 inches possible. Winds could gust as high as 40 mph.
* WHERE...The Continental Divide along the Rocky Mountain Front, and
Northwest Beaverhead County.
* WHEN...From late tonight through Saturday afternoon.
* IMPACTS...Travel could be very difficult and tire chains may be
required for some vehicles. Those in the backcountry should ensure
they are prepared for dangerous conditions.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
Ludwig
URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
1142 PM PST Wed Dec 3 2025
...LONG DURATION SNOW EVENT FOR CENTRAL PANHANDLE MOUNTAINS THURSDAY
THROUGH SATURDAY...
.Multiple weather system will bring snow to the Central Panhandle
Mountains beginning Thursday and continuing through Saturday. The
first round of snow on Thursday will bring light accumulations to
the valleys and moderate accumulations to the mountains. Subsequent
rounds Friday into the weekend will come with rising snow levels
with the potential for heavy snow above 3000 feet.
IDZ004-050000-
/O.CON.KOTX.WW.Y.0032.251204T1500Z-251205T1200Z/
/O.CON.KOTX.WS.A.0004.251205T1200Z-251207T0000Z/
Central Panhandle Mountains-
Including the cities of Osburn, Wallace, Mullan, Dobson Pass,
Lookout Pass, Fourth Of July Pass, St. Maries, Pinehurst,
Fernwood, and Kellogg
1142 PM PST Wed Dec 3 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM THURSDAY TO 4
AM PST FRIDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT
THROUGH SATURDAY AFTERNOON FOR ELEVATIONS ABOVE 3000 FEET...
* WHAT...For the Winter Weather Advisory, snow expected. Total snow
accumulations up to 2 inches valleys and 4 to 8 inches in the
mountains Thursday and Thursday night. For the Winter Storm Watch
for elevations above 3000 feet, heavy snow possible Friday through
Saturday. Total snow accumulations of 5 to 13 inches possible.
* WHERE...Osburn, Wallace, Mullan, Dobson Pass, Lookout Pass, Fourth
Of July Pass, St. Maries, Pinehurst, Fernwood, and Kellogg.
* WHEN...For the Winter Weather Advisory, from 7 AM Thursday to 4 AM
PST Friday. For the Winter Storm Watch, from late Thursday night
through Saturday afternoon.
* IMPACTS...Winter travel conditions expected.
* ADDITIONAL DETAILS...Snow will become heavy at times Friday
through Saturday over Lookout Pass.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For the latest road
information in Idaho, call 5 1 1.
Monitor the latest forecasts for updates on this situation.
&&
$$
JW
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
126 PM MST Wed Dec 3 2025
IDZ005-006-MTZ002-004-006-043-051200-
/O.NEW.KMSO.WS.A.0010.251205T1200Z-251207T0000Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-West
Glacier Region-Lower Clark Fork Region-Bitterroot/Sapphire
Mountains-Potomac/Seeley Lake Region-
126 PM MST Wed Dec 3 2025 /1226 PM PST Wed Dec 3 2025/
...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH
SATURDAY AFTERNOON...
* WHAT...Heavy mixed precipitation possible. There is a chance of
moderate to major winter weather impacts. Total snow accumulations
of 3 to 7 inches along valley bottoms, 7 to 15 inches at mountain
pass level, and 24 to 36 inches along mountain crests. Ice
accumulations around a light glaze possible.
* WHERE...In IDAHO, Northern Clearwater Mountains and Southern
Clearwater Mountains. In MONTANA, West Glacier Region,
Bitterroot/Sapphire Mountains, Lower Clark Fork Region, and
Potomac/Seeley Lake Region.
* WHEN...From late Thursday night through Saturday afternoon.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Friday morning and evening
commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
1259 PM MST Wed Dec 3 2025
IDZ058>066-042000-
/O.CON.KPIH.WS.A.0006.251205T0000Z-251206T1200Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-Bear
River Range-Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains - Island
Park-
Including the cities of Kilgore, Malad, Preston, Bone,
Montpelier, Henry, Victor, Grace, Inkom, Driggs, Thatcher, Lava
Hot Springs, Georgetown, Swan Valley, Island Park, Ashton,
Emigration Summit, Downey, St. Charles, McCammon, Wayan, Tetonia,
and Soda Springs
1259 PM MST Wed Dec 3 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...
* WHAT...Heavy snow possible. Total snow accumulations between 8 and
14 inches in the mountains and 4 to 8 inches in the valleys
possible. Winds could gust as high as 35 mph.
* WHERE...Big Hole Mountains, Centennial Mountains - Island Park,
Teton Valley, Bear Lake Valley, Bear River Range, Blackfoot
Mountains, Caribou Range, Franklin/Eastern Oneida Region, and
Marsh and Arbon Highlands.
* WHEN...From Thursday afternoon through late Friday night.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Friday morning and evening
commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
Visit weather.gov/pocatello for more information.
GK
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
129 AM MST Wed Dec 3 2025
WYZ001>020-022>030-041230-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
129 AM MST Wed Dec 3 2025
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Areas of blowing snow possible across Interstate 80 through the
morning, as winds subside.
Winds gusts of 35 to 50 mph will be possible late tonight north of
Cody and the Upper Wind River Basin.
Areas of fog will develop over portions of Yellowstone NP tonight,
and possibly spreading into northern portions of the Jackson Valley.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday through Saturday night...Periods of snow will begin over
northwestern portions Thursday afternoon and spreading to far western
portions Thursday night. A break in the snow is possible Friday
afternoon, before starting again Friday night and ending late
Saturday night. Snowfall amounts of 1 to 2 feet is possible in the
western mountains and amounts approaching 12 inches in the
Jackson/Star Valleys over this 3 day period.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
