Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Billings MT
132 AM MST Tue Dec 9 2025
MTZ067-100845-
/O.CON.KBYZ.WS.W.0018.000000T0000Z-251211T0000Z/
Absaroka/Beartooth Mountains-
Including the locations of Cooke City
132 AM MST Tue Dec 9 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY...
* WHAT...Periods of heavy snow. Additional snow accumulations of 10
to 18 inches, greatest on west aspects. Winds gusting as high as 75
mph.
* WHERE...Absaroka/Beartooth Mountains.
* WHEN...Until 5 PM MST Wednesday.
* 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 moderate to heavy snow
possible Thursday and Friday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Outdoor activities in the mountains will be impacted by harsh winter
conditions, so be prepared.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
121 PM MST Mon Dec 8 2025
WYZ001-002-091300-
/O.CON.KRIW.WS.W.0013.251209T0000Z-251211T0000Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Lake, Mammoth, and Old Faithful
121 PM MST Mon Dec 8 2025
...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM MST WEDNESDAY...
* WHAT...Heavy snow expected. Total snow accumulations between 10
and 20 inches, with the highest amounts in the western Absarokas
and southwestern Yellowstone Park. Northern Yellowstone Park will
see 6 to 10 inches of snow with much lower amounts, less than 3
inches at Mammoth. Winds gusting as high as 60 to 70 mph across
the ridgetops.
* WHERE...Absaroka Mountains and Yellowstone National Park.
* WHEN...From 5 PM this afternoon to 5 PM MST Wednesday.
* IMPACTS...Travel could be very difficult across Yellowstone Park
and along Chief Joseph Highway. Significant blowing and drifting
of snow is expected. Backcountry travel is not advised.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
121 PM MST Mon Dec 8 2025
WYZ012-091300-
/O.UPG.KRIW.WS.A.0010.251209T1200Z-251211T0000Z/
/O.EXB.KRIW.WS.W.0013.251209T1200Z-251211T0000Z/
Teton and Gros Ventre Mountains-
121 PM MST Mon Dec 8 2025
...WINTER STORM WARNING IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...Heavy snow expected. Total snow accumulations generally 1
to 2 feet. Winds gusting as 50 to 60 mph, with strongest winds
occurring Tuesday night through Wednesday morning.
* WHERE...Teton and Gros Ventre Mountains, including Teton Pass and
Togwotee Pass.
* WHEN...From 5 AM Tuesday to 5 PM MST Wednesday.
* 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 .
&&
$$
High Wind Warning
URGENT - WEATHER MESSAGE
National Weather Service Billings MT
125 AM MST Tue Dec 9 2025
MTZ065-066-091800-
/O.CON.KBYZ.HW.W.0013.000000T0000Z-251209T1800Z/
Livingston Area-Beartooth Foothills-
Including the locations of Fishtail, Livingston, Dean, Nye,
Limestone, and Mc Leod
125 AM MST Tue Dec 9 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
* WHAT...Southwest winds gusting 70 to 80 mph.
* WHERE...Beartooth Foothills and Livingston Area.
* WHEN...Until 11 AM MST this morning.
* IMPACTS...Strong crosswinds will make travel hazardous along
Interstate 90 from Livingston to Big Timber and roads along the
Beartooth Foothills. Gusty winds will blow around unsecured
objects.
* ADDITIONAL DETAILS...Strongest wind gusts are expected to occur
through early this morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution and consider postponing travel
until winds subside, or take an alternate route.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Billings MT
125 AM MST Tue Dec 9 2025
MTZ067-068-091800-
/O.CON.KBYZ.HW.W.0013.000000T0000Z-251209T1800Z/
Absaroka/Beartooth Mountains-Crazy Mountains-
Including the locations of Silver Gate, Cooke City, Alpine, Mystic
Lake, and Jardine
125 AM MST Tue Dec 9 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
* WHAT...West winds gusting to 80 mph.
* WHERE...Absaroka/Beartooth Mountains and Crazy Mountains.
* WHEN...Until 11 AM MST this morning.
* IMPACTS...Outdoor recreation will be impacted by very strong wind
gusts and areas of blowing snow.
* ADDITIONAL DETAILS...Increased avalanche danger is possible.
Strongest gusts are expected early this morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Use extreme caution if you plan to be outdoors in the high country.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
824 PM MST Mon Dec 8 2025
MTZ305-306-310-311-314-317-318-320-321-091230-
/O.CON.KTFX.HW.W.0029.000000T0000Z-251209T2200Z/
Hill County-Northern Blaine County-Western and Central Chouteau
County-Bears Paw Mountains and Southern Blaine-Fergus County
below 4500ft-Little Belt and Highwood Mountains-Snowy and Judith
Mountains-Big Belt, Bridger and Castle Mountains-Meagher County
Valleys-
Including the following locations: Fort Belknap, Ringling,
Martinsdale, Havre, Chinook, Carter, Bozeman Pass, White Sulphur
Springs, Neihart, Fort Benton, Checkerboard, Hogeland, Hilger,
Trident, Harlem, Zurich, Deep Creek Pass, Kings Hill Pass, Battle
Ridge Pass, Monarch, Floweree, Rocky Boy, Lewistown, and Maudlow
824 PM MST Mon Dec 8 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 3 PM MST TUESDAY...
* WHAT...Westerly winds 30 to 40 mph, with gusts up to 65 mph
expected.
* WHERE...Bears Paw, Highwood, Little Belt, and Snowy Mountains,
Hill County, Northern Blaine County, Western and Central Chouteau
County, Fergus County below 4500ft, Big Belt, Bridger and Castle
Mountains, and Meagher County Valleys.
* WHEN...Until 3 PM MST Tuesday.
* IMPACTS...Travel could be difficult, especially for high profile
vehicles.
* ADDITIONAL DETAILS...Peak wind gusts late Monday night into
Tuesday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remember, a High Wind Warning means that there is at least an 80%
chance of 40 mph sustained winds or 58 mph wind gusts occurring
during the warning period.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
824 PM MST Mon Dec 8 2025
MTZ325-091230-
/O.CON.KTFX.HW.W.0029.000000T0000Z-251209T1700Z/
Madison River Valley-
Including the following locations: McAllister, Norris, Jeffers,
Ennis, and Cameron
824 PM MST Mon Dec 8 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY...
* WHAT...Southerly winds 30 to 40 mph with gusts up to 60 mph.
* WHERE...Madison River Valley.
* WHEN...Until 10 AM MST Tuesday.
* IMPACTS...Travel could be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remember, a High Wind Warning means that there is at least an 80%
chance of 40 mph sustained winds or 58 mph wind gusts occurring
during the warning period.
&&
$$
RG
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1254 PM MST Mon Dec 8 2025
WYZ019-020-022-027>030-091300-
/O.CON.KRIW.HW.W.0013.251209T0600Z-251211T1200Z/
Green Mountains and Rattlesnake Range-Natrona County Lower
Elevations-Casper Mountain-South Lincoln County-Rock Springs and
Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Kemmerer, Cokeville, Green River, Casper,
Wamsutter, Rock Springs, and Jeffrey City
1254 PM MST Mon Dec 8 2025
...HIGH WIND WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5
AM MST THURSDAY...
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph expected.
Localized gusts up to 70 to 75 mph possible.
* WHERE...Casper Mountain, Green Mountains and Rattlesnake Range,
Natrona County Lower Elevations, Sweetwater County and South
Lincoln County. Strongest winds are expected along South Pass and
higher peaks of the Green Mountains and Rattlesnake Range.
* WHEN...From 11 PM this evening to 5 AM MST Thursday.
* IMPACTS...Travel will be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Use caution if you must drive. Secure loose objects.
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Hensley
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
121 PM MST Mon Dec 8 2025
WYZ024-091300-
/O.UPG.KRIW.WS.A.0010.251209T1200Z-251211T0000Z/
/O.NEW.KRIW.WW.Y.0036.251209T1200Z-251211T0000Z/
Salt River and Wyoming Ranges-
121 PM MST Mon Dec 8 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...Snow expected. Total snow accumulations of 6 to 12 inches.
Winds gusting as high as 60 mph.
* WHERE...Salt River and Wyoming Ranges.
* WHEN...From 5 AM Tuesday to 5 PM MST Wednesday.
* IMPACTS...Travel could be very difficult including over Salt River
Pass. Backcountry travel is not advised.
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 .
&&
$$
Flood Watch
Flood Watch
National Weather Service Missoula MT
1253 PM MST Mon Dec 8 2025
.Near-record precipitation is possible this week as two Atmospheric
Rivers will move through the region. The first one arrives today and
continues through Tuesday, followed by a second, stronger one
Tuesday night through Thursday. Between 4 and 10 inches of moderate
to heavy rain are expected in the mountains. For some locations,
near record rainfall amounts are possible. The rain, falling on the
current snowpack, combined with mild nighttime temperatures will
increase snowmelt. Flows in rivers may increase quickly and reach
critical levels.
IDC035-049-092115-
/O.EXT.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clearwater-Idaho-
1253 PM MST Mon Dec 8 2025 /1153 AM PST Mon Dec 8 2025/
...FLOOD WATCH NOW IN EFFECT FROM 5 PM MST /4 PM PST/ THIS AFTERNOON
THROUGH THURSDAY AFTERNOON...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...Portions of central and panhandle Idaho, including the
following counties, in central Idaho, Idaho. In panhandle Idaho,
Clearwater.
* WHEN...From 5 PM MST /4 PM PST/ this afternoon through Thursday
afternoon.
* IMPACTS...Creeks and streams may rise out of their banks. Flooding
may occur in poor drainage and urban areas. Storm drains and
ditches may become clogged with debris. People, structures, and
roads located below steep slopes, in canyons, and near the mouths
of canyons may be at risk from landslides.
* ADDITIONAL DETAILS...
- A prolonged atmospheric river is expected to bring periods of
heavy rain to Idaho and Clearwater Counties, Monday night
through Thursday. Rising snow levels will lead to a rain on
snow event for elevations below 7,000 feet Monday night into
Tuesday morning. The precipitation rates will briefly
decrease Tuesday afternoon, before a second surge of moisture
arrives Tuesday night into Thursday morning with snow levels
rising to near 8,000 feet. By Thursday, significant
precipitation totals are forecast, with 2 to 5 inches in the
valleys and 5 to 10 inches in the mountains, with locally
higher totals over mountain crests. Landslides in areas of
steep terrain and minor flooding in urban and poor drainage
areas is possible.
- https://www.weather.gov/mso/hydrology
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop. Monitor basements for water
intrusion. You may want to preemptively shovel snow away from your
home.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
248 AM MST Tue Dec 9 2025
WYZ001>020-022>030-101400-
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-
248 AM MST Tue Dec 9 2025
...WINTER STORM WARNINGS REMAIN IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM MST WEDNESDAY...
...HIGH WIND WARNING IN EFFECT THROUGH WEDNESDAY EVENING...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Moderate to heavy snowfall continues for western mountains. Please
see Winter Weather Products and forecasts for details.
Strong to high wind developing from Kemmerer through Rock Springs
and into Natrona County. Please see High Wind Warnings for
details.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday and Thursday...Snow likely in the western and northern
mountains. Strong to high wind continuing in southern Wyoming.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hydrologic Outlook
Hydrologic Outlook
MTC039-063-081-102100-
Hydrologic Outlook
National Weather Service Missoula MT
122 PM MST Mon Dec 8 2025
...NEAR RECORD HEAVY PRECIPITATION TO BRING SMALL STREAM RISES, RISK
FOR ROCK AND LANDSLIDES, AND MINOR FLOODING THIS WEEK...
A prolonged atmospheric river is expected to bring periods of heavy
rain for western Montana Monday night through Thursday. Rising snow
levels will lead to a rain-on-snow event for elevations below 7,000
feet Monday night into Tuesday morning. Precipitation rates will
briefly decrease Tuesday afternoon before a second surge of moisture
arrives Tuesday night into Thursday. During the second surge, snow
levels will be lower initially, ranging from 3,500 to 5,000 feet
with some slushy snow accumulations across northwest Montana
valleys, but will then rise to 6,000 to 8,000 feet Wednesday into
Thursday. By Thursday, significant precipitation totals are
forecast, with 1 to 4 inches in the valleys and 5 to 8 inches in the
mountains, with locally higher totals over mountain crests.
Landslides in areas of steep terrain and minor flooding in urban and
poor-drainage areas are possible. Storm drains and ditches may
become clogged with debris. You may want to preemptively shovel snow
away from your homes. Watch basements for moisture intrusion.
$$
