Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
859 AM MST Tue Dec 9 2025
WYZ001-002-100200-
/O.CON.KRIW.WS.W.0013.000000T0000Z-251211T0000Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Mammoth, Lake, and Old Faithful
859 AM MST Tue Dec 9 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY...
* WHAT...Heavy snow. Additional snow accumulations between 10 and 20
inches, with the highest amounts in the western Absarokas and
southwestern Yellowstone Park. Northern Yellowstone Park will see
4 to 8 inches of snow with much lower amounts, less than 2 inches
at Mammoth. Winds gusting as high as 60 to 70 mph across the
ridgetops.
* WHERE...Absaroka Mountains and Yellowstone National Park.
* WHEN...Until 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 .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Billings MT
132 AM MST Tue Dec 9 2025
MTZ067-100845-
/O.CON.KBYZ.WS.W.0018.000000T0000Z-251211T0000Z/
Absaroka/Beartooth Mountains-
Including the locations of Cooke City
132 AM MST Tue Dec 9 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST WEDNESDAY...
* WHAT...Periods of heavy snow. Additional snow accumulations of 10
to 18 inches, greatest on west aspects. Winds gusting as high as 75
mph.
* WHERE...Absaroka/Beartooth Mountains.
* WHEN...Until 5 PM MST Wednesday.
* IMPACTS...Recreation in the high country will be impacted by heavy
accumulating snow and significant blowing snow. Whiteout conditions
are possible over the highest elevations. Avalanche danger will
increase.
* ADDITIONAL DETAILS...Additional periods of moderate to heavy snow
possible Thursday and Friday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Outdoor activities in the mountains will be impacted by harsh winter
conditions, so be prepared.
&&
$$
High Wind Warning
URGENT - WEATHER MESSAGE
National Weather Service Billings MT
1055 AM MST Tue Dec 9 2025
MTZ063-141-172-228-100000-
/O.CON.KBYZ.HW.W.0013.000000T0000Z-251210T0000Z/
Judith Gap-Northern Sweet Grass-Melville Foothills-Southern
Wheatland-
Including the locations of Melville, Judith Gap, Big Timber, and
Harlowton
1055 AM MST Tue Dec 9 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
* WHAT...West winds gusting to 65 mph.
* WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and
Northern Sweet Grass.
* WHEN...Until 5 PM MST this afternoon.
* IMPACTS...Strong crosswinds will make travel difficult along
Highway 191 from Big Timber through Judith Gap. Secure loose
outdoor objects.
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.
&&
$$
Additional graphics for this hazard can be found at
http://www.weather.gov/billings
Arends
URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
946 AM MST Tue Dec 9 2025
MTZ305-306-310-311-313-314-317-318-320-321-092200-
/O.CON.KTFX.HW.W.0029.000000T0000Z-251209T2200Z/
Hill County-Northern Blaine County-Western and Central Chouteau
County-Bears Paw Mountains and Southern Blaine-Judith Basin
County and Judith Gap-Fergus County below 4500ft-Little Belt and
Highwood Mountains-Snowy and Judith Mountains-Big Belt, Bridger
and Castle Mountains-Meagher County Valleys-
Including the following locations: Maudlow, Kings Hill Pass,
Bozeman Pass, Checkerboard, Carter, Hilger, Fort Belknap, Zurich,
Trident, Moccasin, Hobson, Monarch, Harlem, Rocky Boy, Ringling,
Raynesford, Benchland, White Sulphur Springs, Battle Ridge Pass,
Deep Creek Pass, Hogeland, Lewistown, Neihart, Floweree, Havre,
Geyser, Chinook, Stanford, Windham, Fort Benton, and Martinsdale
946 AM MST Tue Dec 9 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 3 PM MST THIS
AFTERNOON...
* WHAT...West winds 30 to 40 mph with gusts up to 70 mph.
* WHERE...Bears Paw, Highwood, Little Belt, and Snowy Mountains,
Hill County, Northern Blaine County, Western and Central Chouteau
County, Judith Basin County and Judith Gap, Fergus County below
4500ft, Big Belt, Bridger and Castle Mountains, and Meagher County
Valleys.
* WHEN...Until 3 PM MST this afternoon.
* IMPACTS...Travel could be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remember, a High Wind Warning means that there is at least an 80%
chance of 40 mph sustained winds or 58 mph wind gusts occurring
during the warning period.
&&
$$
Wilson
Avalanche Warning
MTZ001-101600-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Backcountry Avalanche Warning
Idaho Panhandle Avalanche Center Sandpoint ID
Relayed by National Weather Service Missoula MT
904 AM MST Tue Dec 9 2025
The following message is transmitted at the request of Idaho Panhandle
Avalanche Center Sandpoint ID.
...AVALANCHE WARNING ISSUED BY THE IDAHO PANHANDLE AVALANCHE CENTER...
16:00 PST Mon Dec 08 2025
The Idaho Panhandle Avalanche Center in Sandpoint has issued a BACKCOUNTRY
AVALANCHE WARNING for the following areas:
NWS Missoula MT -
MTZ001 (MTZ001)
* WHAT...THIS IS ONLY A TEST - DISREGARD. WE`RE ATTEMPTING TO TROUBLESHOOT
EMAIL SENDING ERRORS.
* WHERE...THIS IS ONLY A TEST - DISREGARD. WE`RE ATTEMPTING TO TROUBLESHOOT
EMAIL SENDING ERRORS.
* WHEN...In effect from Mon 16:00 PST to Tue 16:00 PST.
* IMPACTS...THIS IS ONLY A TEST - DISREGARD. WE`RE ATTEMPTING TO
TROUBLESHOOT EMAIL SENDING ERRORS.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...THIS IS ONLY A TEST - DISREGARD.
WE`RE ATTEMPTING TO TROUBLESHOOT EMAIL SENDING ERRORS.
Consult http://www.idahopanhandleavalanche.org/ or www.avalanche.org for
more detailed information.
Similar avalanche danger may exist at locations outside the coverage area of
this or any avalanche center.
$$
MTZ067-101200-
Urgent - Immediate Broadcast Requested
Avalanche Warning
Gallatin National Forest Avalanche Center
Relayed by National Weather Service Billings MT
557 AM MST Tue Dec 9 2025
The following message is transmitted at the request of the
Gallatin National Forest Avalanche Center.
The Gallatin NF Avalanche Center in Bozeman has issued a
BACKCOUNTRY AVALANCHE WARNING for the following areas:
NWS Billings MT - MTZ067 (MTZ067)
* WHAT...The avalanche danger is HIGH and avalanches will happen
today.
* WHERE...The mountains near Cooke City
* WHEN...In effect from Tue 04:39 MST to Wed 04:39 MST.
* IMPACTS...Avalanches have been happening for the last 4 days.
More snow and especially high winds will cause many more
avalanches today.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions. Stay far away from any steep slope. Avalanches may
be triggered from flat terrain below steeper slopes.
Consult http://www.mtavalanche.com or www.avalanche.org for more
detailed information.
Similar avalanche danger may exist at locations outside the
coverage area of this or any avalanche center.
$$
MTZ001-002-101200-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Backcountry Avalanche Warning
Flathead Avalanche Center Hungry Horse MT
Relayed by National Weather Service Missoula MT
534 AM MST Tue Dec 9 2025
The following message is transmitted at the request of Flathead Avalanche
Center Hungry Horse MT.
...AVALANCHE WARNING ISSUED BY THE FLATHEAD AVALANCHE CENTER...
06:00 MST Tue Dec 09 2025
The Flathead Avalanche Center in Hungry Horse has issued a BACKCOUNTRY
AVALANCHE WARNING for the following areas:
NWS Missoula MT -
MTZ001 (MTZ001)...MTZ002 (MTZ002)
* WHAT...Heavy rain, heavy snowfall, strong winds, and above-freezing
temperatures have created very dangerous avalanche conditions.
* WHERE...The Whitefish, Swan, and Flathead Ranges, as well as the Apgar
Mountains, Lake McDonald Valley, and Marias Pass areas of Glacier National
Park.
* WHEN...In effect from Tue 06:00 MST to Wed 05:00 MST.
* IMPACTS...Large to very large natural avalanches are likely on mid- and
upper-elevation slopes; they may involve wet snow or dense slabs of new and
wind-drifted snow. These slides can run into low elevation terrain and
valley bottoms, including terrain where it doesn`t appear to be enough snow
cover for avalanche hazards.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche
conditions. Travel in and below avalanche terrain is not recommended.
Avalanches may run long distances and can run into mature forests, valley
floors, or flat terrain.
Consult http://www.flatheadavalanche.org/ or www.avalanche.org for more
detailed information.
Similar avalanche danger may exist at locations outside the coverage area of
this or any avalanche center.
$$
IDC017-021-079-100000-
Avalanche Warning
Idaho Panhandle Avalanche Center Sandpoint ID
Relayed by National Weather Service Spokane WA
504 PM PST Mon Dec 8 2025
The Idaho Panhandle Avalanche Center in Sandpoint has issued a
BACKCOUNTRY AVALANCHE WARNING for the following areas:
NWS Missoula MT - MTZ001 (MTZ001)
NWS Spokane WA - ID 017 (Bonner County)...
ID 021 (Boundary County)...
ID 079 (Shoshone County)
* WHAT...An Avalanche Warning is in effect from Monday 4 PM to
Tuesday 4 PM. Very dangerous avalanche conditions will develop
overnight and last though Tuesday as heavy, wet snowfall
transitions to heavy rain along with strong winds. You can very
easily trigger avalanches large enough to bury or kill you, and
some will release spontaneously. Avoid travel in avalanche
terrain during this period.
* WHERE...The Selkirk Mountains, West and East Cabinet Mountains, and
the Silver Valley-Bitterroot Mountains above 4,000 feet.
* WHEN...In effect from Mon 16:00 PST to Tue 16:00 PST.
* IMPACTS...A potent atmospheric river characterized by near-
historic moisture will introduce a firehose of moisture into
North Idaho and Northwestern Montana. The rain line will rise to
around 7,000 to 7,500 feet overnight Monday and will saturate
recent snowfall and overload pre-existing weak snow layers. It
will be very likely for backcountry travelers to trigger
avalanches and natural avalanches are likely. Avalanches can
break wide across terrain features and run long distances to
lower elevations.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Travel in avalanche terrain
is not recommended during this period.
Consult http://www.idahopanhandleavalanche.org/ or
www.avalanche.org for more detailed information.
Similar avalanche danger may exist at locations outside the coverage
area of this or any avalanche center.
$$
MTC029-053-100115-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Backcountry Avalanche Warning
Relayed by National Weather Service Missoula MT
601 PM MST Mon Dec 8 2025
The following message is transmitted at the request of Idaho Panhandle
Avalanche Center Sandpoint ID.
...AVALANCHE WARNING ISSUED BY THE IDAHO PANHANDLE AVALANCHE CENTER...
16:00 PST Mon Dec 08 2025 The Idaho Panhandle Avalanche Center in Sandpoint
has issued a BACKCOUNTRY AVALANCHE WARNING for the following areas:
NWS Missoula MT -
MTZ001 (MTZ001)
NWS Spokane WA -
ID 017 (Bonner County)...ID 021 (Boundary County)
* WHAT...An Avalanche Warning is in effect from Monday 4 PM to Tuesday 4
PM. Very dangerous avalanche conditions will develop overnight and last
though Tuesday as heavy, wet snowfall transitions to heavy rain along with
strong winds. You can very easily trigger avalanches large enough to bury
or kill you, and some will release spontaneously. Avoid travel in avalanche
terrain during this period.
* WHERE...The Selkirk Mountains, West and East Cabinet Mountains, and the
Silver Valley-Bitterroot Mountains above 4,000 feet.
* WHEN...In effect from Mon 16:00 PST to Tue 16:00 PST.
* IMPACTS...A potent atmospheric river characterized by near-historic
moisture will introduce a firehose of moisture into North Idaho and
Northwestern Montana. The rain line will rise to around 7,000 to 7,500 feet
overnight Monday and will saturate recent snowfall and overload pre-
existing weak snow layers. It will be very likely for backcountry travelers
to trigger avalanches and natural avalanches are likely. Avalanches can
break wide across terrain features and run long distances to lower
elevations.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Travel in avalanche terrain is not
recommended during this period.
Consult http://www.idahopanhandleavalanche.org/ or www.avalanche.org for
more detailed information.
Similar avalanche danger may exist at locations outside the coverage area
of this or any avalanche center.
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
320 AM MST Tue Dec 9 2025
MTZ301-307-100000-
/O.NEW.KTFX.WW.Y.0054.251210T0700Z-251210T1800Z/
East Glacier Park Region-Southern Rocky Mountain Front-
Including the following locations: Saint Mary, Rogers Pass, East
Glacier Park, Logan Pass, Babb, Kiowa, and Marias Pass
320 AM MST Tue Dec 9 2025
...WINTER WEATHER ADVISORY IN EFFECT
FROM MIDNIGHT TONIGHT TO 11 AM MST WEDNESDAY...
* WHAT...Snow expected. Total snow accumulations 2 to 4 inches on
Marias Pass, and up to 7 inches at ridge tops.
* WHERE...The Continental Divide along the Rocky Mountain Front.
* WHEN...From midnight tonight to 11 AM MST Wednesday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.
* ADDITIONAL DETAILS...Snowfall rates near 1 inch per hour will be
possible between 4 AM and 7 AM Wednesday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions can be obtained by calling 5 1 1 or visiting the MDT Road
Report website.
&&
$$
Brusda
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
1242 AM MST Tue Dec 9 2025
MTZ002-043-101800-
/O.NEW.KMSO.WW.Y.0047.251210T0700Z-251210T1800Z/
West Glacier Region-Potomac/Seeley Lake Region-
1242 AM MST Tue Dec 9 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM
MST WEDNESDAY...
* WHAT...Snow expected. There is a likelihood of moderate winter
weather impacts. Total snow accumulations of 2 to 5 inches.
* WHERE...Marias Pass, Highway 83 Bigfork to Swan Lake, Highway 83
Seeley Lake to Condon, Glacier National Park, Highway 200 Bonner
to Greenough, Polebridge, Essex, I-90 East Missoula to Bearmouth,
and Bad Rock Canyon.
* WHEN...From midnight tonight to 11 AM MST Wednesday.
* IMPACTS...For MODERATE winter weather impacts, expect disruptions
to normal activities. Difficult traveling conditions. Use extra
caution while driving. The difficult conditions could impact the
Wednesday morning commute, especially over higher passes.
* ADDITIONAL DETAILS...Snowfall rates of 1 inch per hour will be
possible between 4am and 7am
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
Wind Advisory
URGENT - WEATHER MESSAGE
National Weather Service Billings MT
1055 AM MST Tue Dec 9 2025
MTZ065-066-092100-
/O.EXP.KBYZ.HW.W.0013.000000T0000Z-251209T1800Z/
/O.NEW.KBYZ.WI.Y.0023.251209T1800Z-251209T2100Z/
Livingston Area-Beartooth Foothills-
Including the locations of Mc Leod, Livingston, Limestone, Fishtail,
Nye, and Dean
1055 AM MST Tue Dec 9 2025
...HIGH WIND WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...
...WIND ADVISORY IN EFFECT UNTIL 2 PM MST THIS AFTERNOON...
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected.
* WHERE...Beartooth Foothills and Livingston Area.
* WHEN...Until 2 PM MST this afternoon.
* IMPACTS...Strong crosswinds will make travel difficult along
Interstate 90 from Livingston to Big Timber and roads along the
Beartooth Foothills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution and consider postponing travel
until winds subside, or take an alternate route.
&&
$$
Flood Watch
Flood Watch
National Weather Service Spokane WA
604 AM PST Tue Dec 9 2025
IDC009-055-079-100315-
/O.CON.KOTX.FA.A.0005.000000T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benewah-Kootenai-Shoshone-
Including the cities of Tensed, Emida, Coeur d`Alene, Bayview,
Rathdrum, Osburn, St. Maries, St. Joe, Smelterville, Plummer,
Kingston, Mullan, Prichard, Kellogg, Worley, Calder, Hayden, Post
Falls, Pinehurst, Athol, Wallace, Santa, Cataldo, and Murray
604 AM PST Tue Dec 9 2025
...FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...A portion of North Idaho, including the following
counties, Benewah, Kootenai and Shoshone.
* WHEN...Through Thursday afternoon.
* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
There will also be a risk of mud and rock slides in steep terrain.
* ADDITIONAL DETAILS...
- An atmospheric river moving into the Pacific Northwest
continues to bring moderate to heavy rainfall to the central
Idaho Panhandle. Rain and snowmelt will bring an increased
risk for urban and small stream flooding and mud and rock
slides in steep terrain.
- http://www.weather.gov/safety/flood
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.
&&
$$
JCLEV
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.
&&
$$
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.
MTC029-047-053-089-092115-
/O.EXB.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Flathead-Lake-Lincoln-Sanders-
1253 PM MST Mon Dec 8 2025
...FLOOD WATCH IN EFFECT FROM 5 PM MST THIS AFTERNOON THROUGH
THURSDAY AFTERNOON...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...A portion of northwest Montana, including the following
counties, Flathead, Lake, Lincoln and Sanders.
* WHEN...From 5 PM MST 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. Rockfall is possible.
* ADDITIONAL DETAILS...
- A prolonged atmospheric river event will bring periods of
moderate to heavy rainfall to the region. Snow levels will
rise to 6,000 to 7,000 feet during the first moisture plume
on Tuesday. Snow levels will fall temporarily to 3,000 to
5,000 feet Tuesday night before rising again to 6,000 to
9,000 feet Wednesday and Thursday. Between 4 and 10 inches of
total precipitation will fall this week in the mountains and
upslope regions and between 1 and 4 inches of total rainfall
is expected in the valleys. Landslides in areas of steep
terrain and minor flooding in urban and poor drainage areas
are 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.
&&
$$
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.
MTC061-092115-
/O.EXT.KMSO.FA.A.0009.251209T0000Z-251212T0000Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mineral-
1253 PM MST Mon Dec 8 2025
...FLOOD WATCH NOW IN EFFECT FROM 5 PM MST THIS AFTERNOON THROUGH
THURSDAY AFTERNOON...
* WHAT...Flooding caused by rain and snowmelt continues to be
possible.
* WHERE...A portion of west central Montana, including the following
county, Mineral.
* WHEN...From 5 PM MST 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 Mineral County, 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 around 8,000 feet. By Thursday, significant precipitation
totals are forecast, with 1 to 5 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 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.
&&
$$
High Wind Watch
URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
946 AM MST Tue Dec 9 2025
MTZ302-303-308-101215-
/O.EXP.KTFX.HW.W.0029.000000T0000Z-251209T1700Z/
/O.CON.KTFX.HW.A.0029.251210T1500Z-251211T0000Z/
Northern High Plains-Eastern Glacier, Western Toole, and Central
Pondera-Southern High Plains-
Including the following locations: Santa Rita, Bynum, Heart
Butte, Ethridge, Cut Bank, Choteau, Dupuyer, Browning, and
Pendroy
946 AM MST Tue Dec 9 2025
...HIGH WIND WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY AFTERNOON...
...HIGH WIND WARNING WILL EXPIRE AT 10 AM MST THIS MORNING...
* WHAT...For the High Wind Watch, west winds 30 to 40 mph with gusts
up to 60 mph possible.
* WHERE...The foothills and plains adjacent to the Rocky Mountain
Front, and Eastern Glacier, Western Toole, and Central Pondera
Counties.
* WHEN...From Wednesday morning through Wednesday afternoon.
* IMPACTS...Travel could be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remember, a High Wind Watch means that there is at least a 50%
chance of 40 mph sustained winds or 58 mph wind gusts occurring
during the watch period.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
248 AM MST Tue Dec 9 2025
WYZ001>020-022>030-101400-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
248 AM MST Tue Dec 9 2025
...WINTER STORM WARNINGS REMAIN IN EFFECT FROM 5 PM THIS AFTERNOON
TO 5 PM MST WEDNESDAY...
...HIGH WIND WARNING IN EFFECT THROUGH WEDNESDAY EVENING...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Moderate to heavy snowfall continues for western mountains. Please
see Winter Weather Products and forecasts for details.
Strong to high wind developing from Kemmerer through Rock Springs
and into Natrona County. Please see High Wind Warnings for
details.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Wednesday and Thursday...Snow likely in the western and northern
mountains. Strong to high wind continuing in southern Wyoming.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
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.
$$
