Yellowstone National Park, Wyoming

Regional Weather Alerts


     

Alert: Winter Storm Warning
Area(s): Eastern Toole and Liberty; Hill County; Northern Blaine County; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine
Effective: 2025-12-12 @ 3:49 am -> 2025-12-13 @ 6:00 am
Onset: 2025-12-12 @ 5:00 am -> 2025-12-12 @ 4:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Winter Storm Warning issued December 12 at 2:49AM MST until December 13 at 5:00AM MST by NWS Great Falls MT
Description: * WHAT...Heavy snow expected. Total snow accumulations between 6 and
9 inches.

* WHERE...Eastern Toole and Liberty Counties, Hill County, Northern
Blaine County, Western and Central Chouteau County, and Bears Paw
Mountains and Southern Blaine.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult.

Alert: Ice Storm Warning
Area(s): Upper Blackfoot and MacDonald Pass; Helena Valley; Canyon Ferry Area
Effective: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 11:00 am
Onset: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 11:00 am
Severity: Extreme
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Ice Storm Warning issued December 12 at 2:49AM MST until December 12 at 10:00AM MST by NWS Great Falls MT
Description: * WHAT...Freezing rain and snow will create significant icing
through Friday morning. Additional snow accumulations up to 2
inches.

* WHERE...Canyon Ferry Area, Helena Valley, and Upper Blackfoot and
MacDonald Pass.

* WHEN...Until 10 AM MST this morning.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous.

* ADDITIONAL DETAILS...A period of freezing rain overnight has
created significant icing on road surfaces with some areas
changing to snow. Snow is likely to change back to freezing rain
Friday morning before ending creating additional roadway icing.

Alert: Winter Weather Advisory
Area(s): Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Pondera and Eastern Teton
Effective: 2025-12-12 @ 3:49 am -> 2025-12-13 @ 6:00 am
Onset: 2025-12-12 @ 5:00 am -> 2025-12-12 @ 4:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Winter Weather Advisory issued December 12 at 2:49AM MST until December 13 at 5:00AM MST by NWS Great Falls MT
Description: * WHAT...Snow expected. Total snow accumulations between 2 and 6
inches.

* WHERE...The Interstate 15 Corridor north of Power, and Northern
High Plains.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult.

Alert: Winter Storm Warning
Area(s): Judith Basin County and Judith Gap; Fergus County below 4500ft
Effective: 2025-12-12 @ 3:49 am -> 2025-12-13 @ 6:00 am
Onset: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 4:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Winter Storm Warning issued December 12 at 2:49AM MST until December 13 at 5:00AM MST by NWS Great Falls MT
Description: * WHAT...Heavy snow. Additional snow accumulations between 6 and 11
inches.

* WHERE...Fergus County below 4500ft and Judith Basin County and
Judith Gap.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult.

Alert: Winter Weather Advisory
Area(s): Southern High Plains; Cascade County below 5000ft; Gates of the Mountains; Big Belt, Bridger and Castle Mountains; Meagher County Valleys
Effective: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 7:00 pm
Onset: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 4:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Winter Weather Advisory issued December 12 at 2:49AM MST until December 12 at 6:00PM MST by NWS Great Falls MT
Description: * WHAT...Snow. Additional snow accumulations between 2 and 5 inches.

* WHERE...Big Belt, Bridger and Castle Mountains, Gates of the
Mountains, Meagher County Valleys, Cascade County below 5000ft,
and Southern High Plains.

* WHEN...Until 6 PM MST this evening.

* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Friday morning and evening commutes.

Alert: Winter Storm Warning
Area(s): East Glacier Park Region; Southern Rocky Mountain Front; Little Belt and Highwood Mountains; Snowy and Judith Mountains
Effective: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 7:00 pm
Onset: 2025-12-12 @ 3:49 am -> 2025-12-12 @ 4:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:49 am
Headline: Winter Storm Warning issued December 12 at 2:49AM MST until December 12 at 6:00PM MST by NWS Great Falls MT
Description: * WHAT...Heavy snow. Additional snow accumulations between 3 and 9
inches. Winds gusting as high as 35 mph.

* WHERE...The Highwood, Little Belt, Judith, and Snowy Mountains,
and The Continental Divide along the Rocky Mountain Front.

* WHEN...Until 6 PM MST this evening.

* IMPACTS...Travel could be very difficult.

Alert: Cold Weather Advisory
Area(s): Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Hill County; Northern Blaine County
Effective: 2025-12-12 @ 3:41 am -> 2025-12-12 @ 11:00 am
Onset: 2025-12-12 @ 3:41 am -> 2025-12-12 @ 11:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Great Falls MT on 2025-12-12 @ 3:41 am
Headline: Cold Weather Advisory issued December 12 at 2:41AM MST until December 12 at 10:00AM MST by NWS Great Falls MT
Description: * WHAT...Very cold wind chills as low as 25 below zero.

* WHERE...Eastern Glacier, Western Toole, and Central Pondera
Counties, Eastern Toole and Liberty Counties, Hill County, and
Northern Blaine County.

* WHEN...Until 10 AM MST this morning.

* IMPACTS...The dangerously cold wind chills as low as 25 below zero
could cause frostbite on exposed skin in as little as 30 minutes.

Alert: Winter Weather Advisory
Area(s): Northern Park; Livingston Area
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 10:00 am
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Weather Advisory issued December 12 at 2:10AM MST until December 12 at 9:00AM MST by NWS Billings MT
Description: * WHAT...Mixed precipitation occurring including freezing rain.
Additional snow accumulations up to two inches and ice
accumulations from a light glaze to 0.05 inches.

* WHERE...Livingston Area and Northern Park.

* WHEN...Until 9 AM MST this morning.

* IMPACTS...Plan on slick road conditions. The hazardous conditions
will impact the Friday morning commute.

Alert: Winter Weather Advisory
Area(s): Fallon; Powder River; Carter
Effective: 2025-12-12 @ 3:10 am -> 2025-12-13 @ 9:00 am
Onset: 2025-12-12 @ 3:10 am -> 2025-12-13 @ 3:15 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Weather Advisory issued December 12 at 2:10AM MST until December 13 at 8:00AM MST by NWS Billings MT
Description: * WHAT...Snow expected. Additional snow accumulations between 2 and 6
inches.

* WHERE...Carter, Fallon, and Powder River.

* WHEN...Until 8 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
will impact the Friday morning and evening commutes.

* ADDITIONAL DETAILS...Lower snowfall totals will occur in Powder
River and Carter Counties with higher amounts in Fallon County.
Snowfall in parts of Fallon county may exceed 6 inches.

Alert: Winter Weather Advisory
Area(s): Red Lodge Foothills; Beartooth Foothills; Southeastern Carbon
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 10:00 am
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 10:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Weather Advisory issued December 12 at 2:10AM MST until December 12 at 9:00AM MST by NWS Billings MT
Description: * WHAT...Snow occurring. Additional snow accumulations up to two
inches.

* WHERE...Beartooth Foothills, Red Lodge Foothills, and Southeastern
Carbon.

* WHEN...Until 9 AM MST this morning.

* IMPACTS...Roads, and especially bridges and overpasses, will likely
become slick and hazardous. The hazardous conditions will impact
the Friday morning commute.

Alert: Winter Storm Warning
Area(s): Treasure; Northern Rosebud; Custer
Effective: 2025-12-12 @ 3:10 am -> 2025-12-13 @ 9:00 am
Onset: 2025-12-12 @ 6:00 am -> 2025-12-13 @ 3:15 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Storm Warning issued December 12 at 2:10AM MST until December 13 at 8:00AM MST by NWS Billings MT
Description: * WHAT...For the Winter Weather Advisory, snow occurring. Additional
snow accumulations up to one inch. For the Winter Storm Warning,
heavy snow expected. Total snow accumulations between 4 and 8
inches.

* WHERE...Treasure, Custer, and Northern Rosebud.

* WHEN...For the Winter Weather Advisory, until 5 AM MST early this
morning. For the Winter Storm Warning, from 5 AM early this morning
to 8 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
will impact the Friday morning and evening commutes.

Alert: Winter Storm Warning
Area(s): Musselshell; Golden Valley; Judith Gap; Northeastern Yellowstone; Southern Wheatland
Effective: 2025-12-12 @ 3:10 am -> 2025-12-13 @ 12:00 am
Onset: 2025-12-12 @ 3:10 am -> 2025-12-13 @ 12:00 am
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Storm Warning issued December 12 at 2:10AM MST until December 12 at 11:00PM MST by NWS Billings MT
Description: * WHAT...Heavy snow occurring. Additional snow accumulations between
4 and 7 inches. Winds gusting as high as 35 mph.

* WHERE...Golden Valley, Judith Gap, Musselshell, Southern Wheatland,
and Northeastern Yellowstone.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be very difficult. The hazardous conditions
will impact the Friday morning and evening commutes.

Alert: Winter Storm Warning
Area(s): Crazy Mountains
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 9:00 pm
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Storm Warning issued December 12 at 2:10AM MST until December 12 at 8:00PM MST by NWS Billings MT
Description: * WHAT...Heavy snow occurring. Additional snow accumulations between
8 and 16 inches. Winds gusting as high as 45 mph.

* WHERE...Crazy Mountains.

* WHEN...Until 8 PM MST this evening.

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

* ADDITIONAL DETAILS...Avalanche danger may increase.

Alert: Winter Storm Warning
Area(s): Northern Stillwater; Northern Big Horn; Southern Rosebud; Southern Big Horn; Northern Sweet Grass; Melville Foothills; Southwestern Yellowstone
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 9:00 pm
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 9:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Storm Warning issued December 12 at 2:10AM MST until December 12 at 8:00PM MST by NWS Billings MT
Description: * WHAT...Heavy snow occurring. Additional snow accumulations between
3 and 6 inches.

* WHERE...Portions of south central and southeast Montana.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Travel will be very difficult with slick and snow covered
roads, and areas of poor visibility. The hazardous conditions will
impact the Friday morning and evening commutes.

Alert: Winter Weather Advisory
Area(s): Bighorn Canyon; Northern Carbon; Sheridan Foothills
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 1:00 pm
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Weather Advisory issued December 12 at 2:10AM MST until December 12 at 12:00PM MST by NWS Billings MT
Description: * WHAT...Snow occurring. Additional snow accumulations up to three
inches.

* WHERE...In Montana, Bighorn Canyon and Northern Carbon. In Wyoming,
Sheridan Foothills.

* WHEN...Until noon MST today.

* IMPACTS...Plan on slick road conditions. The hazardous conditions
will impact the Friday morning commute.

Alert: Winter Weather Advisory
Area(s): Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains
Effective: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 1:00 pm
Onset: 2025-12-12 @ 3:10 am -> 2025-12-12 @ 1:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Billings MT on 2025-12-12 @ 3:10 am
Headline: Winter Weather Advisory issued December 12 at 2:10AM MST until December 12 at 12:00PM MST by NWS Billings MT
Description: * WHAT...Snow occurring. Additional snow accumulations up to 3
inches.

* WHERE...In Montana, Pryor/Northern Bighorn Mountains. In Wyoming,
Northeast Bighorn Mountains.

* WHEN...Until noon MST today.

* IMPACTS...Plan on slick road conditions. The hazardous conditions
will impact the Friday morning commute.

Alert: Cold Weather Advisory
Area(s): Central and Southern Valley; Western Roosevelt; McCone; Richland; Dawson; Wibaux; Northern Phillips; Eastern Roosevelt
Effective: 2025-12-12 @ 2:11 am -> 2025-12-12 @ 2:00 pm
Onset: 2025-12-12 @ 2:11 am -> 2025-12-12 @ 2:00 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2025-12-12 @ 2:11 am
Headline: Cold Weather Advisory issued December 12 at 1:11AM MST until December 12 at 1:00PM MST by NWS Glasgow MT
Description: * WHAT...Very cold wind chills between 25 and 35 below zero expected.

* WHERE...Central and Southern Valley, Dawson, Roosevelt, McCone,
Northern Phillips, Richland, and Wibaux Counties.

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

* IMPACTS...The dangerously cold wind chills as low as 35 below zero
could cause frostbite on exposed skin in as little as 10 minutes.
Frostbite and hypothermia will occur if unprotected skin is
exposed to these temperatures. Very cold temperatures can lead to
hypothermia with prolonged exposure.

Alert: Extreme Cold Warning
Area(s): Daniels; Sheridan; Northern Valley
Effective: 2025-12-12 @ 2:11 am -> 2025-12-12 @ 1:00 pm
Onset: 2025-12-12 @ 2:11 am -> 2025-12-12 @ 1:00 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2025-12-12 @ 2:11 am
Headline: Extreme Cold Warning issued December 12 at 1:11AM MST until December 12 at 12:00PM MST by NWS Glasgow MT
Description: * WHAT...Dangerously cold wind chills as low as 40 below zero
expected.

* WHERE...Daniels, Northern Valley, and Sheridan Counties.

* WHEN...Until noon MST today.

* IMPACTS...The dangerously cold wind chills as low as 40 below zero
could cause frostbite on exposed skin in as little as 10 minutes.
Frostbite and hypothermia will occur if unprotected skin is
exposed to these temperatures. An extended period of freezing
temperatures could cause ruptured water pipes.

Alert: Winter Storm Warning
Area(s): Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone; Dawson; Prairie; Wibaux; Northern Phillips; Southwest Phillips
Effective: 2025-12-12 @ 2:00 am -> 2025-12-13 @ 9:00 am
Onset: 2025-12-12 @ 2:00 am -> 2025-12-12 @ 5:30 pm
Severity: Severe
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2025-12-12 @ 2:00 am
Headline: Winter Storm Warning issued December 12 at 1:00AM MST until December 13 at 8:00AM MST by NWS Glasgow MT
Description: * WHAT...Heavy snow. Additional snow accumulations between 5 and 11
inches.

* WHERE...A portion of northeast Montana.

* WHEN...Until 8 AM MST Saturday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Travel could be very difficult.
The hazardous conditions could impact the Friday morning and
evening commutes.

Alert: Winter Weather Advisory
Area(s): Daniels; Western Roosevelt; Richland; Northern Valley; Eastern Roosevelt
Effective: 2025-12-12 @ 2:00 am -> 2025-12-13 @ 9:00 am
Onset: 2025-12-12 @ 3:00 pm -> 2025-12-12 @ 5:30 pm
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Glasgow MT on 2025-12-12 @ 2:00 am
Headline: Winter Weather Advisory issued December 12 at 1:00AM MST until December 13 at 8:00AM MST by NWS Glasgow MT
Description: * WHAT...Snow expected. Total snow accumulations between 2 and 5
inches.

* WHERE...Daniels, Northern Valley, Richland, and Roosevelt Counties.

* WHEN...From 2 PM this afternoon to 8 AM MST Saturday.

* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions. The hazardous conditions could impact the Friday
evening commute.

Alert: Winter Weather Advisory
Area(s): West Glacier Region
Effective: 2025-12-11 @ 1:40 pm -> 2025-12-13 @ 6:00 am
Onset: 2025-12-12 @ 1:00 am -> 2025-12-13 @ 6:00 am
Severity: Moderate
Certainty: Likely
Urgency: Expected
Issued By: NWS Missoula MT on 2025-12-11 @ 1:40 pm
Headline: Winter Weather Advisory issued December 11 at 12:40PM MST until December 13 at 5:00AM MST by NWS Missoula MT
Description: * WHAT...Mixed precipitation expected. There is a likelihood of
minor to moderate winter weather impacts. Total snow accumulations
up to 4 inches generally above 4000 feet, locally up to 8 inches
on Marias Pass. Ice accumulations around a light glaze.

* WHERE...Bad Rock Canyon, Glacier National Park, Marias Pass,
Essex, Highway 83 Bigfork to Swan Lake, and Polebridge.

* WHEN...From midnight tonight to 5 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Friday morning and evening commutes,
especially over higher passes.

* ADDITIONAL DETAILS...Watch for brief but intense snow showers
quickly dropping visiibility. Also, light freezing rain may impact
US-2 from Essex to West Glacier.

Alert: Flood Warning
Area(s): Lincoln, MT
Effective: 2025-12-11 @ 12:51 pm
Onset: 2025-12-11 @ 12:51 pm -> 2025-12-13 @ 1:00 am
Severity: Severe
Certainty: Observed
Urgency: Immediate
Issued By: NWS Missoula MT on 2025-12-11 @ 12:51 pm
Headline: Flood Warning issued December 11 at 11:51AM MST by NWS Missoula MT
Description: ...The Flood Warning continues for the following rivers in Montana...

Fisher River Near Libby affecting Lincoln County.

* WHAT...Minor flooding is ongoing.

* WHERE...Fisher River near Near Libby.

* WHEN...Until further notice.

* IMPACTS...At 7.5 feet, Flooding affects low lying areas adjacent
to the river. Flooding also causes minor washouts along Fisher
River Road.
At 9.0 feet, Flooding affects low lying homes and roads adjacent
to the river. Flooding affects Fisher River Road and several flood
prone areas along the road.

* ADDITIONAL DETAILS...
- At 10:45 AM MST Thursday the stage was 7.2 feet.
- Bankfull stage is 7.5 feet.
- Forecast...The river will rise to flood stage late tonight.
It will then fall to 5.4 feet late Monday evening. It will
rise to 6.2 feet late Wednesday evening. It will then fall
again and remain below flood stage.
- Flood stage is 7.5 feet.
- Flood History...This crest compares to a previous crest of
6.7 feet on 06/16/2022.
- https://www.weather.gov/mso/hydrology

Alert: Flood Warning
Area(s): Lincoln, MT
Effective: 2025-12-11 @ 12:46 pm
Onset: 2025-12-11 @ 12:46 pm -> 2025-12-13 @ 1:00 am
Severity: Severe
Certainty: Observed
Urgency: Immediate
Issued By: NWS Missoula MT on 2025-12-11 @ 12:46 pm
Headline: Flood Warning issued December 11 at 11:46AM MST by NWS Missoula MT
Description: ...The Flood Warning continues for the following rivers in Montana...

Yaak River Near Troy affecting Lincoln County.

For the Yaak River...including Near Troy...Minor flooding is
forecast.

* WHAT...Flooding is ongoing, with road closures and impacts to
homes.

* WHERE...Yaak River near Near Troy.

* WHEN...Until further notice.

* IMPACTS...At 8.0 feet, Flooding affects low lying areas adjacent
to the river.
At 8.5 feet, Flooding affects low lying areas adjacent to the
river including homes and access roads. Sylvanite Ranger Station
Road and Upper Ford Road affected by flooding.

* ADDITIONAL DETAILS...
- At 10:45 AM MST Thursday the stage was 8.3 feet.
- Bankfull stage is 7.5 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 10:45 AM MST Thursday was 8.3 feet.
- Forecast...The river will rise to 8.9 feet late this
afternoon. It will then fall below flood stage tomorrow
morning to 5.7 feet Monday afternoon. It will rise to 6.5
feet early Wednesday morning. It will then fall again and
remain below flood stage.
- Flood stage is 8.0 feet.
- Flood History...This crest compares to a previous crest of
7.8 feet on 05/21/2020.
- https://www.weather.gov/mso/hydrology