Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | High Wind Warning |
| Area(s): | Madison River Valley |
| Effective: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 5:00 am |
| Headline: | High Wind Warning issued December 11 at 4:00AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 30 to 40 mph, with gusts up to 60 mph. * WHERE...Madison River Valley. * WHEN...Until 3 PM MST this afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Judith Basin County and Judith Gap |
| Effective: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 5:00 am |
| Headline: | High Wind Warning issued December 11 at 4:00AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 30 to 40 mph, with gusts up to 65 mph. * WHERE...Judith Basin County and Judith Gap. * WHEN...Until 3 PM MST this afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Cascade County below 5000ft |
| Effective: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 5:00 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 5:00 am |
| Headline: | High Wind Warning issued December 11 at 4:00AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 35 to 45 mph with gusts up to 65 mph. * WHERE...Cascade County below 5000ft. * WHEN...Until 3 PM MST this afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| Alert: | Flood Warning |
| Area(s): | Lincoln, MT |
| Effective: | 2025-12-11 @ 4:29 am |
| Onset: | 2025-12-11 @ 5:58 pm -> 2025-12-12 @ 4:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-11 @ 4:29 am |
| Headline: | Flood Warning issued December 11 at 3:29AM MST by NWS Missoula MT |
| Description: |
...The National Weather Service in Missoula MT has issued a Flood Warning 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...Minor flooding is forecast. * WHERE...Yaak River near Near Troy. * WHEN...From this afternoon 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 2:45 AM MST Thursday the stage was 6.6 feet. - Bankfull stage is 7.5 feet. - Forecast...The river will fall to 6.3 feet early this morning. It will then rise above flood stage late this afternoon to 8.5 feet late this evening. It will fall below flood stage tomorrow morning to 5.4 feet early Tuesday morning. It will then rise to 6.1 feet late Wednesday morning. It will 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 |
| Alert: | Winter Weather Advisory |
| Area(s): | East Glacier Park Region |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to one inch. Winds gusting as high as 70 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 35 mph. * WHERE...East Glacier Park Region Zone. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Very strong winds could cause extensive tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | East Glacier Park Region |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to one inch. Winds gusting as high as 70 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 35 mph. * WHERE...East Glacier Park Region Zone. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Very strong winds could cause extensive tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft; Little Belt and Highwood Mountains; Snowy and Judith Mountains |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. * WHERE...The Highwood, Little Belt, Judith, and Snowy Mountains, Judith Basin County and Judith Gap, and Fergus County below 4500ft. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Southern Rocky Mountain Front |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 60 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 45 mph. * WHERE...Southern Rocky Mountain Front. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Pondera and Eastern Teton |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...Snow possible. Total snow accumulations between 1 and 3 inches possible. * WHERE...The Interstate 15 Corridor north of Power, and Northern High Plains. * WHEN...From late tonight through late Friday night. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Weather Advisory |
| Area(s): | Hill County; Northern Blaine County; Bears Paw Mountains and Southern Blaine |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to one inch. Winds gusting as high as 40 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 7 inches at lower elevations and 6 to 12 inches in the mountains. * WHERE...Bears Paw Mountains and Southern Blaine, Hill County, and Northern Blaine County. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. |
| Alert: | Winter Storm Watch |
| Area(s): | Southern High Plains; Cascade County below 5000ft |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to one inch. Winds gusting as high as 50 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 2 and 6 inches possible. * WHERE...Cascade County below 5000ft and Southern High Plains. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning and evening commutes. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft; Little Belt and Highwood Mountains; Snowy and Judith Mountains |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-12 @ 12:00 am |
| Onset: | 2025-12-11 @ 10:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. * WHERE...The Highwood, Little Belt, Judith, and Snowy Mountains, Judith Basin County and Judith Gap, and Fergus County below 4500ft. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | Southern High Plains; Cascade County below 5000ft |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-12 @ 12:00 am |
| Onset: | 2025-12-11 @ 10:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to one inch. Winds gusting as high as 50 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 2 and 6 inches possible. * WHERE...Cascade County below 5000ft and Southern High Plains. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning and evening commutes. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Southern Rocky Mountain Front |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-12 @ 12:00 am |
| Onset: | 2025-12-11 @ 10:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 60 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 45 mph. * WHERE...Southern Rocky Mountain Front. * WHEN...For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Big Belt, Bridger and Castle Mountains; Meagher County Valleys |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-12 @ 12:00 am |
| Onset: | 2025-12-11 @ 10:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Gates of the Mountains, Meagher County Valleys, and Upper Blackfoot and MacDonald Pass. * WHEN...From 9 AM this morning to 11 PM MST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. |
| Alert: | Winter Storm Watch |
| Area(s): | Eastern Toole and Liberty |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations between 4 and 6 inches possible. * WHERE...Eastern Toole and Liberty Counties. * WHEN...From late tonight through late Friday night. * IMPACTS...Plan on slippery road conditions. |
| Alert: | Winter Storm Watch |
| Area(s): | Western and Central Chouteau County |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, wet snow. Additional snow accumulations up to one inch. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 7 inches possible. * WHERE...Western and Central Chouteau County. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. Gusty winds could bring down tree branches. |
| Alert: | Winter Storm Watch |
| Area(s): | Hill County; Northern Blaine County; Bears Paw Mountains and Southern Blaine |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-13 @ 6:00 am |
| Onset: | 2025-12-12 @ 1:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations up to one inch. Winds gusting as high as 40 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 7 inches at lower elevations and 6 to 12 inches in the mountains. * WHERE...Bears Paw Mountains and Southern Blaine, Hill County, and Northern Blaine County. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. |
| Alert: | Winter Weather Advisory |
| Area(s): | Western and Central Chouteau County |
| Effective: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 4:00 pm |
| Onset: | 2025-12-11 @ 4:03 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-11 @ 4:03 am |
| Headline: | Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 3:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...For the Winter Weather Advisory, wet snow. Additional snow accumulations up to one inch. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 7 inches possible. * WHERE...Western and Central Chouteau County. * WHEN...For the Winter Weather Advisory, until 3 PM MST this afternoon. For the Winter Storm Watch, from late tonight through late Friday night. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Daniels; Sheridan; Wibaux; Northern Valley; Eastern Roosevelt |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 9:00 pm |
| Onset: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Weather Advisory issued December 11 at 2:57AM MST until December 11 at 8:00PM MST by NWS Glasgow MT |
| Description: |
* WHAT...Mixed precipitation. Additional snow accumulations up to two inches and ice accumulations around one tenth of an inch. Winds gusting as high as 35 mph. * WHERE...Daniels, Eastern Roosevelt, Northern Valley, Sheridan, and Wibaux Counties. * WHEN...Until 8 PM MST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. * ADDITIONAL DETAILS...Temperature will fall sharply this afternoon, with wind chills reaching as low as 35 below zero tonight. |
| Alert: | Winter Storm Warning |
| Area(s): | Western Roosevelt; Richland |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 9:00 pm |
| Onset: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Storm Warning issued December 11 at 2:57AM MST until December 11 at 8:00PM MST by NWS Glasgow MT |
| Description: |
* WHAT...Heavy mixed precipitation. Additional snow accumulations up to two inches and ice accumulations up to one tenth of an inch. * WHERE...Richland and Western Roosevelt Counties. * WHEN...Until 8 PM MST this evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Significant ice accumulation on power lines and tree limbs may cause widespread and long-lasting power outages. Plan on slippery road conditions. * ADDITIONAL DETAILS...Temperature will fall sharply this afternoon, with wind chills reaching as low as 25 below zero tonight. |
| Alert: | Winter Weather Advisory |
| Area(s): | Petroleum; Garfield; Dawson; Prairie; Southwest Phillips |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 9:00 pm |
| Onset: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Weather Advisory issued December 11 at 2:57AM MST until December 11 at 8:00PM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the Winter Weather Advisory, mixed precipitation. Additional snow accumulations up to one inch and ice accumulations around a light glaze. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 10 inches possible. * WHERE...Dawson, Garfield, Petroleum, Prairie, and Southwest Phillips Counties. * WHEN...For the Winter Weather Advisory, until 8 PM MST this evening. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes. Roads, and especially bridges and overpasses, will likely become slick and hazardous. |
| Alert: | Winter Storm Warning |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; McCone; Northern Phillips |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 9:00 pm |
| Onset: | 2025-12-11 @ 3:57 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Storm Warning issued December 11 at 2:57AM MST until December 11 at 8:00PM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the Winter Storm Warning, heavy mixed precipitation. Additional snow accumulations up to two inches and ice accumulations around one tenth of an inch. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 3 and 8 inches possible. * WHERE...Central and Southeast Phillips, Central and Southern Valley, McCone, and Northern Phillips Counties. * WHEN...For the Winter Storm Warning, until 8 PM MST this evening. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes. Roads, and especially bridges and overpasses, will likely become slick and hazardous. Significant ice accumulation on power lines and tree limbs may cause widespread and long-lasting power outages. * ADDITIONAL DETAILS...Temperature will fall sharply this afternoon, with wind chills reaching as low as 25 below zero tonight. |
| Alert: | Winter Storm Watch |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; McCone; Northern Phillips |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-13 @ 12:00 pm |
| Onset: | 2025-12-12 @ 3:00 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Storm Watch issued December 11 at 2:57AM MST until December 13 at 11:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the Winter Storm Warning, heavy mixed precipitation. Additional snow accumulations up to two inches and ice accumulations around one tenth of an inch. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 3 and 8 inches possible. * WHERE...Central and Southeast Phillips, Central and Southern Valley, McCone, and Northern Phillips Counties. * WHEN...For the Winter Storm Warning, until 8 PM MST this evening. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes. Roads, and especially bridges and overpasses, will likely become slick and hazardous. Significant ice accumulation on power lines and tree limbs may cause widespread and long-lasting power outages. * ADDITIONAL DETAILS...Temperature will fall sharply this afternoon, with wind chills reaching as low as 25 below zero tonight. |
| Alert: | Winter Storm Watch |
| Area(s): | Petroleum; Garfield; Dawson; Prairie; Southwest Phillips |
| Effective: | 2025-12-11 @ 3:57 am -> 2025-12-13 @ 12:00 pm |
| Onset: | 2025-12-12 @ 3:00 am -> 2025-12-11 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2025-12-11 @ 3:57 am |
| Headline: | Winter Storm Watch issued December 11 at 2:57AM MST until December 13 at 11:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the Winter Weather Advisory, mixed precipitation. Additional snow accumulations up to one inch and ice accumulations around a light glaze. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 4 and 10 inches possible. * WHERE...Dawson, Garfield, Petroleum, Prairie, and Southwest Phillips Counties. * WHEN...For the Winter Weather Advisory, until 8 PM MST this evening. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes. Roads, and especially bridges and overpasses, will likely become slick and hazardous. |
| Alert: | Winter Storm Watch |
| Area(s): | Treasure; Northern Rosebud; Custer; Fallon; Powder River; Carter |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-13 @ 12:00 pm |
| Onset: | 2025-12-12 @ 6:00 am -> 2025-12-12 @ 3:30 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Storm Watch issued December 11 at 2:22AM MST until December 13 at 11:00AM MST by NWS Billings MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow and poor travel conditions expected. Total snow accumulations up to one inch. Winds gusting as high as 30 mph. For the Winter Storm Watch, heavy snow possible. Additional snow accumulations between 5 and 9 inches possible. * WHERE...Portions of south central and southeast Montana. * WHEN...For the Winter Weather Advisory, from 5 PM this afternoon to 5 AM MST Friday. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be difficult late this afternoon and evening as rapidly falling temperatures combined with rain changing to snow may result in a flash freeze on some roads. Travel conditions will remain difficult into Saturday. * ADDITIONAL DETAILS...Expect snow to become widespread and heavier Friday and continue into Saturday. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bighorn Canyon; Northern Carbon; Sheridan Foothills |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-12 @ 1:00 pm |
| Onset: | 2025-12-11 @ 7:00 pm -> 2025-12-12 @ 3:30 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Weather Advisory issued December 11 at 2:22AM MST until December 12 at 12:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 30 mph. * WHERE...In Montana, Bighorn Canyon and Northern Carbon. In Wyoming, Sheridan Foothills. * WHEN...From 6 PM this evening to noon MST Friday. * IMPACTS...Plan on difficult travel conditions as roads become snow covered and slick. * ADDITIONAL DETAILS...Travel could be difficult this evening as rapidly falling temperatures combined with rain changing to snow may result in a flash freeze on some roads. This includes Interstate 90 through Sheridan. |
| Alert: | Winter Storm Warning |
| Area(s): | Musselshell; Golden Valley; Judith Gap; Northeastern Yellowstone; Southern Wheatland |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-13 @ 12:00 am |
| Onset: | 2025-12-11 @ 3:00 pm -> 2025-12-12 @ 3:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Storm Warning issued December 11 at 2:22AM MST until December 12 at 11:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 6 and 10 inches. Winds gusting as high as 45 mph through Judith Gap. * WHERE...Golden Valley, Judith Gap, Musselshell, Southern Wheatland, and Northeastern Yellowstone. * WHEN...From 2 PM this afternoon to 11 PM MST Friday. * IMPACTS...Travel will be very difficult with slick and snow covered roads, and areas of poor visibility. Blowing and drifting snow will impact travel on US-191 through Judith Gap. * ADDITIONAL DETAILS...Rapidly falling temperatures combined with rain changing to snow may result in a flash freeze on roadways from mid afternoon into the evening. Travel may become treacherous during this time. |
| Alert: | Winter Storm Warning |
| Area(s): | Crazy Mountains |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-12 @ 9:00 pm |
| Onset: | 2025-12-11 @ 3:00 pm -> 2025-12-12 @ 3:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Storm Warning issued December 11 at 2:22AM MST until December 12 at 8:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Periods of moderate to heavy snow expected. Total snow accumulations between 10 and 18 inches on west aspects. Winds gusting as high as 60 mph. * WHERE...Crazy Mountains. * WHEN...From 2 PM this afternoon to 8 PM MST Friday. * IMPACTS...Recreation in the high country will be impacted by heavy accumulating snow and blowing snow. |
| Alert: | Winter Storm Warning |
| Area(s): | Northern Stillwater; Northern Big Horn; Southern Rosebud; Southern Big Horn; Northern Sweet Grass; Melville Foothills; Southwestern Yellowstone |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-12 @ 9:00 pm |
| Onset: | 2025-12-11 @ 6:00 pm -> 2025-12-12 @ 3:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Storm Warning issued December 11 at 2:22AM MST until December 12 at 8:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 4 and 9 inches, greatest north and east of Columbus. Winds gusting as high as 35 mph. * WHERE...Portions of south central and southeast Montana. * WHEN...From 5 PM this afternoon to 8 PM MST Friday. * IMPACTS...Travel will be very difficult with slick and snow covered roads, and areas of poor visibility. * ADDITIONAL DETAILS...Rapidly falling temperatures combined with rain changing to snow may result in a flash freeze on roadways late this afternoon and evening. Travel may become treacherous during this time. |
| Alert: | Winter Weather Advisory |
| Area(s): | Treasure; Northern Rosebud; Custer; Fallon; Powder River; Carter |
| Effective: | 2025-12-11 @ 3:22 am -> 2025-12-12 @ 6:00 am |
| Onset: | 2025-12-11 @ 6:00 pm -> 2025-12-12 @ 3:30 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 3:22 am |
| Headline: | Winter Weather Advisory issued December 11 at 2:22AM MST until December 12 at 5:00AM MST by NWS Billings MT |
| Description: |
* WHAT...For the Winter Weather Advisory, snow and poor travel conditions expected. Total snow accumulations up to one inch. Winds gusting as high as 30 mph. For the Winter Storm Watch, heavy snow possible. Additional snow accumulations between 5 and 9 inches possible. * WHERE...Portions of south central and southeast Montana. * WHEN...For the Winter Weather Advisory, from 5 PM this afternoon to 5 AM MST Friday. For the Winter Storm Watch, from late tonight through Saturday morning. * IMPACTS...Travel could be difficult late this afternoon and evening as rapidly falling temperatures combined with rain changing to snow may result in a flash freeze on some roads. Travel conditions will remain difficult into Saturday. * ADDITIONAL DETAILS...Expect snow to become widespread and heavier Friday and continue into Saturday. |
| Alert: | High Wind Warning |
| Area(s): | Judith Gap; Northern Sweet Grass; Melville Foothills; Southern Wheatland |
| Effective: | 2025-12-11 @ 2:09 am -> 2025-12-11 @ 6:00 pm |
| Onset: | 2025-12-11 @ 2:09 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 2:09 am |
| Headline: | High Wind Warning issued December 11 at 1:09AM MST until December 11 at 5:00PM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 60 to 70 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 US-191 from Big Timber through Harlowton, especially for high profile vehicles. * ADDITIONAL DETAILS...Winds will gradually decrease this afternoon. |
| Alert: | High Wind Warning |
| Area(s): | Livingston Area; Beartooth Foothills |
| Effective: | 2025-12-11 @ 2:09 am -> 2025-12-11 @ 6:00 pm |
| Onset: | 2025-12-11 @ 2:09 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 2:09 am |
| Headline: | High Wind Warning issued December 11 at 1:09AM MST until December 11 at 5:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Southwest winds gusting to 75 mph. * WHERE...Beartooth Foothills and Livingston Area. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel will be difficult, especially for high profile vehicles. This includes Interstate 90 from Livingston to Big Timber and roads along the Beartooth Foothills. * ADDITIONAL DETAILS...Winds will gradually decrease this afternoon. |
| Alert: | High Wind Warning |
| Area(s): | Northern Stillwater; Golden Valley |
| Effective: | 2025-12-11 @ 2:09 am -> 2025-12-11 @ 6:00 pm |
| Onset: | 2025-12-11 @ 6:00 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-11 @ 2:09 am |
| Headline: | High Wind Warning issued December 11 at 1:09AM MST until December 11 at 5:00PM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 50 to 60 mph expected. * WHERE...Golden Valley and Northern Stillwater. * WHEN...From 5 AM early this morning to 5 PM MST this afternoon. * IMPACTS...Strong crosswinds will make travel difficult. |
| Alert: | Flood Advisory |
| Area(s): | Lincoln, MT |
| Effective: | 2025-12-11 @ 1:33 am -> 2025-12-11 @ 6:00 pm |
| Onset: | 2025-12-11 @ 1:33 am -> 2025-12-11 @ 6:00 pm |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-11 @ 1:33 am |
| Headline: | Flood Advisory issued December 11 at 12:33AM MST until December 11 at 5:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Flooding caused by rain and snowmelt is occurring. * WHERE...A portion of northwest Montana, including the following county, Lincoln. * WHEN...Until 500 PM MST Thursday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 1233 AM MST, emergency management reported flooding in the advisory area. - https://www.weather.gov/mso/hydrology |
| Alert: | Wind Advisory |
| Area(s): | Kootenai/Cabinet Region; West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region |
| Effective: | 2025-12-10 @ 7:13 pm -> 2025-12-11 @ 9:00 am |
| Onset: | 2025-12-10 @ 7:13 pm -> 2025-12-11 @ 9:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-10 @ 7:13 pm |
| Headline: | Wind Advisory issued December 10 at 6:13PM MST until December 11 at 8:00AM MST by NWS Missoula MT |
| Description: |
* WHAT...Southwest winds 15 to 25 mph with gusts up to 60 mph. * WHERE...Flathead/Mission Valleys, Kootenai/Cabinet Region, West Glacier Region, and Potomac/Seeley Lake Region. * WHEN...Until 8 AM MST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. |
| Alert: | Flood Watch |
| Area(s): | Flathead, MT; Lake, MT; Lincoln, MT; Mineral, MT; Sanders, MT |
| Effective: | 2025-12-10 @ 1:24 pm -> 2025-12-11 @ 6:00 pm |
| Onset: | 2025-12-10 @ 1:24 pm -> 2025-12-11 @ 1:30 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2025-12-10 @ 1:24 pm |
| Headline: | Flood Watch issued December 10 at 12:24PM MST until December 11 at 5:00PM MST by NWS Missoula MT |
| Description: |
Heavy rain may fall on a deep primed snowpack leading to the melt increasing. Flows in rivers may increase quickly and reach critical levels. * WHAT...Flooding caused by rain and snowmelt continues to be possible. * WHERE...Portions of northwest and west central Montana, including the following counties, in northwest Montana, Flathead, Lake, Lincoln and Sanders. In west central Montana, Mineral. * WHEN...Through Thursday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. * ADDITIONAL DETAILS... - https://www.weather.gov/mso/hydrology |
| Alert: | Avalanche Warning |
| Area(s): | Kootenai/Cabinet Region |
| Effective: | 2025-12-10 @ 9:44 am |
| Onset: | 2025-12-10 @ 9:44 am -> 2025-12-11 @ 9:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Missoula MT on 2025-12-10 @ 9:44 am |
| Headline: | Avalanche Warning issued December 10 at 8:44AM MST by NWS Missoula MT |
| Description: |
AVWMSO The following message is transmitted at the request of Idaho Panhandle Avalanche Center Sandpoint ID. ...AVALANCHE WARNING ISSUED BY THE IDAHO PANHANDLE AVALANCHE CENTER... 07:00 PST Wed Dec 10 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 Wednesday 7 AM to Thursday 7 AM. Very dangerous avalanche conditions will reemerge from another round of heavy rain and strong winds - this time climbing up to 8,000 feet. It will be very easy to trigger avalanches large enough to bury or kill you, and many will release spontaneously. Avoid travel in avalanche terrain during this period. * WHERE...The Selkirk Mountains, and West and East Cabinet Mountains above 4,000 feet. * WHEN...In effect from Wed 07:00 PST to Thu 07:00 PST. * IMPACTS...The next potent atmospheric river will deliver copious amounts of rain to an already stressed snowpack across the mountains of North Idaho and Northwestern Montana. The rain line will spike to around 8,000 feet on Wednesday and quickly overload buried weak snow layers. It will be very likely for backcountry travelers to trigger dangerous avalanches and natural avalanches are likely. Avalanches will break wide across terrain features and run long distances to lower elevation slopes. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Travel in, near, or below 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. |
| Alert: | Avalanche Warning |
| Area(s): | Absaroka/Beartooth Mountains |
| Effective: | 2025-12-10 @ 6:37 am |
| Onset: | 2025-12-10 @ 6:37 am -> 2025-12-11 @ 6:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Billings MT on 2025-12-10 @ 6:37 am |
| Headline: | Avalanche Warning issued December 10 at 5:37AM MST by NWS Billings MT |
| Description: |
AVWBYZ 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. |