Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Southern Clearwater Mountains; Bitterroot/Sapphire Mountains |
| Effective: | 2025-12-17 @ 2:24 pm -> 2025-12-20 @ 12:00 pm |
| Onset: | 2025-12-18 @ 2:00 pm -> 2025-12-18 @ 2:30 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-17 @ 2:24 pm |
| Headline: | Winter Weather Advisory issued December 17 at 1:24PM MST until December 20 at 11:00AM MST by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of minor to moderate winter weather impacts. Total snow accumulations between 9 and 15 inches in higher elevations and 5 to 9 inches at Lolo and Lost Trail Passes. Winds gusting as high as 40 mph. * WHERE...Dixie, Highway 12 Lowell to Lolo Pass, Highway 93 Sula to Lost Trail Pass, Lolo Pass, and Elk City. * WHEN...From 1 PM MST /noon PST/ Thursday to 11 AM MST /10 AM PST/ Saturday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Lower Clark Fork Region |
| Effective: | 2025-12-17 @ 2:24 pm -> 2025-12-20 @ 12:00 pm |
| Onset: | 2025-12-18 @ 2:00 pm -> 2025-12-18 @ 2:30 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-17 @ 2:24 pm |
| Headline: | Winter Weather Advisory issued December 17 at 1:24PM MST until December 20 at 11:00AM MST by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of minor to moderate winter weather impacts. Total snow accumulations 5 to 9 inches at Lookout Pass. Winds gusting as high as 35 mph. * WHERE...I-90 Lookout Pass to Haugan. * WHEN...From 1 PM Thursday to 11 AM MST Saturday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Storm Warning |
| Area(s): | West Glacier Region |
| Effective: | 2025-12-17 @ 2:24 pm -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 2:24 pm -> 2025-12-18 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-17 @ 2:24 pm |
| Headline: | Winter Storm Warning issued December 17 at 1:24PM MST until December 17 at 11:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Heavy snow. There is a likelihood of developing or ongoing major winter weather impacts. Additional snow accumulations up to one inch. Winds gusting as high as 55 mph. * WHERE...Marias Pass, Bad Rock Canyon, Highway 83 Bigfork to Swan Lake, Polebridge, Glacier National Park, and Essex. * WHEN...Until 11 PM MST this evening. * IMPACTS...Winter traveling conditions. For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Wednesday evening commute, especially over higher passes. Strong winds could cause tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Southern Clearwater Mountains; Bitterroot/Sapphire Mountains |
| Effective: | 2025-12-17 @ 1:43 pm -> 2025-12-20 @ 6:00 am |
| Onset: | 2025-12-18 @ 6:00 am -> 2025-12-17 @ 1:59 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Past |
| Issued By: | NWS Missoula MT on 2025-12-17 @ 1:43 pm |
| Headline: | The Winter Storm Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Description: |
The Winter Storm Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Alert: | Flood Advisory |
| Area(s): | Lincoln, MT |
| Effective: | 2025-12-17 @ 1:09 pm -> 2025-12-18 @ 1:00 pm |
| Onset: | 2025-12-17 @ 1:09 pm -> 2025-12-18 @ 1:00 pm |
| Severity: | Minor |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-17 @ 1:09 pm |
| Headline: | Flood Advisory issued December 17 at 12:09PM MST until December 18 at 12:00PM MST by NWS Missoula MT |
| Description: |
...The National Weather Service in Missoula has issued a Flood Advisory for the following rivers in Montana... Yaak River Near Troy affecting Lincoln County. For the Yaak River...including Near Troy...elevated river levels are forecast. * WHAT...Minor flooding caused by excessive rainfall is expected or ongoing. * WHERE...Yaak River near Near Troy. * WHEN...From this afternoon to early tomorrow afternoon. * 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 11:45 AM MST Wednesday the stage was 7.9 feet. - Bankfull stage is 7.5 feet. - Forecast...The river is expected to fall to 4.4 feet Saturday, December 27. - Action stage is 7.5 feet. - Flood stage is 8.0 feet. - https://www.weather.gov/mso/hydrology |
| Alert: | Civil Emergency Message |
| Area(s): | Lewis and Clark, MT; Pondera, MT; Teton, MT |
| Effective: | 2025-12-17 @ 1:05 pm |
| Onset: | 2025-12-17 @ 1:05 pm -> 2025-12-17 @ 5:00 pm |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 1:05 pm |
| Headline: | Civil Emergency Message issued December 17 at 12:05PM MST by NWS Great Falls MT |
| Description: |
CEMTFX The following message is transmitted at the request of the Lewis and Clark, Pondera, and Teton DES. ...DAMAGING AND DANGEROUS WINDS CONTINUE THIS AFTERNOON... Damaging winds will intensify along the Rocky Mountain Front and the Helena Valley through 4 PM this afternoon. Wind gusts in excess of 90 mph will be possible along the Rocky Mountain Front, with gusts near 80 possible across the Helena Valley. This system has a history of producing widespread power outages and repairs may not be possible until the winds subside overnight. Delay travel if possible. |
| Alert: | High Wind Warning |
| Area(s): | Central and Southern Valley; Daniels; Sheridan; Western Roosevelt; Richland; Northern Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2025-12-17 @ 4:15 am -> 2025-12-18 @ 4:00 am |
| Onset: | 2025-12-17 @ 9:00 am -> 2025-12-17 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-17 @ 4:15 am |
| Headline: | High Wind Warning issued December 17 at 3:15AM MST until December 18 at 3:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the High Wind Warning, west to northwest winds 35 to 50 mph with gusts up to 70 mph expected. For the Cold Weather Advisory, very cold wind chills as low as 30 below expected. * WHERE...Valley, Daniels, Roosevelt, Northern Phillips, Richland and Sheridan Counties. * WHEN...For the High Wind Warning, from 8 AM this morning to 3 AM MST Thursday. For the Cold Weather Advisory, from 10 PM this evening to 10 AM MST Thursday. * IMPACTS...High winds may move loose debris, damage property, and cause power bumps. Travel will be difficult, especially for high profile vehicles. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 20 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. |
| Alert: | High Wind Warning |
| Area(s): | Central and Southeast Phillips; Petroleum; Garfield; McCone; Dawson; Prairie; Wibaux; Southwest Phillips |
| Effective: | 2025-12-17 @ 4:15 am -> 2025-12-18 @ 4:00 am |
| Onset: | 2025-12-17 @ 9:00 am -> 2025-12-17 @ 6:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-17 @ 4:15 am |
| Headline: | High Wind Warning issued December 17 at 3:15AM MST until December 18 at 3:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...West winds 35 to 50 mph with gusts up to 75 mph expected. * WHERE...Central and Southern Phillips, Dawson, Garfield, McCone, Petroleum, Prairie and Wibaux Counties. * WHEN...From 8 AM this morning to 3 AM MST Thursday. * IMPACTS...High winds may move loose debris, damage property, and cause power bumps. Travel will be difficult, especially for high profile vehicles. |
| Alert: | Cold Weather Advisory |
| Area(s): | Central and Southern Valley; Daniels; Sheridan; Western Roosevelt; Richland; Northern Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2025-12-17 @ 4:15 am -> 2025-12-18 @ 11:00 am |
| Onset: | 2025-12-17 @ 11:00 pm -> 2025-12-17 @ 6:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-17 @ 4:15 am |
| Headline: | Cold Weather Advisory issued December 17 at 3:15AM MST until December 18 at 10:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...For the High Wind Warning, west to northwest winds 35 to 50 mph with gusts up to 70 mph expected. For the Cold Weather Advisory, very cold wind chills as low as 30 below expected. * WHERE...Valley, Daniels, Roosevelt, Northern Phillips, Richland and Sheridan Counties. * WHEN...For the High Wind Warning, from 8 AM this morning to 3 AM MST Thursday. For the Cold Weather Advisory, from 10 PM this evening to 10 AM MST Thursday. * IMPACTS...High winds may move loose debris, damage property, and cause power bumps. Travel will be difficult, especially for high profile vehicles. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 20 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. |
| Alert: | Blizzard Warning |
| Area(s): | Central and Southern Valley; Daniels; Sheridan; Western Roosevelt; McCone; Richland; Dawson; Northern Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2025-12-17 @ 4:08 am -> 2025-12-18 @ 7:00 am |
| Onset: | 2025-12-17 @ 5:00 pm -> 2025-12-17 @ 6:15 pm |
| Severity: | Extreme |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-17 @ 4:08 am |
| Headline: | Blizzard Warning issued December 17 at 3:08AM MST until December 18 at 6:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...Blizzard conditions expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 70 mph. * WHERE...A portion of northeast Montana. * WHEN...From 4 PM this afternoon to 6 AM MST Thursday. * IMPACTS...Plan on slippery road conditions and drifting snow. Areas of falling and blowing snow will significantly reduce visibility to near zero at times. * ADDITIONAL DETAILS...Areas of whiteout conditions are expected primarily in unsheltered and higher elevation locations. |
| Alert: | Winter Weather Advisory |
| Area(s): | Central and Southeast Phillips; Garfield; Prairie; Wibaux; Southwest Phillips |
| Effective: | 2025-12-17 @ 4:08 am -> 2025-12-18 @ 7:00 am |
| Onset: | 2025-12-17 @ 5:00 pm -> 2025-12-17 @ 6:15 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-17 @ 4:08 am |
| Headline: | Winter Weather Advisory issued December 17 at 3:08AM MST until December 18 at 6:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...Snow and blowing snow expected. Total snow accumulations up to one inch. Winds gusting as high as 75 mph. * WHERE...Central and Southern Phillips, Garfield, Prairie and Wibaux Counties. * WHEN...From 4 PM this afternoon to 6 AM MST Thursday. * IMPACTS...Plan on significantly reduced visibility and slippery road conditions. |
| Alert: | Winter Storm Watch |
| Area(s): | Absaroka/Beartooth Mountains |
| Effective: | 2025-12-17 @ 3:48 am -> 2025-12-20 @ 6:00 am |
| Onset: | 2025-12-18 @ 12:00 pm -> 2025-12-18 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:48 am |
| Headline: | Winter Storm Watch issued December 17 at 2:48AM MST until December 20 at 5:00AM MST by NWS Billings MT |
| Description: |
* WHAT...Periods of heavy snow possible. Total snow accumulations between 1 and 2 feet, greatest on west facing aspects. Winds could gust as high as 70 mph. * WHERE...Absaroka/Beartooth Mountains. * WHEN...From Thursday morning through late Friday night. * IMPACTS...Recreation in the high country could be impacted by heavy accumulating snow and blowing snow. Avalanche danger may increase. |
| Alert: | High Wind Warning |
| Area(s): | Northern Rosebud; Custer; Fallon; Powder River; Carter; Southern Rosebud |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 6:00 am |
| Onset: | 2025-12-17 @ 12:00 pm -> 2025-12-18 @ 3:45 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 5:00AM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 60 to 70 mph expected. * WHERE...A portion of southeast Montana. * WHEN...From 11 AM this morning to 5 AM MST Thursday. * IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. Secure loose outdoor items. * ADDITIONAL DETAILS...Areas of light snow are expected tonight, which combined with the strong winds could lead to blowing snow and reduced visibility. |
| Alert: | High Wind Warning |
| Area(s): | Musselshell; Treasure; Northern Stillwater; Golden Valley; Northern Big Horn; Southeastern Carbon; Northern Carbon; Northeastern Yellowstone; Southwestern Yellowstone |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 9:00 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 60 to 70 mph expected. * WHERE...Portions of central and south central Montana. * WHEN...From 8 AM this morning to 2 AM MST Thursday. * IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. Secure loose outdoor items. * ADDITIONAL DETAILS...Highest gusts will be in the afternoon and evening. |
| Alert: | High Wind Warning |
| Area(s): | Southern Big Horn; Bighorn Canyon; Sheridan Foothills |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...Southwest to west winds gusts 55 to 70 mph expected. * WHERE...In Montana, Bighorn Canyon and Southern Big Horn. In Wyoming, Sheridan Foothills. * WHEN...Until 2 AM MST Thursday. * IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. This includes travel on I-90 through Sheridan. Secure loose outdoor items. * ADDITIONAL DETAILS...Winds through this morning will be erratic, with periodic strong winds surging down the mountain slopes. Afternoon and evening winds will be out of the west to northwest and steadier. |
| Alert: | High Wind Warning |
| Area(s): | Judith Gap; Northern Sweet Grass; Melville Foothills; Southern Wheatland |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 65 to 75 mph expected. * WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. * WHEN...Until 2 AM MST Thursday. * IMPACTS...Strong crosswinds will make travel difficult along Highway 191 from Big Timber through Judith Gap. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items. |
| Alert: | High Wind Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting to 85 mph expected. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...Until 2 AM MST Thursday. * IMPACTS...Recreation in the high country will be difficult due to high winds and blowing snow over the exposed higher peaks. |
| Alert: | High Wind Warning |
| Area(s): | Northern Park |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 17 at 11:00PM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting 50 to 60 mph expected. * WHERE...Northern Park. * WHEN...Until 11 PM MST this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds are expected this afternoon and evening. |
| Alert: | High Wind Warning |
| Area(s): | Livingston Area; Beartooth Foothills |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 17 at 11:00PM MST by NWS Billings MT |
| Description: |
* WHAT...West winds gusting near 80 mph expected. * WHERE...Beartooth Foothills and Livingston Area. * WHEN...Until 11 PM MST this evening. * IMPACTS...Strong crosswinds will make travel difficult, especially for high profile vehicles, on Interstate 90 from Livingston to Big Timber and roads along the Beartooth Foothills. The highest gusts may cause damage to trees, power lines and some structures. Secure loose outdoor items. |
| Alert: | High Wind Warning |
| Area(s): | Paradise Valley |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 12:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 17 at 11:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Southwest winds gusting 55 to 65 mph expected. * WHERE...Paradise Valley. * WHEN...Until 11 PM MST this evening. * IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult on Highway 89 through the Paradise Valley, especially for high profile vehicles. * ADDITIONAL DETAILS...Strongest winds are expected through this afternoon and early evening. |
| Alert: | High Wind Warning |
| Area(s): | Red Lodge Foothills |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...Southwest to west winds gusting 60 to 70 mph expected. * WHERE...Red Lodge Foothills. * WHEN...Until 2 AM MST Thursday. * IMPACTS...Damaging winds could blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. Secure loose outdoor items. * ADDITIONAL DETAILS...Winds through this morning will be erratic, with periodic strong winds surging down the mountain slopes. Afternoon and evening winds will be out of the west to northwest and steadier. |
| Alert: | High Wind Warning |
| Area(s): | Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains |
| Effective: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Onset: | 2025-12-17 @ 3:41 am -> 2025-12-18 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-17 @ 3:41 am |
| Headline: | High Wind Warning issued December 17 at 2:41AM MST until December 18 at 2:00AM MST by NWS Billings MT |
| Description: |
* WHAT...West winds with gusts 65 to 75 mph expected. * WHERE...In Montana, Pryor/Northern Bighorn Mountains. In Wyoming, Northeast Bighorn Mountains. * WHEN...Until 2 AM MST Thursday. * IMPACTS...Damaging winds may blow down trees and power lines. Travel will be difficult, especially for high profile vehicles. Recreation in the high country will be difficult. |
| Alert: | High Wind Warning |
| Area(s): | Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Little Belt and Highwood Mountains; Helena Valley; Big Belt, Bridger and Castle Mountains; Meagher County Valleys; Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2025-12-17 @ 3:30 am -> 2025-12-18 @ 1:00 am |
| Onset: | 2025-12-17 @ 4:00 am -> 2025-12-17 @ 5:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 3:30 am |
| Headline: | High Wind Warning issued December 17 at 2:30AM MST until December 18 at 12:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 35 to 45 mph with gusts up to 75 mph expected. Isolated gusts in excess of 85 mph will be possible in wind prone areas. * WHERE...Portions of central and southwest Montana. * WHEN...Until midnight MST tonight. * IMPACTS...Travel will be very difficult, especially for high profile vehicles. Damaging winds will blow down trees and power lines. Power outages are expected. Isolated blowing snow in the mountains and dust at lower elevations will cause areas of poor visibility. * ADDITIONAL DETAILS...This is a dangerous situation! This windstorm will be reminiscent of the January 2021 windstorm. |
| Alert: | High Wind Warning |
| Area(s): | Eastern Toole and Liberty; Hill County; Northern Blaine County; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2025-12-17 @ 3:30 am -> 2025-12-18 @ 1:00 am |
| Onset: | 2025-12-17 @ 4:00 am -> 2025-12-17 @ 5:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 3:30 am |
| Headline: | High Wind Warning issued December 17 at 2:30AM MST until December 18 at 12:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 40 to 50 mph with gusts up to 75 mph expected. Isolated wind gusts in excess of 85 mph are possible. * WHERE...The Plains and Island Ranges of North Central Montana. * WHEN...Until midnight MST tonight. * IMPACTS...Travel will be difficult to impossible, especially for high profile vehicles. Damaging winds will blow down trees and power lines. Power outages are expected and may be of long duration. Blowing dust could significantly reduce visibility at times. * ADDITIONAL DETAILS...This is a dangerous situation! This windstorm will be reminiscent of the January 2021 windstorm. |
| Alert: | High Wind Warning |
| Area(s): | East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Southern Rocky Mountain Front; Southern High Plains |
| Effective: | 2025-12-17 @ 3:30 am -> 2025-12-18 @ 1:00 am |
| Onset: | 2025-12-17 @ 4:00 am -> 2025-12-17 @ 5:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 3:30 am |
| Headline: | High Wind Warning issued December 17 at 2:30AM MST until December 18 at 12:00AM MST by NWS Great Falls MT |
| Description: |
* WHAT...West winds 35 to 55 mph with gusts up to 90 mph expected and gusts over 100 mph possible, especially close to the Rocky Mountain Front. * WHERE...The Rocky Mountain Front and adjacent foothills and plains, and Eastern Glacier, Western Toole, and Central Pondera Counties. * WHEN...Until midnight MST tonight. * IMPACTS...Travel will be very difficult to impossible! Damaging winds will blow down trees and power lines. Power outages are expected and could be of long duration. Blowing dust could significantly reduce visibility at times. * ADDITIONAL DETAILS...This is a dangerous situation! This windstorm will be reminiscent of the January 2021 windstorm. |
| Alert: | Winter Storm Warning |
| Area(s): | East Glacier Park Region; Southern Rocky Mountain Front |
| Effective: | 2025-12-17 @ 3:26 am -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 3:26 am -> 2025-12-17 @ 5:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 3:26 am |
| Headline: | Winter Storm Warning issued December 17 at 2:26AM MST until December 17 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...Snow with a period of heavy snow this morning. Total snow accumulations between 3 and 8 inches at Marias Pass with higher amounts over the mountains in Glacier National Park. Winds could gust over 70 mph at times. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult to dangerous and tire chains may be required for some vehicles. Visibility may drop below 1/4 mile at times due to falling and blowing snow. Those in the backcountry should ensure they are prepared for dangerous conditions. |
| Alert: | Winter Weather Advisory |
| Area(s): | Little Belt and Highwood Mountains; Northwest Beaverhead County; Ruby Mountains and Southern Beaverhead Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2025-12-17 @ 3:26 am -> 2025-12-18 @ 12:00 am |
| Onset: | 2025-12-17 @ 3:26 am -> 2025-12-17 @ 5:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-17 @ 3:26 am |
| Headline: | Winter Weather Advisory issued December 17 at 2:26AM MST until December 17 at 11:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...Snow. Additional snow accumulations up to 4 inches. Winds gusting as high as 75 mph. * WHERE...The Mountains of Southwestern Montana south of Interstate 90, and Little Belt and Highwood Mountains. * WHEN...Until 11 PM MST this evening. * IMPACTS...Plan on slippery road conditions developing this morning over mountain passes. Blowing snow could significantly reduce visibility. Very strong winds could cause extensive tree damage. |
| Alert: | High Wind Warning |
| Area(s): | Butte/Blackfoot Region; Potomac/Seeley Lake Region |
| Effective: | 2025-12-16 @ 11:26 am -> 2025-12-17 @ 9:00 pm |
| Onset: | 2025-12-17 @ 3:00 am -> 2025-12-17 @ 11:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-16 @ 11:26 am |
| Headline: | High Wind Warning issued December 16 at 10:26AM MST until December 17 at 8:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...West winds 30 to 40 mph with gusts up to 70 mph expected. Gusts greater than 80 mph could be experienced from Garrison Junction to MacDonald Pass and Deer Lodge to Anaconda. * WHERE...Butte/Blackfoot Region and Potomac/Seeley Lake Region. * WHEN...From 2 AM to 8 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Missoula/Bitterroot Valleys; Bitterroot/Sapphire Mountains |
| Effective: | 2025-12-16 @ 11:26 am -> 2025-12-17 @ 6:00 pm |
| Onset: | 2025-12-17 @ 3:00 am -> 2025-12-17 @ 11:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-16 @ 11:26 am |
| Headline: | High Wind Warning issued December 16 at 10:26AM MST until December 17 at 5:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Southwest winds 30 to 40 mph with gusts up to 70 mph expected. West to East canyons could have gusts greater than 80 mph from Florence to Corvallis and Charlos Heights to Conner. * WHERE...Bitterroot/Sapphire Mountains and Missoula/Bitterroot Valleys. * WHEN...From 2 AM to 5 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Kootenai/Cabinet Region; Flathead/Mission Valleys; Lower Clark Fork Region |
| Effective: | 2025-12-16 @ 11:26 am -> 2025-12-17 @ 6:00 pm |
| Onset: | 2025-12-17 @ 3:00 am -> 2025-12-17 @ 11:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-16 @ 11:26 am |
| Headline: | High Wind Warning issued December 16 at 10:26AM MST until December 17 at 5:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Southwest winds 25 to 35 mph with gusts up to 65 mph expected. * WHERE...Flathead/Mission Valleys, Kootenai/Cabinet Region, and Lower Clark Fork Region. * WHEN...From 2 AM to 5 PM MST Wednesday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. |
| Alert: | Flash Flood Watch |
| Area(s): | Kootenai/Cabinet Region |
| Effective: | 2025-12-14 @ 9:22 pm -> 2025-12-17 @ 3:00 pm |
| Onset: | 2025-12-14 @ 9:22 pm -> 2025-12-17 @ 3:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2025-12-14 @ 9:22 pm |
| Headline: | Flash Flood Watch issued December 14 at 8:22PM MST until December 17 at 2:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Flash Flooding caused by a potential failure of the Lower Flower Creek Diversion Structure related to additional rainfall early this week. Officials are currently working to mitigate this potential hazard by releasing additional water to take pressure off the diversion structure; these water flows are expected to stay below peak levels during the flood event last Thursday. * WHERE...Libby, MT. * WHEN...Through Wednesday afternoon. * IMPACTS...A failure of the diversion structure may result in flooding of urban areas. * ADDITIONAL DETAILS... - Recent heavy rain caused damage to the Lower Flower Creek Diversion Structure. Forecast rainfall has the potential to cause additional damage to the structure, bringing the risk for uncontrolled water released into the town of Libby. The main Flower Creek Dam is stable and functioning as designed. - https://www.weather.gov/mso/hydrology |