Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Elkhorn and Boulder Mountains |
| Effective: | 2025-12-04 @ 2:46 pm -> 2025-12-05 @ 12:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 6:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 2:46 pm |
| Headline: | Winter Weather Advisory issued December 4 at 1:46PM MST until December 5 at 11:00AM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .The first round of heavy snow is expected to last through early Friday morning and will primarily focus on the mountains of central and southwest Montana with 4 to 8 inches possible along the mountain passes including Bozeman and Kings Hill Pass. A period of lighter snowfall is expected Friday morning and afternoon. The second and more widespread round of heavier snowfall is expected to arrive Friday evening and continue into Saturday evening with an additional 6 to 12 inches possible over the passes and higher amounts above pass level. * WHAT...Snow expected. Total snow accumulations between 2 and 6 inches. * WHERE...Elkhorn and Boulder Mountains. * WHEN...From 5 PM this afternoon to 11 AM MST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening and Friday morning commutes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Gallatin Valley |
| Effective: | 2025-12-04 @ 2:46 pm -> 2025-12-05 @ 12:00 pm |
| Onset: | 2025-12-04 @ 5:00 pm -> 2025-12-05 @ 6:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 2:46 pm |
| Headline: | Winter Weather Advisory issued December 4 at 1:46PM MST until December 5 at 11:00AM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .The first round of heavy snow is expected to last through early Friday morning and will primarily focus on the mountains of central and southwest Montana with 4 to 8 inches possible along the mountain passes including Bozeman and Kings Hill Pass. A period of lighter snowfall is expected Friday morning and afternoon. The second and more widespread round of heavier snowfall is expected to arrive Friday evening and continue into Saturday evening with an additional 6 to 12 inches possible over the passes and higher amounts above pass level. * WHAT...Snow expected. Total snow accumulations between 2 and 4 inches. * WHERE...Gallatin Valley. * WHEN...From 4 PM this afternoon to 11 AM MST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening and Friday morning commutes. * ADDITIONAL DETAILS...There will be a lull in the snow Friday afternoon with another round of snow expected Friday evening into Saturday afternoon. |
| Alert: | Winter Storm Watch |
| Area(s): | East Glacier Park Region; Southern Rocky Mountain Front |
| Effective: | 2025-12-04 @ 2:46 pm -> 2025-12-07 @ 9:00 am |
| Onset: | 2025-12-05 @ 6:00 pm -> 2025-12-05 @ 6:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 2:46 pm |
| Headline: | Winter Storm Watch issued December 4 at 1:46PM MST until December 7 at 8:00AM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .The first round of heavy snow is expected to last through early Friday morning and will primarily focus on the mountains of central and southwest Montana with 4 to 8 inches possible along the mountain passes including Bozeman and Kings Hill Pass. A period of lighter snowfall is expected Friday morning and afternoon. The second and more widespread round of heavier snowfall is expected to arrive Friday evening and continue into Saturday evening with an additional 6 to 12 inches possible over the passes and higher amounts above pass level. * WHAT...Heavy snow possible. Total snow accumulations between 6 and 12 inches possible. Winds could gust as high as 55 mph. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage. |
| Alert: | Winter Storm Warning |
| Area(s): | Northwest Beaverhead County |
| Effective: | 2025-12-04 @ 2:46 pm -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 6:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 2:46 pm |
| Headline: | Winter Storm Warning issued December 4 at 1:46PM MST until December 6 at 5:00PM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .The first round of heavy snow is expected to last through early Friday morning and will primarily focus on the mountains of central and southwest Montana with 4 to 8 inches possible along the mountain passes including Bozeman and Kings Hill Pass. A period of lighter snowfall is expected Friday morning and afternoon. The second and more widespread round of heavier snowfall is expected to arrive Friday evening and continue into Saturday evening with an additional 6 to 12 inches possible over the passes and higher amounts above pass level. * WHAT...Heavy snow expected. Snowfall totals between 2 and 6 inches in the Big Hole Valley and between 8 and 15 inches at pass level. Winds gusting as high as 40 mph. * WHERE...Northwest Beaverhead County. * WHEN...From 5 PM this afternoon to 5 PM MST Saturday. * IMPACTS...Travel could be very difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions. Gusty winds could bring down tree branches. |
| Alert: | Winter Storm Warning |
| Area(s): | Little Belt and Highwood Mountains; Big Belt, Bridger and Castle Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2025-12-04 @ 2:46 pm -> 2025-12-06 @ 3:00 pm |
| Onset: | 2025-12-04 @ 2:46 pm -> 2025-12-05 @ 6:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 2:46 pm |
| Headline: | Winter Storm Warning issued December 4 at 1:46PM MST until December 6 at 2:00PM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .The first round of heavy snow is expected to last through early Friday morning and will primarily focus on the mountains of central and southwest Montana with 4 to 8 inches possible along the mountain passes including Bozeman and Kings Hill Pass. A period of lighter snowfall is expected Friday morning and afternoon. The second and more widespread round of heavier snowfall is expected to arrive Friday evening and continue into Saturday evening with an additional 6 to 12 inches possible over the passes and higher amounts above pass level. * WHAT...Heavy snow expected. Snowfall totals between 8 and 12 inches at pass level and up to 24 inches above pass level. Winds gusting as high as 45 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Travel could be very difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions. * ADDITIONAL DETAILS...Significant travel impacts to the Thursday and Friday commutes are possible for Bozeman Pass and along Highway 191 south of Bozeman. |
| Alert: | Winter Storm Watch |
| Area(s): | West Glacier Region |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-07 @ 9:00 am |
| Onset: | 2025-12-05 @ 6:00 pm -> 2025-12-05 @ 2:15 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Storm Watch issued December 4 at 1:02PM MST until December 7 at 8:00AM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Heavy snow possible. There is a chance of moderate to major winter weather impacts. Total snow accumulations between 10 and 25 inches possible. Winds could gust as high as 40 mph. * WHERE...Marias Pass, Highway 83 Bigfork to Swan Lake, Polebridge, Glacier National Park, Bad Rock Canyon, and Essex. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...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 Friday evening commute, especially over higher passes. |
| Alert: | Winter Storm Warning |
| Area(s): | Lower Clark Fork Region |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 2:15 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Storm Warning issued December 4 at 1:02PM MST until December 6 at 5:00PM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Heavy snow expected. There is a likelihood of major winter weather impacts. Total snow accumulations of 1 to 4 inches in the valleys and 8 to 14 inches in the higher terrain including Lookout Pass and Evaro Hill. * WHERE...I-90 Lookout Pass to Haugan, Highway 200 Thompson Falls to Plains, Highway 200 Trout Creek to Heron, and Evaro Hill. * WHEN...From 5 PM this afternoon to 5 PM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Storm Warning |
| Area(s): | Potomac/Seeley Lake Region |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 2:15 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Storm Warning issued December 4 at 1:02PM MST until December 6 at 5:00PM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Heavy Snow expected. There is a likelihood of major winter weather impacts. Total snow accumulations between 5 to 10 inches. * WHERE...Highway 83 Seeley Lake to Condon, I-90 East Missoula to Bearmouth, and Highway 200 Bonner to Greenough. * WHEN...From 5 PM this afternoon to 5 PM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Storm Warning |
| Area(s): | Bitterroot/Sapphire Mountains |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 2:15 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Storm Warning issued December 4 at 1:02PM MST until December 6 at 5:00PM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Heavy snow expected. There is a likelihood of major winter storm impacts. Total snow accumulations 1 to 5 inches in the valleys and 8 to 15 inches in the higher terrain including Lolo and Lost Trail Passes. Winds gusting as high as 40 mph on Friday. * WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass. * WHEN...From 5 PM this afternoon to 5 PM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Flathead/Mission Valleys |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-05 @ 12:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 12:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Weather Advisory issued December 4 at 1:02PM MST until December 5 at 11:00AM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations up to 4 inches mainly in the Mission Valley. * WHERE...Flathead Valley, Mission Valley, Polson, and Flathead Lake. * WHEN...From 5 PM this afternoon to 11 AM MST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Missoula/Bitterroot Valleys |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-05 @ 12:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 12:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Weather Advisory issued December 4 at 1:02PM MST until December 5 at 11:00AM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations up to 3 inches mainly in the Missoula Valley and benches in the Bitterroot Valley. * WHERE...Missoula and Bitterroot Valley. * WHEN...From 5 PM this afternoon to 11 AM MST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2025-12-04 @ 2:02 pm -> 2025-12-05 @ 12:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 12:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2025-12-04 @ 2:02 pm |
| Headline: | Winter Weather Advisory issued December 4 at 1:02PM MST until December 5 at 11:00AM MST by NWS Missoula MT |
| Description: |
...PROLONGED SNOW EVENT... .A plume of snow will continue to impacted north central Idaho into west central and southwest Montana tonight. The snow activity will decrease in intensity during the day on Friday, then a second plume of precipitation will impact the region late Friday through Saturday. * WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations up to 6 inches. * WHERE...Highway 12 Garrison to Elliston, MacDonald Pass, Butte, Georgetown Lake, and Homestake Pass. * WHEN...From 5 PM this afternoon to 11 AM MST Friday. * 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. |
| Alert: | Winter Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2025-12-04 @ 1:56 pm -> 2025-12-06 @ 3:00 pm |
| Onset: | 2025-12-04 @ 3:00 pm -> 2025-12-05 @ 2:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-04 @ 1:56 pm |
| Headline: | Winter Storm Warning issued December 4 at 12:56PM MST until December 6 at 2:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Periods of moderate to heavy snow expected. Total snow accumulations between 12 and 24 inches, greatest on west facing slopes where locally higher amounts are possible. Winds gusting as high as 45 mph. * WHERE...Absaroka/Beartooth Mountains and Crazy Mountains. * WHEN...Until 2 PM MST Saturday. * IMPACTS...Recreation in the backcountry will be impacted by heavy accumulating snow and blowing snow. Localized whiteout conditions are possible. * ADDITIONAL DETAILS...Snowfall amounts on the northeast facing slopes around Nye to Red Lodge are much less, around 3 to 6 inches. A temporary break in the snowfall is expected Friday. |
| Alert: | Winter Weather Advisory |
| Area(s): | Pryor/Northern Bighorn Mountains |
| Effective: | 2025-12-04 @ 1:56 pm -> 2025-12-05 @ 3:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 2:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-04 @ 1:56 pm |
| Headline: | Winter Weather Advisory issued December 4 at 12:56PM MST until December 5 at 2:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches, greatest on northwest facing slopes. Winds gusting as high as 30 mph. * WHERE...Pryor/Northern Bighorn Mountains. * WHEN...From 5 PM this afternoon to 2 PM MST Friday. * IMPACTS...Recreation in the backcountry will be impacted by heavy accumulating snow and blowing snow. * ADDITIONAL DETAILS...Those in the backcountry should ensure they are prepared for dangerous winter conditions. |
| Alert: | Winter Weather Advisory |
| Area(s): | Richland; Dawson; Eastern Roosevelt |
| Effective: | 2025-12-04 @ 10:45 am -> 2025-12-05 @ 6:00 am |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 5:15 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2025-12-04 @ 10:45 am |
| Headline: | Winter Weather Advisory issued December 4 at 9:45AM MST until December 5 at 5:00AM MST by NWS Glasgow MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 35 mph. * WHERE...Dawson, Eastern Roosevelt, and Richland Counties. * WHEN...From 5 PM this afternoon to 5 AM MST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening commute. |