Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Pryor/Northern Bighorn Mountains |
| Effective: | 2025-12-04 @ 4:43 am -> 2025-12-05 @ 3:00 pm |
| Onset: | 2025-12-04 @ 6:00 pm -> 2025-12-05 @ 4:45 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-04 @ 4:43 am |
| Headline: | Winter Weather Advisory issued December 4 at 3:43AM 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 Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains; Crazy Mountains |
| Effective: | 2025-12-04 @ 4:43 am -> 2025-12-06 @ 3:00 pm |
| Onset: | 2025-12-04 @ 3:00 pm -> 2025-12-05 @ 4:45 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2025-12-04 @ 4:43 am |
| Headline: | Winter Storm Warning issued December 4 at 3:43AM 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...From 2 PM this afternoon to 2 PM MST Saturday. * IMPACTS...Recreation in the backcountry will be impacted by heavy accumulating snow and blowing snow. * 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 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 @ 3:19 am -> 2025-12-06 @ 6:00 am |
| Onset: | 2025-12-04 @ 12:00 pm -> 2025-12-04 @ 6:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 3:19 am |
| Headline: | Winter Storm Warning issued December 4 at 2:19AM MST until December 6 at 5:00AM MST by NWS Great Falls MT |
| Description: |
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES THROUGH THE SATURDAY... .A series of winter storms will begin to push into North Central and Southwestern Montana today, with snow beginning over the higher terrain early this afternoon. Today's snowfall will focus on the Mountains of Central and South-Central Montana, with 4 to 8 inches over both Kings Hill and Bozeman Passes today, with higher amounts above pass level. A period of lighter snowfall is expected Friday morning and afternoon, with more widespread heavy snow returning to the area around sunset Friday. Snow will continue across the area Friday night into Saturday evening, with an additional 6 to 12 inches expected over the passes and higher amounts above pass level. * WHAT...Heavy snow expected. Snowfall totals of 4 to 8 inches at pass level through tonight with an additional 5 to 12 inches at and above pass level Friday and Saturday. Total snow accumulations between 10 and 20 inches. Winds gusting as high as 40 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 11 AM this morning to 5 AM 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): | East Glacier Park Region; Southern Rocky Mountain Front; Northwest Beaverhead County |
| Effective: | 2025-12-04 @ 3:19 am -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-05 @ 6:00 am -> 2025-12-04 @ 6:30 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2025-12-04 @ 3:19 am |
| Headline: | Winter Storm Watch issued December 4 at 2:19AM 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... .A series of winter storms will begin to push into North Central and Southwestern Montana today, with snow beginning over the higher terrain early this afternoon. Today's snowfall will focus on the Mountains of Central and South-Central Montana, with 4 to 8 inches over both Kings Hill and Bozeman Passes today, with higher amounts above pass level. A period of lighter snowfall is expected Friday morning and afternoon, with more widespread heavy snow returning to the area around sunset Friday. Snow will continue across the area Friday night into Saturday evening, with an additional 6 to 12 inches expected 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 40 mph. * WHERE...The Continental Divide along the Rocky Mountain Front, and Northwest Beaverhead County. * WHEN...From late tonight through Saturday afternoon. * 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. |
| Alert: | Winter Storm Watch |
| Area(s): | Northern Clearwater Mountains; Southern Clearwater Mountains; West Glacier Region; Lower Clark Fork Region; Bitterroot/Sapphire Mountains; Potomac/Seeley Lake Region |
| Effective: | 2025-12-03 @ 2:26 pm -> 2025-12-06 @ 6:00 pm |
| Onset: | 2025-12-05 @ 6:00 am -> 2025-12-05 @ 6:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2025-12-03 @ 2:26 pm |
| Headline: | Winter Storm Watch issued December 3 at 1:26PM MST until December 6 at 5:00PM MST by NWS Missoula MT |
| Description: |
* WHAT...Heavy mixed precipitation possible. There is a chance of moderate to major winter weather impacts. Total snow accumulations of 3 to 7 inches along valley bottoms, 7 to 15 inches at mountain pass level, and 24 to 36 inches along mountain crests. Ice accumulations around a light glaze possible. * WHERE...In IDAHO, Northern Clearwater Mountains and Southern Clearwater Mountains. In MONTANA, West Glacier Region, Bitterroot/Sapphire Mountains, Lower Clark Fork Region, and Potomac/Seeley Lake Region. * WHEN...From late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday morning and evening commutes, especially over higher passes. |