Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | West Glacier Region |
| Effective: | 2026-04-21 @ 2:50 pm -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-23 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-04-21 @ 2:50 pm |
| Headline: | Winter Weather Advisory issued April 21 at 1:50PM MDT until April 23 at 6:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations of 1 to 3 inches below 4000 feet, 4 to 7 inches at pass level and over 10 inches in the high terrain. * WHERE...Glacier National Park, Marias Pass, Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, and Polebridge. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * 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 morning and evening commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-04-21 @ 2:50 pm |
| Headline: | Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations of 2 and 5 inches in the valleys, 5 to 10 inches at pass level, and over 12 inches in the high terrain. Winds gusting as high as 35 mph. * WHERE...Georgetown Lake, Butte, Highway 12 Garrison to Elliston, MacDonald Pass, and Homestake Pass. * WHEN...From 6 PM Wednesday to noon MDT 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. 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 Thursday morning and evening commutes, especially over higher passes. * ADDITIONAL DETAILS...The most impactful snow accumulations are most likely to occur Thursday evening through Friday morning. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bitterroot/Sapphire Mountains |
| Effective: | 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-04-21 @ 2:50 pm |
| Headline: | Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of moderate winter weather impacts. Total snow accumulations of 1 to 5 inches below 4000 feet, 6 to 10 inches at pass level and over 12 inches in the high terrain. * WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass. * WHEN...From 6 PM Wednesday to noon MDT 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. The hazardous conditions could impact the Thursday morning and evening commutes, especially over higher passes. |
| Alert: | Winter Weather Advisory |
| Area(s): | Potomac/Seeley Lake Region |
| Effective: | 2026-04-21 @ 2:50 pm -> 2026-04-24 @ 1:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-24 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-04-21 @ 2:50 pm |
| Headline: | Winter Weather Advisory issued April 21 at 1:50PM MDT until April 24 at 12:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Snow expected. There is a likelihood of moderate to isolated major winter weather impacts. Total snow accumulations of 2 and 4 inches in the valleys and 6 to 12 inches in the mountains. * WHERE...Highway 200 Bonner to Greenough, I-90 East Missoula to Bearmouth, and Highway 83 Seeley Lake to Condon. * WHEN...From 6 PM Wednesday to noon MDT 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. 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 Thursday morning and evening commutes, especially over higher passes. * ADDITIONAL DETAILS...The most impactful snow accumulations are most likely to occur Thursday evening through Friday morning. |
| Alert: | High Wind Watch |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; Northern Phillips; Southwest Phillips; Northern Valley |
| Effective: | 2026-04-21 @ 2:46 pm -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-22 @ 7:15 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 2:46 pm |
| Headline: | High Wind Watch issued April 21 at 1:46PM MDT until April 23 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Phillips, Valley, Garfield, Petroleum Counties. * WHEN...From late Wednesday night through Thursday afternoon. * IMPACTS...High winds may move loose debris, damage property, and cause power bumps. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...These winds will make for hazardous conditions on area lakes. |
| Alert: | High Wind Watch |
| Area(s): | Daniels; Sheridan; Western Roosevelt; McCone; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt |
| Effective: | 2026-04-21 @ 2:46 pm -> 2026-04-24 @ 1:00 am |
| Onset: | 2026-04-23 @ 7:00 am -> 2026-04-22 @ 7:15 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 2:46 pm |
| Headline: | High Wind Watch issued April 21 at 1:46PM MDT until April 24 at 12:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Daniels, Dawson, Roosevelt, McCone, Prairie, Richland, Sheridan and Wibaux Counties. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...High winds may move loose debris, damage property, and cause power bumps. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...These winds will make for hazardous conditions on area lakes. |
| Alert: | Fire Weather Watch |
| Area(s): | Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties |
| Effective: | 2026-04-21 @ 2:15 pm -> 2026-04-22 @ 8:00 pm |
| Onset: | 2026-04-22 @ 1:00 pm -> 2026-04-22 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 2:15 pm |
| Headline: | Fire Weather Watch issued April 21 at 1:15PM MDT until April 22 at 7:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Fire Weather Watch, which is in effect from Wednesday afternoon through Wednesday evening. * AFFECTED AREA...Fire weather zones 120, 134, 135, 136, and 137. * WIND...Southwest then west at 20 to 30 mph. * HUMIDITY...Near 20 percent near the Canadian border to 10 to 15 percent south of Fort Peck Lake. * HIGHEST THREAT...Along and south of Highway 2. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Fire Weather Watch |
| Area(s): | Dawson/McCone/Prairie/Richland/Wibaux Counties |
| Effective: | 2026-04-21 @ 2:15 pm -> 2026-04-22 @ 8:00 pm |
| Onset: | 2026-04-22 @ 8:00 am -> 2026-04-22 @ 7:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 2:15 pm |
| Headline: | Fire Weather Watch issued April 21 at 1:15PM MDT until April 22 at 7:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Fire Weather Watch, which is in effect from Wednesday morning through Wednesday evening. * AFFECTED AREA...Fire weather zone 122. * WIND...South then southwest increasing to 20 to 30 mph. * HUMIDITY...as low as 10 to 15 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Winter Storm Watch |
| Area(s): | Little Belt and Highwood Mountains; Big Belt, Bridger and Castle Mountains; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-04-21 @ 12:33 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-21 @ 7:15 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-21 @ 12:33 am |
| Headline: | Winter Storm Watch issued April 20 at 11:33PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations between 4 and 10 inches, with isolated higher amounts possible. Winds could gust as high as 50 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From Wednesday evening through Thursday afternoon. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree or power line damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2026-04-21 @ 12:33 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-21 @ 7:15 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-21 @ 12:33 am |
| Headline: | Winter Storm Watch issued April 20 at 11:33PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy snow possible. Total snow accumulations of 3 to 8 inches, with isolated higher amounts possible. Winds could gust as high as 55 mph. * WHERE...Snowy and Judith Mountains, Fergus County below 4500ft, and Judith Basin County and Judith Gap. * WHEN...From late Wednesday night through Thursday afternoon. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Plan on slippery road conditions. Strong winds could cause tree or power line damage. |