Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Storm Warning |
| Area(s): | Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Storm Warning issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy wet snow expected. Total snow accumulations between 5 and 12 inches, with higher amounts over the mountain peaks. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * 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...The heavy, wet snow may cause instances of power outages and or tree damage. |
| Alert: | Winter Storm Watch |
| Area(s): | Gallatin Valley |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-24 @ 1:00 pm |
| Onset: | 2026-04-23 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Storm Watch issued April 21 at 11:56PM MDT until April 24 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow possible. Total snow accumulations between 2 and 8 inches possible, highest over the south and east portions of the Gallatin Valley. * WHERE...Gallatin Valley. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. The hazardous conditions could impact the Thursday evening and Friday morning commutes. * ADDITIONAL DETAILS...The heavy, wet snow may cause instances of power outages and or tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | Southern Rocky Mountain Front; Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Elkhorn and Boulder Mountains; Northwest Beaverhead County; Ruby Mountains and Southern Beaverhead Mountains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-24 @ 1:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Weather Advisory issued April 21 at 11:56PM MDT until April 24 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Wet snow expected. Total snow accumulations between 3 and 8 inches, with higher amounts over the mountain peaks. Winds gusting as high as 40 mph. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From 6 PM Wednesday to noon MDT Friday. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. Falling and or blowing snow may significantly reduce visibility at times. Tire chains may be required for some vehicles if traveling through mountain passes. Those with outdoor plans should be prepared for dangerous outdoor conditions. * ADDITIONAL DETAILS...The wet snow may cause isolated instances of power outages and or tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | East Glacier Park Region; Northern High Plains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Weather Advisory issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Wet snow expected. Total snow accumulations up to 3 inches over the plains and between 2 and 6 inches at Marias Pass. Accumulations will be in excess of 6 inches over the higher terrain of Glacier National Park. Winds gusting as high as 45 mph. * WHERE...Eastern Glacier National Park and adjacent foothills and plains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. Falling and or blowing snow may significantly reduce visibility at times. Tire chains may be required for some vehicles if traveling through mountain passes. Those with outdoor plans should be prepared for dangerous outdoor conditions. |
| Alert: | Winter Storm Watch |
| Area(s): | Judith Basin County and Judith Gap |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-22 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Storm Watch issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Blizzard conditions possible. Total snow accumulations of 2 to 8 inches possible. Winds could gust as high as 50 mph. * WHERE...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. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...The heavy, wet snow may cause instances of power outages. |
| Alert: | Winter Storm Watch |
| Area(s): | Little Belt and Highwood Mountains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Storm Watch issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Heavy, wet snow possible. Total snow accumulations between 5 and 11 inches, with higher amounts over the mountain peaks. Winds could gust as high as 50 mph, highest for northern areas. * WHERE...Little Belt and Highwood Mountains. * WHEN...From Wednesday evening through Thursday afternoon. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. Falling and or blowing snow may significantly reduce visibility below a quarter mile at times. Tire chains may be required for some vehicles if traveling through mountain passes. Those with outdoor plans should be prepared for dangerous outdoor conditions. * ADDITIONAL DETAILS...The heavy, wet snow may cause instances of power outages and or tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-22 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Weather Advisory issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations between 5 and 9 inches, with higher amounts over the mountain peaks. Winds gusting as high as 50 mph. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. Gusty winds could bring down tree branches. |
| Alert: | Winter Weather Advisory |
| Area(s): | Bears Paw Mountains and Southern Blaine |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-22 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Weather Advisory issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...wet snow expected. Total snow accumulations between 2 and 6 inches over the Bears Paw Mountains. Winds gusting over 50 mph at times. * WHERE...Bears Paw Mountains and Southern Blaine. * WHEN...From midnight Wednesday Night to 6 PM MDT Thursday. * IMPACTS...Expect difficult driving conditions due to slush or snow covered roadways. Falling and or blowing snow may significantly reduce visibility at times. * ADDITIONAL DETAILS...The wet snow may cause instances of power outages and or tree damage. |
| Alert: | Winter Weather Advisory |
| Area(s): | Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2026-04-22 @ 12:56 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-22 @ 4:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:56 am |
| Headline: | Winter Weather Advisory issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations up to 3 inches, with up to 12 inches expected on mountain peaks. Winds gusting as high as 55 mph. * WHERE...Snowy and Judith Mountains and Fergus County below 4500ft. * WHEN...From midnight Wednesday Night to 6 PM MDT Thursday. * IMPACTS...Plan on slippery road conditions. Strong winds could cause tree damage. |
| Alert: | Winter Storm Warning |
| Area(s): | Absaroka/Beartooth Mountains |
| Effective: | 2026-04-22 @ 12:28 am -> 2026-04-24 @ 7:00 am |
| Onset: | 2026-04-22 @ 7:00 pm -> 2026-04-23 @ 12:30 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-04-22 @ 12:28 am |
| Headline: | Winter Storm Warning issued April 21 at 11:28PM MDT until April 24 at 6:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Heavy snow expected. Total snow accumulations between 8 and 15 inches. Winds gusting as high as 60 mph. * WHERE...Absaroka/Beartooth Mountains. * WHEN...From 6 PM Wednesday to 6 AM MDT Friday. * IMPACTS...Recreation in the high country will be impacted by heavy accumulating snow. Blowing snow could significantly reduce visibility. * ADDITIONAL DETAILS...The strongest winds are forecast this evening east of the Stillwater River Valley. |
| Alert: | High Wind Watch |
| Area(s): | Eastern Toole and Liberty; Hill County; Northern Blaine County; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-04-22 @ 12:23 am -> 2026-04-23 @ 7:00 pm |
| Onset: | 2026-04-23 @ 1:00 am -> 2026-04-22 @ 3:30 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:23 am |
| Headline: | High Wind Watch issued April 21 at 11:23PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Northwesterly winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...Eastern Toole and Liberty Counties, Hill County, Northern Blaine County, Western and Central Chouteau County, Bears Paw Mountains and Southern Blaine, and Fergus County below 4500ft. * WHEN...From late Wednesday night through Thursday afternoon. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. |
| Alert: | High Wind Warning |
| Area(s): | Madison River Valley |
| Effective: | 2026-04-22 @ 12:23 am -> 2026-04-22 @ 7:00 pm |
| Onset: | 2026-04-22 @ 4:00 am -> 2026-04-22 @ 3:30 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-04-22 @ 12:23 am |
| Headline: | High Wind Warning issued April 21 at 11:23PM MDT until April 22 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Southerly winds 30 to 45 mph with gusts up to 60 mph expected. * WHERE...Madison River Valley. * WHEN...From 3 AM to 6 PM MDT Wednesday. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. |
| Alert: | Red Flag Warning |
| Area(s): | Dawson/McCone/Prairie/Richland/Wibaux Counties |
| Effective: | 2026-04-21 @ 10:49 pm -> 2026-04-22 @ 10:00 pm |
| Onset: | 2026-04-22 @ 10:00 am -> 2026-04-22 @ 3:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 10:49 pm |
| Headline: | Red Flag Warning issued April 21 at 9:49PM MDT until April 22 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from 9 AM to 9 PM MDT Wednesday. The Fire Weather Watch is no longer in effect. * 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: | Red Flag Warning |
| 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 @ 10:49 pm -> 2026-04-22 @ 10:00 pm |
| Onset: | 2026-04-22 @ 10:00 am -> 2026-04-22 @ 3:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-04-21 @ 10:49 pm |
| Headline: | Red Flag Warning issued April 21 at 9:49PM MDT until April 22 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from 9 AM to 9 PM MDT Wednesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zones 120, 134, 135, 136, and 137. * WIND...Southwest then west at 20 to 30 mph. * HUMIDITY...As low as 20 percent near the Canadian border to as low as 10 percent south of Highway 2. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| 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): | 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: | 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. |