Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Lower Clark Fork Region; Missoula/Bitterroot Valleys |
| Effective: | 2026-09-01 @ 8:05 pm -> 2026-09-01 @ 8:30 pm |
| Onset: | 2026-09-01 @ 8:05 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-09-01 @ 8:05 pm |
| Headline: | Special Weather Statement issued September 1 at 7:05PM MDT by NWS Missoula MT |
| Description: |
At 705 PM MDT, Doppler radar was tracking a decaying thunderstorm 8 miles northwest of Lolo, or 11 miles west of Missoula, moving north at 15 mph. HAZARD...Wind gusts 30 to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Missoula, Alberton, Frenchtown, Wye, Huson and Ninemile. |
| Alert: | High Wind Warning |
| Area(s): | Madison River Valley |
| Effective: | 2026-09-01 @ 1:15 pm -> 2026-09-02 @ 4:15 am |
| Onset: | 2026-09-02 @ 1:00 pm -> 2026-09-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-09-01 @ 1:15 pm |
| Headline: | High Wind Warning issued September 1 at 12:15PM MDT until September 2 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the High Wind Warning on Wednesday, southwest winds 35 to 45 mph with gusts up to 60 mph expected. For the High Wind Watch on Thursday, south winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Madison River Valley. * WHEN...For the High Wind Warning, from noon to 9 PM MDT Wednesday. For the High Wind Watch, from Wednesday evening through Thursday evening. * IMPACTS...Damaging winds may cause damage to trees and power lines. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Wind speeds will decrease to between 20 to 30 mph from the late evening hours on Wednesday through the mid-morning hours on Thursday before increasing once again. |
| Alert: | High Wind Watch |
| Area(s): | Madison River Valley |
| Effective: | 2026-09-01 @ 1:15 pm -> 2026-09-02 @ 4:15 am |
| Onset: | 2026-09-02 @ 10:00 pm -> 2026-09-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-09-01 @ 1:15 pm |
| Headline: | High Wind Watch issued September 1 at 12:15PM MDT until September 3 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the High Wind Warning on Wednesday, southwest winds 35 to 45 mph with gusts up to 60 mph expected. For the High Wind Watch on Thursday, south winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Madison River Valley. * WHEN...For the High Wind Warning, from noon to 9 PM MDT Wednesday. For the High Wind Watch, from Wednesday evening through Thursday evening. * IMPACTS...Damaging winds may cause damage to trees and power lines. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...Wind speeds will decrease to between 20 to 30 mph from the late evening hours on Wednesday through the mid-morning hours on Thursday before increasing once again. |
| Alert: | Fire Weather Watch |
| Area(s): | Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County |
| Effective: | 2026-09-01 @ 12:54 pm -> 2026-09-02 @ 1:00 pm |
| Onset: | 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-09-01 @ 12:54 pm |
| Headline: | Fire Weather Watch issued September 1 at 11:54AM MDT until September 3 at 8:00PM MDT by NWS Billings MT |
| Description: |
The National Weather Service in Billings has issued a Fire Weather Watch...which is in effect from Thursday afternoon through Thursday evening. * IMPACTS: Low humidities, high temperatures in the 80s, and strong gusty winds may create erratic fire behavior. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...126...127 128. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Carbon...Park...Stillwater...Sweet Grass Yellowstone. In Southwest MT...Gallatin. * WIND: Southwest 15 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 14 percent. * ADDITIONAL DETAILS: For MT123 and MT126, the worst conditions are expecetd across the lower elevations. |
| Alert: | Red Flag Warning |
| Area(s): | Eastern Beaverhead National Forest |
| Effective: | 2026-09-01 @ 11:22 am -> 2026-09-03 @ 9:00 pm |
| Onset: | 2026-09-02 @ 1:00 pm -> 2026-09-03 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-09-01 @ 11:22 am |
| Headline: | Red Flag Warning issued September 1 at 10:22AM MDT until September 3 at 8:00PM MDT by NWS Missoula MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM NOON WEDNESDAY TO 8 PM MDT THURSDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST BEAVERHEAD... .Strong southwest winds will develop Wednesday as a cold front tracks eastward and stalls along the Continental Divide. Winds will peak each afternoon and early evening. Winds will remain elevated Wednesday night, especially across midslopes and ridgetops, with poor humidity recoveries. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from noon Wednesday to 8 PM MDT Thursday. * AFFECTED AREA...Fire Weather Zone 111. * TIMING...From noon Wednesday to 8 PM MDT Thursday. * WINDS...Southwest winds 30 to 40 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Relative Humidity between 20 to 30 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |