Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Flathead/Mission Valleys |
| Effective: | 2026-09-11 @ 3:39 pm -> 2026-09-11 @ 4:15 pm |
| Onset: | 2026-09-11 @ 3:39 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-09-11 @ 3:39 pm |
| Headline: | Special Weather Statement issued September 11 at 2:39PM MDT by NWS Missoula MT |
| Description: |
At 239 PM MDT, Doppler radar was tracking a strong thunderstorm 9 miles west of Big Arm, or 16 miles northwest of Polson, moving east at 10 mph. HAZARD...Wind gusts up to 30 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Big Arm, Elmo, Proctor, Dayton and Niarada. |
| Alert: | High Wind Watch |
| Area(s): | Madison River Valley |
| Effective: | 2026-09-11 @ 12:36 pm -> 2026-09-12 @ 3:45 am |
| Onset: | 2026-09-13 @ 1:00 pm -> 2026-09-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-09-11 @ 12:36 pm |
| Headline: | High Wind Watch issued September 11 at 11:36AM MDT until September 13 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...Madison River Valley. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. |
| Alert: | Fire Weather Watch |
| Area(s): | Eastern Beaverhead National Forest |
| Effective: | 2026-09-11 @ 11:27 am -> 2026-09-12 @ 2:00 pm |
| Onset: | 2026-09-13 @ 1:00 pm -> 2026-09-13 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-09-11 @ 11:27 am |
| Headline: | Fire Weather Watch issued September 11 at 10:27AM MDT until September 13 at 8:00PM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST BEAVERHEAD... The National Weather Service in Missoula MT has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zone 111. * TIMING...From Sunday afternoon through Sunday evening. * WINDS...Southwest winds 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...Relative Humidity between 15 to 25 percent. * Strongest winds and lowest RH will be across the southern half of the zone. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
