Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Daniels, MT; Roosevelt, MT; Valley, MT |
| Effective: | 2026-09-02 @ 11:14 pm -> 2026-09-03 @ 12:15 am |
| Onset: | 2026-09-02 @ 11:14 pm -> 2026-09-03 @ 12:15 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Glasgow MT on 2026-09-02 @ 11:14 pm |
| Headline: | Severe Thunderstorm Warning issued September 2 at 10:14PM MDT until September 2 at 11:15PM MDT by NWS Glasgow MT |
| Description: |
SVRGGW The National Weather Service in Glasgow has issued a * Severe Thunderstorm Warning for... Western Daniels County in northeastern Montana... Northwestern Roosevelt County in northeastern Montana... Northeastern Valley County in northeastern Montana... * Until 1115 PM MDT. * At 1013 PM MDT, a severe thunderstorm was located 14 miles east of St. Marie, or 22 miles northeast of Glasgow, moving northeast at 25 mph. HAZARD...60 mph wind gusts and half dollar size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Richland, Lustre, Peerless, Four Buttes, West Fork, Volt, and Larslan. |
| Alert: | Red Flag Warning |
| Area(s): | Crow Indian Reservation/Big Horn Canyon Rec Area; Bighorn National Forest |
| Effective: | 2026-09-02 @ 1:10 pm -> 2026-09-03 @ 1:15 pm |
| Onset: | 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-09-02 @ 1:10 pm |
| Headline: | Red Flag Warning issued September 2 at 12:10PM MDT until September 3 at 9:00PM MDT by NWS Billings MT |
| Description: |
The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from noon to 9 PM MDT Thursday. * IMPACTS: Low humidities and strong gusty winds will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zone...284. In South Central MT Fire Zone...129. * COUNTIES AFFECTED: In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Yellowstone. * WIND: South 10 to 15 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. * ADDITIONAL DETAILS: The strongest winds, and area of greatest concern, in MTZ129 are forecast in the western portion of the zone. |
| Alert: | Red Flag Warning |
| 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: | 2026-09-02 @ 1:10 pm -> 2026-09-03 @ 1:15 pm |
| Onset: | 2026-09-03 @ 1:00 pm -> 2026-09-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-09-02 @ 1:10 pm |
| Headline: | Red Flag Warning issued September 2 at 12:10PM MDT until September 3 at 9:00PM MDT by NWS Billings MT |
| Description: |
The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from noon to 9 PM MDT Thursday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low humidities and strong gusty winds will 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 10 to 20 mph with gusts up to 40 mph. The strongest winds are forecast in the mountain foothills. * HUMIDITY: As low as 15 percent. * ADDITIONAL DETAILS: For MTZ123 and MTZ126, the worst conditions are expected 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. |