Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Sioux Ranger District Custer National Forest |
| Effective: | 2026-08-03 @ 3:44 am -> 2026-08-03 @ 10:00 pm |
| Onset: | 2026-08-03 @ 4:00 am -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-03 @ 3:44 am |
| Headline: | Red Flag Warning issued August 3 at 2:44AM MDT until August 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 until 9 PM MDT this evening. * IMPACTS: Low humidities and strong gusty winds will create erratic fire behavior. * AFFECTED AREA: In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Fallon. * WIND: North 15 to 30 mph with gusts up to 40 mph. * HUMIDITY: As low as 20 percent. * TEMPERATURES: Lower 80s. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-08-02 @ 10:42 pm -> 2026-08-03 @ 3:00 pm |
| Onset: | 2026-08-03 @ 1:00 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-02 @ 10:42 pm |
| Headline: | Lake Wind Advisory issued August 2 at 9:42PM MDT until August 3 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Northwest winds 15 to 25 mph with gusts up to 35 mph expected. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, McCone, and Petroleum Counties. * WHEN...From noon to 9 PM MDT Monday. * IMPACTS...Strong lake winds could produce rough waves which can overturn or swamp small craft. |
| Alert: | Air Quality Alert |
| Area(s): | Chouteau, MT; Flathead, MT; Glacier, MT; Hill, MT; Lake, MT; Liberty, MT; Lincoln, MT; Pondera, MT; Sanders, MT; Teton, MT; Toole, MT |
| Effective: | 2026-08-02 @ 10:12 am -> 2026-08-03 @ 10:00 am |
| Onset: | 2026-08-02 @ 10:12 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Great Falls MT on 2026-08-02 @ 10:13 am |
| Headline: | Air Quality Alert issued August 2 at 9:12AM MDT by NWS Great Falls MT |
| Description: |
AQAMT The Montana Department of Environmental Quality has issued an air quality alert for Chouteau, Flathead, Glacier, Hill, Lake, Liberty, Lincoln, Pondera, Sanders, Teton, Toole counties in effect until 9AM on 08/03/2026 An Air Quality Alert means that particulates have been trending upwards and that an exceedance of the 24 hour National Ambient Air Quality Standard (NAAQS) has occurred or may occur in the near future. Elevated particulate levels from wildfire smoke As of 7AM on 08/02/2026, particulate levels in Libby are Unhealthy for Sensitive Groups. As of 7AM on 08/02/2026, particulate levels in Billings, Butte, Cut Bank, Dillon, Frenchtown, Great Falls, Hamilton, Havre, Helena, Lewistown, Malta, Missoula and Sleeping Giant are Moderate. When air quality is Unhealthy for Sensitive Groups... State and local health officials recommend that people with respiratory or heart disease, the elderly and children should limit prolonged exertion. When air quality is Moderate... State and local health officials recommend that unusually sensitive people should consider reducing prolonged or heavy exertion. For more information visit the Montana Department of Environmental Quality at http://todaysair.mtdeq.us |
| Alert: | Air Quality Alert |
| Area(s): | Beaverhead, MT; Blaine, MT; Broadwater, MT; Cascade, MT; Deer Lodge, MT; Fergus, MT; Granite, MT; Jefferson, MT; Judith Basin, MT; Lewis and Clark, MT; Meagher, MT; Mineral, MT; Missoula, MT; Petroleum, MT; Phillips, MT; Powell, MT; Ravalli, MT; Silver Bow, MT |
| Effective: | 2026-08-02 @ 10:12 am -> 2026-08-03 @ 10:00 am |
| Onset: | 2026-08-02 @ 10:12 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Great Falls MT on 2026-08-02 @ 10:13 am |
| Headline: | Air Quality Alert issued August 2 at 9:12AM MDT by NWS Great Falls MT |
| Description: |
AQAMT The Air Quality Alert for Beaverhead, Blaine, Broadwater, Cascade, Deer Lodge, Fergus, Granite, Jefferson, Judith Basin, Lewis and Clark, Meagher, Mineral, Missoula, Petroleum, Phillips, Powell, Ravalli and Silver Bow Counties has been cancelled. For more information visit the Montana Department of Environmental Quality at www.todaysair.mt.gov |