Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties |
| Effective: | 2026-08-07 @ 1:40 pm -> 2026-08-08 @ 2:00 am |
| Onset: | 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-07 @ 1:40 pm |
| Headline: | Red Flag Warning issued August 7 at 12:40PM MDT until August 8 at 8:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from noon to 8 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * WIND...Northwest at 15 to 25 mph with gusts to 30 mph. * HUMIDITY...10-20%. * THUNDERSTORMS...None. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Dawson/McCone/Prairie/Richland/Wibaux Counties; The Little Rockies |
| Effective: | 2026-08-07 @ 1:40 pm -> 2026-08-08 @ 2:00 am |
| Onset: | 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 9:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-07 @ 1:40 pm |
| Headline: | Red Flag Warning issued August 7 at 12:40PM MDT until August 8 at 8:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from noon to 8 PM MDT Saturday. * AFFECTED AREA...Fire weather zones 122 and 135. * WIND...Northwest at 15 to 25 mph with gusts to 30 mph. * HUMIDITY...10-20%. * THUNDERSTORMS...NONE. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Lincoln Ranger District of the Helena National Forest; Central and Eastern Lewis and Clark National Forest Areas; Helena and Townsend Ranger Districts of the Helena National Forest |
| Effective: | 2026-08-07 @ 1:39 pm -> 2026-08-08 @ 4:45 am |
| Onset: | 2026-08-07 @ 1:39 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-07 @ 1:39 pm |
| Headline: | Red Flag Warning issued August 7 at 12:39PM MDT until August 8 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* AFFECTED AREA...Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...West 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Afternoon temperatures of 90 to 95 degrees. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended. |
| 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; Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM; Bighorn National Forest |
| Effective: | 2026-08-07 @ 1:13 pm -> 2026-08-08 @ 1:15 pm |
| Onset: | 2026-08-08 @ 12:00 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-07 @ 1:13 pm |
| Headline: | Red Flag Warning issued August 7 at 12:13PM MDT until August 8 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 11 AM to 9 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zones...123...124...125...126...127 128...129. In Southeast MT Fire Zones...130...131...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In Northwest SD...Harding. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. In Southwest MT...Gallatin. * WIND: Northwest 10 to 20 mph with gusts to 30 mph. * HUMIDITY: Minimums of 7 to 14 percent. * TEMPERATURES: Highs of 93 to 101 degrees. |
| Alert: | Air Quality Alert |
| Area(s): | Beaverhead, MT; Broadwater, MT; Deer Lodge, MT; Flathead, MT; Gallatin, MT; Granite, MT; Jefferson, MT; Lake, MT; Lewis and Clark, MT; Lincoln, MT; Madison, MT; Mineral, MT; Missoula, MT; Park, MT; Powell, MT; Ravalli, MT; Sanders, MT; Silver Bow, MT |
| Effective: | 2026-08-07 @ 9:30 am -> 2026-08-08 @ 10:00 am |
| Onset: | 2026-08-07 @ 9:30 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Great Falls MT on 2026-08-07 @ 9:31 am |
| Headline: | Air Quality Alert issued August 7 at 8:30AM MDT by NWS Great Falls MT |
| Description: |
AQAMT The Montana Department of Environmental Quality has issued an air quality alert for Beaverhead, Broadwater, Deer Lodge, Gallatin, Granite, Jefferson, Lake, Lincoln, Madison, Mineral, Park, Powell, Ravalli, Silver Bow, Flathead, Lewis and Clark, Mineral, Missoula, Powell, Sanders counties in effect until 9AM on 08/08/2026 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 08/07/2026, particulate levels in Columbia Falls, Dillon and Libby are Unhealthy. As of 7AM on 08/07/2026, particulate levels in Butte, Frenchtown, Hamilton, Helena, Missoula and Thompson Falls are Unhealthy for Sensitive Groups. As of 7AM on 08/07/2026, particulate levels in Billings, Great Falls and Sleeping Giant are Moderate. When air quality is Unhealthy... State and local health officials recommend that people with respiratory or heart disease, the elderly, and children should avoid prolonged exertion; everyone else should limit prolonged exertion. 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: | Red Flag Warning |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-08-06 @ 10:41 pm -> 2026-08-07 @ 6:45 am |
| Onset: | 2026-08-07 @ 1:00 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-06 @ 10:41 pm |
| Headline: | Red Flag Warning issued August 6 at 9:41PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST LOLO, BITTERROOT, DEERLODGE/WEST BEAVERHEAD, AND EAST BEAVERHEAD... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO AND FLATHEAD RESERVATION... ... The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from noon Friday to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From noon Friday to 9 PM MDT Saturday. * WINDS...West winds 5 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Eastern Lolo National Forest/Welcome Creek And Scapegoat Wildernesses; Bitterroot National Forest |
| Effective: | 2026-08-06 @ 10:41 pm -> 2026-08-07 @ 6:45 am |
| Onset: | 2026-08-07 @ 1:00 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-06 @ 10:41 pm |
| Headline: | Red Flag Warning issued August 6 at 9:41PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST LOLO, BITTERROOT, DEERLODGE/WEST BEAVERHEAD, AND EAST BEAVERHEAD... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO AND FLATHEAD RESERVATION... ... The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from noon Friday to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zones 108 and 109. * TIMING...From noon Friday to 9 PM MDT Saturday. * WINDS...West winds 10 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 15 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Western Lolo National Forest; Salish and Kootenai Indian Reservation |
| Effective: | 2026-08-06 @ 10:41 pm -> 2026-08-07 @ 6:45 am |
| Onset: | 2026-08-08 @ 1:00 pm -> 2026-08-08 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-06 @ 10:41 pm |
| Headline: | Red Flag Warning issued August 6 at 9:41PM MDT until August 8 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST LOLO, BITTERROOT, DEERLODGE/WEST BEAVERHEAD, AND EAST BEAVERHEAD... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SATURDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR WEST LOLO AND FLATHEAD RESERVATION... ... The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from noon to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zones 106 and 107. * TIMING...From noon to 9 PM MDT Saturday. * WINDS...West winds 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...Relative Humidity between 10 to 17 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |