Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Dawson/McCone/Prairie/Richland/Wibaux Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties |
| Effective: | 2026-08-02 @ 8:24 pm -> 2026-08-02 @ 10:00 pm |
| Onset: | 2026-08-02 @ 8:24 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-02 @ 8:24 pm |
| Headline: | Red Flag Warning issued August 2 at 7:24PM MDT until August 2 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
...CRITICAL FIRE WEATHER CONCERNS THIS WEEKEND... * WIND...West to northwest winds with speeds at 15 to 25 mph withgusts to 35 mph. * HUMIDITY...minimum relative humidity as low as 8%. * DRY LIGHTNING... Thunderstorms with very little rain are possible * IMPACTS...Any fires that develop will likely spread rapidly. 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; Sheridan County/Casper BLM; Bighorn National Forest |
| Effective: | 2026-08-02 @ 3:59 pm -> 2026-08-03 @ 4:00 am |
| Onset: | 2026-08-02 @ 3:59 pm -> 2026-08-03 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-02 @ 3:59 pm |
| Headline: | Red Flag Warning issued August 2 at 2:59PM MDT until August 3 at 3:00AM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front 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. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Custer...Powder River...Rosebud...Treasure. In Southwest MT...Gallatin. * WIND: North to east 10 to 15 mph with gusts to 25 mph over the plains and southwest 10 to 20 mph with gusts to 35 mph over the mountains this afternoon, becoming north 15 to 20 mph with gusts up to 30 mph across the area this evening into tonight, with locally stronger gusts near the mountains. * HUMIDITY: As low as 10 to 20 percent. * TEMPERATURES: 80 to 95 degrees. * COLD FRONT: A cold front will move through the area this evening into tonight shifting winds out of the north. |
| Alert: | Red Flag Warning |
| Area(s): | Sioux Ranger District Custer National Forest |
| Effective: | 2026-08-02 @ 3:59 pm -> 2026-08-03 @ 4:00 pm |
| Onset: | 2026-08-02 @ 3:59 pm -> 2026-08-03 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-02 @ 3:59 pm |
| Headline: | Red Flag Warning issued August 2 at 2:59PM MDT until August 3 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, warm temperatures, and 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 10 to 15 mph with gusts up to 25 mph this afternoon into tonight, becoming 15 to 30 mph with gusts up to 40 mph on Monday. * HUMIDITY: As low as 10 percent today and 18 percent Monday. * TEMPERATURES: Up to 98 degrees today and 85 degrees Monday. * COLD FRONT: A cold front will move through the area tonight. A secondary cold front arrives Monday, increasing wind speeds out of the north. |
| Alert: | Red Flag Warning |
| Area(s): | Eastern Glacier/Toole/Central/Eastern Pondera/Liberty; Hill and Blaine Counties; Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front; Chouteau and Fergus Counties; 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: | 2026-08-02 @ 12:58 pm -> 2026-08-03 @ 4:00 am |
| Onset: | 2026-08-02 @ 12:58 pm -> 2026-08-03 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-02 @ 12:58 pm |
| Headline: | Red Flag Warning issued August 2 at 11:58AM MDT until August 3 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties, 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...Northwest 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. * TEMPERATURES...Up to 90. * COLD FRONT...A cold front will arrive Sunday evening and shift the winds from westerly to more northerly. * 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: | 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 |
| Alert: | Fire Weather Watch |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 2:26 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Past |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Description: |
The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Alert: | Red Flag Warning |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 10:15 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From 2 PM Saturday to 9 PM MDT Sunday. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 20 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |