NWS Billings MTFW.W 0011September 3, 2026
Red Flag Warning: Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest, Custer County, Sioux Ranger District Custer National Forest and 1 more, MT and SD
The National Weather Service office in Billings issued a red flag warning for Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest, Custer County, Sioux Ranger District Custer National Forest and 1 more in Montana, South Dakota, Wyoming, which was in force until 9:00 p.m. local time on September 4. It was the 11th red flag warning the NWS office in Billings issued in 2026. Montana had 9 red flag warnings in September 2026, against 9 in an average September of 2008-2025 (Montana's red flag warnings by year).
ExpiredWarning
In force for 12 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Billings MT
- Area
- Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest, Custer County, Sioux Ranger District Custer National Forest and 1 more
- State
- Montana
- Level
- Warning
- Issued
- 2:19 p.m. MDT, September 3, 2026
- In force from
- 9:00 a.m. MDT, September 4, 2026
- Expires
- 9:00 p.m. MDT, September 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KBYZ FW.W 0011
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from 9 AM to 9 PM MDT Friday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low humidities, unseasonably warm temperatures, and strong gusty winds will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zone...274. In Southeast MT Fire Zones...131...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. * WIND: South 10 to 20 mph with gusts 25 to 35 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: in the 90s.
What the agency told people to do
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.