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Severe · Red Flag WarningActive alert

Red Flag Warning issued September 3 at 2:19PM MDT until September 4

Affecting Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM

In effect until: Sep 4, 2026, 8:30 PM

Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM

Likely impact; effects through 8:30 PM.

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.

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Read the original bulletin (official text)
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Fire Weather Watch is no longer in effect.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.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™