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Severe · Red Flag WarningActive alert

Red Flag Warning issued September 10 at 5:05AM MDT until September 10

Affecting Sioux Ranger District Custer National Forest

In effect until: Sep 11, 2026, 2:00 AM

Sioux Ranger District Custer National Forest

Likely impact; effects through 2:00 AM.

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)
* IMPACTS: Low humidities, unseasonably 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: West 10 to 20 mph with gusts up to 30 mph.

* HUMIDITY: As low as 12 percent.

* TEMPERATURES: Up to 90.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™