Severe · Red Flag WarningActive alert

Red Flag Warning issued September 9 at 10:21AM MDT until September 10

Affecting Sioux Ranger District Custer National Forest

In effect until: Sep 10, 2026, 4:30 PM

Sioux Ranger District Custer National Forest

Likely impact; effects through 4:30 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 noon to 8 PM MDT Thursday.

* IMPACTS: Low humidities, unseasonably warm temperatures, and
strong 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 35 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™

Red Flag Warning issued September 9 at 10:21AM MDT until September 10

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