Red Flag Warning — Custer County; Sioux Ranger District Custer National Forest Severity: Severe. Certainty: Likely. * IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In Southeast MT Fire Zone...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Custer...Fallon. * COLD FRONT: A cold front will move through Thursday afternoon and evening shifting winds out of the northwest and increasing wind speeds. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: Up to 95 degrees.
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