Red Flag Warning: Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM

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Red Flag Warning — Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sioux Ranger District Custer National Forest; Sheridan County/Casper BLM Severity: Severe. Certainty: Likely. * IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zone...274. In South Central MT Fire Zone...129. In Southeast MT Fire Zones...130...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...Carbon...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. * WIND: South 10 to 20 mph with gusts up to 35 mph. * HUMIDITY: Minimums of 5 to 10 percent. Humidity will be slow to recover overnight. * TEMPERATURES: 90 to 100 degrees, falling into the upper 60s to 70s overnight. Some locations may remain in the 80s overnight. * COLD FRONT: Arrives over south central Montana this evening, bringing a shift to breezy northwest winds. The front will reach far southeast Montana early Monday morning. Before the frontal passage, a southeasterly low level jet will produce gusty ridgetop winds (up to 40 mph) and a slow humidity recovery over southeast Montana tonight.