de: 01/08/2026, 13:09
a: 02/08/2026, 00:00

* WHAT...Dangerously hot conditions with high temperatures of 98 to 108. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...Until midnight MDT tonight. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures in the 60s and 70s tonight followed by high temperatures in the 90s Sunday may cause lingering heat stress, especially for those without relief from the heat. Much cooler temperatures arrive by Monday.

de: 01/08/2026, 13:28
a: 02/08/2026, 07:00

The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 1 PM to 9 PM MDT Sunday. the Fire Weather Watch is no longer in effect. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...283...285. In North Central WY Fire Zones...275...276...282. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. * WIND: West 10 to 20 mph with gusts to 30 mph. * HUMIDITY: 5 to 10 percent. * TEMPERATURES: Highs in the upper 90s to low 100s.

de: 01/08/2026, 14:44
a: 02/08/2026, 14:45

* IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...126...127 128. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Carbon...Park...Stillwater...Sweet Grass Yellowstone. In Southwest MT...Gallatin. * WIND: Southwest 10 to 20 mph with gusts up to 35 mph today, becoming northwest 10 to 15 with gusts to 25 mph along and behind a cold front tonight into Sunday morning. Winds become east over the plains and southwest over the mountains Sunday afternoon. * HUMIDITY: As low as 5 percent today and 10 percent Sunday. * TEMPERATURES: Up to 105 degrees today and 100 degrees Sunday. * COLD FRONT: A cold front moves through tonight shifting winds from the southwest to the northwest.

de: 02/08/2026, 00:00
a: 02/08/2026, 14:45

* IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zone...129. In Southeast MT Fire Zones...130...131...132. * COUNTIES AFFECTED: In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Yellowstone. In Southeast MT...Custer...Powder River...Rosebud...Treasure. * COLD FRONT: A cold front moves through tonight into early Sunday morning shifting winds to the northwest and increasing wind speeds. * WIND: South 10 to 20 mph ahead of the front becoming northwest 10 to 20 mph with gusts up to 35 mph along and behind the front. Winds become northeast to east Sunday afternoon. * HUMIDITY: 20 to 35 percent Sunday morning becoming as low as 10 percent Sunday afternoon. * TEMPERATURES: Up to 100 degrees.