8/12/2025 1:14:00 PM until 8/13/2025 6:00:00 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.

The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon Wednesday to 8 PM MDT Thursday. * AFFECTED AREA: In Central WY Fire Zones...280...289...300. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. Conditions will improve overnight as winds decrease and humidities recover, however critical fire weather conditions will then return by around 1200 Thursday afternoon. * WIND: West 10 to 20 mph with gusts up to 30 mph on Wednesday afternoon, becoming light overnight, then west 10 to 15 with gusts to around 25 mph on Thursday. * THUNDERSTORMS: Increasing thunderstorm potential on Thursday afternoon across zones 279 and 289, with most likely chances between 1200 and 1800. * HUMIDITY: As low as 10 percent through 2000 Wednesday then recovering to around 35 to 45 percent overnight. Thursday, RH values around 12 to 15 percent in the afternoon and evening. * TEMPERATURES: Highs in the upper 80s. Lows in the mid 50s.