Montana, Wyoming Red Flag Warning | Effective 04/22/2026 00:27

Headline: 
Red Flag Warning issued April 22 at 1:27AM MDT until April 22 at 8:00PM MDT by NWS Riverton WY
Event: 
Red Flag Warning
Urgency: 
Expected
Effective: 
April 22, 2026 - 12:27am
Expires: 
April 22, 2026 - 5:00pm
Description: 
The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from 9 AM this morning to 8 PM MDT this evening. the Fire Weather Watch is no longer in effect. * AFFECTED AREA: In Central WY Fire Zones...280...283...285...289...300. In North Central WY Fire Zones...275...276...281...282...287. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. In Southwest WY...Sweetwater. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * WIND: Southwest 25 to 40 mph with gusts up to 55 mph. * HUMIDITY: As low as 10 to 13 percent. * ADDITIONAL DETAILS: Occasional gusts of or around 60 mph are possible.
Instruction: 
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.
Area Description: 
North Bighorn Basin/Worland BLM; Cody Foothills; Natrona County/Casper BLM; Johnson County/Casper BLM; South Bighorn Basin/Worland BLM; Upper Wind River Basin/Wind River Basin; South Bighorn Mountains; Owl Creek Mountains; Granite/Green/Ferris/Rattlesnake Mountains; Casper Mountain
Forcast Office: 
NWS Riverton WY