Weather Alerts For Casper, WY

# HEADLINE -------------------- RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING # DETAILS -------------------- AFFECTED AREA: IN CENTRAL WY FIRE ZONES 280...283...289...300. In Southwest WY Fire Zone....279. COUNTIES AFFECTED: IN CENTRAL WY - Fremont...Natrona. In Southwest WY...Sweetwater. - IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. - WIND: West 20 to 30 mph with gusts up to 45 mph. - HUMIDITY: As low as 10 to 15 percent. ISSUED AT Monday, September 14, 2026 at 2:51 AM MDT ISSUED BY National Weather Service Riverton WY HEADER URGENT - FIRE WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- 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. # AREAS AFFECTED -------------------- Granite/Green/Ferris/Rattlesnake Mountains, Natrona County/Casper BLM, Casper Mountain, Sweetwater County/Rock Springs BLM/Flaming Gorge NRA, Upper Wind River Basin/Wind River Basin