Wyoming Severe Severe Thunderstorm Warning | Effective 06/20/2026 14:09

Headline: 
Severe Thunderstorm Warning issued June 20 at 3:09PM MDT until June 20 at 3:30PM MDT by NWS Cheyenne WY
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
June 20, 2026 - 2:09pm
Expires: 
June 20, 2026 - 2:30pm
Description: 
At 309 PM MDT, severe thunderstorms were located along a line extending from near Prior Flat Campground to 16 miles southeast of Dome Rock to 7 miles southeast of Seminoe State Park, moving east at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Hanna, Medicine Bow, Elk Mountain, Seminoe Campground, Miracle Mile, Fort Steele Historic Site, Shirley Basin, Seminoe Dam, Prior Flat Campground, Kortes Dam, Dome Rock, and Seminoe State Park. This includes Interstate 80 in Wyoming between mile markers 223 and 262.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. Wind damage with these storms will occur before any rain or lightning. Do not wait for the sound of thunder before taking cover. SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from windows.
Area Description: 
Carbon, WY
Forcast Office: 
NWS Cheyenne WY