South Dakota Severe Severe Thunderstorm Warning | Effective 08/11/2026 22:22

Headline: 
Severe Thunderstorm Warning issued August 12 at 12:22AM CDT until August 12 at 1:15AM CDT by NWS Rapid City SD
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
August 11, 2026 - 10:22pm
Expires: 
August 11, 2026 - 11:15pm
Description: 
At 1222 AM CDT, severe thunderstorms were located along a line from over Carter to 5 miles northwest of Sicangu Village, or along a line from 20 miles west of Winner to 16 miles south of Mission, moving southeast at 40 mph. THESE ARE DESTRUCTIVE STORMS FOR OKREEK, WITTEN, WINNER, COLOME. HAZARD...100 mph wind gusts and quarter size hail. SOURCE...Automated observations. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Expect considerable damage to homes and businesses. Expect extensive tree damage and power outages. Locations impacted include... Winner, Mission, Rosebud, Saint Francis, Colome, Okreek, Wood, Carter, Millboro, Mosher, Keyapaha, Witten, Hidden Timber, Clearfield, Littleburg, Butte Creek, Antelope, Sicangu Village, Ideal South Housing and Lakeview.
Instruction: 
Seek shelter now inside an interior room on the lowest floor of a well-built structure. These storms have produced widespread destructive winds and are capable of producing large hail. This is a dangerous situation with winds expected to produce damage similar to a tornado. Move to an interior room on the lowest floor of a well-built structure. Mobile homes and high profile vehicles are at an enhanced risk for damage. This storm has a history of producing damaging winds.
Area Description: 
Mellette, SD; Todd, SD; Tripp, SD
Forcast Office: 
NWS Rapid City SD
Sender: 
w-nws.webmaster@noaa.gov