Severe Thunderstorm Warning — Mellette County, South Dakota

⛈️ Active: Severe Thunderstorm Warning

Severe Thunderstorm Warning issued August 11 at 10:59PM MDT until August 11 at 11:30PM MDT by NWS Rapid City SD

At 1159 PM CDT, severe thunderstorms were located along a line from 7 miles north of Wood to over He Dog, or along a line from 16 miles east of White River to 19 miles west of Mission, moving southeast at 40 mph. THESE ARE DESTRUCTIVE STORMS FOR WOOD, MOSHER. 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... Mission, White River, Rosebud, Saint Francis, Parmelee, Okreek, Wood, Mosher, Upper Cut Meat, Horse Creek, Antelope, Butte Creek, Swift Bear, Ring Thunder, Soldier Creek, Fairgrounds Housing, Two Strike, Grass Mountain, He Dog and Haystack Butte.

Effective August 12, 2026 at 12:59 AM ET · Expires August 12, 2026 at 1:30 AM ET

📋 Official NWS Guidance

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.