Severe Thunderstorm Warning

Locations Affected

De Smet, SD ∙ Lake Whitewood, SD ∙ Lake Madison, SD ∙ Carthage, SD ∙ Unityville, SD ∙ Montrose, SD ∙ Brant Lake, SD ∙ Spencer, SD ∙ Oldham, SD ∙ Sinai, SD

Full Alert Message

Severe Weather Statement National Weather Service Sioux Falls SD 350 AM CDT Sat Aug 16 2025 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM CDT FOR KINGSBURY...WESTERN MOODY...NORTHEASTERN SANBORN...LAKE... SOUTHEASTERN BEADLE...NORTHWESTERN MINNEHAHA...MINER...NORTHERN MCCOOK...NORTHEASTERN HANSON AND WESTERN BROOKINGS COUNTIES... At 349 AM CDT, severe thunderstorms were located along a line extending from near Lake Thompson State Recreation Area to near Lake Herman State Park to near Montrose, moving east at 60 mph. HAZARD...70 mph wind gusts and penny size hail. SOURCE...Radar indicated. At 3:34 AM CDT, a 58 mph wind gust was reported in Howard. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Madison, Lake Herman State Park, Arlington, Montrose, Ramona, Hetland, Nunda, Colton, Wentworth, Sinai, Chester, Colman and Lyons. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4453 9706 4410 9681 4369 9683 4360 9782 4395 9781 4430 9802 TIME...MOT...LOC 0849Z 259DEG 51KT 4430 9739 4404 9723 4371 9725 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...70 MPH

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