BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 656 PM CDT Thu Aug 20 2026 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Southwestern Minnehaha County in southeastern South Dakota... Northwestern Lincoln County in southeastern South Dakota... Southeastern McCook County in southeastern South Dakota... Northeastern Turner County in southeastern South Dakota... * Until 745 PM CDT. * At 656 PM CDT, a severe thunderstorm was located near Monroe, or near Lake Vermillion State Recreation Area, moving east at 35 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. * This severe thunderstorm will be near... Parker around 700 PM CDT. Chancellor around 705 PM CDT. Sioux Falls, Tea, and Lennox around 710 PM CDT. Other locations in the path of this severe thunderstorm include Harrisburg and Worthing. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sioux Falls. && LAT...LON 4347 9727 4362 9717 4357 9706 4350 9691 4350 9664 4324 9680 TIME...MOT...LOC 2356Z 291DEG 30KT 4351 9712 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.50 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH
