This is about the same as a category 1 hurricane (74 to 95 mph) and an EF0 to EF1 tornado (65 to 110 mph) over a large area. It raced north-northeastward at 50 to 70+ mph, and produced measured straight-line winds of between at 60 to over 100 mph. Seven tornadoes have been confirmed so far.Ī preliminary evaluation from the National Weather Service says a rare and particularly dangerous storm system known as a derecho moved through the Northern Plains– including eastern South Dakota and west central Minnesota– during the late afternoon and early evening last Thursday (May 12, 2022).ĭerechos feature unusually widespread wind damage, and the NWS says this was one of the most extreme examples on record. Serr explains how they determine what sites they need to see in person in order to evaluate them effectively. Serr says the NWS uses a combination of radar and on-site evaluation to determine the strength of a storm. Kelly Serr is the Warning Coordination Meteorologist for the National Weather Service Office in Aberdeen. Hear more about the May 12, 2022, derecho by listening to the DRG Media Group Beyond the Mic podcast titled “ Agriculture In-depth with National Weather Service Warning Coordination Meteorologist Kelly Serr.”Ī preliminary evaluation from the National Weather Service says a rare and particularly dangerous storm system moved through the Northern Plains during the late afternoon and early evening hours last Thursday (May 12, 2022). (News partner Watertown Radio contributed to this story.) Five miles north-northeast of Raymond (EF-0, 80 mph peak winds).Four miles north-northwest of Naples (EF-0, 80 mph peak winds).Three miles north of Garden City (EF-1, 97 mph peak winds). Three miles east-southeast of Estelline (EF-2, 120 mph peak winds).Four miles west-southwest of Thomas (EF-1, 95 mph peak winds).Seven miles south of Webster (EF-1, 100 mph peak winds).One mile east-southeast of Tunerville (EF-1, 100 mph peak winds).Four miles southwest of Norcross, Minnesota (EF-0, 80 mph peak winds).Five miles east of Dumont, Minnesota (EF-1, 100 mph peak winds).Six miles west-northwest of Rauville (EF-1, 110 mph peak winds).The city of Castlewood (EF-2, 120 mph peak winds).Other locations for confirmed tornadoes were in: The strongest of the 12 was an EF-2 tornado with peak winds estimated at 135 miles per hour that dropped down a mile south of Gary, where a farmhouse lost its roof, along with most of the exterior walls on the main floor of the home. The Aberdeen office of the National Weather Service has issued a final report on the severe storms that spawned tornadoes across northeastern South Dakota and west-central Minnesota last Thursday (May 12, 2022).Ī total of 12 tornadoes have been confirmed.
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