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Damaging Winds in the Region – May 17th, 2026
Multiple rounds of severe storms impacted the region on Sunday May 17th, 2026. Initially a few severe thunderstorms developed in south central South Dakota Sunday afternoon. This activity merged into a line of storms, producing hail up to golf ball size, up to 80 mph wind gusts, and a few brief tornadoes, tracking northeast from Burke and Wagner, SD to Sioux Falls to Worthington, MN.
Farther south, another line of severe storms tracked northeast through northeast Nebraska and northwest Iowa Sunday evening. This round of storms produced several brief tornadoes and damaging wind gusts of 60 to 80 mph with a few gusts approaching 90 mph across a swath from near Sioux City and Salix, Iowa to Kingsley, Cherokee, and Milford, IA. Flash flooding from multiple rounds of rain brought water over roads in Le Mars, IA as well. Local graduation ceremonies and celebrations were disrupted due to the coverage and timing of the storms.
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More Siouxland tornadoes confirmed from Sunday’s storms
SIOUX CITY (KTIV) – The National Weather Service has released more information about Sunday’s tornadoes and we’re now aware of 16 tornadoes that touched down in Siouxland.
There were two tornadoes in the Sioux City area. One south of Sergeant Bluff with unknown intensity, and one south of Whispering Creek rated an EF-0 (winds between 65 & 85 mph).
There were several tornadoes rated as EF-1 (winds between 86 & 110 mph). The EF-1 tornado locations were Winnebago, Plover, Mallard, and Rockwell City.
The EF-0 tornadoes were Emmetsburg, Graettinger, and south of Whispering Creek as mentioned above.
There were many other damage reports documented from Sunday’s storms and those were caused by straight line winds from 60 to 80 mph with a few gusts to around 90 mph according to the National Weather Service.
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