Iowa, Nebraska, South Dakota Severe Thunderstorm Warning | Effective 05/17/2026 17:40

Headline: 
Severe Thunderstorm Warning issued May 17 at 7:40PM CDT until May 17 at 8:30PM CDT by NWS Sioux Falls SD
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 17, 2026 - 5:40pm
Expires: 
May 17, 2026 - 6:30pm
Description: 
At 739 PM CDT, severe thunderstorms were located along a line extending from near Sioux City to 7 miles northeast of Salix to near Whiting, moving northeast at 60 mph. HAZARD...70 mph wind gusts and half dollar size hail. SOURCE...Mesonet. At 731 PM CDT, a personal weather station near Salix, IA reported a 69 mph wind gust. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. These severe storms will be near... Moville, Hinton, Lawton, and Hornick around 745 PM CDT. Kingsley, Merrill, Anthon, and Smithland around 750 PM CDT. Other locations in the path of these severe thunderstorms include Le Mars, Pierson, Remsen, Correctionville, Washta, Quimby, Cushing, Marcus, Cleghorn, Cherokee, Holstein and Aurelia.
Instruction: 
A Tornado Watch remains in effect until 1000 PM CDT for northwestern and west central Iowa...northeastern Nebraska...and southeastern South Dakota. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows.
Area Description: 
Cherokee, IA; Ida, IA; Plymouth, IA; Woodbury, IA; Dakota, NE; Union, SD
Forcast Office: 
NWS Sioux Falls SD