Iowa, Minnesota Severe Thunderstorm Warning | Effective 05/17/2026 16:22

Headline: 
Severe Thunderstorm Warning issued May 17 at 6:22PM CDT until May 17 at 6:45PM CDT by NWS Sioux Falls SD
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 17, 2026 - 4:22pm
Expires: 
May 17, 2026 - 4:45pm
Description: 
At 622 PM CDT, severe thunderstorms were located along a line extending from 7 miles south of Fulda to near Worthington to near Ashton, moving east at 35 mph. HAZARD...70 mph wind gusts and ping pong ball size hail. SOURCE...Public. At 554 PM CDT, golf ball sized hail was reported in Lismore, MN. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. These severe storms will be near... Worthington, Sibley, Ocheyedan, Brewster, and Round Lake around 625 PM CDT.
Instruction: 
A Tornado Watch remains in effect until 1000 PM CDT for northwestern Iowa...and southwestern Minnesota. 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.
Area Description: 
Lyon, IA; Osceola, IA; Murray, MN; Nobles, MN
Forcast Office: 
NWS Sioux Falls SD