Iowa, South Dakota Tornado Warning | Effective 05/17/2026 14:44

Headline: 
Tornado Warning issued May 17 at 4:44PM CDT until May 17 at 5:15PM CDT by NWS Sioux Falls SD
Event: 
Tornado Warning
Urgency: 
Immediate
Effective: 
May 17, 2026 - 2:44pm
Expires: 
May 17, 2026 - 3:15pm
Description: 
At 444 PM CDT, a severe thunderstorm capable of producing a tornado was located near Lake Alvin State Recreation Area, or near Sioux Falls, moving east at 35 mph. HAZARD...Tornado and quarter size hail. SOURCE...Radar indicated rotation. IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely. Locations impacted include... Sioux Falls, Larchwood, Valley Springs and Rowena.
Instruction: 
TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.
Area Description: 
Lyon, IA; Lincoln, SD; Minnehaha, SD
Forcast Office: 
NWS Sioux Falls SD