Iowa, Nebraska, South Dakota Severe Thunderstorm Warning | Effective 05/18/2026 16:17

Headline: 
Severe Thunderstorm Warning issued May 18 at 6:17PM CDT until May 18 at 6:45PM CDT by NWS Sioux Falls SD
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 18, 2026 - 4:17pm
Expires: 
May 18, 2026 - 4:45pm
Description: 
At 616 PM CDT, a severe thunderstorm was located over Ponca, moving north at 55 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Trained weather spotters. At 610pm, trained weather spotters reported quarter size hail 3 miles southwest of Ponca, Nebraska! IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. This severe storm will be near... Elk Point and Ponca State Park around 620 PM CDT. Other locations in the path of this severe thunderstorm include Akron, Hawarden and Alcester.
Instruction: 
For your protection move to an interior room on the lowest floor of a building.
Area Description: 
Plymouth, IA; Sioux, IA; Dakota, NE; Dixon, NE; Union, SD
Forcast Office: 
NWS Sioux Falls SD