Iowa Severe Thunderstorm Warning | Effective 04/17/2026 12:44

Headline: 
Severe Thunderstorm Warning issued April 17 at 2:44PM CDT until April 17 at 3:15PM CDT by NWS Des Moines IA
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
April 17, 2026 - 12:44pm
Expires: 
April 17, 2026 - 1:15pm
Description: 
SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Northwestern Poweshiek County in central Iowa... Southeastern Marshall County in central Iowa... Central Jasper County in central Iowa... * Until 315 PM CDT. * At 244 PM CDT, a severe thunderstorm was located near Lambs Grove, or 5 miles west of Newton, moving east at 50 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Public reported ping pong ball sized hail in Colfax. 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. * Locations impacted include... Newton, Grinnell, Colfax, Prairie City, Rock Creek Lake, Iowa Speedway, Kellogg, Gilman, Mingo, Lambs Grove, Oakland Acres, Grinnell Regional Airport, Prairie City Krohn Airport, Rock Creek State Park, and Newton Municipal Airport. This includes Interstate 80 between mile markers 154 and 184.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. A Tornado Watch remains in effect until 800 PM CDT for central Iowa.
Area Description: 
Jasper, IA; Marshall, IA; Poweshiek, IA
Forcast Office: 
NWS Des Moines IA