Iowa Severe Severe Thunderstorm Warning | Effective 07/20/2026 13:23

Headline: 
Severe Thunderstorm Warning issued July 20 at 3:23PM CDT until July 20 at 4:30PM CDT by NWS Des Moines IA
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
July 20, 2026 - 1:23pm
Expires: 
July 20, 2026 - 2:30pm
Description: 
SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Northern Hardin County in central Iowa... Wright County in north central Iowa... Franklin County in north central Iowa... Southeastern Hancock County in north central Iowa... Northwestern Grundy County in central Iowa... Southern Butler County in north central Iowa... Eastern Hamilton County in central Iowa... Southwestern Cerro Gordo County in north central Iowa... * Until 430 PM CDT. * At 322 PM CDT, a severe thunderstorm was located near Meservey, or 15 miles northwest of Hampton, moving southeast at 60 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. * Locations impacted include... Webster City, Iowa Falls, Hampton, Clarion, Belmond, Parkersburg, Ackley, Jewell Junction, Sheffield, Aplington, Elm Lake, Big Wall Lake, Alden, Kanawha, Dumont, Radcliffe, Dows, Ellsworth, New Hartford, and Latimer. This includes Interstate 35 between mile markers 131 and 187.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. Large hail, damaging wind, and continuous cloud to ground lightning are occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. A Tornado Watch remains in effect until 1000 PM CDT for central, north central and northeastern Iowa.
Area Description: 
Butler, IA; Cerro Gordo, IA; Franklin, IA; Grundy, IA; Hamilton, IA; Hancock, IA; Hardin, IA; Wright, IA
Forcast Office: 
NWS Des Moines IA