Iowa Severe Thunderstorm Warning | Effective 05/18/2026 18:08

Headline: 
Severe Thunderstorm Warning issued May 18 at 8:08PM CDT until May 18 at 9:00PM CDT by NWS Des Moines IA
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 18, 2026 - 6:08pm
Expires: 
May 18, 2026 - 7:00pm
Description: 
SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Northeastern Polk County in central Iowa... Southeastern Story County in central Iowa... Marshall County in central Iowa... Northwestern Jasper County in central Iowa... * Until 900 PM CDT. * At 808 PM CDT, a severe thunderstorm was located over Valeria, or 10 miles northeast of Altoona, moving northeast at 45 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Marshalltown, State Center, Baxter, Maxwell, Melbourne, Gilman, Albion, Collins, Rhodes, Mingo, Laurel, Haverhill, and Ferguson. This includes Interstate 80 between mile markers 157 and 159.
Instruction: 
For your protection move to an interior room on the lowest floor of a building. A Tornado Watch remains in effect until 1000 PM CDT for central Iowa.
Area Description: 
Jasper, IA; Marshall, IA; Polk, IA; Story, IA
Forcast Office: 
NWS Des Moines IA
Sender: 
w-nws.webmaster@noaa.gov