Iowa Severe Severe Thunderstorm Warning | Effective 06/17/2026 03:49

Headline: 
Severe Thunderstorm Warning issued June 17 at 5:49AM CDT until June 17 at 6:45AM CDT by NWS Des Moines IA
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
June 17, 2026 - 3:49am
Expires: 
June 17, 2026 - 4:45am
Description: 
SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Northeastern Poweshiek County in central Iowa... Northeastern Marshall County in central Iowa... Southern Tama County in central Iowa... * Until 645 AM CDT. * At 548 AM CDT, a severe thunderstorm was located over Green Mountain, or near Marshalltown, moving southeast at 45 mph. THIS IS A DESTRUCTIVE STORM with 90 plus mph winds!. HAZARD...90 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be heavily damaged or destroyed. Homes and businesses will have substantial roof and window damage. Expect extensive tree damage and power outages. * Locations impacted include... Marshalltown, Toledo, Tama, Brooklyn, Meskwaki Casino, Le Grand, Victor, Garwin, Holiday Lake, Chelsea, Montour, Elberon, Ferguson, Green Mountain, Hartwick, Guernsey, Vining, Toledo Municipal Airport, Union Grove State Park, and Otter Creek Lake and Park. This includes Interstate 80 between mile markers 198 and 204.
Instruction: 
This is an EXTREMELY DANGEROUS SITUATION with tornado like wind speeds expected. Mobile homes and high profile vehicles are especially susceptible to winds of this magnitude and may be overturned. For your protection move to an interior room on the lowest floor of a building. This storm has the potential to cause serious injury and significant property damage.
Area Description: 
Marshall, IA; Poweshiek, IA; Tama, IA
Forcast Office: 
NWS Des Moines IA