⚠️ Severe Thunderstorm Warning – Marshall, IA; Poweshiek, IA; Tama, IA – Wednesday, June 17, 2026

Severe Thunderstorm Warning issued June 17 at 5:49AM CDT until June 17 at 6:45AM CDT by NWS Des Moines IA

Details

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.

Instructions

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.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.