⚠️ Severe Thunderstorm Warning – Boone, IA; Jasper, IA; Marshall, IA; Polk, IA; Story, IA – Wednesday, June 17, 2026

Severe Thunderstorm Warning issued June 17 at 5:34AM CDT until June 17 at 6:15AM CDT by NWS Des Moines IA

Details

SVRDMX

The National Weather Service in Des Moines has issued a

* Severe Thunderstorm Warning for…
Polk County in central Iowa…
Southern Story County in central Iowa…
Southwestern Marshall County in central Iowa…
Northwestern Jasper County in central Iowa…
Southeastern Boone County in central Iowa…

* Until 615 AM CDT.

* At 533 AM CDT, a severe thunderstorm was located over Nevada,
moving southeast at 40 mph.

HAZARD…60 mph wind gusts and nickel size hail.

SOURCE…Radar indicated.

IMPACT…Expect damage to roofs, siding, and trees.

* Locations impacted include…
Des Moines, Ames, Ankeny, Johnston, Newton, Altoona, Pleasant Hill,
Nevada, Carlisle, Bondurant, Polk City, Huxley, Saylorville,
Madrid, Mitchellville, Colfax, Prairie City, Slater, Baxter, and
Adventureland Amusement Park.

This includes the following highways…
Interstate 35 between mile markers 87 and 112.
Interstate 80 between mile markers 132 and 168.
Interstate 235 between mile markers 7 and 14.

Instructions

For your protection move to an interior room on the lowest floor of a
building.

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