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

Severe Thunderstorm Warning issued June 17 at 6:08AM CDT until June 17 at 7:15AM CDT by NWS Des Moines IA

Details

SVRDMX

The National Weather Service in Des Moines has issued a

* Severe Thunderstorm Warning for…
Poweshiek County in central Iowa…
Southeastern Marshall County in central Iowa…
Northeastern Mahaska County in south central Iowa…
Northeastern Jasper County in central Iowa…

* Until 715 AM CDT.

* At 608 AM CDT, a severe thunderstorm was located near Laurel, or 11
miles northwest of Grinnell, moving southeast at 50 mph.

HAZARD…60 mph wind gusts and penny size hail.

SOURCE…Radar indicated.

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

* Locations impacted include…
Newton, Grinnell, Montezuma, Baxter, Rock Creek Lake, Kellogg,
Gilman, Lynnville, Malcom, Deep River, Laurel, Barnes City,
Haverhill, Oakland Acres, Searsboro, Ferguson, Guernsey, Grinnell
Regional Airport, and Rock Creek State Park.

This includes Interstate 80 between mile markers 170 and 198.

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.