⚠️ Severe Thunderstorm Warning – Jasper, IA; Marshall, IA; Poweshiek, IA; Story, IA; Tama, IA – Thursday, August 13, 2026

Severe Thunderstorm Warning issued August 13 at 7:11AM CDT until August 13 at 8:00AM CDT by NWS Des Moines IA

Details

SVRDMX

The National Weather Service in Des Moines has issued a

* Severe Thunderstorm Warning for…
Western Poweshiek County in central Iowa…
Southeastern Story County in central Iowa…
Marshall County in central Iowa…
Southwestern Tama County in central Iowa…
Jasper County in central Iowa…

* Until 800 AM CDT.

* At 711 AM CDT, severe thunderstorms were located along a line
extending from Colo to Baxter to near Runnells, moving east at 40
mph.

HAZARD…60 mph wind gusts.

SOURCE…Radar indicated.

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

* Locations impacted include…
Marshalltown, Newton, Grinnell, Tama, Colfax, Monroe, Prairie City,
State Center, Baxter, Iowa Speedway, Meskwaki Casino, Rock Creek
Lake, Le Grand, Colo, Melbourne, Sully, Kellogg, Gilman, Lynnville,
and Rhodes.

This includes Interstate 80 between mile markers 153 and 190.

Instructions

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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.