⚠️ Severe Thunderstorm Warning – Dickinson, IA; Osceola, IA; Nobles, MN – Tuesday, August 18, 2026

Severe Thunderstorm Warning issued August 18 at 7:07PM CDT until August 18 at 7:45PM CDT by NWS Sioux Falls SD

Details

SVRFSD

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for…
Osceola County in northwestern Iowa…
Southwestern Dickinson County in northwestern Iowa…
South central Nobles County in southwestern Minnesota…

* Until 745 PM CDT.

* At 705 PM CDT, a severe thunderstorm was located near Sibley,
moving southeast at 35 mph.

HAZARD…Ping pong ball size hail and 60 mph wind gusts.

SOURCE…Radar indicated.

IMPACT…People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near…
Bigelow through 715 PM CDT.
Ocheyedan and Harris around 720 PM CDT.

Other locations in the path of this severe thunderstorm include Lake
Park.

Instructions

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

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