⚠️ Severe Thunderstorm Warning – Plymouth, IA; Sioux, IA; Union, SD – Tuesday, June 30, 2026

Severe Thunderstorm Warning issued June 30 at 12:43AM CDT until June 30 at 1:15AM CDT by NWS Sioux Falls SD

Details

SVRFSD

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for…
Southwestern Sioux County in northwestern Iowa…
Northwestern Plymouth County in northwestern Iowa…
Northern Union County in southeastern South Dakota…

* Until 115 AM CDT.

* At 1243 AM CDT, a severe thunderstorm was located near Union Grove
State Park, or 11 miles east of Vermillion, moving northeast at 40
mph.

HAZARD…60 mph wind gusts and quarter size hail.

SOURCE…Radar indicated.

IMPACT…Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.

* This severe thunderstorm will be near…
Akron around 1250 AM CDT.
Hawarden around 1255 AM CDT.

Instructions

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

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