⚠️ Severe Thunderstorm Warning – Lyon, IA; O’Brien, IA; Osceola, IA; Sioux, IA; Nobles, MN; Rock, MN; Lincoln, SD; Minnehaha, SD – Wednesday, July 1, 2026

Severe Thunderstorm Warning issued July 1 at 3:06AM CDT until July 1 at 3:45AM CDT by NWS Sioux Falls SD

Details

SVRFSD

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for…
Lyon County in northwestern Iowa…
Western Osceola County in northwestern Iowa…
Sioux County in northwestern Iowa…
Northwestern O’Brien County in northwestern Iowa…
Rock County in southwestern Minnesota…
Southwestern Nobles County in southwestern Minnesota…
Eastern Minnehaha County in southeastern South Dakota…
Lincoln County in southeastern South Dakota…

* Until 345 AM CDT.

* At 305 AM CDT, severe thunderstorms were located along a line
extending from near Harrisburg to near Larchwood to Matlock, moving
north at 40 mph.

HAZARD…60 mph wind gusts.

SOURCE…Radar indicated. A secondary line of thunderstorms is
also producing 60 mph wind gusts.

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

* Severe thunderstorms will be near…
Sioux Falls, Rock Rapids, Brandon, Harrisburg, George, Valley
Springs, Hills, Beaver Creek, Lake Alvin State Recreation Area,
and Rowena around 310 AM CDT.
Ellsworth, Little Rock, and Corson around 315 AM CDT.
Luverne around 320 AM CDT.
Garretson, Blue Mounds State Park, Palisades State Park, and
Renner around 325 AM CDT.

Other locations in the path of these severe thunderstorms include
Adrian, Hardwick, Sherman and Rushmore.

Instructions

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Sioux Falls.

Torrential rainfall is occurring with these storms, 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.