⚠️ Severe Thunderstorm Warning – Custer, SD; Fall River, SD; Pennington, SD; Weston, WY – Wednesday, August 12, 2026

Severe Thunderstorm Warning issued August 12 at 3:14PM MDT until August 12 at 4:00PM MDT by NWS Rapid City SD

Details

SVRUNR

The National Weather Service in Rapid City has issued a

* Severe Thunderstorm Warning for…
Western Custer County in southwestern South Dakota…
Northwestern Fall River County in southwestern South Dakota…
Southwestern Pennington County in west central South Dakota…
Southeastern Weston County in northeastern Wyoming…

* Until 400 PM MDT.

* At 314 PM MDT, a severe thunderstorm was located over Dewey, or 20
miles northwest of Edgemont, moving east at 30 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.

* Locations impacted include…
Hot Springs, Custer, Dewey, Pringle, Argyle, Jewel Cave National
Monument, Crazy Horse Memorial, Elk Mountain Lookout, Burdock,
Cottonwood Springs Dam, Stockade Lake, Sylvan Lake, Blue Bell,
Mount Coolidge, Black Elk Peak, Cold Brook Reservoir, western Wind
Cave National Park, Palmer Gulch Resort and western Custer State
Park.

Instructions

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.

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