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

Severe Thunderstorm Warning issued August 12 at 2:26PM MDT until August 12 at 3:15PM 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…
Southwestern Pennington County in west central South Dakota…
Southeastern Weston County in northeastern Wyoming…

* Until 315 PM MDT.

* At 226 PM MDT, a severe thunderstorm was located 9 miles south of
Newcastle, moving east at 40 mph.

HAZARD…Two inch 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…
Newcastle, Custer, Hill City, Pringle, Argyle, Jewel Cave National
Monument, Elk Mountain Lookout, Bear Mountain Lookout, Medicine
Mountain, Crazy Horse Memorial, Sylvan Lake, Black Elk Peak and
Palmer Gulch Resort.

Instructions

Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.

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