⚠️ Severe Thunderstorm Warning – Custer, SD; Pennington, SD – Tuesday, August 11, 2026

Severe Thunderstorm Warning issued August 11 at 5:06PM MDT until August 11 at 6:00PM MDT by NWS Rapid City SD

Details

SVRUNR

The National Weather Service in Rapid City has issued a

* Severe Thunderstorm Warning for…
Northwestern Custer County in southwestern South Dakota…
West Central Pennington County in west central South Dakota…

* Until 600 PM MDT.

* At 506 PM MDT, a severe thunderstorm was located near Deerfield, or
18 miles northwest of Hill City, moving southeast at 20 mph.

HAZARD…Ping pong ball size hail.

SOURCE…Radar indicated.

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

* Locations impacted include…
Deerfield, Flag Mountain, Deerfield Reservoir, Bear Mountain
Lookout, Medicine Mountain and Redbank Spring Campground.

Instructions

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

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