⚠️ Severe Thunderstorm Warning – Fall River, SD; Oglala Lakota, SD – Friday, August 21, 2026

Severe Thunderstorm Warning issued August 21 at 4:41PM MDT until August 21 at 5:15PM MDT by NWS Rapid City SD

Details

SVRUNR

The National Weather Service in Rapid City has issued a

* Severe Thunderstorm Warning for…
Southeastern Fall River County in southwestern South Dakota…
Southwestern Oglala Lakota County in southwestern South Dakota…

* Until 515 PM MDT.

* At 441 PM MDT, a severe thunderstorm was located over Slim Butte,
or 21 miles west of Pine Ridge, moving southeast at 30 mph.

HAZARD…Golf ball size hail and 70 mph wind gusts.

SOURCE…Automated observations.

IMPACT…People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.

* Locations impacted include…
Slim Butte and Slim Buttes Housing.

Instructions

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

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