⚠️ Severe Thunderstorm Warning – Mellette, SD; Todd, SD; Tripp, SD – Wednesday, August 12, 2026

Severe Thunderstorm Warning issued August 12 at 12:17AM CDT until August 12 at 1:15AM CDT by NWS Rapid City SD

Details

SVRUNR

The National Weather Service in Rapid City has issued a

* Severe Thunderstorm Warning for…
Southeastern Mellette County in south central South Dakota…
Todd County in south central South Dakota…
Tripp County in south central South Dakota…

* Until 115 AM CDT.

* At 1217 AM CDT, severe thunderstorms were located along a line from
over Mosher to over Lakeview, or along a line from 21 miles
northeast of Mission to 15 miles south of Mission, moving southeast
at 40 mph.

THESE ARE DESTRUCTIVE STORMS FOR OKREEK, WITTEN, WINNER, COLOME.

HAZARD…90 mph wind gusts and quarter size hail.

SOURCE…Radar indicated.

IMPACT…You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes
will be heavily damaged or destroyed. Homes and businesses
will have substantial roof and window damage. Expect
extensive tree damage and power outages.

* Locations impacted include…
Winner, Mission, Rosebud, Saint Francis, Colome, Okreek, Wood,
Carter, Millboro, Mosher, Keyapaha, Witten, Hidden Timber,
Clearfield, Littleburg, Butte Creek, Antelope, Sicangu Village,
Ideal South Housing and Lakeview.

Instructions

Seek shelter now inside an interior room on the lowest floor of a
well-built structure. These storms are capable of producing
widespread destructive winds and large hail.

This is a dangerous situation with winds expected to produce damage
similar to a tornado. Move to an interior room on the lowest floor of
a well-built structure. Mobile homes and high profile vehicles are at
an enhanced risk for damage.

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