Severe Thunderstorm Warning for South Central South Dakota
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NWS Sioux Falls issued a Severe Thunderstorm Warning for northwestern Charles Mix, northwestern Gregory, and southwestern Brule counties until 3:15 AM CDT.
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- Record type
- Severe Thunderstorm Warning
- Affected area
- South Central South Dakota
- Issued
- August 18, 2026
- Issuing authority
- NWS Sioux Falls SD
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
A Severe Thunderstorm Warning was issued by the National Weather Service in Sioux Falls SD. The alert is effective from August 18, 2026 at 2:24 AM CDT until August 18, 2026 at 3:15 AM CDT.
Affected Areas
The warning covers northwestern Charles Mix County, northwestern Gregory County, and southwestern Brule County in south central South Dakota. The storm will be near Lake Francis Case around 2:30 AM CDT.
What You Should Do
Move to an interior room on the lowest floor of a building. To report severe weather, contact your nearest law enforcement agency.
Expected Conditions
At 2:24 AM CDT, a severe thunderstorm was located 7 miles southwest of Dude Ranch or 9 miles southwest of Oacoma, moving southeast at 45 mph. Hazards include quarter size hail and wind gusts up to 50 mph. Damage to vehicles is expected.
Timeline
The warning is in effect until 3:15 AM CDT on August 18, 2026.
Original source: NOAA Official Notice ↗
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