Alert archive / South Dakota / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 293, NWS Sioux Falls, SD

August 17, 2025Brule County, Charles Mix County, Gregory County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 17, 2025, 10:19 PM CDT for Brule County, Charles Mix County, Gregory County, South Dakota. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 17, 2025, 10:19 PM CDT (03:19 UTC)
Expired: Aug 17, 2025, 11:00 PM CDT
In force: 41 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Brule County, SD, Charles Mix County, SD, Gregory County, SD

The radar

The Sioux Falls radar (KFSD), 181 km from the middle of the area, began a volume at 03:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 6:13 PM CDT, 4 hours 6 minutes earlier.

Area forecast discussion, Aug 17, 6:13 PM CDT, 4 hours 6 minutes before

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Hazardous weather outlook, Aug 17, 5:14 PM CDT, 5 hours 5 minutes before

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In the hours before

Local storm report, Aug 17, 4:43 PM CDT, 5 hours 36 minutes before

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  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 11:37 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Davison	38 min
Aug 18, 12:11 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	49 min
Aug 18, 4:13 AM CDT	River Flood Warning	FSD	Brookings	11 days
Aug 18, 3:36 AM CDT	Flash Flood Warning	FSD	Lyon, Osceola, Sioux	2 hr
Aug 17, 7:09 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	51 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.