Alert archive / South Dakota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 241, NWS Aberdeen, SD

August 29, 2026Edmunds County, Potter County, Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 29, 2026, 6:30 PM CDT for Edmunds County, Potter County, Walworth County, South Dakota. It was in force for 60 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 29, 2026, 6:30 PM CDT (23:30 UTC)
Expired
Aug 29, 2026, 7:30 PM CDT
In force
60 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Edmunds County, SD, Potter County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 105 km from the middle of the area, began a volume at 23:29 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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 2:27 PM CDT, 4 hours 3 minutes earlier.

Area forecast discussion, Aug 29, 2:27 PM CDT, 4 hours 3 minutes before
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Hazardous weather outlook, Aug 29, 3:15 AM CDT, 15 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Aberdeen SD
315 AM CDT Sat Aug 29 2026

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-301200-
Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-Roberts-
Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant-
Hamlin-Deuel-Stanley-Sully-Hughes-Hyde-Hand-Jones-Lyman-Buffalo-
315 AM CDT Sat Aug 29 2026 /215 AM MDT Sat Aug 29 2026/

This Hazardous Weather Outlook is for west central Minnesota,
central South Dakota, north central South Dakota and northeast
South Dakota.

.DAY ONE...Today and tonight.

A Marginal Risk for severe weather, a level 1 of 5 threat, is in
place for storms late this afternoon and into the overnight hours.
The best chance for showers and thunderstorms (30-60% chance) is over
north central South Dakota. The main severe threats will be hail of
one inch in diameter and wind gusts to 60 miles per hour. Heavy
rainfall is also possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

On Sunday, another Marginal Risk is in place for the entire area
during the late afternoon through overnight hours, with the best
chances for showers and thunderstorms (30-60% chance) over northern
South Dakota. The main severe threats will once again be hail of one
inch in diameter and wind gusts to 60 miles per hour.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

SRF

In the hours before

Local storm report, Aug 29, 3:57 PM CDT, 2 hours 33 minutes before
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Local storm report, Aug 29, 5:55 PM CDT, 35 minutes before
Preliminary Local Storm Report
National Weather Service Aberdeen SD
555 PM CDT Sat Aug 29 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 PM     Hail             9 SW Bowdle             45.37N 99.80W
08/29/2026  E1.50 Inch       Walworth           SD   Public

            Hail was a varity of sized, from pea all the
            way up to ping pong ball sized.

&&

NV

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 10:44 PM CDTSpecial Weather StatementABRHand31 min
Aug 28, 10:52 PM CDTSevere Thunderstorm WarningABRHand, Spink53 min
Aug 28, 11:35 PM CDTSevere Thunderstorm WarningABRSpink40 min
Aug 28, 11:56 PM CDTSpecial Weather StatementABRSpink34 min
Aug 29, 12:13 AM CDTSevere Thunderstorm WarningABRClark, Spink47 min
Aug 29, 1:50 AM CDTSpecial Weather StatementABRClark25 min
Aug 29, 2:12 AM CDTSpecial Weather StatementABRHamlin33 min
Aug 29, 5:24 PM CDTSevere Thunderstorm WarningABREdmunds, Potter, Walworth53 min
Aug 29, 6:27 PM CDTAreal Flood WarningABREdmunds, Walworth3 hr
Aug 29, 6:54 PM CDTSevere Thunderstorm Warning Considerable damage threatABRDewey49 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2026Every severe thunderstorm warning in 2026

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.