Alert archive / South Dakota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 2, NWS Aberdeen, SD

April 22, 2026Edmunds County, Potter County, Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Apr 22, 2026, 8:58 PM CDT for Edmunds County, Potter County, Walworth County, South Dakota. It was in force for 47 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
Apr 22, 2026, 8:58 PM CDT (01:58 UTC)
Expired
Apr 22, 2026, 9:45 PM CDT
In force
47 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Damage threat
Considerable
Hail
0.75 in
Wind
70.0 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 01:59 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.0 hours before the alert went out and 114 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2026-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 259 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2026-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
259 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
3629 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 7:02 PM CDTSpecial Weather StatementABRStanley28 min
Apr 22, 7:49 PM CDTSpecial Weather StatementABRDewey, Jones, Stanley41 min
Apr 22, 8:27 PM CDTSpecial Weather StatementABRDewey, Jones, Stanley33 min
Apr 22, 8:42 PM CDTSevere Thunderstorm WarningABRJones, Stanley48 min
Apr 22, 8:57 PM CDTSpecial Weather StatementABRSully33 min
Apr 22, 9:22 PM CDTSevere Thunderstorm Warning Considerable damage threatABRCampbell, Edmunds, McPherson, Walworth53 min
Apr 22, 9:30 PM CDTSpecial Weather StatementABRCampbell, Hughes, Jones, Lyman, Potter, Sully and 1 more45 min
Apr 22, 10:09 PM CDTSpecial Weather StatementABRMcPherson51 min
Apr 22, 10:44 PM CDTSpecial Weather StatementABREdmunds31 min
Apr 22, 10:54 PM CDTSpecial Weather StatementABRSully51 min
Apr 22, 10:57 PM CDTSpecial Weather StatementABRMcPherson33 min
Apr 22, 11:28 PM CDTSpecial Weather StatementABRCampbell, Edmunds, McPherson47 min
Apr 22, 11:32 PM CDTSpecial Weather StatementABRDewey, Potter, Sully58 min
Apr 23, 1:00 AM CDTWind AdvisoryABRBrown, Buffalo, Campbell, Corson, Dewey, Edmunds and 12 more18 hr
Apr 23, 2:00 AM CDTRed Flag WarningABRClark, Codington, Day, Deuel, Grant, Hamlin and 2 more17 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.