Alert archive / South Dakota / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 80, NWS Aberdeen, SD

June 27, 2026Corson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 27, 2026, 9:11 PM MDT for Corson County, South Dakota. It was in force for 23 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
Jun 27, 2026, 9:11 PM MDT (03:11 UTC)
Expired
Jun 27, 2026, 9:34 PM MDT
In force
23 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Corson County, SD

The radar

The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 03:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 27, 3:05 PM MDTTornado WatchSPC11 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.2 hours before the alert went out and 124 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, Bismarck Municip, ND at 00:00Z on 2026-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1476 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, Bismarck Municip, ND at 00:00Z on 2026-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 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
1476 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.9

Open this sounding in Storm Lab

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 Jun 27, 7:16 PM MDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jun 27, 7:16 PM MDT, 1 hour 55 minutes before
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Hazardous weather outlook, Jun 27, 6:53 PM MDT, 2 hours 18 minutes before
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In the hours before

Special weather statement, Jun 27, 8:26 PM MDT, 45 minutes before
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Special weather statement, Jun 27, 8:55 PM MDT, 16 minutes before
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<body>
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Special weather statement, Jun 27, 9:00 PM MDT, 11 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 7:48 PM MDTSevere Thunderstorm WarningABRDewey, Stanley42 min
Jun 27, 8:04 PM MDTSevere Thunderstorm WarningABRJones56 min
Jun 27, 8:26 PM MDTSpecial Weather StatementABRStanley34 min
Jun 27, 8:55 PM MDTSpecial Weather StatementABRDewey, Sully35 min
Jun 27, 9:00 PM MDTSpecial Weather StatementABRHughes45 min
Jun 27, 9:14 PM MDTSpecial Weather StatementABRJones31 min
Jun 27, 9:30 PM MDTSpecial Weather StatementABRHughes, Potter, Walworth45 min
Jun 27, 10:08 PM MDTAreal Flood WarningABRHughes, Stanley107 min
Jun 27, 10:19 PM MDTSpecial Weather StatementABREdmunds, Faulk, McPherson41 min
Jun 27, 10:29 PM MDTSpecial Weather StatementABRHand, Hyde46 min
Jun 27, 10:42 PM MDTSevere Thunderstorm WarningABREdmunds, McPherson48 min
Jun 27, 11:09 PM MDTSevere Thunderstorm WarningABRBrown, Edmunds, Faulk, Hand, Spink36 min
Jun 27, 11:23 PM MDTSpecial Weather StatementABRBrown52 min
Jun 27, 11:34 PM MDTSevere Thunderstorm WarningABRBrown, Edmunds41 min
Jun 27, 11:45 PM MDTSevere Thunderstorm WarningABRBrown, Clark, Day, Spink45 min
Jun 28, 12:16 AM MDTSpecial Weather StatementABRMarshall29 min
Jun 28, 12:25 AM MDTSpecial Weather StatementABRClark, Day50 min
Jun 28, 10:40 AM MDTHeat AdvisoryABRCodington, Deuel, Grant, Hamlin, Roberts32 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.