Alert archive / South Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 105, NWS Aberdeen, SD

June 21, 20074 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 21, 2007, 1:43 AM CDT for 4 counties in 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
Jun 21, 2007, 1:43 AM CDT (06:43 UTC)
Expired
Jun 21, 2007, 2:30 AM CDT
In force
47 min
Issued by
NWS Aberdeen, SD
Area
Counties, with a storm outline in the text

Counties Campbell County, SD, Edmunds County, SD, McPherson County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 96 km from the middle of the area, began a volume at 06:42 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, 6.7 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, Aberdeen, SD at 00:00Z on 2007-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 833 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 2007-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.19395878Sfc1 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
833 J/kg
Mixed-layer CIN
-248 J/kg
Mixed-layer LCL
1832 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

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 20, 8:08 PM CDT, 5 hours 35 minutes earlier.

Area forecast discussion, Jun 20, 8:08 PM CDT, 5 hours 35 minutes before
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Hazardous weather outlook, Jun 20, 5:18 AM CDT, 20 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
518 AM CDT WED JUN 20 2007

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-211030-
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-
518 AM CDT WED JUN 20 2007 /418 AM MDT WED JUN 20 2007/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND
NORTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE AREA THIS AFTERNOON
INTO TONIGHT. SOME OF THESE STORMS MAY BECOME SEVERE WITH LOCALLY
HEAVY RAINFALL...LARGE HAIL...AND DAMAGING WINDS. THERE IS ALSO
THE POTENTIAL FOR AN ISOLATED TORNADO WITH THUNDERSTORMS THAT
DEVELOP.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

CHANCES EXIST FOR MORE THUNDERSTORMS THURSDAY AND THURSDAY NIGHT.
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE AREA
AGAIN ON THURSDAY. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS
SUNDAY NIGHT AND MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND EVENING AFTER
3PM.

ECKSTEIN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 2:06 AM CDTSevere Thunderstorm WarningABRCampbell, Edmunds, McPherson, Walworth39 min
Jun 21, 2:44 AM CDTSevere Thunderstorm WarningABREdmunds, McPherson, Walworth46 min
Jun 21, 2:47 AM CDTSevere Thunderstorm WarningABRMcPherson43 min
Jun 21, 3:25 AM CDTSevere Thunderstorm WarningABRMcPherson38 min
Jun 21, 3:29 AM CDTSevere Thunderstorm WarningABREdmunds61 min
Jun 21, 3:52 AM CDTTornado WarningABREdmunds23 min
Jun 21, 4:22 AM CDTSevere Thunderstorm WarningABRCampbell, Edmunds, McPherson, Walworth53 min
Jun 21, 4:38 AM CDTSevere Thunderstorm WarningABRCorson67 min
Jun 21, 5:05 AM CDTSevere Thunderstorm WarningABRDewey, Potter, Walworth55 min
Jun 21, 5:45 AM CDTSevere Thunderstorm WarningABRCorson60 min
Jun 21, 5:52 AM CDTSevere Thunderstorm WarningABRPotter, Walworth38 min
Jun 21, 6:18 AM CDTTornado WarningABRDewey, Potter27 min
Jun 21, 6:35 AM CDTSevere Thunderstorm WarningABRDewey55 min
Jun 21, 6:43 AM CDTTornado WarningABRPotter32 min
Jun 21, 7:17 AM CDTSevere Thunderstorm WarningABRDewey, Potter58 min
Jun 21, 7:31 AM CDTSevere Thunderstorm WarningABRDewey, Potter, Sully59 min
Jun 21, 7:37 AM CDTTornado WarningABRSully23 min
Jun 21, 7:57 AM CDTFlash Flood WarningABRPotter, Sully3 hr
Jun 21, 8:27 AM CDTSevere Thunderstorm WarningABRHughes, Hyde, Stanley, Sully48 min
Jun 21, 8:59 AM CDTSevere Thunderstorm WarningABRBuffalo, Hand, Hyde46 min
Jun 21, 9:19 AM CDTTornado WarningABRBuffalo, Hand, Hyde26 min
Jun 21, 9:41 AM CDTTornado WarningABRBuffalo34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2007Every severe thunderstorm warning in 2007

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.