Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 104, NWS Aberdeen, SD

July 19, 2017Campbell County, Corson County, Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 19, 2017, 8:18 AM CDT for Campbell County, Corson County, Walworth County, South Dakota. It was in force for 57 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
Jul 19, 2017, 8:18 AM CDT (13:18 UTC)
Expired
Jul 19, 2017, 9:15 AM CDT
In force
57 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Campbell County, SD, Corson County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 129 km from the middle of the area, began a volume at 13:20 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 1.3 hours before the alert went out and 128 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 12:00Z on 2017-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 205 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 12:00Z on 2017-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 square meters per square second.1939587897Sfc1 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
205 J/kg
Mixed-layer CIN
-404 J/kg
Mixed-layer LCL
1357 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
323 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
Jul 19, 7:29 AM CDTSevere Thunderstorm WarningABRCampbell, Corson, Dewey, Walworth46 min
Jul 19, 8:56 AM CDTSevere Thunderstorm WarningABRCampbell, Corson, Edmunds, Walworth49 min
Jul 19, 9:17 AM CDTSevere Thunderstorm WarningABRDewey, Edmunds, Potter, Walworth43 min
Jul 19, 9:37 AM CDTSevere Thunderstorm WarningABREdmunds, Faulk, Walworth38 min
Jul 19, 9:46 AM CDTSevere Thunderstorm WarningABRFaulk, Hyde, Potter, Sully44 min
Jul 19, 10:09 AM CDTSevere Thunderstorm WarningABREdmunds, Faulk, Potter51 min
Jul 19, 10:24 AM CDTSevere Thunderstorm WarningABRFaulk, Hand, Hyde, Spink66 min
Jul 19, 10:45 AM CDTSpecial Weather StatementABRSpink45 min
Jul 19, 11:28 AM CDTSpecial Weather StatementABRClark, Day47 min
Jul 19, 12:13 PM CDTSpecial Weather StatementABRCodington, Day47 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2017Every severe thunderstorm warning in 2017

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.