Alert archive / South Dakota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 121, NWS Aberdeen, SD

August 6, 2019Dewey County, Potter County, Sully County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 6, 2019, 4:56 PM MDT for Dewey County, Potter County, Sully County, South Dakota. It was in force for 64 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 6, 2019, 4:56 PM MDT (22:56 UTC)
Expired
Aug 6, 2019, 6:00 PM MDT
In force
64 min
Issued by
NWS Aberdeen, SD
Area
Storm-based polygon
Hail
1.5 in
Wind
70.0 mph

Counties Dewey County, SD, Potter County, SD, Sully County, SD

The radar

The Aberdeen radar (KABR), 159 km from the middle of the area, began a volume at 22:57 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
Aug 6, 1:53 PM MDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.9 hours before the alert went out and 201 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 2019-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2019-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1937 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
168 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
Aug 6, 2:47 PM MDTSevere Thunderstorm WarningABRCorson58 min
Aug 6, 3:01 PM MDTSpecial Weather StatementABRCorson59 min
Aug 6, 3:23 PM MDTSevere Thunderstorm WarningABRCorson, Dewey67 min
Aug 6, 3:35 PM MDTSevere Thunderstorm WarningABRCorson40 min
Aug 6, 3:48 PM MDTSpecial Weather StatementABRCampbell57 min
Aug 6, 4:10 PM MDTSevere Thunderstorm WarningABRCorson, Dewey65 min
Aug 6, 4:24 PM MDTSevere Thunderstorm WarningABRCorson, Dewey, Walworth51 min
Aug 6, 5:01 PM MDTSevere Thunderstorm WarningABRCampbell59 min
Aug 6, 5:20 PM MDTSpecial Weather StatementABRCampbell25 min
Aug 6, 5:46 PM MDTSpecial Weather StatementABRCampbell29 min
Aug 6, 5:51 PM MDTSevere Thunderstorm WarningABRHughes, Hyde, Sully54 min
Aug 6, 5:52 PM MDTSevere Thunderstorm WarningABRCampbell, Edmunds, McPherson, Walworth14 min
Aug 6, 5:58 PM MDTSevere Thunderstorm WarningABRCampbell, Walworth47 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2019Every severe thunderstorm warning in 2019

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.