Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 97, NWS Aberdeen, SD

August 3, 1987Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 3, 1987, 12:32 AM CDT for Walworth County, South Dakota. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 3, 1987, 12:32 AM CDT (05:32 UTC)
Expired
Aug 3, 1987, 1:30 AM CDT
In force
58 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Walworth County, SD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Aug 3, 1:05 AM CDTThunderstorm Wind 52Walworth, SD

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 5.5 hours before the alert went out and 141 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 1987-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 1987-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
6 J/kg
Mixed-layer CIN
-456 J/kg
Mixed-layer LCL
3021 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 7:05 PM CDTSevere Thunderstorm WarningABRBrown, Marshall55 min
Aug 2, 7:24 PM CDTSevere Thunderstorm WarningABRRoberts36 min
Aug 2, 9:35 PM CDTSevere Thunderstorm WarningABRCampbell70 min
Aug 2, 11:00 PM CDTSevere Thunderstorm WarningABRCorson, Dewey60 min
Aug 2, 11:29 PM CDTSevere Thunderstorm WarningABRCampbell, Walworth61 min
Aug 3, 1:21 AM CDTSevere Thunderstorm WarningABREdmunds, Faulk69 min
Aug 3, 1:53 AM CDTSevere Thunderstorm WarningABRBrown67 min
Aug 3, 2:32 AM CDTSevere Thunderstorm WarningABRDay, Spink58 min
Aug 3, 2:32 AM CDTSevere Thunderstorm WarningABRMarshall58 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1987Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.