Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 79, NWS Aberdeen, SD

July 22, 1987Potter County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 22, 1987, 10:15 PM CDT for Potter County, South Dakota. It was in force for 60 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
Jul 22, 1987, 10:15 PM CDT (03:15 UTC)
Expired
Jul 22, 1987, 11:15 PM CDT
In force
60 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Potter 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
Jul 22, 10:25 PM CDTHail 0.75Potter, 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

Rapid City, SD (KRAP), launched 00:00Z, 3.3 hours before the alert went out and 257 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, Rapid City, SD at 00:00Z on 1987-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 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, Rapid City, SD at 00:00Z on 1987-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
41 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
3733 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
134 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
Jul 22, 8:34 PM CDTSevere Thunderstorm WarningABRDewey56 min
Jul 22, 9:25 PM CDTSevere Thunderstorm WarningABRDewey65 min
Jul 22, 9:44 PM CDTSevere Thunderstorm WarningABRCorson61 min
Jul 22, 9:48 PM CDTSevere Thunderstorm WarningABRCampbell, Walworth57 min
Jul 22, 10:35 PM CDTSevere Thunderstorm WarningABRCampbell, Walworth55 min
Jul 22, 11:00 PM CDTSevere Thunderstorm WarningABRDewey60 min
Jul 22, 11:19 PM CDTSevere Thunderstorm WarningABREdmunds, McPherson56 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.