Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 32, NWS Aberdeen, SD

July 9, 1987Potter County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 9, 1987, 4:33 PM CDT for Potter County, South Dakota. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1987, 4:33 PM CDT (21:33 UTC)
Expired
Jul 9, 1987, 5:30 PM CDT
In force
57 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.

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 9.6 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 12:00Z on 1987-07-09Temperature 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, Aberdeen, SD at 12:00Z on 1987-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
854 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
101 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 9, 2:12 PM CDTSevere Thunderstorm WarningABRCorson, Dewey63 min
Jul 9, 3:21 PM CDTSevere Thunderstorm WarningABRCorson, Dewey69 min
Jul 9, 4:01 PM CDTSevere Thunderstorm WarningABRCampbell, Walworth59 min
Jul 9, 4:30 PM CDTSevere Thunderstorm WarningABRStanley60 min
Jul 9, 4:59 PM CDTSevere Thunderstorm WarningABRHughes, Stanley61 min
Jul 9, 5:05 PM CDTSevere Thunderstorm WarningABRCampbell, Potter, Walworth55 min
Jul 9, 5:26 PM CDTSevere Thunderstorm WarningABRSully64 min
Jul 9, 5:52 PM CDTSevere Thunderstorm WarningABRMcPherson68 min
Jul 9, 6:05 PM CDTTornado WarningABRHyde, Sully40 min
Jul 9, 6:12 PM CDTSevere Thunderstorm WarningABREdmunds, Faulk, Walworth63 min
Jul 9, 6:36 PM CDTSevere Thunderstorm WarningABRLyman69 min
Jul 9, 6:55 PM CDTSevere Thunderstorm WarningABRHand, Hyde65 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; the sounding from the Mesonet's radiosonde archive.