Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 22, NWS Aberdeen, SD

July 6, 1987Edmunds County, Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 6, 1987, 7:46 PM CDT for Edmunds County, Walworth County, South Dakota. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1987, 7:46 PM CDT (00:46 UTC)
Expired
Jul 6, 1987, 8:45 PM CDT
In force
59 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Edmunds County, SD, Walworth 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 00:00Z, 0.8 hours before the alert went out and 112 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 1987-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2161 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 1987-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 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
2161 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
1688 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
213 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 6, 7:05 PM CDT, 41 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
705 PM CDT MON JUL 6 1987

TIME            EVENT AND LOCATION.
450 PM CDT      MARBLE SIZE HAIL WITH SOME TO ONE INCH AT GETTYSBURG
                IN POTTER COUNTY.
505 PM CDT      MARBLE SIZE HAIL AT SELBY IN WALWORTH COUNTY.
525 PM CDT      MARBLE SIZE HAIL AT TOLSTOY AND HOVEN IN POTTER
                COUNTY.
550 PM CDT      MARBLE SIZE HAIL AT EUREKA IN MCPHERSON COUNTY.
625 PM CDT      GOLFWBALL SIZE HAIL NEAR ONAKA IN FAULK COUNTY.
615 PM CDT      MARBLE SIZE HAIL AT SENECA IN FAULK COUNTY.
 STUDNICKA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 7:09 PM CDTTornado WarningABRBuffalo36 min
Jul 6, 7:22 PM CDTSevere Thunderstorm WarningABRJerauld68 min
Jul 6, 7:28 PM CDTSevere Thunderstorm WarningABRLyman62 min
Jul 6, 7:49 PM CDTSevere Thunderstorm WarningABRBuffalo56 min
Jul 6, 8:06 PM CDTSevere Thunderstorm WarningABRHand, Hyde64 min
Jul 6, 8:31 PM CDTSevere Thunderstorm WarningABRJerauld59 min
Jul 6, 9:52 PM CDTSevere Thunderstorm WarningABRMiner68 min
Jul 6, 10:54 PM CDTSevere Thunderstorm WarningABRDeuel, Hamlin66 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.