Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 111, NWS Aberdeen, SD

August 5, 19874 counties in South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 5, 1987, 6:46 PM CDT for 4 counties in South Dakota. It was in force for 59 min. 2 reports 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 5, 1987, 6:46 PM CDT (23:46 UTC)
Expired
Aug 5, 1987, 7:45 PM CDT
In force
59 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Buffalo County, SD, Hughes County, SD, Hyde County, SD, Lyman 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 5, 7:15 PM CDTTornado F0Lyman, SD
Aug 5, 7:35 PM CDTTornado F0Lyman, 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 12:00Z, 11.8 hours before the alert went out and 123 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 1987-08-05Temperature 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 1987-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 168 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
1519 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
168 m²/s²
0-3 km storm-relative helicity
328 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.6

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, Aug 5, 6:25 PM CDT, 21 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
620 PM CDT WED AUG 5 1987

STORM DATA FOR WEDNESDAY AUG 5 1987

 TIME            COUNTY..LOCATION           CHARACTER OF STORM..DAMAGE
.......................................................................

 430 PM CDT     POTTER...GETTYSBURG.       MARBLE SIZE HAIL AND VERY
                                           HEAVY RAIN (SPOTTER)
 520 PM CDT     POTTER - WALWORTH          GOLFBALL SIZE HAIL (SPOTTER)
                COUNTY LINE 20N
                GETTYSBURG.
 535 PM CDT     EDMUNDS...BOWDLE 8E.       60 MPH WIND...MARBEL HAIL.
                                           (STATE POLICE)
 538 PM CDT     EDMUNDS...BOWDLE.          GOLFBALL HAIL. (STATE POLICE
 539 PM CDT     EDMUNDS...HOSMER.          GOLFBALL HAIL. (STATE POLICE
 540 PM CDT     WALWORTH...AKASKA.         MARBEL HAIL...HEAVY RAIN.
 555 PM CDT     EDMUNDS...HOSMER 10E.      MARBEL TO GOLFBALL HAIL WITH
         D                                  THE GROUND COVERED AND
                                           HEAVY RAIN. (SPOTTER)
 STUDNICKA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 4:28 PM CDTSevere Thunderstorm WarningABRSully62 min
Aug 5, 4:32 PM CDTSevere Thunderstorm WarningABRPotter58 min
Aug 5, 4:41 PM CDTTornado WarningABRSully34 min
Aug 5, 5:13 PM CDTSevere Thunderstorm WarningABRPotter, Walworth62 min
Aug 5, 5:29 PM CDTSevere Thunderstorm WarningABRHughes, Hyde, Stanley, Sully61 min
Aug 5, 5:29 PM CDTSevere Thunderstorm WarningABREdmunds61 min
Aug 5, 5:49 PM CDTSevere Thunderstorm WarningABRHand56 min
Aug 5, 6:13 PM CDTSevere Thunderstorm WarningABREdmunds, McPherson62 min
Aug 5, 6:16 PM CDTSevere Thunderstorm WarningABRFaulk59 min
Aug 5, 6:34 PM CDTSevere Thunderstorm WarningABRBrown56 min
Aug 5, 6:46 PM CDTSevere Thunderstorm WarningABRHand59 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.