Alert archive / South Dakota / Tornado Warnings in 1987

Tornado Warning 3, NWS Aberdeen, SD

July 6, 1987Hand County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 6, 1987, 6:18 PM CDT for Hand County, South Dakota. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1987, 6:18 PM CDT (23:18 UTC)
Expired
Jul 6, 1987, 6:45 PM CDT
In force
27 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Hand 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, 11.3 hours before the alert went out and 62 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 1987-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 190 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 1987-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 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
190 J/kg
Mixed-layer CIN
-276 J/kg
Mixed-layer LCL
1517 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KHON 062318 RRA
TORHON
SDC059-062345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE HURON SD
618 PM CDT MON JUL 6 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

CENTRAL SOUTH DAKOTA...SOUTHERN HAND

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE AMES COLONY
AND DANFORTH

AT 610 PM CDT  RADAR INDICATED A POSSIBLE TORNADO IN EXTREME
SOUTHWESTERN HAND COUNTY...ABOUT 50 MILES WEST SOUTHWEST OF HURON.

 NUMEROUS REPORTS OF FUNNEL CLOUDS HAVE ALSO BEEN RECEIVED.
MOVEMENT WAS EAST AT 15 MILES AN HOUR.

IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT
SHELTER IF AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE
LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR
A REINFORCED BUILDING.

KRAUSE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:53 PM CDTSevere Thunderstorm WarningABRHughes, Hyde67 min
Jul 6, 5:22 PM CDTSevere Thunderstorm WarningABRHughes, Hyde68 min
Jul 6, 5:26 PM CDTSevere Thunderstorm WarningABRCampbell, Walworth64 min
Jul 6, 5:26 PM CDTSevere Thunderstorm WarningABRPotter64 min
Jul 6, 5:45 PM CDTSevere Thunderstorm WarningABREdmunds, Faulk60 min
Jul 6, 5:45 PM CDTSevere Thunderstorm WarningABRMcPherson60 min
Jul 6, 5:47 PM CDTSevere Thunderstorm WarningABRHand, Hyde58 min
Jul 6, 5:54 PM CDTSevere Thunderstorm WarningABRBuffalo66 min
Jul 6, 6:25 PM CDTTornado WarningABRBuffalo35 min
Jul 6, 6:30 PM CDTTornado WarningABRFaulk30 min
Jul 6, 6:35 PM CDTTornado WarningABRLyman25 min
Jul 6, 6:40 PM CDTTornado WarningABRHughes, Hyde10 min
Jul 6, 6:45 PM CDTSevere Thunderstorm WarningABREdmunds, McPherson60 min

Nearby

Tornado Warnings in South Dakota, 1987Every tornado warning in 1987Tornadoes 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.