Alert archive / South Dakota / Tornado Warnings in 1987

Tornado Warning 22, NWS Aberdeen, SD

August 5, 1987Buffalo County, Lyman County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Aug 5, 1987, 7:09 PM CDT for Buffalo County, Lyman County, South Dakota. It was in force for 36 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, 7:09 PM CDT (00:09 UTC)
Expired: Aug 5, 1987, 7:45 PM CDT
In force: 36 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Buffalo 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

Time	Report	Where	Remark
Aug 5, 7:15 PM CDT	Tornado F0	Lyman, SD
Aug 5, 7:35 PM CDT	Tornado F0	Lyman, 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 00:00Z, 0.2 hours before the alert went out and 135 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1188 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1877 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHON 060009
TORHON
SDC017-085-060045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE HURON SD
709 PM CDT WED AUG 5 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

CENTRAL SOUTH DAKOTA...WESTERN BUFFALO AND NORTHEAST LYMAN

THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE LOWER BRULE AND
FORT THOMPSON.

AT 703 PM CDT  A TORNADO WAS REPORTED 3 MILES WEST OF RELIANCE OR
40 MILES SOUTHEAST OF PIERRE...MOVING EAST AT 25 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.

SPRINGER

What forecasters said that day

The local office's own words before this tornado 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, 44 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.

Issued	Product	Office	Counties	Lasted
Aug 5, 7:01 PM CDT	Severe Thunderstorm Warning	ABR	Brown	59 min
Aug 5, 7:32 PM CDT	Severe Thunderstorm Warning	ABR	Beadle	58 min
Aug 5, 7:53 PM CDT	Severe Thunderstorm Warning	ABR	Buffalo	67 min
Aug 5, 8:01 PM CDT	Severe Thunderstorm Warning	ABR	Jerauld, Sanborn	59 min
Aug 5, 8:17 PM CDT	Severe Thunderstorm Warning	ABR	Clark	58 min
Aug 5, 8:17 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	58 min

Nearby

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