Alert archive / South Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 39, NWS Aberdeen, SD

July 9, 1987Hand County, Hyde County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 9, 1987, 6:55 PM CDT for Hand County, Hyde County, South Dakota. It was in force for 65 min. 1 report 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
Jul 9, 1987, 6:55 PM CDT (23:55 UTC)
Expired
Jul 9, 1987, 8:00 PM CDT
In force
65 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Hand County, SD, Hyde 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
Jul 9, 7:00 PM CDTHail 0.75Hyde, 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, 11.9 hours before the alert went out and 77 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

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

000 
TTAA00 KHON 092355
SVRHON
SDC069-059-100100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HURON SD
655 PM CDT THU JUL 9 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 800 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

CENTRAL SOUTH DAKOTA...NORTHERN HYDE AND NORTHWEST HAND

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE HIGHMORE...HOLABIRD
...POLO...REE HEIGHTS.

AT 545 PM CDT  RADAR INDICATED A SEVERE THUNDERSTORM 45 MILES NORTH
EAST OF MIERRE NEAR HOLABIRD MOVING EAST AT 30 MILES AN HOUR.

IF YOU ARE IN THE PATH OF THIS STORM..YOU SHOULD GET TO A REINFORCED
SHELTER. A SEVERE THUNDERSTORM PRODUCES ANY OR ALL OF THE FOLLOWING...
WIND GUSTS OF 60 MPH OR HIGHER...HAIL 3/4 INCH OR LARGER...DEADLY
LIGHTNING...AND HEAVY RAIN THAT CAN FLOOD LOW LYING AREAS RAPIDLY.

THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR
NO ADVANCE WARNING SO ABE ON THE LOOKOUT.

SPRINGER

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 9, 4:53 PM CDT, 2 hours 2 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
450 PM CDT THU JUL 9 1987

TIME:         EVENT AND AREA:
230 PM MDT    VERY HEAVY RAIN AND MARBLE SIZE HAIL AT GLEN CROSS
              IN DEWEY COUNTY.
430 PM CDT    FUNNEL CLOUD OVER MOBRIDGE SOUTH DAKOTA IN WALWORTH
              COUNTY AS REPORTED BY CIVIL DEFENSE.
415 PM CDT    GOLFBALL HAIL ALONG WITH 50 KNOT WIND AT THE WATER
              PLANT (WEATHER OBSERVER) AT MOBRIDGE.
435 PM CDT    TORNADO 5 MILES SOUTH OF MOBRIDGE REPORTED BY STATE
              POLICE.
 STUDNICKA
Local storm report, Jul 9, 6:05 PM CDT, 50 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
600 PM CDT THU JUL 9 1987

TIME:         EVENT AND PLACE:
515 PM CDT    16 MILES SOUTHWEST OF GETTYSBURY IN POTTER COUNTY.
              .98 INCH OF RAIN IN 20 MINUTES WITH PEA SIZE HAIL
              COVERING THE GROUND.
537 PM CDT    HOVEN S.D. IN POTTER COUNTY. VERY HEAVY RAIN.
540 PM CDT    16 MILES SOUTH OF LONG LAKE IN MCPHERSON COUNTY THE
              PUBLIC REPORTED A FUNNEL CLOUD TO THE ABERDEEN P.D.
 STUDNICKA

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, 4:33 PM CDTSevere Thunderstorm WarningABRPotter57 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

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.