Alert archive / South Dakota / Tornado Warnings in 1989

Tornado Warning 4, NWS Aberdeen, SD

July 10, 1989Beadle County, Clark County, Kingsbury County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 10, 1989, 7:55 PM CDT for Beadle County, Clark County, Kingsbury County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1989, 7:55 PM CDT (00:55 UTC)
Expired
Jul 10, 1989, 8:30 PM CDT
In force
35 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Beadle County, SD, Clark County, SD, Kingsbury 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, 0.9 hours before the alert went out and 60 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 1989-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2059 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 1989-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
2059 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1780 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.3
Supercell composite
8.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHON 110055
TORHON
SDC005-025-077-110130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE HURON SD
755 PM CDT MON JUL 10 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF SOUTH DAKOTA
      NORTHEAST BEADLE...SOUTHWEST CLARK...NORTHWEST KINGSBURY

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE BANCROFT SOUTH
DAKOTA.

AT 750 PM CDT  RADAR INDICATED A POSSIBLE TORNADO 8 MILES NORTHEAST
OF HURON SOUTH DAKOTA MOVING NORTHEAST AT 25 MILES AN HOUR.

IF YOU ARE IN THE PATH OF THIS TORNADO...GO TO A BASEMENT SHELTER
IF ONE IS AVAILABLE. OTHERWISE GO TO A CENTRAL INTERIOR ROOM ON THE
LOWEST FLOOR. ABANDON VEHICLES AND MOBILE HOMES FOR A REINFORCED
BUILDING OR A LOW AREA.

PFEIFFER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 7:38 PM CDTSevere Thunderstorm WarningABRBeadle37 min
Jul 10, 8:15 PM CDTSevere Thunderstorm WarningABRPotter60 min
Jul 10, 8:38 PM CDTSevere Thunderstorm WarningABRClark67 min
Jul 10, 9:11 PM CDTSevere Thunderstorm WarningABRWalworth64 min
Jul 11, 3:49 AM CDTSevere Thunderstorm WarningABRBrown, Day56 min

Nearby

Tornado Warnings in South Dakota, 1989Every tornado warning in 1989Tornadoes in 1989

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.