Alert archive / South Dakota / Tornado Warnings in 1987

Tornado Warning 13, NWS Aberdeen, SD

July 10, 1987Sully County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 10, 1987, 5:53 PM CDT for Sully County, South Dakota. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Jul 10, 1987, 5:53 PM CDT (22:53 UTC)
Expired
Jul 10, 1987, 6:30 PM CDT
In force
37 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Sully 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, 10.9 hours before the alert went out and 138 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 1987-07-10Temperature 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 1987-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1127 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
114 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 102253
TORHON
SDC119-102330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE HURON SD
553 PM CDT FRI JUL 10 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

CENTRAL SOUTH DAKOTA...SULLY

THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE ONIDA AND AGAR.

AT 545 PM CDT   A FUNNEL CLOUD WAS REPORTED BY THE PUBLIC 20 MILES
NORTHEAST OF PIERRE...NEAR ONIDA. MOVEMENT WAS NORTHEAST AT 35
MILES AN HOUR.

 SEVERAL FUNNEL CLOUDS WERE REPORTED.

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.

EDDY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 7:20 PM CDTTornado WarningABRBrown25 min
Jul 9, 8:13 PM CDTTornado WarningABRDay32 min
Jul 10, 4:26 PM CDTSevere Thunderstorm WarningABRJones64 min
Jul 10, 4:50 PM CDTSevere Thunderstorm WarningABRStanley55 min
Jul 10, 5:06 PM CDTTornado WarningABRStanley39 min
Jul 10, 6:05 PM CDTSevere Thunderstorm WarningABRStanley55 min
Jul 10, 6:13 PM CDTSevere Thunderstorm WarningABRPotter, Walworth62 min
Jul 10, 6:55 PM CDTSevere Thunderstorm WarningABREdmunds65 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.