Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 19, NWS Sioux Falls, SD

July 28, 1986Bon Homme County, Hutchinson County, Yankton County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 28, 1986, 6:52 PM CDT for Bon Homme County, Hutchinson County, Yankton County, South Dakota. It was in force for 38 min.

The area

The counties it named.

The facts

Issued
Jul 28, 1986, 6:52 PM CDT (23:52 UTC)
Expired
Jul 28, 1986, 7:30 PM CDT
In force
38 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Bon Homme County, SD, Hutchinson County, SD, Yankton 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, 11.9 hours before the alert went out and 207 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 1986-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2250 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 12:00Z on 1986-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
2250 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1025 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 282352
TORFSD
SDC009-135-067-290030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
652 PM CDT MON JUL 28 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTHEAST SOUTH DAKOTA...NORTHERN BON-HOMME...NORTHERN YANKTON AND 
 EXTREME SOUTHERN CENTRAL HUTCHINSON

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE KAYLOR AND SCOTLAND
SOUTH DAKOTA.

AT 639 PM CDT  A FUNNEL CLOUD WAS REPORTED 8 MILES EAST OF TRIPP
SOUTH DAKOTA.

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 4:46 PM CDTSevere Thunderstorm WarningFSDAurora, Brule59 min
Jul 28, 5:47 PM CDTSevere Thunderstorm WarningFSDAurora, Brule58 min
Jul 28, 5:47 PM CDTSevere Thunderstorm WarningFSDDavison, Douglas58 min
Jul 28, 5:54 PM CDTSevere Thunderstorm WarningFSDClay66 min
Jul 28, 5:58 PM CDTSevere Thunderstorm WarningFSDUnion62 min
Jul 28, 6:10 PM CDTTornado WarningFSDDouglas, Hutchinson35 min
Jul 28, 6:41 PM CDTTornado WarningFSDUnion34 min

Nearby

Tornado Warnings in South Dakota, 1986Every tornado warning in 1986Tornadoes in 1986

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.