Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 15, NWS Sioux Falls, SD

July 28, 1986Douglas County, Hutchinson County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 28, 1986, 6:10 PM CDT for Douglas County, Hutchinson County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Jul 28, 1986, 6:10 PM CDT (23:10 UTC)
Expired: Jul 28, 1986, 6:45 PM CDT
In force: 35 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Douglas County, SD, Hutchinson 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, 11.2 hours before the alert went out and 173 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: 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 282310
TORFSD
SDC043-067-282345-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTHEAST SOUTH DAKOTA...EASTERN DOUGLAS AND EXTREME WESTERN 
 HUTCHINSON

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE PARKSTON...CORSICA
AND ARMOUR 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.

BLOOM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 4:46 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	59 min
Jul 28, 5:47 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	58 min
Jul 28, 5:47 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Douglas	58 min
Jul 28, 5:54 PM CDT	Severe Thunderstorm Warning	FSD	Clay	66 min
Jul 28, 5:58 PM CDT	Severe Thunderstorm Warning	FSD	Union	62 min
Jul 28, 6:41 PM CDT	Tornado Warning	FSD	Union	34 min
Jul 28, 6:52 PM CDT	Tornado Warning	FSD	Bon Homme, Hutchinson, Yankton	38 min

Nearby

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