Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 1, NWS Sioux Falls, SD

April 26, 1986Turner County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Apr 26, 1986, 5:27 PM CST for Turner County, South Dakota. It was in force for 33 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
Apr 26, 1986, 5:27 PM CST (23:27 UTC)
Expired
Apr 26, 1986, 6:00 PM CST
In force
33 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Turner 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
Apr 26, 5:37 PM CSTTornado F2Turner, 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, 11.5 hours before the alert went out and 203 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 1986-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 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 1986-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939587897Sfc1 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
5 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
486 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
158 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 KFSD 262327
TORFSD
SDC125-270000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
527 PM CST SAT APR 26 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 600 PM CST FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHEAST SOUTH DAKOTA...TURNER

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA..VIBERG
HURLEY..PARKER

AT 523 PM CST  A TORNADO WAS REPORTED 2 TO 3 MILES WEST OF
HURLEY MOVING EAST NORTHEAST TO 25 TO 30 MPH.

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 M*OBILE HOMES SHOULD BE ABANDONED FOR
A REINFORCED BUILDING.

KOSCIELSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 3:39 PM CSTSevere Thunderstorm WarningFSDBon Homme, Charles Mix66 min
Apr 26, 4:13 PM CSTSevere Thunderstorm WarningFSDHutchinson, Turner, Yankton62 min
Apr 26, 5:07 PM CSTSevere Thunderstorm WarningFSDLincoln, Minnehaha, Turner68 min
Apr 26, 5:41 PM CSTTornado WarningFSDLincoln34 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.