Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 8, NWS Sioux Falls, SD

June 10, 1986Douglas County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 10, 1986, 2:20 PM CDT for Douglas County, South Dakota. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Jun 10, 1986, 2:20 PM CDT (19:20 UTC)
Expired
Jun 10, 1986, 2:45 PM CDT
In force
25 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Douglas 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, 7.3 hours before the alert went out and 168 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 1986-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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 1986-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
22 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
42 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 101920
TORFSD
SDC043-101945-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
220 PM CDT TUE JUN 10 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 245 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTH CENTRAL SOUTH DAKOTA...DOUGLAS

SOME OF THE CITIES INCLUDED IN SOUTHEAST SOUTH DAKOTA...ARMOUR

AT 210 PM CDT  A TORNADO WAS REPORTED 5 MILES SOUTHWEST OF ARMOUR
AND ANOTHER JUST EAST OF ARMOUR BY THE DOUGAS COUNTY SHERRIFF.
ANOTHER REPORT WAS RECEIVED OF A TORNADO NORTHEAST OF LAKE ANDES.

IF YOU ARE IN THE PATH OF THIS TORNADO...YOU SHOULD GO TO A BASEMENT
SHELTER IF AVAILABLE. OTHERWLISE GO TO A CENTRAL INTERIOR ROOM ON THE
LOWEST FLOOR POSSIBLE. CARS AND MOBILE HOMES SHOULD BE ABANDONED FOR
A REINFORCED BUILDING.

WILLIAMS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 6:10 PM CDTTornado WarningFSDClay35 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.