Alert archive / South Dakota / Tornado Warnings in 1986

Tornado Warning 8, NWS Aberdeen, SD

June 21, 1986Miner County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 21, 1986, 7:37 PM CDT for Miner County, South Dakota. It was in force for 38 min.

The area

The counties it named.

The facts

Issued
Jun 21, 1986, 7:37 PM CDT (00:37 UTC)
Expired
Jun 21, 1986, 8:15 PM CDT
In force
38 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Miner 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 00:00Z, 0.6 hours before the alert went out and 116 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 00:00Z on 1986-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3109 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 00:00Z on 1986-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
3109 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1356 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHON 220037
TORHON
SDC097-220115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE HURON SD
737 PM CDT SAT JUN 21 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 815 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

EAST CENTRAL SOUTH DAKOTA...EASTERN MINER

SOME OF THE CITIES INCLUDED IN THE WARNING AREA ARE CANOVA...
WINFRED...AND HOWARD.

AT 730 PM CDT  RADAR INDICATED A POSSIBLE TORNADO JUST NORTH OF
 CANOVA..OR 50 MILES SOUTHEAST OF HURON..MOVING EAST AT 15 MILES AN
 HOUR.

AT 730 PM CDT  A FUNNEL CLOUD WAS REPORTED NEAR CANOVA.

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.

MORRIS/SPRINGER

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 21, 4:53 PM CDT, 2 hours 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
450 PM CDT SAT JUN 21 1986

...A TORNADO WATCH IS IN EFFECT UNTIL 1000 PM CDT FOR
PARTS OF EASTERN SOUTH DAKOTA...

AT 445 PM CDT RADAR INDICATED AN AREA OF THUNDERSTORMS IN CLARK AND
CODINGTON COUNTIES IN EASTERN SOUTH DAKOTA. THESE STORMS WERE MOVING
NORTHEAST AT 15 MPH AND MAY MOVE ACROSS SOUTHERN ROBERTS AND SOUTHERN
DAY COUNTIES WITHIN THE NEXT HOUR.

INDIVIDUALS IN THE PATH OF THIS AREA OF THUNDERSTORMS SHOULD BE ALERT
FOR HEAVY RAIN..SMALL HAIL..GUSTY SURFACE WINDS AND DANGEROUS LIGHTNING.

THESE STORMS MAY BECOME SEVERE WITH LITTLE NOTICE. BE ON THE ALERT
FOR SEVERE WEATHER AND TAKE SHELTER IMMEDIATELY.
HUSTO#N

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 12:14 AM CDTSevere Thunderstorm WarningABRMiner61 min
Jun 22, 12:29 AM CDTSevere Thunderstorm WarningABRHamlin, Kingsbury61 min
Jun 22, 12:29 AM CDTSevere Thunderstorm WarningABRDeuel61 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.