Alert archive / South Dakota / Tornado Warnings in 1990

Tornado Warning 11, NWS Aberdeen, SD

July 27, 1990Spink County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jul 27, 1990, 1:43 PM CDT for Spink County, South Dakota. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Jul 27, 1990, 1:43 PM CDT (18:43 UTC)
Expired
Jul 27, 1990, 2:15 PM CDT
In force
32 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Spink 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, 6.7 hours before the alert went out and 6 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 1990-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1833 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 1990-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939Sfc1 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
1833 J/kg
Mixed-layer CIN
-80 J/kg
Mixed-layer LCL
702 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KABR 271843
TORABR
SDC115-271915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE ABERDEEN SD
143 PM CDT FRI JUL 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 215 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTHEAST PART OF SOUTH DAKOTA
      SPINK

SOME OF THE CITIES INCLUDED IN THIS WARNING ARE REDFIELD...DOLAND
FRANKFORT.

AT 139 PM CDT  A TORNADO WAS REPORTED BY THE SPINK COUNTY SHERIFF.
THE THUNDERSTORM THAT HAS PRODUCED THIS TORNADO IS MOVING NORTHEAST
 AT 25 MPH.

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

GILLESPIE

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, Jul 27, 7:46 AM CDT, 5 hours 57 minutes before
SDZ004-011-271315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
745 AM CDT FRI JUL 27 1990

AT 740 AM CDT RADAR INDICATED THE SEVERE THUNDERSTORM OVER SOUTHEAST
SPINK COUNTY HAS WEAKENED TO THE POINT OF HAVING SOME AREAS OF SMALL
HAIL AND MODERATE TO HEAVY RAIN. THE SEVERE THUNDERSTORM WARNING HAS
BEEN CANCELLED AND IS NOT EXPECTED TO BE REISSUED AT THIS TIME.

ADDITIONAL THUNDERSTORMS CONTINUE TO PRODUCE VARIOUS AMOUNT OF RAIN
OVER SOUTHERN SPINK COUNTY. WITH THIS ADDITIONAL PRECIPITATION THE
SMALL STREAM AND URBAN FLOODING ADVISORY REMAINS IN EFFECT UNTIL 10
AM CDT.

ROADWAYS HAVE BEEN REPORTED TO BE COVERED IN RURAL AREAS AND THIS
CAN BE A VERY DANGEROUS SITUATION WITH THE GRAVEL BASE ROADS THAT
CAN BE WASHED AWAY IN A SHORT PERIOD OF TIME. THOSE TRAVELLING
SHOULD BE VERY CAREFUL ABOUT ATTEMPTING TO CROSS ANY MOVING WATER
ON ROADWAYS.                                       STUDNICKA
Special weather statement, Jul 27, 12:15 PM CDT, 1 hour 28 minutes before
SDZ004-271810-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1210 PM CDT FRI JUL 27 1990

AT 1205 PM CDT RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN NEAR
FAULKTON...45 MILES SOUTHWEST OF ABERDEEN MOVING NORTHEAST AT 15 MPH.

THIS STORM CAN PRODUCE SMALL HAIL..GUSTY WIND...AND HEAVY RAIN AS IT
MOVES THROUGH NORTHEAST SOUTH DAKOTA. THIS ADDITIONAL RAIN FALL IN AN
AREA THAT IS ALREADY NEARLY SATURATED COULD CAUSE FLOODING PROBLEMS.

IF YOU LIVE IN FAULK OR SPINK COUNTY YOU SHOULD BE ALERT TO THIS STORM
AND BE PREPARED TO TAKE STEPS TO PROTECT YOURSELF AND YOUR PROPERTY.
REMEMBER NEVER TRY TO DRIVE THROUGH A FLOODED AREA.

KEEFE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 7:39 PM CDTSevere Thunderstorm WarningABRDewey66 min
Jul 26, 8:52 PM CDTSevere Thunderstorm WarningABRDewey68 min
Jul 26, 9:39 PM CDTSevere Thunderstorm WarningABRPotter, Walworth66 min
Jul 26, 10:17 PM CDTSevere Thunderstorm WarningABRDewey58 min
Jul 27, 2:51 AM CDTSevere Thunderstorm WarningABRSpink69 min
Jul 27, 3:06 AM CDTSevere Thunderstorm WarningABRBrown69 min
Jul 27, 4:02 AM CDTSevere Thunderstorm WarningABRSpink58 min
Jul 27, 6:10 AM CDTSevere Thunderstorm WarningABRSpink35 min
Jul 27, 7:13 AM CDTSevere Thunderstorm WarningABRSpink62 min
Jul 27, 4:09 PM CDTSevere Thunderstorm WarningABRClark, Hamlin, Kingsbury66 min

Nearby

Tornado Warnings in South Dakota, 1990Every tornado warning in 1990Tornadoes in 1990

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.