Alert archive / South Dakota / Tornado Warnings in 1993

Tornado Warning 22, NWS Sioux Falls, SD

July 22, 1993Brule County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 22, 1993, 6:51 PM CDT for Brule County, South Dakota. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Jul 22, 1993, 6:51 PM CDT (23:51 UTC)
Expired
Jul 22, 1993, 7:30 PM CDT
In force
39 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Brule County, SD

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 11.9 hours before the alert went out and 142 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 1993-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 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 1993-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
19 J/kg
Mixed-layer CIN
-234 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
150 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 222353
TORFSD
SDC015-230030-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
651 PM CDT THU JUL 22 1993
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL SOUTH DAKOTA
 
   ...NORTHERN BRULE COUNTY
 
AT 650 PM CDT A TORNADO WAS INDICATED BY RADAR 5 MILES NORTH OF
CHAMBERLAIN SOUTH DAKOTA MOVING TO THE EAST AT 35 MILES AN HOUR. THERE
ARE NO TOWNS IN THE PATH OF THIS TORNADO BUT PERSONS LIVING IN NORTHERN
BRULE COUNTY NEAR THE COUNTY LINE WITH BUFFALO COUNTY ARE IN ITS PATH
AND SHOULD MOVE IMMEDIATELY TO A PLACE OF SAFETY.
 
THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.
 
A TORNADO WATCH IS IN EFFECT FOR PARTS OF CENTRAL SOUTH DAKOTA.
 
THIS IS A DANGEROUS STORM.  MOVE QUICKLY TO UNDERGROUND SHELTER IF
AVAILABLE.  OTHERWISE...GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR AN
AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING.
 
DIRCKSEN

Nearby

Tornado Warnings in South Dakota, 1993Every tornado warning in 1993Tornadoes in 1993

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.