Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 76, NWS Sioux Falls, SD

August 4, 1995Gregory County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 4, 1995, 7:02 PM CDT for Gregory County, South Dakota. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Aug 4, 1995, 7:02 PM CDT (00:02 UTC)
Expired
Aug 4, 1995, 7:50 PM CDT
In force
48 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Gregory County, SD

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.0 hours before the alert went out and 200 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 1995-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1364 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 1995-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
1364 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1136 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 050003 RRA
SVRFSD
SDC053-050050-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
702 PM CDT FRI AUG 4 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 750 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL SOUTH DAKOTA

   ...GREGORY COUNTY
 
AT 700 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 17 MILES EAST OF WINNER  OR 3 MILES NORTH OF DALLAS
MOVING EAST AT 17 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
DALLAS                   AROUND 712 PM CDT
GREGORY                  AROUND 721 PM CDT
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG...REINFORCED BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE
TELEPHONES UNLESS IT IS AN EMERGENCY OR ELECTRICAL APPLIANCES UNTIL
THE STORM HAS PASSED.  MOTORISTS SHOULD AVOID FLOODED ROADWAYS.

MED

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 8:47 PM CDTSevere Thunderstorm WarningFSDTodd48 min
Aug 4, 9:31 PM CDTSevere Thunderstorm WarningFSDTodd49 min
Aug 4, 9:35 PM CDTSevere Thunderstorm WarningFSDTodd45 min
Aug 4, 11:08 PM CDTSevere Thunderstorm WarningFSDHanson16 min
Aug 5, 1:24 AM CDTSevere Thunderstorm WarningFSDMcCook36 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1995Every severe thunderstorm warning in 1995

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.