Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 114, NWS Sioux Falls, SD

September 2, 1995McCook County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Sep 2, 1995, 7:58 AM CDT for McCook County, South Dakota. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Sep 2, 1995, 7:58 AM CDT (12:58 UTC)
Expired
Sep 2, 1995, 8:45 AM CDT
In force
47 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County McCook County, SD

The radar

The Sioux Falls radar (KFSD), 52 km from the middle of the area, began a volume at 12:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 1.0 hours before the alert went out and 159 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 1995-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 841 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 1995-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
841 J/kg
Mixed-layer CIN
-179 J/kg
Mixed-layer LCL
620 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 021258
SVRFSD
SDC087-021345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
758 AM CDT SAT SEP 2 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 845 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...MCCOOK COUNTY
 
AT 756 AM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 30 MILES EAST OF MITCHELL  OR 2 MILES NORTHEAST OF
UNITYVILLE MOVING SOUTHEAST AT 34 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
UNITYVILLE               AROUND 801 AM CDT
SALEM                    AROUND 809 AM CDT
MONTROSE                 AROUND 822 AM CDT
CANISTOTA                AROUND 826 AM CDT
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OZF YOUR
HOME OR BUSINESS.

MED

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 5:20 AM CDTSevere Thunderstorm WarningFSDClark30 min
Sep 2, 5:56 AM CDTSevere Thunderstorm WarningFSDClark52 min
Sep 2, 6:25 AM CDTSevere Thunderstorm WarningFSDHamlin30 min
Sep 2, 6:54 AM CDTSevere Thunderstorm WarningFSDKingsbury40 min
Sep 2, 8:07 AM CDTSevere Thunderstorm WarningFSDMinnehaha, Moody24 min
Sep 2, 8:40 AM CDTSevere Thunderstorm WarningFSDTurner45 min
Sep 2, 9:20 AM CDTSevere Thunderstorm WarningFSDYankton41 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; radar from the NEXRAD Level II archive.