Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 117, NWS Sioux Falls, SD

September 2, 1995Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Sep 2, 1995, 9:20 AM CDT for Yankton County, South Dakota. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Sep 2, 1995, 9:20 AM CDT (14:20 UTC)
Expired
Sep 2, 1995, 10:01 AM CDT
In force
41 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 84 km from the middle of the area, began a volume at 14:19 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

Omaha, NE (KOAX), launched 12:00Z, 2.3 hours before the alert went out and 206 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, Omaha, NE at 12:00Z on 1995-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Omaha, NE at 12:00Z on 1995-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1322 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
541 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 021420 RRA
SVRFSD
SDC135-021505-

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1005 AM CDT 
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...EASTERN YANKTON COUNTY
 
AT 916 AM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 21 MILES NORTH OF YANKTON  OR 6 MILES NORTHEAST OF
MAYFIELD MOVING SOUTHEAST AT 35 MPH. AT 850 AM CDT THIS SEVERE
THUNDERSTORM PRODUCED GOLFBALL SIZE HAIL AT MARION IN TURNER
COUNTY.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
VOLIN                    AROUND 941 AM CDT
GAYVILLE                 AROUND 949 AM CDT

WB
 
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 OF YOUR
HOME OR BUSINESS.

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, 7:58 AM CDTSevere Thunderstorm WarningFSDMcCook47 min
Sep 2, 8:07 AM CDTSevere Thunderstorm WarningFSDMinnehaha, Moody24 min
Sep 2, 8:40 AM CDTSevere Thunderstorm WarningFSDTurner45 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.