Alert archive / South Dakota / Tornado Warnings in 1995

Tornado Warning 9, NWS Sioux Falls, SD

August 28, 1995McCook County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Aug 28, 1995, 4:19 PM CDT for McCook County, South Dakota. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Aug 28, 1995, 4:19 PM CDT (21:19 UTC)
Expired
Aug 28, 1995, 4:50 PM CDT
In force
31 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 21:18 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, 9.3 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 1995-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 377 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 1995-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.193958Sfc1 km3 km6 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
377 J/kg
Mixed-layer CIN
-381 J/kg
Mixed-layer LCL
969 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 282121
TORFSD
SDC087-282150-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
419 PM CDT MON AUG 28 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 450 PM CDT (350 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...SOUTHWESTERN MCCOOK COUNTY
 
AT 416 PM CDT...A DEVELOPING TORNADO WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 25 MILES SOUTHEAST OF MITCHELL OR NEAR BRIDGEWATER
MOVING NORTHEAST AT 15 MPH.

AT PRESENT MOVEMENT THE TORNADO WILL REMAIN IN RURAL AREAS...
 
DO NOT USE YOUR CAR TO OUTRUN A TORNADO.  CARS ARE EASILY TOSSED
AROUND BY TORNADIC WINDS.  IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG REINFORCED BUILDING.  IF
NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 4:51 PM CDTSevere Thunderstorm WarningFSDMcCook34 min
Aug 28, 5:16 PM CDTSevere Thunderstorm WarningFSDYankton34 min
Aug 28, 5:22 PM CDTSevere Thunderstorm WarningFSDLincoln33 min
Aug 28, 5:36 PM CDTTornado WarningFSDLincoln34 min
Aug 28, 6:19 PM CDTSevere Thunderstorm WarningFSDLincoln, Union31 min

Nearby

Tornado Warnings in South Dakota, 1995Every tornado warning in 1995Tornadoes 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.