Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 105, NWS Sioux Falls, SD

August 28, 1995Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 28, 1995, 5:16 PM CDT for Yankton County, South Dakota. It was in force for 34 min.

The area

The counties it named.

The facts

Issued
Aug 28, 1995, 5:16 PM CDT (22:16 UTC)
Expired
Aug 28, 1995, 5:50 PM CDT
In force
34 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 22:17 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, 10.3 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 1995-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1741 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 1995-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1741 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1451 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
69 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 282216 RRA
SVRFSD
SDC135-282250-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
516 PM CDT MON AUG 28 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 550 PM CDT (450 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...YANKTON COUNTY
 
AT 514 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY SIOUX FALLS
DOPPLER RADAR 13 MILES NORTHWEST OF YANKTON  OR 2 MILES SOUTH OF
LESTERVILLE MOVING EAST AT 28 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
LESTERVILLE              AROUND 520 PM CDT
UTICA                    AROUND 525 PM CDT
MIDWAY                   AROUND 541 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.  MO0TORISTS SHOULD AVOID FLOODED ROADWAYS.

HOLMES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 4:19 PM CDTTornado WarningFSDMcCook31 min
Aug 28, 4:51 PM CDTSevere Thunderstorm WarningFSDMcCook34 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

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.