Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 96, NWS Sioux Falls, SD

August 18, 1995Bon Homme County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 18, 1995, 6:29 PM CDT for Bon Homme County, South Dakota. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1995, 6:29 PM CDT (23:29 UTC)
Expired
Aug 18, 1995, 7:00 PM CDT
In force
31 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Bon Homme County, SD

The radar

The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 23:33 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, 11.5 hours before the alert went out and 217 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 1995-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2740 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 1995-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 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
2740 J/kg
Mixed-layer CIN
-181 J/kg
Mixed-layer LCL
1210 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
121 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 182330 RRA
SVRFSD
SDC009-190000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
629 PM CDT FRI AUG 18 1995

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT 
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...CENTRAL AND NORTHEASTERN BON HOMME COUNTY
 
AT 627 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR IN SIOUX FALLS 28 MILES WEST OF
YANKTON OR NEAR TYNDALL MOVING NORTHEAST AT 25 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
TYNDALL                  AROUND 630 PM CDT
SCOTLAND                 AROUND 650 PM CDT

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM.
 
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.


CHAPMAN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 18, 1:00 PM CDT, 5 hours 29 minutes before
SDZ020>023-039-040-054>056-060>062-065>067-068>070-190400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
100 PM CDT FRI AUG 18 1995

...TORNADO WATCH CANCELLED FOR SOUTH DAKOTA...

THE NATIONAL WEATHER SERVICE HAS CANCELLED THE PART OF TORNADO WATCH
NUMBER 951 THAT WAS IN EFFECT FOR EAST CENTRAL AND SOUTHEAST SOUTH
DAKOTA. SEVERE WEATHER IS NO LONGER A THREAT OVER THE AREA.

WILLIAMS
Local storm report, Aug 18, 1:27 PM CDT, 5 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
127 PM CDT FRI AUG 18 1995

TIME(CDT)     .....CITY LOCATION.....   STATE   ...EVENT/REMARKS...
              ....COUNTY LOCATION....

0445 TO       2 E GANN VALLEY           SD      50 TO 60 MPH WINDS.
0530 AM       5 S GANN VALLEY                   TREES DOWN... LARGE
08/18/95      BUFFALO                           BRANCHES BROKEN OFF

1050 AM       2 SE SPRING LAKE          SD      55 TO 70 MPH WINDS.
08/18/95      HYDE                              DOORS ON BOTH ENDS
                                                OF METAL OUT-BUILDING
                                                BLOWN OFF... METAL
                                                SIDING BLOWN OFF

...JFP
Local storm report, Aug 18, 1:28 PM CDT, 5 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
127 PM CDT FRI AUG 18 1995

TIME(CDT)     .....CITY LOCATION.....   STATE   ...EVENT/REMARKS...
              ....COUNTY LOCATION....

0445 TO       2 E GANN VALLEY           SD      50 TO 60 MPH WINDS.
0530 AM       5 S GANN VALLEY                   TREES DOWN... LARGE
08/18/95      BUFFALO                           BRANCHES BROKEN OFF

1050 AM       2 SE SPRING LAKE          SD      55 TO 70 MPH WINDS.
08/18/95      HYDE                              DOORS ON BOTH ENDS
                                                OF METAL OUT-BUILDING
                                                BLOWN OFF... METAL
                     z                           SIDING BLOWN OFF

...JFP

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.