Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 97, NWS Sioux Falls, SD

August 18, 1995Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 18, 1995, 7:26 PM CDT for Yankton County, South Dakota. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1995, 7:26 PM CDT (00:26 UTC)
Expired
Aug 18, 1995, 7:55 PM CDT
In force
29 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Yankton County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.4 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 00:00Z on 1995-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2198 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 00:00Z on 1995-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
2198 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1567 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 190026 RRA
SVRFSD
SDC135-190055-

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

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 755 PM CDT 
FOR PEOPLE IN
THE FOLLOWING LOCATION...

IN SOUTHEAST SOUTH DAKOTA

   ...CENTRAL AND NORTHERN YANKTON COUNTY
 
AT 721 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR IN SIOUX FALLS 14 MILES NORTHWEST OF
YANKTON OR JUST EAST OF LESTERVILLE MOVING NORTHEAST AT 25 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
JAMESVILLE               AROUND 740 PM CDT
VEDIN CORNER             AROUND 740 PM CDT
MIDWAY                   AROUND 745 PM CDT

THIS STORM HAS A HISTORY OF PRODUCING NICKEL SIZE HAIL NEAR
TYNDALL IN BON HOMME COUNTY.
 
IF SEVERE WEATHER IS OBSERVED...CONTACT YOUR LOCAL LAW ENFORCEMENT
AGENCY AND ASK THEM TO RELAY YOUR INFORMATION TO THE NATIONAL
WEATHER SERVICE.

ADVANCE PLANNING IS ESSENTIAL DURING A TORNADO WATCH. YOU SHOULD
KNOW WHERE THE SAFEST AREAS OF YOUR HOME OR BUSINESS ARE LOCATED...
SUCH AS INTERIOR ROOMS ON THE LOWEST FLOOR POSSIBLE.

CHAPMAhN
&

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

Local storm report, Aug 18, 1:27 PM CDT, 5 hours 59 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 58 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
                     z                           SIDING BLOWN OFF

...JFP

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 7:37 PM CDTSevere Thunderstorm WarningFSDClay, Yankton33 min
Aug 18, 8:12 PM CDTSevere Thunderstorm WarningFSDClay33 min
Aug 18, 8:45 PM CDTSevere Thunderstorm WarningFSDUnion21 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.