Alert archive / South Dakota / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 39, NWS Aberdeen, SD

July 3, 1995Walworth County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 3, 1995, 6:57 PM CDT for Walworth County, South Dakota. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Jul 3, 1995, 6:57 PM CDT (23:57 UTC)
Expired
Jul 3, 1995, 7:44 PM CDT
In force
47 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Walworth County, SD

The radar

The Aberdeen radar (KABR), 126 km from the middle of the area, began a volume at 23:56 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, 12.0 hours before the alert went out and 141 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 1995-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 347 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 1995-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -64 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
347 J/kg
Mixed-layer CIN
-262 J/kg
Mixed-layer LCL
952 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-64 m²/s²
0-3 km storm-relative helicity
22 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 KABR 032357 RRA
SVRABR
SDC129-040100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
657 PM CDT MON JUL 3 1995

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM CDT (700 PM MDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL SOUTH DAKOTA

   ...WALWORTH COUNTY
 
AT 656 PM CDT...A SEVERE THUNDERSTORM WAS DETECTED BY ABERDEEN
DOPPLER RADAR 11 MILES SOUTHWEST OF MOBRIDGE MOVING NORTHEAST AT 23
MPH.

THIS SEVERE THUNDERSTORM WILL REACH...
MOBRIDGE                               BY 725 PM CDT
GLENHAM                                BY 743 PM CDT
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING AND
VERY HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA. IF YOU ARE
IN THE PATH OF THIS STORM TAKE ACTION NOW TO PROTECT YOUR FAMILY...
YOURSELF AND YOUR PROPERTY.

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, Jul 3, 4:36 PM CDT, 2 hours 21 minutes before
SDZ003>011-015>018-040340-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
438 PM CDT (338 PM MDT) MON JUL 3 1995

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 10 PM FOR ALL OF
NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA...

THE AIRMASS OVER NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA HAS BECOME
VERY UNSTABLE AHEAD OF AN ADVANCING STRONG UPPER LEVEL AREA OF LOW
PRESSURE. THIS WILL ALLOW SEVERE THUNDERSTORMS TO DEVELOP LATE THIS
AFTERNOON AND EVENING.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE
THUNDERSTORMS TO DEVELOP AND PRODUCE LARGE HAIL AND DAMAGING WINDS.

AT 430 PM...THE STRONGEST THUNDERSTORM WAS LOCATED NEAR LANGTREE ABOUT
5 MILES EAST OF DUPREE.  OTHERWISE...AN AREA OF STRONG
THUNDERSTORMS WERE MOVING INTO THE WESTERN END OF CORSON AND DEWEY
COUNTIES.  THESE THUNDERSTORMS WERE MOVING NORTH AT 20 MILES AN HOUR.

KEEP UP WITH THE LATEST WEATHER INFORMATION AND POSSIBLE WARNINGS.

IF YOU ARE OUTDOORS WHEN THUNDERSTORMS APPROACH...MOVE TO A PLACE OF
SHELTER IMMEDIATELY. BOATERS ARE URGED TO MOVE ONTO SHORE QUICKLY
AND SEEK REFUGE IN A BUILDING. CAMPERS WITHOUT BUILDINGS AVAILABLE
SHOULD MOVE FROM TENTS INTO FULLY ENCLOSED AUTOMOBILES...IF POSSIBLE...
FOR LIGHTNING PROTECTION.

GUERRERO/MIDDLEBROOKE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 10:04 PM CDTSevere Thunderstorm WarningABRMarshall, Roberts46 min
Jul 3, 5:25 PM CDTSevere Thunderstorm WarningABRClark50 min
Jul 3, 5:34 PM CDTSevere Thunderstorm WarningABRDewey61 min
Jul 3, 5:45 PM CDTSevere Thunderstorm WarningABRSpink65 min
Jul 3, 5:50 PM CDTTornado WarningABRClark40 min
Jul 3, 6:26 PM CDTSevere Thunderstorm WarningABRCorson64 min
Jul 3, 6:38 PM CDTSevere Thunderstorm WarningABRSpink62 min
Jul 3, 6:49 PM CDTSevere Thunderstorm WarningABRDewey66 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.