Alert archive / South Dakota / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 66, NWS Sioux Falls, SD

July 7, 1992Clay County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 7, 1992, 9:09 PM CDT for Clay County, South Dakota. It was in force for 51 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1992, 9:09 PM CDT (02:09 UTC)
Expired
Jul 7, 1992, 10:00 PM CDT
In force
51 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Clay County, SD

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 2.2 hours before the alert went out and 184 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 1992-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2090 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 1992-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
2090 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1219 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 080211
SVRFSD
SDC027-080300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
909 PM CDT TUE JUL 7 1992
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHEAST SOUTH DAKOTA
 
   ...CLAY COUNTY
 
SOME CITIES INCLUDED IN THIS WARNING ARE VERMILLION...MECKLING.
 
AT 910 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES EAST OF
YANKTON. THE STORM WAS MOVING EAST AT 40 MPH AND WILL AFFECT MECKLING
AFTER 915 PM AND WILL REACH THE VERMILLION AREA BY 930 PM.
 
 
THIS WARNING INCLUDES THE ADJACENT WATERS OF THE MISSOURI RIVER.
 
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS
OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND HEAVY
RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA.
 
BIER

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 7, 6:50 PM CDT, 2 hours 19 minutes before
SDZ010-080045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
645 PM CDT TUE JUL 7 1992

AT 645 PM CDT...A STRONG THUNDERSTORM HAD MOVED INTO CENTRAL SOUTH
DAKOTA. THE STORM WAS 40 MILES SOUTHWEST OF PIERRE...OR JUST EAST OF
MURDO...MOVING EAST AT 50 MILES AN HOUR.

VERY HEAVY RAIN AND HAIL ARE LIKELY OVER SOUTHEAST JONES AND SOUTHERN
LYMAN COUNTY UNTIL AROUND 8 PM CDT.

BECAUSE THE STORMS IS MOVING AT A HIGH SPEED...WIND GUSTS OF 5V0 MPH
OR HIGHER ARE LIKELY AS WELL.

SPRINGER
Special weather statement, Jul 7, 7:40 PM CDT, 1 hour 29 minutes before
SDZ010-080130-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
735 PM CDT TUE JUL 7 1992

...A SEVERE THUNDERSTORM WARNING FOR SOUTHEAST JONES AND SOUTHWEST LYMAN
COUNTIES UNTIL 8PM CDT...

AT 730 PM CDT...A STRONG THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED
OVER EXTREME SOUTHEAST JONES AND SOUTHWEST LYMAN COUNTY...10 MILES SOUTHWEST
PRESHO OR ABOUT 35 MILES SOUTH OF PIERRE.

THE STORMS WAS MOVING EAST AT 45 MILES AN HOUR.

MILLER
Special weather statement, Jul 7, 7:43 PM CDT, 1 hour 26 minutes before
SDZ015-080130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
740 PM CDT TUE JUL 7 1992

...VERY STRONG THUNDERSTORM MOVING TOWARD NORTHEAST TRIPP COUNTY IN
   SOUTH CENTRAL SOUITH DAKOTA...

A VERY STRONG THUNDERSTORM 40 MILES NORTHWEST OF WINNER WAS MOVING
SOUTHEAST AT 45 MPH AND WILL ENTER NORTHEAST TRIPP COUNTY OF SOUTH
CENTRAL SOUTH DAKOTA BY 745 PM CDT AND IS EXPECTED TO AFFECT THE TOWNS
OF IDEAL AND HAMILL BETWEEN ABOUT 755 PM AND 830 PM.

VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS AROUND 50 MPH
SHOULD BE EXPECTED WITH THIS STORM. PERSONS IN THE PATH OF THIS STORM
SHOULD BE PREPARED TO TAKE COVER.

BIER
Special weather statement, Jul 7, 8:22 PM CDT, 47 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
822 PM CDT TUE JUL 7 1992

...THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST SOUTH DAKOTA...

AT 820 PM CDT A THUNDERSTORM WAS 45 MILES NORTHWEST OF SIOUX CITY
NEAR BERESFORD SOUTH DAKOTA. THIS WAS PART OF A LARGER AREA OF
THUNDERSTORMS WHICH EXTENDED FURTHER WEST. MOVEMENT WAS EAST AT
35 MILES AN HOUR.

THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING SMALL HAIL AND WIND
GUSTS UP TO 40 MILES AN HOUR. THEY WILL PASS THROUGH AKRON IOWA
AND ELK POINT SOUTH DAKOTA BY 9 PM.

DROZD
Special weather statement, Jul 7, 8:39 PM CDT, 30 minutes before
SDZ016-018-020-080245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
836 PM CDT TUE JUL 7 1992

...THUNDERSTORMS RUMBLING ACROSS SOUTH CENTRAL AND SOUTHEAST SOUTH
DAKOTA...

AT 830 PM CDT...A THUNDERSTORM WITH VERY HEAVY RAIN AND SMALL HAIL WAS
MOVING THROUGH SOUTH CENTRAL SOUTH DAKOTA...20 MILES SOUTHWEST OF
CHAMBERLAIN. THIS STORM HAD PREVIOUSLY BEEN AT SEVERE LEVELS. THE STORM
WAS MOVING EAST AT 40 MPH AND WILL MOVE TO NEAR PLANKINTON AND STICKNEY
BY 930 PM.

IN FAR SOUTHEAST SOUTH DAKOTA...THUNDERSTORMS WITH VERY HEAVY
RAINS...SMALL HAIL...AND GUSTY WINDS WERE LOCATED TO THE SOUTH OF A
LINE FROM JUST WEST OF YANKTON TO NEAR LENNOX. THESE STORMS ARE ALSO
MOVING EAST AT 40 MPH AND WILL MOVE INTO WESTERN SIOUX COUNTY OF
NORTHWEST IOWA BY 915 PM.

NONE OF THESE THUNDERSTORMS ARE CURRENTLY SEVERE. HOWEVER...PERSONS IN
THEIR PATHS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND SEEK
SAFE SHELTER IF NECQESSARY. LISTEN TO RADIO OR TV FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

GEELHART
Special weather statement, Jul 7, 9:02 PM CDT, 7 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080240-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
902 PM CDT TUE JUL 7 1992

...STRONG THUNDERSTORMS WERE OVER SOUTHEAST SOUTH DAKOTA...

AT 9 PM CDT THUNDERSTORMS WERE SOUTH OF A LINE FROM CHATASWORTH
IOWA... MILES NORTH OF SIOUX CITY TO JUNCTION CITY SOUTH DAKOTA.
MOVEMENT WAS EAST AT 40 MILES AN HOUR.

THESE THUNDERSTORMS WILL LIKELY PRODUCE SMALL HAIL...WIND GUSTS TO
40 MILE'S AN HOUR AND VERY HEAVY RAIN. THEY WILL AFFECT SPINK...NORA
AND BIG SPRINGS SOUTH DAKOTA THROUGH 930 PM.

DROZD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 9:31 PM CDTSevere Thunderstorm WarningFSDUnion44 min
Jul 7, 9:52 PM CDTTornado WarningFSDClay25 min
Jul 7, 10:02 PM CDTSevere Thunderstorm WarningFSDUnion28 min
Jul 7, 10:41 PM CDTSevere Thunderstorm WarningFSDBon Homme49 min
Jul 8, 12:06 AM CDTSevere Thunderstorm WarningFSDUnion54 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1992Every severe thunderstorm warning in 1992

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.