Alert archive / South Dakota / Tornado Warnings in 1993

Tornado Warning 16, NWS Sioux Falls, SD

June 12, 1993Brule County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 12, 1993, 10:35 PM CDT for Brule County, South Dakota. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1993, 10:35 PM CDT (03:35 UTC)
Expired
Jun 12, 1993, 11:15 PM CDT
In force
40 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Brule County, SD

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 3.6 hours before the alert went out and 307 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, Rapid City, SD at 00:00Z on 1993-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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, Rapid City, SD at 00:00Z on 1993-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
151 J/kg
Mixed-layer CIN
-287 J/kg
Mixed-layer LCL
1196 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this tornado 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, Jun 12, 4:50 PM CDT, 5 hours 45 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-122230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
449 PM CDT SAT JUN 12 1993

...SCATTERED STRONG THUNDERSTORMS WILL CONTINUE LATE THIS AFTERNOON...

AT 445 PM CDT A STRONG THUNDERSTORM WAS 25 MILES SOUTH OF SIOUX CITY...
OR WEST OF WHITING IOWA. MOVEMENT WAS NORTHEAST AT 25 MILES AN HOUR.

THIS STORM WILL PRODUCE HEAVY RAIN...DANGEROUS LIGHTNING AND SMALL HAIL
AS IT MOVES THROUGH WHITING...SLOAN AND HORNICK IOWA AROUND 515 PM.

OTHER STRONG THUNDERSTORMS PRODUCING HEAVY RAIN ARE EXPECTED TO MOVE
THROUGH BLENCOE AND ONAWA IOWA AROUND 530 PM. MORE HEAVY RAIN IS ALSO
EXPECTED TO CONTINUE ACROSS EASTERN CHEROKEE COUNTY.

S QUINN
Special weather statement, Jun 12, 6:55 PM CDT, 3 hours 40 minutes before
SDZ010-011-012-130050-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
655 PM CDT SAT JUN 12 1993

...TORNADO WATCH FOR MUCH OF CENTRAL AND PART OF EASTERN SOUTH DAKOTA
UNTIL MIDNIGHT CDT..

AT 625 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN...HAIL AND STRONG
GUSTY WINDS WERE OVER PARTS OF CENTRAL AND NORTH CENTRAL SOUTH DAKOTA.
THE STORMS WERE LOCATED 25 MILES NORTHWEST OF PIERRE AND 20 MILES NORTH
OF MOBRIDGE.

PEOPLE IN CENTRAL SOUTH DAKOTA AND NORTH CENTRAL SOUTH DAKOTA SHOULD
TAKE COVER WHEN THESE STORMS APPROACH.

MOVEMENT OF THESE STORMS WAS TO NORTHEAST AT 30 MILES AN HOUR.

MOHR
Special weather statement, Jun 12, 6:57 PM CDT, 3 hours 38 minutes before
SDZ010-011-012-130050-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
655 PM CDT SAT JUN 12 1993

...TORNADO WATCH FOR MUCH OF CENTRAL AND PART OF EASTERN SOUTH DAKOTA
UNTIL MIDNIGHT CDT..

AT 625 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN...HAIL AND STRONG
GUSTY WINDS WERE OVER PARTS OF CENTRAL AND NORTH CENTRAL SOUTH DAKOTA.
THE STORMS WERE LOCATED 25 MILES NORTHWEST OF PIERRE AND 20 MILES NORTH
OF MOBRIDGE.

PEOPLE IN CENTRAL SOUTH DAKOTA AND NORTH CENTRAL SOUTH DAKOTA SHOULD
TAKE COVER WHEN THESE STORMS APPROACH.

MOVEMENT OF THESE STORMS WAS TO NORTHEAST AT 30 MILES AN HOUR.

MOHR
Special weather statement, Jun 12, 7:18 PM CDT, 3 hours 17 minutes before
SDZ015-130200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
715 PM CDT SAT JUN 12 1993

...TORNADO WATCH NUMBER 424 IN EFFECT UNTIL 12 MIDNIGHT...

THUNDERSTORMS ARE DEVELOPING IN SOUTH CENTRAL SOUTH DAKOTA ALONG AND
AHEAD OF AN ACTIVE COLD FRONT. SEVERE WEATHER HAS ALREADY OCCURRED
IN CENTRAL SOUTH DAKOTA NEAR THE FRONT.

THE FRONT IS MOVING SLOW EAST. AS THE EVENING PROGRESSES THUNDERSTORMS
IN SOUTH CENTRAL SOUTH DAKOTA WILL LIKELY BECOME SEVERE. THE COUNTIES
MOST AT RISK OVER THE NEXT SEVERAL HOURS WILL BE TODD...MELLETTE...AND
TRIPP.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADO
DEVELOPMENT. PEOPLE IN THE TORNADO WATCH AREA ARE URGED TO KEEP A
CLOSE EYE ON THE WEATHER THIS EVENING.
KRIEHN
Special weather statement, Jun 12, 9:19 PM CDT, 1 hour 16 minutes before
SDZ015-019-130400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
915 PM CDT SAT JUN 12 1993

...TORNADO WATCH NUMBER 424 REMAINS IN EFFECT UNTIL 12 MIDNIGHT CDT
   FOR MOST OF CENTRAL SOUTH DAKOTA...

SEVERE THUNDERSTORMS...SOME PRODUCING TORNADOES...CONTINUE TO
MOVE SLOWLY EAST ACROSS CENTRAL SOUTH DAKOTA ALONG AN ACTIVE COLD
FRONT.  OVER THE PAST HOUR AN A HALF MOST OF THE SEVERE WEATHER HAS
OCCURRED IN THE PIERRE AREA.

IN SOUTH CENTRAL SOUTH DAKOTA THE THUNDERSTORMS EXTENDED FROM NORTHWEST
TRIPP COUNTY TO SOUTHEAST TODD COUNTY. UNTIL 10 PM THE COUNTIES MOST AT
RISK IN SOUTH CENTRAL SOUTH DAKOTA WILL BE TRIPP...BRULE...AND GREGORY.
BIGGER TOWNS IN THOSE COUNTIES INCLUDE WINNER AND CHAMBERLAIN.

A TORNADO WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR TORNADO
DEVELOPMENT. PEOPLE IN THE TORNADO WATCH AREA ARE URGED TO KEEP A
CLOSE EYE ON THE WEATHER TONIGHT. STAY TUNED TO LOCAL RADIO OR TV
OR YOUR NATIONAL WEATHER SERVICE WEATHER RADIO.

KRIEHN
Special weather statement, Jun 12, 9:55 PM CDT, 40 minutes before
SDZ010-011-012-130450-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
955 PM CDT SAT JUN 12 1993

...TORNADO WATCH FOR MUCH OF CENTRAL AND PART OF EASTERN SOUTH DAKOTA
UNTIL MIDNIGHT CDT..

AT 925 PM CDT...THUNDERSTORMS WITH VERY HEAVY RAIN...HAIL AND STRONG
GUSTY WINDS WERE OCCURRING OVER PARTS OF CENTRAL SOUTH DAKOTA.

THE STRONGEST THUNDERSTORM WAS OVER EASTERN LYMAN COUNTY OR ABOUT
10 MILES NORTHWEST OF CHAMBERLAIN.

MOVEMENT OF THESE STORMS WAS TO EAST AT 25 MILES AN HOUR.

MILLER

Nearby

Tornado Warnings in South Dakota, 1993Every tornado warning in 1993Tornadoes in 1993

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.