Alert archive / South Dakota / Tornado Warnings in 1992

Tornado Warning 31, NWS Sioux Falls, SD

August 9, 1992Moody County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Aug 9, 1992, 8:40 PM CDT for Moody County, South Dakota. It was in force for 50 min.

The area

The counties it named.

The facts

Issued
Aug 9, 1992, 8:40 PM CDT (01:40 UTC)
Expired
Aug 9, 1992, 9:30 PM CDT
In force
50 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Moody County, SD

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 1.7 hours before the alert went out and 168 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 00:00Z on 1992-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1762 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 00:00Z on 1992-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
1762 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
1484 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
223 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 100140
TORFSD
SDC101-100230-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
840 PM CDT SUN AUG 9 1992
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 930 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN EAST CENTRAL SOUTH DAKOTA
 
   ...ALL OF MOODY COUNTY
 
AT 839 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM ACROSS CENTRAL
MOODY COUNTY NEAR THE TOWN OF EGAN...OR ABOUT 25 MILES SOUTH OF
BROOKINGS. A FUNNEL CLOUD WAS ALSO REPORTED NEAR EGAN. RADAR
CONTINUES TO SHOW INTENSE DEVELOPMENT WITH THIS STORM. ANOTHER SEVERE
THUNDERSTORM WAS 5 MILES NORTHWEST OF FLANDREAU...AND SHOULD MOVE INTO
FLANDREAU BY 850 PM CDT. PEOPLE ACROSS MOODY COUNTY SHOULD TAKE COVER
IMMEDIATELY. STORMS WERE MOVING SOUTH AT 10 MILES AN HOUR.
 
A TORNADO WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST SOUTH DAKOTA...
NORTHWEST IOWA AND SOUTHWEST MINNESOTA.
 
THIS IS A DANGEROUS STORM.  MOVE QUICKLY TO UNDERGROUND SHELTER IF
AVAILABLE.  OTHERWISE...GO TO AN INTERIOR ROOM ON THE LOWEST FLOOR AN
AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES FOR A STURDY BUILDING.
 
MENTZER

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, Aug 9, 8:05 PM CDT, 35 minutes before
IAZ020-021-031-032-043-NEZ094>096-SDZ066-100200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
804 PM CDT SUN AUG 9 1992

...TORNADO WATCH FOR OBRIEN...PLYMOUTH...AND UNION COUNTIES UNTIL
2 AM MONDAY MORNING...

AT 800 PM CDT NO PRECIPITATION WAS LOCATED IN THE SIOUXLAND AREA.
THERE IS THE POSSIBILITY THAT SEVERE THUNDERSTORMS MAY DEVELOP IN THE
AREA THAT COULD PRODUCE LARGE HAIL...DAMAGING WINDS...AND TORNADOES.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE NEWS MEDIA FOR
UPDATES CONCERNING THE SEVERE WEATHER THREAT.

IRELAND

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 7:41 PM CDTTornado WarningFSDBrookings34 min
Aug 9, 8:02 PM CDTTornado WarningFSDMoody43 min
Aug 9, 8:50 PM CDTTornado WarningFSDLake25 min
Aug 9, 9:28 PM CDTSevere Thunderstorm WarningFSDMinnehaha47 min
Aug 9, 9:46 PM CDTSevere Thunderstorm WarningFSDMcCook, Minnehaha44 min
Aug 9, 10:20 PM CDTSevere Thunderstorm WarningFSDLincoln, Turner40 min
Aug 9, 10:38 PM CDTTornado WarningFSDTurner37 min
Aug 9, 11:21 PM CDTSevere Thunderstorm WarningFSDClay, Yankton54 min

Nearby

Tornado Warnings in South Dakota, 1992Every tornado warning in 1992Tornadoes 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.