Alert archive / South Dakota / Tornado Warnings in 1994

Tornado Warning 4, NWS Sioux Falls, SD

June 12, 1994Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 12, 1994, 5:40 PM CDT for Minnehaha County, South Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1994, 5:40 PM CDT (22:40 UTC)
Expired
Jun 12, 1994, 6:15 PM CDT
In force
35 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Minnehaha County, SD

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 10.7 hours before the alert went out and 187 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 1994-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1994-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1741 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFSD 122241
TORFSD
SDC099-122315-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
540 PM CDT SUN JUN 12 1994
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  615 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST SOUTH DAKOTA
 
   ...EASTERN MINNEHAHA COUNTY
 
AT 540 PM A TORNADO WAS REPORTED JUST SOUTH OF BRANDON ON HIGHWAY 38A
MOVING EAST AT 20 MPH.
 
DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. IF YOU ARE CAUGHT
IN THE PATH OF A TORNADO...LEAVE THE CAR AND GO TO A STRONG
BUILDING. IF NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR
LOW SPOT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 5:20 PM CDTSevere Thunderstorm WarningFSDMinnehaha40 min
Jun 12, 6:02 PM CDTSevere Thunderstorm WarningFSDMinnehaha57 min
Jun 12, 6:23 PM CDTSevere Thunderstorm WarningFSDLake36 min

Nearby

Tornado Warnings in South Dakota, 1994Every tornado warning in 1994Tornadoes in 1994

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.