Alert archive / South Dakota / Tornado Warnings in 1993

Tornado Warning 2, NWS Sioux Falls, SD

May 7, 1993Lincoln County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at May 7, 1993, 3:01 PM CDT for Lincoln County, South Dakota. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
May 7, 1993, 3:01 PM CDT (20:01 UTC)
Expired
May 7, 1993, 3:30 PM CDT
In force
29 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Lincoln County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 220 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 12:00Z on 1993-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 115 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 12:00Z on 1993-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 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
115 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
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 072009 RRA
TORFSD
SDC083-072030-
 
BULLETIN - EBS ACTIVATION REQUESTED...RETRANSMISSION...
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
301 PM CDT FRI MAY 7 1993
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST SOUTH DAKOTA
 
   ...LINCOLN COUNTY
 
AT 255 PM CDT RADAR INDICATED A TORNADO 3 MILES SOUTH OF BERESFORD
MOVING TO THE NORTH AT 25 MILES AN HOUR. THE TORNADO SHOULD BE IN
BERESFORD BY 305 PM CDT. PERSONS IN BERESFORD SHOULD MOVE IMMEDIATELY TO
A PLACE OF SAFETY. PERSONS TRAVELING ALONG I29 NEAR BERESFORD IN
SOUTHEAST SOUTH DAKOTA SHOULD TAKE COVER. A FUNNEL CLOUD WAS REPORTED IN
HTHE SAME LOCATION AS THE RADAR INDICATED THE TORNADO. PERSONS IN
WORTHING CAN EXPECT THE TORNADO TO REACH THEM BY 315 PM CDT.
 
 
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 5:00 PM CDTTornado WarningFSDDavison, Hanson, Hutchinson60 min
May 7, 6:33 PM CDTTornado WarningFSDLake, McCook42 min

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.