Alert archive / Tennessee / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 88, NWS Atlanta, GA

May 18, 1993Van Buren County, Tennessee

NWS Atlanta, GA issued this severe thunderstorm warning at May 18, 1993, 7:31 PM CDT for Van Buren County, Tennessee. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
May 18, 1993, 7:31 PM CDT (00:31 UTC)
Expired
May 18, 1993, 8:00 PM CDT
In force
29 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Van Buren County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.5 hours before the alert went out and 114 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, Nashville Metro, TN at 00:00Z on 1993-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 820 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, Nashville Metro, TN at 00:00Z on 1993-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 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
820 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
899 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCHA 190030 RRA
SVRCHA
TNC175-190100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
831 PM EDT (731 PM CDT) TUE MAY 18 1993
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM EDT (800 PM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST TENNESSEE
 
   ...SOUTHERN VAN BUREN COUNTY
 
AT 825 PM EDT...725 PM CDT...THE CHATTANOOGA WEATHER RADAR INDICATED
A SEVERE THUNDERSTORM IN SOUTHERN VAN BUREN COUNTY IN SOUTHEAST
TENNESSEE.
 
THE STORM WILL LIKELY HAVE LARGE HAIL...STRONG WINDS...VERY HEAVY
RAINFALL AND DANGEROUS CLOUD TO GROUND LIGHTNING.
 
THE STORM IS MOVING TO THE EAST-NORTHEAST AROUND 40 MILES PER HOUR
AND RESIDENTS OF SOUTHERN VAN BUREN COUNTY SHOULD STAY ALERT FOR
SEVERE WEATHER UNTIL THIS STORM HAS PASSED.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 8:06 PM CDTSevere Thunderstorm WarningFFCRhea39 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 1993Every severe thunderstorm warning 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.