Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 310, NWS Atlanta, GA

August 22, 1990Columbia County, Georgia; Edgefield County, South Carolina

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 22, 1990, 12:33 AM EDT for Columbia County, Georgia; Edgefield County, South Carolina. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Aug 22, 1990, 12:33 AM EDT (04:33 UTC)
Expired
Aug 22, 1990, 1:15 AM EDT
In force
42 min
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Columbia County, GA, Edgefield County, SC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 4.6 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, Athens Municipal, GA at 00:00Z on 1990-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2060 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, Athens Municipal, GA at 00:00Z on 1990-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939Sfc1 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
2060 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
1374 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAGS 220432
SVRAGS
GAC073-SCC037-220515-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUGUSTA GA
1233 AM EDT WED AUG 22 1990
 
THE NATIONAL WEATHER SERVICE IN AUGUSTA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL GEORGIA
 
   ...COLUMBIA COUNTY
 
 
IN WEST CENTRAL SOUTH CAROLINA
 
   ...EDGEFIELD COUNTY
 
AT 1230 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWS SEVERE
THUNDERSTORMS OVER NORTHERN EDGEFIELD COUNTY OF SOUTH CAROLINA AND
NORTHERN COLUMBIA COUNTY IN GEORGIA. THESE STORMS ARE DRIFTING SLOWLY
SOUTHEAST.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 l

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 8:01 PM EDTSevere Thunderstorm WarningFFCFranklin, Stephens59 min
Aug 21, 9:05 PM EDTSevere Thunderstorm WarningFFCHart55 min
Aug 22, 12:00 AM EDTSevere Thunderstorm WarningFFCOglethorpe60 min
Aug 22, 8:15 AM EDTSevere Thunderstorm WarningFFCBaldwin60 min
Aug 22, 5:04 PM EDTSevere Thunderstorm WarningFFCCherokee, Pickens56 min
Aug 22, 6:02 PM EDTSevere Thunderstorm WarningFFCForsyth28 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1990Severe Thunderstorm Warnings in South Carolina, 1990Every severe thunderstorm warning in 1990

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.