Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 358, NWS Atlanta, GA

October 4, 1990Twiggs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Oct 4, 1990, 3:10 PM EDT for Twiggs County, Georgia. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Oct 4, 1990, 3:10 PM EDT (19:10 UTC)
Expired
Oct 4, 1990, 4:15 PM EDT
In force
65 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Twiggs County, GA

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 12:00Z, 7.2 hours before the alert went out and 143 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 12:00Z on 1990-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 96 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 12:00Z on 1990-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 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
96 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
200 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 KMCN 041909
SVRMCN
GAC289-042015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MACON GA
310 PM EDT THU OCT 4 1990
 
THE NATIONAL WEATHER SERVICE IN MACON GA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL GEORGIA
 
   ...TWIGGS COUNTY
 
AT 307 PM WEATHER RADAR IN MACON SHOWED A SEVERE THUNDERSTORM EAST OF
MACON IN TWIGGS COUNTY. THIS THUNDERSTORM WAS MOVING EAST AT 40 MPH.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, Oct 4, 11:33 AM EDT, 3 hours 37 minutes before
GAZ002-004-041625-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATHENS GA
1125 AM EDT THU OCT 4 1990

A LINE OF STRONG THUNDERSTORMS EXTENDS ACROSS NORTH GEORGIA
FROM NEAR CARROLLTON TO NORTHWEST OF ATLANTA AND TO CLAYTON.
THIS LINE OF STORMS WAS MOVING TO THE SOUTHEAST 30 MPH
ACCOMPANIED BY HEAVY RAIN...GUSTY WINDS AND FREQUENT LIGHTNING.

ELSEWHERE...SHOWERS AND A FEW THUNDERSTORMS WERE SCATTERED
OVER NORTH GEORGIA AND THE WESTERN CAROLINAS. MOVEMENT EAS
TO THE NORTHEAST 35 MPH.
Special weather statement, Oct 4, 12:07 PM EDT, 3 hours 3 minutes before
GAZ001-003-005-041730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA GA
1206 PM EDT THU OCT 4 1990

AT NOON...WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS WITH
VERY HEAVY RAIN IN NORTHWEST GEORGIA FROM NEAR CORNELIA TO NORTH
ATLANTA TO NEAR LAGRANGE. THE THUNDERSTORMS WERE MOVING SOUTHEAST
NEAR 30 MPH.

VERY HEAVY RAIN...GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING...AND
POSSIBLY SOME SMALL HAIL WILL OCCUR WITH THESE STORMS.

RESIDENTS OF NORTHWEST GEORGIA ARE URGED TO BE PREPARED TO QUICK ACTION
AND SEEK SAFE SHELTER AS THESE STORMS MOVE ACROSS THE AREA.
Special weather statement, Oct 4, 12:34 PM EDT, 2 hours 36 minutes before
GAZ002-004-041725-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATHENS GA
1225 PM EDT THU OCT 4 1990

A LINE OF STRONG THUNDERSTORMS CONTINUES TO MOVE SOUTHEAST
ACROSS NORTH GEORGIA. THIS LINE EXTENDS FROM LAGRANGE TO
ATLANTA AND TOCCOA AND THEN ACROSS THE WESTERN TIP OF SOUTH
CAROLINA TO ASHEVILLE NORTH CAROLINA.

THIS LINE OF THUNDERSTORMS WAS MOVING TO THE SOUTHEAST 30 MPH
ACCOMPANIED BY HEAVY RAIN...GUSTY WINDS AND FREQUENT LIGHTNING.

AT THE PRESENT RATE OF MOVEMENT...THE STORMS WILL BE IN THE
ATHENS AREA SHORTLY AFTER 100 PM THIS AFTERNOON.

ELSEWHERE...SHOWERS AND PATCHES OF RAIN WERE SCATTERED OVER
THE NORTHERN HALF OF GEORGIA AND THE WESTERN CAROLINAS.
MOVEMENT WAS TO THE NORTHEAST 35 MPH.
Special weather statement, Oct 4, 12:34 PM EDT, 2 hours 36 minutes before
GAZ005-ALZ011-041830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBUS GA
1232 PM EDT THU OCT 4 1990

AT 1225 PM EDT...WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS
MOVING THROUGH NORTHWEST GEORGIA SOUTHWEST THROUGH CENTRAL ALABAMA
FROM NEAR LAGRANGE GEORGIA TO NEAR MONTGOMERY ALABAMA.
THIS LINE IS MOVING SOUTHEAST AT 30 MILES AN HOUR AND WILL BE
EFFEECTING EAST CENTRAL ALABAMA AND WEST CENTRAL GEORGIA THIS
AFTERNOON.

VERY HEAVY RAIN...GUSTY WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING...AND POSSIBLY SOME SMALL HAIL WILL OCCUR WITH THESE STORMS.

RESIDENTS OF EAST CENTRAL ALABAMA AND WEST CENTRAL GEORGIA ARE URGED
TO BE PREPARED TO QUICK ACTION AND SEEK SAFE SHELTER AS THESE STORMS
MOVE ACROSS THE AREA.
Special weather statement, Oct 4, 1:24 PM EDT, 1 hour 46 minutes before
GAZ006-041830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MACON GA
123 PM EDT THU OCT 4 1990

...THUNDERSTORMS WITH VERY HEAVY RAIN APPROACHING CENTRAL GEORGIA...

AT 120 PM EDT WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS
...WITH VERY HEAVY RAIN...MOVING INTO CENTRAL GEORGIA.  THE MAIN AREA
OF THUNDERSTORMS WAS WEST OF A LINE THAT EXTENDED FROM NEAR TOCCOA IN
NORTHEAST GEORGIA...THROUGH ATHENS...THEN SOUTHWEST TO NEAR BUTLER.
SMALLER RAINSHOWERS HAVE DEVELOPED AHEAD OF THIS AREA.

BE ALERT FOR GUSTY WINDS AND HEAVY RAIN AS THESE THUNDERSTORMS MOVE
THROUGH CENTRAL GEORGIA DURING THE AFTERNOON HOURS. MOTORISTS SHOULD
ESPECIALLY BE CAREFUL OF HEAVY RAINFALL AND SLICK HIGHWAYS.  BOATERS
ON AREA LAKES SHOULD STAY INFORMED ON THE LOCATION AND MOVEMENT OF
THESE THUNDERSTORMS.
Special weather statement, Oct 4, 1:33 PM EDT, 1 hour 37 minutes before
GAZ002-004-041825-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATHENS GA
125 PM EDT THU OCT 4 1990

A LINE OF STRONG THUNDERSTORMS CONTINUES OVER NORTH GEORGIA
AND WESTERN SOUTH CAROLINA. THIS LINE EXTENDS FROM COLUMBUS
TO THE ATHENS AREA AND THEN TO NEAR ANDERSON AND GREENVILLE
SOUTH CAROLINA.

THIS LINE WAS MOVING TO THE SOUTHEAST 30 MPH ACCPMPANIED BY
BRIEF HEAVY RAIN...GUSTY WINDS AND FREQUENT LIGHTNING.

ELSEWHERE$...SHOWERS AND THUNDERSTORMS WERE SCATTERED OVER THE
NORTHERN HALF OF GEORGIA AND THE WESTERN CAROLINAS. MOVEMENT
WAS TO THE EAST 35 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 4, 2:59 PM EDTSevere Thunderstorm WarningFFCHouston46 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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.