Alert archive / Georgia / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 150, NWS Atlanta, GA

July 30, 1989Dade County, Walker County, Georgia; Hamilton County, Tennessee

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 30, 1989, 2:19 PM EDT for Dade County, Walker County, Georgia; Hamilton County, Tennessee. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Jul 30, 1989, 2:19 PM EDT (18:19 UTC)
Expired
Jul 30, 1989, 3:00 PM EDT
In force
41 min
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Dade County, GA, Walker County, GA, Hamilton County, TN

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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.3 hours before the alert went out and 177 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 12:00Z on 1989-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1750 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 12:00Z on 1989-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
1750 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
947 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
75 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 KCHA 301823
SVRCHA
GAC083-295-TNC065-301900-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
219 PM EDT SUN JUL 30 1989
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  300 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHWEST GEORGIA
          ...SOUTHERN DADE...WALKER
IN SOUTHEAST TENNESSEE
          ...SOUTHERN HAMILTON
 
AT 215PM EDT WEATHER RADAR INDICATED A SEVERE THUNDERSTORM OVER
SOUTHERN DADE COUNTY MOVING INTO WALKER COUNTY BOTH IN EXTREME
NORTHWEST GEORGIA.
 
THE THUNDERSTORM WAS MOVING TOWARD THE EASTNORTHEAST AT AROUND
15 MPH AND MAY MOVE INTO EXTREME SOUTHERN HAMILTON COUNTY OF
SOUTHEAST TENNESSEE SHORTLY AS WELL AS CATOOSA COUNTY
GEORGIA.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO A~N 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.

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, Jul 30, 12:49 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBUS GA
1245 PM EDT SUN JUL 30 1989

...THUNDERSTORMS DEVELOPING IN EAST CENTRAL ALABAMA AND WEST GEORGIA...

AT 1240 PM EDT COLUMBUS WEATHER RADAR INDICATED SHOWERS AND A FEW
THUNDERSTORMS DEVELOPING OVER WEST CENTRAL GEORGIA AND EAST CENTRAL
ALABAMA...INCLUDING THE COLUMBUS METROPOLITAN AREA.  THE LARGER
STORMS WERE NEAR WOODLAND GEORGIA AND FORT MITCHELL ALABAMA...JUST
SOUTH OF PHENIX CITY.  MOVEMENT WAS NORTHEAST AT 10 MPH.

PEOPLE IN THE PATH OF THESE THUNDERSTORMS SHOULD BE ALERT FOR
THREATENING WEATHER FOR THE NEXT HOUR OR SO...AND BE READY TO TAKE
SHELTER IF NECESSARY.  IN ADDITION TO HEAVY RAINFALL...THE STORMS WILL
LIKELY CONTAIN DANGEROUS CLOUD TO GROUND LIGHTNING...STRONG GUSTY WINDS
AND POSSIBLE SMALL HAIL.

PLEASE CONTINUE TO LISTEN TO NOAA WEATHER RADIO OR OTHER LOCAL
TELEVISION AND RADIO STATIONS FOR FURTHER STATEMENTS OR POSSIBLE
WARNINGS FROM THE NATIONAL WEATHER SERVICE.

Nearby

Severe Thunderstorm Warnings in Georgia, 1989Severe Thunderstorm Warnings in Tennessee, 1989Every severe thunderstorm warning in 1989

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.