Alert archive / Georgia / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 70, NWS Atlanta, GA

April 9, 19914 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 9, 1991, 5:02 PM EDT for 4 counties in Georgia. It was in force for 58 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 9, 1991, 5:02 PM EDT (21:02 UTC)
Expired: Apr 9, 1991, 6:00 PM EDT
In force: 58 min
Issued by: NWS Atlanta, GA
Area: Whole counties

Counties Barrow County, GA, Jackson County, GA, Oconee County, GA, Walton County, GA

What was reported inside it

Time	Report	Where	Remark
Apr 9, 5:30 PM EDT	Thunderstorm Wind 0	Jackson, GA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 12:00Z, 9.0 hours before the alert went out and 29 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 83 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -119 m²/s²
0-3 km storm-relative helicity: -100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAHN 092102
SVRAHN
GAC013-157-219-297-092200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ATHENS GA
502 PM EDT TUE APR 9 1991
 
THE NATIONAL WEATHER SERVICE IN ATHENS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST GEORGIA
 
   ...BARROW COUNTY...JACKSON COUNTY...OCONEE COUNTY
   ...NORTHERN WALTON COUNTY
 
AT 455 PM EDT THE ATHENS RADAR INDICATED POSSIBLE SEVERE THUNDERSTORMS
IN GWINNETT COUNTY GEORGIA MOVING EAST AT 40 MILES AN HOUR.
 
PERSONS IN AND NEAR THE CITIES OF MONROE...WINDER...JEFFERSON AND
SURROUNDING AREAS SHOULD KEEP ALERT FOR APPROACHING THUNDERSTORMS FOR
THE NEXT HOUR OR SO. BE PREPARED TO SEEK SHELTER INDOORS RAPIDLY.
 
KEEP TUNED TO THIS STATION FOR FURTHER UPDATES.
 
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, Apr 9, 3:06 PM EDT, 1 hour 56 minutes before

GAZ005-ALZ012-GAZ006-092100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBUS GA
305 PM EDT TUE APR 9 1991

...THUNDERSTORMS INCREASING OVER WEST CENTRAL GEORGIA AND EAST CENTRAL
ALABAMA...

AT 3 PM EDT WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS DEVELOPING
RAPIDLY OVER WEST CENTRAL GEORGIA AND EAST CENTRAL ALABAMA.  MOST OF
THE THUNDERSTORMS WERE JUST NORTH AND SOUTH OF COLUMBUS...ALSO IN
CHATTAHOOCHEE AND HARRIS COUNTIES.  THE STORMS WERE MOVING NORTHEAST
AT 20 MPH.

PEOPLE IN WEST CENTRAL GEORGIA AND EAST CENTRAL ALABAMA SHOULD BE
ALERT FOR THREATENING WEATHER THE NEXT FEW HOURS.  SOME OF THESE
THUNDERSTORMS WILL LIKELY CONTAIN SMALL HAIL...STRONG GUSTY WINDS
AND DANGEROUS CLOUD-TO-GROUND LIGHTNING.

PLEASE CONTINUE TO LISTEN TO NOAA WEATHER RADIO OR OTHER LOCAL
NEWS MEDIA FOR FURTHER UPDATES FROM THE NATIONAL WEATHER SERVICE.

Special weather statement, Apr 9, 3:11 PM EDT, 1 hour 51 minutes before

GAZ002-004-092215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
310 PM EDT TUE APR 9 1991

A SEVERE THUNDERSTORM WATCH NUMBER 108 IS IN EFFECT FOR UNION
COUNTY OF NORTHEAST GEORGIA UNTIL 900 PM EDT.

AT 305 PM EDT RADAR INDICATED A STRONG THUNDERSTORM JUST EAST OF
DWASONVILLE IN DAWSON COUNTY OF NORTHEAST GEORGIA. THIS STORM
WAS MOVING EAST AT 25 MILES AN HOUR AND WILL BE MOVING THROUGH
NORTHERN HALL...AND POSSIBLY HABERSHAM AND BANKS DURING THE NEXT
HOUR. PEOPLE IN OR NEAR THIS THUNDERSTORM CAN EXPECT GUSTY WINDS
...POSSIBLE SMALL HAIL...AND VERY HEAVY RAINFALL.

OTHER STRONG THUNDERSTORMS MAY DEVELOP OVER NORTHEAST GEORGIA
DURING THE REMAINDER OF THIS AFTERNOON AND EVENING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 2:41 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee	34 min
Apr 9, 3:26 PM EDT	Severe Thunderstorm Warning	FFC	Whitfield	49 min
Apr 9, 4:02 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer	43 min
Apr 9, 4:25 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Habersham, Hall	65 min
Apr 9, 6:09 PM EDT	Severe Thunderstorm Warning	FFC	Newton, Walton	66 min
Apr 9, 6:10 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Rockdale	35 min
Apr 9, 6:22 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	38 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1991 Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.