Alert archive / Georgia / Flash Flood Warnings in 1991

Flash Flood Warning 17, NWS Atlanta, GA

September 8, 19914 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 8, 1991, 4:36 AM EDT for 4 counties in Georgia. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Sep 8, 1991, 4:36 AM EDT (08:36 UTC)
Expired
Sep 8, 1991, 6:45 AM EDT
In force
2 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Bartow County, GA, Floyd County, GA, Gordon County, GA, Polk County, GA

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 8.6 hours before the alert went out and 163 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 1991-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2032 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 1991-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
2032 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1059 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KATL 080838
FFWATL
GAC015-115-129-233-081045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATLANTA  GA
436 AM EDT SUN SEP 8 1991
 
THE NATIONAL WEATHER SERVICE IN ATLANTA  HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  645 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...BARTOW COUNTY...FLOYD COUNTY...GORDON COUNTY...POLK COUNTY
 
AT 0435 AM EST...NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF
HEAVY RAINSHOWERS AND THUNDERSTORMS OVER NORTHWEST GEORGIA. THIS
HEAVY RAINFALL HAS PERSISTED THROUGH THE LAST FOUR HOURS. RAINFALL
REPORTS INDICATE THAT 3.90 INCHES OF RAIN HAS FALLEN AT RESACA AND
ADAIRSVILLE HAS MEASURED 1.83 INCHES DURING THE LAST FEW HOURS.
PRESENTLY...THE HEAVIEST OF THE STORMS WAS LOCATED BETWEEN CEDARTOWN
AND ROCKMART IN POLK COUNTY...AROUND CALHOUN IN GORDON COUNTY...NEAR
ADAIRSVILLE IN BARTOW COUNTY...AND NORTHEAST OF ROME IN FLOYD COUNTY.
 
THESE SHOWERS AND THUNDERSTORMS HAVE SHOWN VERY LITTLE MOVEMENT
ALTHOUGH THE AREA OF PRECIPITATION HAS CONTINUED TO SPREAD SLOWLY
SOUTHEAST.  DUE TO THE LACK OF MOVEMENT OF THESE STORMS...LOCALIZED
FLOODING IS A THREAT.  THE POTENTIAL FOR FLASH FLOODS EXISTS OVER
ROADS...NEAR CREEKS AND STREAMS...AND ANY OTHER LOW-LYING OR FLOOD-
PRONE AREA.  IF HEAVY RAIN PERSISTS IN YOUR AREA AND FLASH FLOODING
DEVELOPES...BE PREPARED TO PROTECT YOURSELF AND PROPERTY.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

What forecasters said that day

The local office's own words before this flash flood 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, Sep 8, 12:19 AM EDT, 4 hours 17 minutes before
GAZ001-GAZ003-GAZ005-080600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
1220 AM EDT SUN SEP 8 1991

ISOLATED SHOWERS AND THUNDERSTORMS THAT DEVELOPED OVER PARTS OF
NORTHWEST GEORGIA SATURDAY EVENING CONTINUE EARLY SUNDAY MORNING. AT
1215 AM EDT RADAR SHOWED LOCALLY HEAVY RAIN FALLING FROM STORMS
BETWEEN ROME AND CALHOUN...BETWEEN ROME AND CARTERSVILLE...AND
IN LAMAR COUNTY NEAR BARNESVILLE.

THESE SHOWERS AND STORMS WERE MOVING SOUTH AT ABOUT 10 MPH.
THIS SLOW MOVEMENT MAY RESULT IN SOME FLOODING OF ROADWAYS...LOW
LYING AREAS...AND FLOODPRONE AREAS. IF HEAVY RAIN FALLS AND PERSISTS
IN YOUR AREA...BE PREPARED FOR POSSIBLE FLOODING. MOTORISTS SHOULD
NOT ATTEMPT TO DRIVE T&HROUGH WATER OF UNKNOWN DEPTH ON ROADWAYS.
Special weather statement, Sep 8, 2:42 AM EDT, 1 hour 54 minutes before
GAZ001-GAZ003-GAZ005-080800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATLANTA  GA
240 AM EDT SUN SEP 8 1991

AT 235 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED LOCALLY HEAVY
RAINSHOWERS AND THUNDERSTORMS OVER NORTHWEST GEORGIA. THE STRONGEST
STORMS WERE LOCATED NEAR CEDARTOWN IN POLK COUNTY...OVER GORDON COUNTY
NEAR CALHOUN...AND OVER FLOYD COUNTY NORTHEAST OF ROME. THESE SHOWERS
AND STORMS WERE MOVING VERY SLOWLY SOUTHEAST.

DUE TO THE VERY SLOW MOVEMENT OF THESE SHOWERS AND STORMS...LOCALIZED
FLOODING IS A THREAT. THE POTENTIAL FOR FLASH FLOODS EXISTS OVER ROADS
AND OTHER LOW-LYING OR FLOODPRONE AREAS. IF HEAVY RAIN DEVELOPES AND
CONTINUES IN YOUR AREA...BE PREPARED FOR POSSIBLE FLOODING. MOTORISTS
SHOULD NOT DRIVE THROUGH STANDING WATER OR WATER OF UNKNOW DEPTH ON
ROADWAYS.

Nearby

Flash Flood Warnings in Georgia, 1991Every flash flood 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; the sounding from the Mesonet's radiosonde archive.