Alert archive / Georgia / Flash Flood Warnings in 1992

Flash Flood Warning 20, NWS Atlanta, GA

December 16, 1992Clayton County, DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Dec 16, 1992, 10:11 PM EST for Clayton County, DeKalb County, Fulton County, Georgia. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Dec 16, 1992, 10:11 PM EST (03:11 UTC)
Expired
Dec 17, 1992, 3:15 AM EST
In force
5 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Clayton County, GA, DeKalb County, GA, Fulton County, GA

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 00:00Z, 3.2 hours before the alert went out and 101 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 1992-12-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1992-12-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 399 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
534 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
399 m²/s²
0-3 km storm-relative helicity
383 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 KATL 170314
FFWATL
GAC063-089-121-170815-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATLANTA GA
1011 PM EST WED DEC 16 1992
 
THE NATIONAL WEATHER SERVICE IN ATLANTA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  315 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...CLAYTON COUNTY...DEKALB COUNTY...FULTON COUNTY
 
HEAVY RAIN DURING THE EVENING HAS PRODUCED SHARP RISES IN STREAMS AND
DRAINAGE DITCHES IN THE METROPOLITAN AREA. RAINFALL TOTALS FOR THE DAY
HAVE REACHED 2 TO 3 INCHES AT 10 PM WITH MODERATE TO HEAVY RAIN
CONTINUING OVER MUCH OF THE METROPOLITAN AREA. FLOODING HAS BEGUN
IN PORTIONS OF FULTON...DEKALB AND CLAYTON CLOUNTIES.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
 
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 FLOOD8 WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 4:20 AM ESTFlash Flood WarningFFCHabersham55 min
Dec 17, 7:37 AM ESTFlash Flood WarningFFCClayton, DeKalb, Fulton3 hr
Dec 17, 7:37 AM ESTFlash Flood WarningFFCCobb3 hr

Nearby

Flash Flood Warnings in Georgia, 1992Every flash flood warning in 1992

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.