Alert archive / Georgia / Flash Flood Warnings in 1992

Flash Flood Warning 15, NWS Atlanta, GA

November 25, 1992Clayton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Nov 25, 1992, 10:42 AM EST for Clayton County, Georgia. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Nov 25, 1992, 10:42 AM EST (15:42 UTC)
Expired: Nov 25, 1992, 2:45 PM EST
In force: 4 hr
Issued by: NWS Atlanta, GA
Area: Whole counties

County Clayton County, GA

The nearest sounding before it

Athens Municipal, GA (KAHN), launched 12:00Z, 3.7 hours before the alert went out and 108 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 220 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 251555
FFWATL
GAC063-067-097-135-251945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATLANTA GA
1042 AM EST WED NOV 25 1992
 
THE NATIONAL WEATHER SERVICE IN ATLANTA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  200 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST GEORGIA
 
   ...CLAYTON COUNTY...COBB COUNTY...DOUGLAS COUNTY
   ...GWINNETT COUNTY
 
AT 1050 PM EST NATIOAL WEATHER SERVICE RADAR INDICATED A BAND OF
MODERATE RAIN WITH EMBEDDED THUNDERSTORMS WITH HEAVY RAIN. THE RAIN
CONTINUES TO MOVE NORTHEAST AT 45 MILES AN HOUR.
 
AT 1045 AM EST THE GAGE AT AUSTELL ON SWEETWATER CREEK WAS READING 9.1
FEET.  THE STAGE CONTINUES TO RISE AND SHOULD REACH THE FLOOD STAGE OF
TEN FEET WITHIN THE NEXT HOUR OR SO.  AT THE FLOOD STAGE OF TEN FEET
YARDS OF HOMES ALONG MT. VERNON ROAD BEGIN TO FLOOD.
 
ALSO AT 1045 AM EST SUWANEE CREEK IN NORTH GWINNETT WAS READING 7.2
FEET.  FLOOD STAGE AT SUWANEE CREEK IS 7 FEET.  BIG CREEK IN ALPHARETTA
WAS READING 7.4 FEET AND FLOOD STAGE IS 7 FEET.
 
IN EASTERN COBB COUNTY...SOAP CREEK AT THE ATLANTA COUNTRY CLUB HAD BEGUTO SPILL OVER ONTO THE GOLF COURSE.
 
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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 25, 6:12 AM EST	Severe Thunderstorm Warning	FFC	Morgan, Newton, Walton	48 min
Nov 25, 6:42 AM EST	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Oconee	33 min
Nov 25, 9:56 AM EST	Flash Flood Warning	FFC	DeKalb, Fulton	4 hr
Nov 25, 10:42 AM EST	Flash Flood Warning	FFC	Cobb, Douglas	4 hr
Nov 25, 10:42 AM EST	Flash Flood Warning	FFC	Gwinnett	4 hr
Nov 25, 2:15 PM EST	Flash Flood Warning	FFC	DeKalb, Fulton, Gwinnett	3 hr
Nov 25, 2:15 PM EST	Flash Flood Warning	FFC	Clayton	3 hr
Nov 25, 2:15 PM EST	Flash Flood Warning	FFC	Cobb, Douglas	3 hr

Nearby

Flash Flood Warnings in Georgia, 1992 Every 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.