Alert archive / Georgia / Flash Flood Warnings in 2004

Flash Flood Warning 31, NWS Atlanta, GA

September 16, 2004Clayton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 16, 2004, 8:40 PM EDT for Clayton County, Georgia. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 16, 2004, 8:40 PM EDT (00:40 UTC)
Expired
Sep 17, 2004, 1:45 AM EDT
In force
5 hr
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

County Clayton County, GA

The radar

The Atlanta radar (KFFC), 31 km from the middle of the area, began a volume at 00:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.7 hours before the alert went out and 228 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, Birmingham, AL at 00:00Z on 2004-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLEL10008507005003002001001 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, Birmingham, AL at 00:00Z on 2004-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
10 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
798 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
150 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 
WGUS52 KFFC 170042
FFWATL
GAC063-170545-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
840 PM EDT THU SEP 16 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAYTON COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 145 AM EDT

* AT 838 PM EDT...RAINFALL TOTALS OF 5 TO 7 INCHES HAVE OCCURED 
ACROSS THE AREA SINCE THIS AFTERNOON WITH AN ADDITIONAL INCH 
POSSIBLE.  HOWEVER...SIGNIFICANT RUNOFF INTO CREEKS AND STREAMS WILL 
CONTINUE INTO THE OVERNIGHT.  SEVERAL REPORTS OF PROPERTY FLOODING 
HAVE BEEN REPORTED ACROSS THE COUNTY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3351 8443 3344 8428 3365 8426 3366 8433
      3365 8438 3365 8442 3363 8446

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 8:37 PM EDTFlash Flood WarningFFCBartow, Chattooga, Dade, Floyd, Gordon, Walker5 hr
Sep 16, 9:10 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 16, 9:35 PM EDTFlash Flood WarningFFCCobb5 hr
Sep 16, 10:24 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 16, 11:15 PM EDTFlash Flood WarningFFCWhite6 hr
Sep 17, 3:21 AM EDTFlash Flood WarningFFCDeKalb, Fulton5 hr

Nearby

Flash Flood Warnings in Georgia, 2004Every flash flood warning in 2004

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; radar from the NEXRAD Level II archive.