Alert archive / Georgia / Flash Flood Warnings in 2004

Flash Flood Warning 34, NWS Atlanta, GA

September 16, 2004DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 16, 2004, 10:24 PM EDT for DeKalb County, Fulton County, Georgia. It was in force for 6 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, 10:24 PM EDT (02:24 UTC)
Expired
Sep 17, 2004, 4:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Counties, with a storm outline in the text

Counties DeKalb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 60 km from the middle of the area, began a volume at 02:25 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, 2.4 hours before the alert went out and 236 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°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 170236
FFWATL
GAC089-121-170800-
                            
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1024 PM EDT THU SEP 16 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS UPDATED THE

* FLASH FLOOD WARNING FOR NANCY CREEK IN...
  FULTON COUNTY IN NORTH CENTRAL GEORGIA
  DEKALB COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 4 AM EDT

* FOR THE NANCY CREEK NEAR ATLANTA...
  MAJOR TO NEAR RECORD FLOODING IS FORECAST.
  THE LATEST STAGE WAS 14.4 FEET AT 10 PM THURSDAY.
  FLOOD STAGE IS 11.0 FEET.
  THE FORECAST FOR THE NANCY CREEK NEAR ATLANTA...
      THE CREEK WILL CREST NEAR 15 FEET AT MIDNIGHT
      THE RECORD FLOOD IS 15.5 FEET DECEMBER 1...1973
      THE CREEK WILL FALL BELOW FLOOD STAGE BY SUNRISE.

THIS IS A VERY DANGEROUS FLOOD EVENT. IF YOU ARE STILL NEAR A
CREEK...YOU SHOULD SEEK HIGHER GROUND.

ADDITIONALLY...ALL CREEKS IN THE METRO AREA WILL REMAIN IN FLOOD
TONIGHT.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY. 
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. 
TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES...INCLUDING 
SPORT UTILITY VEHICLES AND PICKUPS. VEHICLES CAUGHT IN RISING WATER 
SHOULD BE ABANDONED QUICKLY. MOVE TO HIGH GROUND.

A FLASH FLOOD WARNING MEANS THAT SIGNIFICANT FLOODING OF STREAMS...
CREEKS...AND ROADS IS EXPECTED. THIS MAY CAUSE SOME MODERATE TO MAJOR
INCONVENIENCES TO THE PUBLIC...AND PROPERTY DAMAGE OR THREAT TO LIFE 
IS ELEVATED.

YOU CAN REPORT SERIOUS FLOODING TO THE NATIONAL WEATHER SERVICE BY 
CALLING TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

LAT...LON 3386 8446 3383 8442 3391 8425 3395 8429


$$

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, 8:40 PM EDTFlash Flood WarningFFCClayton5 hr
Sep 16, 9:10 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 16, 9:35 PM EDTFlash Flood WarningFFCCobb5 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.