Alert archive / Georgia / Flash Flood Warnings in 2004

Flash Flood Warning 39, NWS Atlanta, GA

September 27, 2004DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 27, 2004, 9:40 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 27, 2004, 9:40 PM EDT (01:40 UTC)
Expired
Sep 28, 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 01:39 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.7 hours before the alert went out and 57 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, Peachtre/Fal Fld, GA at 00:00Z on 2004-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Peachtre/Fal Fld, GA at 00:00Z on 2004-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
498 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
3 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 280145
FFWATL
GAC089-121-280800-
                            
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
940 PM EDT MON SEP 27 2004

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS UPGRADED THE 
FLASH FLOOD WARNING TO MAJOR FLOODING...

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

* UNTIL 400 AM EDT

* NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 3 TO 4 INCHES
  OF RAIN HAS FALLEN OVER THE CITY OF ATLANTA SINCE 2 PM WITH
  AN ADDITIONAL INCH OF RAIN POSSIBLE THROUGH MIDNIGHT.

* FOR THE PEACHTREE CREEK NEAR ATLANTA...
  MAJOR FLOODING IS FORECAST.
  THE LATEST STAGE WAS ESTIMATED AT 20.5 FEET AT 930 PM MONDAY.   
  FLOOD STAGE IS 17 FEET.
  THE FORECAST FOR THE PEACHTREE CREEK NEAR ATLANTA...       
      THE CREEK WILL CREST BETWEEN 22 AND 23 FEET AROUND MIDNIGHT.
      THE CREEK WILL FALL BELOW FLOOD STAGE AROUND 4 AM TUESDAY.

AT 21 FEET...MAJOR AND SERIOUS FLOODING BEGINS.  WATER RISES TO THE 
UNDERSPOUTS OF THE NORTHSIDE DRIVE BRIDGE.  PEOPLE WILL NEED TO BE 
EVACUATED FROM PEACHTREE PARK APARTMENTS.  

IN ADDITION THIS FLASH FLOOD WARNING INCLUDES NANCY AND PROCTOR 
CREEKS.

FOR NANCY CREEK...THE CREEK WILL CREST NEAR 13 FEET AROUND MIDNIGHT. 
FLOOD STAGE IS 11 FEET. AT 13 FEET...SEVERAL HOMES BEGIN TO FLOOD 
ALONG RICKENBACKER WAY.

FOR PROCTOR CREEK...THE CREEK IS FORECAST TO CREST NEAR 13 FEET 
AROUND 10 PM. THIS WILL CAUSE FLOODING OF ROADS NEAR GROVE PARK AND 
HORTENSE PLACE NORTHWEST.

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 3393 8421 3382 8421 3378 8447 3384 8445


$$
1 follow-up statement
000 
WGUS72 KFFC 280348
FFSATL
GAC089-121-280800-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1142 PM EDT MON SEP 27 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 400 AM EDT FOR FULTON AND 
DEKALB COUNTIES...

THE HEAVY RAIN HAS ENDED ACROSS THE METRO ATLANTA AREA. RAINFALL 
TOTALS OF 3 TO 5 INCHES OCCURRED.

FOR THE PEACHTREE CREEK...THE CREEK APPEARS TO HAVE CREST JUST BELOW 
21 FEET.  THE FLOOD WATERS WILL SLOWLY RECEDE THE NEXT 2 TO 4 HOURS 
AND WILL FALL BELOW FLOOD STAGE BY 4 AM TUESDAY. THIS WAS THE SECOND 
MAJOR FLOOD EVENT IN JUST ABOUT A WEEK. THIS HAS NOT OCCURRED IN 
OBSERVED HISTORY

FOR THE NANCY CREEK...THE CREEK WILL CREST NEAR 13 FEET BETWEEN 
MIDNIGHT AND 1 AM EDT TUESDAY.  IT SHOULD FALL BELOW FLOOD STAGE 
BEFORE 4 AM AS WELL.

FOR PROCTOR CREEK...THE CREEK CRESTED NEAR 12 FEET AND HAS ALREADY 
FALLEN BELOW FLOOD STAGE.

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 3393 8421 3382 8421 3378 8447 3384 8445

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 27, 8:54 PM EDTFlash Flood WarningFFCDeKalb, Fulton6 hr
Sep 27, 10:17 PM EDTFlash Flood WarningFFCCobb4 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.