Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 31, NWS Atlanta, GA

July 11, 2005Cobb County, Fayette County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 11, 2005, 7:25 AM EDT for Cobb County, Fayette County, Georgia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 11, 2005, 7:25 AM EDT (11:25 UTC)
Expired
Jul 11, 2005, 10:30 AM EDT
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Cobb County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 35 km from the middle of the area, began a volume at 11:27 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, 11.4 hours before the alert went out and 34 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 2005-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 joules per kilogram.LCLLFCEL10008507005003002001001 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 2005-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 275 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
82 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
563 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
275 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS52 KFFC 111127
FFWFFC
GAC067-113-111430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
725 AM EDT MON JUL 11 2005

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COBB COUNTY IN NORTH CENTRAL GEORGIA
  FAYETTE COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 1030 AM EDT

* AT 715 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM HEAVY RAIN SHOWERS FROM MARIETTA THROUGH
  PEACHTREE CITY TO WOODBURY...MOVING NORTH AT 40 MPH. ADDITIONAL
  RAINFALL OF 1 TO 2 INCHES CAN BE EXPECTED WITH THESE SHOWERS.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WHITEWATER...VININGS...SANDY CREEK...MARIETTA...MABLETON...
  KENWOOD...KENNESAW...FAYETTEVILLE...AUSTELL AND ACWORTH.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...SUCH AS MUD CREEK AND NOSES CREEK IN COBB
COUNTY...AND FLAT CREEK AND LINE CREEK IN FAYETTE COUNTY. 

ADDITIONALLY...HIGHWAYS AND UNDERPASSES...COUNTRY ROADS AND 
FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING 
AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 3329 8449 3336 8456 3351 8459 3356 8451
      3377 8458 3385 8467 3408 8471 3407 8442
      3384 8445 3375 8458 3355 8451 3355 8444
      3351 8441 3328 8442

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

$$

KDF

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 2:47 AM EDTFlash Flood WarningFFCDeKalb, Fulton118 min
Jul 11, 3:02 AM EDTFlash Flood WarningFFCClayton, Henry88 min
Jul 11, 3:22 AM EDTFlash Flood WarningFFCCobb113 min
Jul 11, 5:19 AM EDTFlash Flood WarningFFCCoweta3 hr
Jul 11, 5:46 AM EDTFlash Flood WarningFFCDouglas, Fulton4 hr

Nearby

Flash Flood Warnings in Georgia, 2005Every flash flood warning in 2005

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.