Alert archive / Georgia / Flash Flood Warnings in 2005

Flash Flood Warning 29, NWS Atlanta, GA

July 11, 2005Coweta County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 11, 2005, 5:19 AM EDT for Coweta 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 outline as issued.

The facts

Issued: Jul 11, 2005, 5:19 AM EDT (09:19 UTC)
Expired: Jul 11, 2005, 8:15 AM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Coweta County, GA

The radar

The Atlanta radar (KFFC), 18 km from the middle of the area, began a volume at 09:21 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, 9.3 hours before the alert went out and 24 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: 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 110921
FFWFFC
GAC077-111215-

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COWETA COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 815 AM EDT

* AT 515 AM EDT...NATIONAL WEATHER SERVICE PERSONNEL REPORTED 2.50 
  INCHES OF RAIN IN ONE HOUR OVER EASTERN COWETA COUNTY. RADAR 
  INDICATED HEAVY RAIN OVER MERIWETHER COUNTY WILL MOVE NORTH INTO 
  COWETA COUNTY.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO   
  SENOIA...SHARPSBURG...NEWNAN...GRANTVILLE AND CANONGATE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

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 3322 8485 3324 8452 3351 8463 3348 8492

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.

Issued	Product	Office	Counties	Lasted
Jul 11, 2:47 AM EDT	Flash Flood Warning	FFC	DeKalb, Fulton	118 min
Jul 11, 3:02 AM EDT	Flash Flood Warning	FFC	Clayton, Henry	88 min
Jul 11, 3:22 AM EDT	Flash Flood Warning	FFC	Cobb	113 min
Jul 11, 5:46 AM EDT	Flash Flood Warning	FFC	Douglas, Fulton	4 hr
Jul 11, 7:25 AM EDT	Flash Flood Warning	FFC	Cobb, Fayette	3 hr

Nearby

Flash Flood Warnings in Georgia, 2005 Every 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.