Alert archive / Georgia / Flash Flood Warnings in 2011

Flash Flood Warning 11, NWS Atlanta, GA

September 22, 2011Coweta County, Fayette County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 22, 2011, 4:30 PM EDT for Coweta County, Fayette County, Georgia. It was in force for 3 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 22, 2011, 4:30 PM EDT (20:30 UTC)
Expired: Sep 22, 2011, 7:45 PM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Coweta County, GA, Fayette County, GA

The radar

The Atlanta radar (KFFC), 8 km from the middle of the area, began a volume at 20:33 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.

What was reported inside it

Time	Report	Where	Remark
Sep 22, 5:15 PM EDT	FLASH FLOOD	1 Ne Peachtree City, GA	THE DEPUTY EMA DIRECTOR FOR FAYETTE COUNTY INDICATED PORTIONS OF THE TINSLEY MILL VILLAGE WERE FLOODED DUE TO CHERRY BRANCH COMING OUT OF ITS BANKS. THE FLOOD WATERS HAVE SURROUNDED TWO CONDOMINIUMS...BUT HAVE LEVELED OFF AND ARE HOLDING STEADY. SO FAR THE FLO
Sep 22, 5:15 PM EDT	FLASH FLOOD	3 Ese Peachtree City, GA	A DETENTION POND OVERFLOWED OFF OF CROSSTOWN ROAD AND CAUSED A BASEMENT TO FLOOD IN A HOME ON PRESTWICK LANE WITH 2 TO 3 FEET OF WATER.
Sep 22, 6:10 PM EDT	FLASH FLOOD	2 Ese Peachtree City, GA	A POND AT THE LUTHER GLASS PARK OFF SOUTH PEACHTREE PARKWAY OVERFLOWED AND HAS FLOODED PORTION OF THE GOLF CART PATH WITH AROUND 2 FEET OF WATER. THE WATER LEVEL WAS STILL RISING SLOWLY AND WILL LIKELY FLOOD MORE OF THE GOLF CART PATH AND SURROUNDING AREA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.5 hours before the alert went out and 3 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: 1248 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 682 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

744 
WGUS52 KFFC 222030
FFWFFC
GAC077-113-230230-
/O.NEW.KFFC.FF.W.0011.110922T2030Z-110923T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
430 PM EDT THU SEP 22 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 1030 PM EDT

* AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  POTENTIAL FLASH FLOODING DEVELOPING FROM TRAINING THUNDERSTORMS    
  AND HEAVY RAIN OVER THE WARNED AREA. RAINFALL AMOUNTS UP TO 2      
  INCHES HAS OCCURRED IN THE PAST HOUR IN PEACHTREE CITY. THE        
  THUNDERSTORMS WERE MOVING NORTH TO NORTHEAST AT 15 MPH. ADDITIONAL
  RAINFALL AMOUNTS OF 2 INCHES IS POSSIBLE BEFORE THE STORMS MOVE   
  OUT OF THE WARNED AREA BY 700 PM EDT.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO            
  FAYETTEVILLE...WOOLSEY AND PEACHTREE CITY. FLAT CREEK...WHITEWATER 
  CREEK AND LINE CREEK ARE EXPECTED TO FLOOD IN THE NEXT FEW HOURS.
  THIS WILL INCLUDE THE BRANCH OF FLAT CREEK AFFECTING THE TINSLEY   
  MILL VILLAGE IN PEACHTREE CITY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND UNDERPASSES.
ADDITIONALLY...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. MOVE TO HIGHER GROUND.

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

&&

LAT...LON 3347 8465 3348 8439 3345 8438 3343 8440
      3341 8439 3336 8440 3332 8438 3326 8444
      3328 8475

$$

16

2 follow-up statements

366 
WGUS72 KFFC 222232
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
632 PM EDT THU SEP 22 2011

GAC077-113-230230-
/O.CON.KFFC.FF.W.0011.000000T0000Z-110923T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COWETA GA-FAYETTE GA-
632 PM EDT THU SEP 22 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT FOR
FAYETTE AND EASTERN COWETA COUNTIES...

AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE LIGHT RAIN PASSING OVER THE WARNED AREA. RAINFALL AMOUNTS 
OF 2.5 TO 3 INCHES OCCURRED FROM SHARPSBURG TO PEACHTREE CITY LATE 
THIS AFTERNOON. 

THE DEPUTY EMA DIRECTOR FOR FAYETTE COUNTY INDICATED PORTIONS OF THE 
TINSLEY MILL VILLAGE WERE FLOODED DUE TO CHERRY BRANCH COMING OUT OF 
ITS BANKS. THE FLOOD WATERS HAVE SURROUNDED TWO CONDOMINIUMS...BUT 
HAVE LEVELED OFF AND ARE HOLDING STEADY. SO FAR THE FLOOD WATER HAS 
NOT ENTERED THE HOMES AND NO EVACUATIONS HAVE OCCURRED.

ALSO IN PEACHTREE CITY A DETENTION POND OVERFLOWED OFF OF CROSSTOWN 
ROAD AND CAUSED A BASEMENT TO FLOOD IN A HOME ON PRESTWICK LANE WITH 
2 TO 3 FEET OF WATER.

A POND AT THE LUTHER GLASS PARK OFF SOUTH PEACHTREE PARKWAY IN 
PEACHTREE CITY HAS OVERFLOWED AND HAD FLOODED PORTIONS OF THE GOLF 
CART PATH WITH AROUND 2 FEET OF WATER.  THE WATER WAS STILL RISING 
SLOWLY AT THIS TIME.

THE RAIN CONTINUES TO DIMINISH OVER THE WARNED AREA SO IT IS LIKELY 
THE WARNING WILL BE CANCELLED IN ANOTHER HOUR OR TWO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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. MOVE TO HIGHER GROUND.

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

&&

LAT...LON 3347 8465 3348 8439 3345 8438 3343 8440
      3341 8439 3336 8440 3332 8438 3326 8444
      3328 8475

$$

16

556 
WGUS72 KFFC 222345
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
745 PM EDT THU SEP 22 2011

GAC077-113-230015-
/O.CAN.KFFC.FF.W.0011.000000T0000Z-110923T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COWETA GA-FAYETTE GA-
745 PM EDT THU SEP 22 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR FAYETTE AND EASTERN
COWETA COUNTIES...

AT 730 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED LIGHT 
RAIN HAD EXITED THE WARNED AREA. TOTAL RAINFALL AMOUNTS OF 2.5 TO 3 
INCHES OCCURRED FROM SHARPSBURG TO FAYETTEVILLE BETWEEN 300 AND 600 
PM EDT TODAY. 

NO ADDITIONAL REPORTS OF FLOODING HAVE BEEN RECEIVED FROM THE COWETA 
AND FAYETTE COUNTY EMERGENCY MANAGEMENT OFFICIALS. THE PREVIOUS 
FLOODING REPORTED IN PEACHTREE CITY HAS BEEN RECEDING DURING THE 
PAST HOUR.

DUE TO THIS LATEST INFORMATION THE FLASH FLOOD WARNING WILL BE 
CANCELLED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU WOULD LIKE TO REPORT SIGNIFICANT FLOODING THAT OCCURRED 
EARLIER TODAY...CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT
1 8 6 6...7 6 3...4 4 6 6.

LAT...LON 3347 8465 3348 8439 3345 8438 3343 8440
      3341 8439 3336 8440 3332 8438 3326 8444
      3328 8475

$$

16

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 22, 2:28 AM EDT	Special Weather Statement	FFC	Banks	62 min
Sep 22, 2:58 AM EDT	Special Weather Statement	FFC	Coweta	47 min
Sep 22, 6:42 AM EDT	Special Weather Statement	FFC	Cherokee	63 min
Sep 22, 7:15 AM EDT	Special Weather Statement	FFC	Gilmer	45 min
Sep 22, 1:33 PM EDT	Special Weather Statement	FFC	Laurens	42 min
Sep 22, 2:01 PM EDT	Special Weather Statement	FFC	Haralson	44 min
Sep 22, 2:10 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	35 min
Sep 22, 2:32 PM EDT	Special Weather Statement	FFC	Montgomery, Treutlen	43 min
Sep 22, 2:49 PM EDT	Special Weather Statement	FFC	Cherokee	26 min
Sep 22, 2:54 PM EDT	Special Weather Statement	FFC	Floyd	36 min
Sep 22, 3:01 PM EDT	Special Weather Statement	FFC	Fayette	29 min
Sep 22, 3:09 PM EDT	Special Weather Statement	FFC	Dawson	36 min
Sep 22, 3:11 PM EDT	Special Weather Statement	FFC	Toombs	49 min
Sep 22, 3:21 PM EDT	Special Weather Statement	FFC	Whitfield	39 min
Sep 22, 3:39 PM EDT	Special Weather Statement	FFC	Coweta, Fayette	66 min
Sep 22, 5:23 PM EDT	Special Weather Statement	FFC	Cherokee, Pickens	37 min
Sep 22, 5:38 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin	37 min
Sep 22, 6:07 PM EDT	Special Weather Statement	FFC	Troup	38 min
Sep 22, 6:18 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	42 min
Sep 22, 6:39 PM EDT	Flash Flood Warning	FFC	Cherokee, Dawson, Forsyth	4 hr
Sep 22, 6:46 PM EDT	Special Weather Statement	FFC	Troup	44 min
Sep 22, 7:06 PM EDT	Special Weather Statement	FFC	Henry	24 min
Sep 22, 7:17 PM EDT	Special Weather Statement	FFC	Lumpkin	43 min
Sep 22, 7:35 PM EDT	Special Weather Statement	FFC	Hall	25 min
Sep 22, 7:42 PM EDT	Special Weather Statement	FFC	Troup	63 min

Nearby

Flash Flood Warnings in Georgia, 2011 Every flash flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.