Alert archive / Georgia / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Atlanta, GA

September 5, 2011Catoosa County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 5, 2011, 2:48 PM EDT for Catoosa County, Dade County, Walker County, Georgia. It was in force for 6 hr. 4 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 5, 2011, 2:48 PM EDT (18:48 UTC)
Expired
Sep 5, 2011, 8:45 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Catoosa County, GA, Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 82 km from the middle of the area, began a volume at 18:48 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

TimeReportWhereRemark
Sep 5, 3:30 PM EDTFLASH FLOODChickamauga, GASEVERAL CREEKS IN THE NORTH HALF OF WALKER COUNTY WERE BEGINNING TO OVERFLOW THEIR BANKS AND AFFECT FLOOD PRONE AREAS OF ROADS.
Sep 5, 3:30 PM EDTFLASH FLOODFort Oglethorpe, GATHE BLACK BRANCH WAS FLOODING THE PARKING LOT OF THE BATTLEWOOD APARTMENTS OFF FANT DRIVE. SOME EVACUATIONS WERE OCCURRING AS THE WATER LEVEL WAS REACHING THE STEPS OF SOME OF THE APARTMENTS.
Sep 5, 3:30 PM EDTFLASH FLOODTrenton, GASOME CREEKS WERE BEGINNING TO OVERFLOW THEIR BANKS AND CAUSE PORTIONS OF ROADS TO BE FLOODED. A HOUSE NEAR GEORGIA HIGHWAY 136 WAS SURROUNDED BY FLOOD WATERS FROM GULCH CREEK.
Sep 5, 5:03 PM EDTFLASH FLOOD2 W Trenton, GATRENTON FIRE DEPARTMENT RESCUED A FAMILY TRAPPED IN THEIR HOME BY FLOOD WATERS ON GA HWY 136.

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, 6.8 hours before the alert went out and 174 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 12:00Z on 2011-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 279 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 12:00Z on 2011-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
279 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
471 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
228 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

895 
WGUS52 KFFC 051848
FFWFFC
GAC047-083-295-060045-
/O.NEW.KFFC.FF.W.0010.110905T1848Z-110906T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
248 PM EDT MON SEP 5 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CATOOSA COUNTY IN NORTHWEST GEORGIA
  DADE COUNTY IN NORTHWEST GEORGIA
  WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 845 PM EDT

* AT 235 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  POTENTIAL FLASH FLOODING FROM HEAVY RAIN ASSOCIATED WITH TROPICAL  
  DEPRESSION LEE. RAINFALL AMOUNTS OF 3 TO 4 INCHES HAS OCCURRED
  OVER THE WARNED AREA SINCE 800 AM EDT THIS MORNING. AN ADDITIONAL  
  INCH OR TWO IS POSSIBLE BEFORE ENDING LATER TONIGHT. 

* NUMEROUS STREAMS AND CREEKS IN THE WARNED AREA HAVE THE            
  POTENTIAL TO OVERFLOW THEIR BANKS AND CAUSE FLOODING. LOCATIONS IN 
  THE WARNING INCLUDE BUT ARE NOT LIMITED TO RINGGOLD...FORT         
  OGLETHORPE...CHICKAMAUGA...LOOKOUT MOUNTAIN AND TRENTON.

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 3499 8498 3493 8500 3482 8509 3482 8513
      3471 8517 3459 8527 3459 8554 3499 8561

$$

16
2 follow-up statements
230 
WGUS72 KFFC 052029
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
429 PM EDT MON SEP 5 2011

GAC047-083-295-060045-
/O.CON.KFFC.FF.W.0010.000000T0000Z-110906T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WALKER GA-CATOOSA GA-DADE GA-
429 PM EDT MON SEP 5 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR
DADE...CATOOSA AND WALKER COUNTIES...

THE CATOOSA COUNTY EMERGENCY DIRECTOR REPORTS THE WATER FROM BLACK  
BRANCH WAS FLOODING THE PARKING LOT OF THE BATTLEWOOD APARTMENTS     
OFF FANT DRIVE IN FORT OGLETHORPE. SOME EVACUATIONS WERE OCCURRING   
AS THE WATER LEVEL WAS REACHING THE STEPS OF SOME OF THE            
APARTMENTS.

THE DADE COUNTY DEPUTY EMERGENCY DIRECTOR REPORTS ALL CREEKS WERE 
RISING RAPIDLY IN THE COUNTY AND SEVERAL OF THEM WERE BEGINNING TO 
FLOOD PORTIONS OF ROADS. BARRICADES ARE IN PLACE. A HOUSE NEAR 
GEORGIA HIGHWAY 136 WAS SURROUNDED BY FLOOD WATERS FROM GULCH CREEK.

THE WALKER COUNTY EMERGENCY DIRECTOR REPORTS SEVERAL FLOOD PRONE 
CREEKS WERE OVERFLOWING THEIR BANKS AND AFFECTING ROADS. BARRICADES 
ARE IN PLACE.

AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
SHOW LIGHT TO MODERATE RAIN OVER THE WARNED AREA. STORM TOTAL 
RAINFALL AMOUNTS OF 5 TO 8 INCHES HAVE OCCURRED OVER ALL OF DADE AND 
CATOOSA AND THE NORTH HALF OF WALKER COUNTIES SINCE 400 AM EDT THIS 
MORNING. ANOTHER INCH OR TWO IS POSSIBLE BEFORE THE RAIN ASSOCIATED 
WITH TROPICAL DEPRESSION LEE ENDS BY TUESDAY MORNING.

FLOODING IN THE WARNED AREA WILL CONTINUE THROUGH THE NIGHT.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
RINGGOLD...FORT OGLETHORPE...CHICKAMAUGA...LOOKOUT MOUNTAIN AND 
TRENTON.

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3499 8498 3493 8500 3482 8509 3482 8513
      3471 8517 3459 8527 3459 8554 3499 8561

$$

16
559 
WGUS72 KFFC 052258
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
658 PM EDT MON SEP 5 2011

GAC047-083-295-060045-
/O.CON.KFFC.FF.W.0010.000000T0000Z-110906T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WALKER GA-CATOOSA GA-DADE GA-
658 PM EDT MON SEP 5 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR
DADE...CATOOSA AND WALKER COUNTIES...

THE CATOOSA COUNTY EMERGENCY DIRECTOR REPORTS THE LOWER LEVEL OF 
SOME OF THE BATTLEWOOD APARTMENTS OFF FANT DRIVE IN FORT OGLETHORPE
HAVE BEEN FLOODED BY BLACK BRANCH. COUNTY OFFICIALS EVACUATED 33 
PEOPLE AND THE AMERICAN RED CROSS IS SETTING UP A SHELTER OVERNIGHT 
FOR 16 PEOPLE. THE FLOOD WATERS WILL BE SLOW TO RECEDE IN CATOOSA 
COUNTY AS THE WEST AND SOUTH CHICKAMAUGA CREEKS ARE EXPECTED TO RISE 
ABOVE FLOOD STAGE DURING THE NIGHT.

THE DADE COUNTY DEPUTY EMERGENCY DIRECTOR REPORTS MOST CREEKS ARE IN 
MINOR FLOOD...BUT ARE BEGINNING TO LEVEL OFF. PORTIONS OF ROADS NEAR 
THESE CREEKS ARE FLOODED AND BARRICADES REMAIN IN PLACE. AN 
ABANDONED HOUSE NEAR GEORGIA HIGHWAY 136 HAD A FLOODED CRAWL SPACE
FROM GULCH CREEK...BUT IT HAD LEVELED OFF.

THE WALKER COUNTY EMERGENCY DIRECTOR REPORTS SEVERAL FLOOD PRONE 
CREEKS WERE OVERFLOWING THEIR BANKS AND AFFECTING ROADS. THE WATER 
LEVEL APPEARS TO BE NO LONGER RISING...BUT BARRICADES REMAIN IN 
PLACE.

AT 645 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
SHOW LIGHT TO MODERATE RAIN OVER THE WARNED AREA. STORM TOTAL 
RAINFALL AMOUNTS OF 6 TO 9 INCHES HAVE OCCURRED OVER ALL OF DADE AND 
CATOOSA AND THE NORTH HALF OF WALKER COUNTIES SINCE 400 AM EDT THIS 
MORNING. ANOTHER INCH IS POSSIBLE BEFORE THE RAIN ASSOCIATED WITH 
TROPICAL DEPRESSION LEE ENDS BY TUESDAY MORNING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RINGGOLD...
FORT OGLETHORPE...CHICKAMAUGA...LOOKOUT MOUNTAIN AND TRENTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT MONDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3499 8498 3493 8500 3482 8509 3482 8513
      3471 8517 3459 8527 3459 8554 3499 8561

$$

16

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 12:21 PM EDTRiver Flood WarningFFCDade59 hr
Sep 5, 12:22 PM EDTTornado WarningFFCCarroll, Haralson, Paulding23 min
Sep 5, 12:39 PM EDTTornado WarningFFCTroup36 min
Sep 5, 1:14 PM EDTTornado WarningFFCHeard, Troup20 min
Sep 5, 1:44 PM EDTTornado WarningFFCCarroll, Coweta31 min
Sep 5, 1:55 PM EDTTornado WarningFFCDouglas35 min
Sep 5, 2:10 PM EDTTornado WarningFFCCarroll, Heard35 min
Sep 5, 2:19 PM EDTTornado WarningFFCHarris, Muscogee41 min
Sep 5, 2:27 PM EDTTornado WarningFFCCobb, Paulding48 min
Sep 5, 2:48 PM EDTTornado WarningFFCCherokee42 min
Sep 5, 2:56 PM EDTTornado WarningFFCHeard, Troup34 min
Sep 5, 2:58 PM EDTTornado WarningFFCHarris, Meriwether, Troup39 min
Sep 5, 3:00 PM EDTSpecial Weather StatementFFCBleckley, Pulaski30 min
Sep 5, 3:18 PM EDTTornado WarningFFCCarroll, Coweta, Heard42 min
Sep 5, 3:20 PM EDTSevere Thunderstorm WarningFFCBleckley, Houston, Pulaski, Twiggs25 min
Sep 5, 3:23 PM EDTTornado WarningFFCCoweta, Meriwether37 min
Sep 5, 3:26 PM EDTTornado WarningFFCBartow, Cherokee, Cobb, Paulding34 min
Sep 5, 3:27 PM EDTSpecial Weather StatementFFCTelfair, Wheeler33 min
Sep 5, 3:29 PM EDTTornado WarningFFCCherokee, Pickens31 min
Sep 5, 3:46 PM EDTTornado WarningFFCCherokee, Pickens44 min
Sep 5, 3:50 PM EDTTornado WarningFFCCoweta, Fayette40 min
Sep 5, 3:57 PM EDTTornado WarningFFCCarroll, Cobb, Douglas, Paulding48 min
Sep 5, 4:01 PM EDTTornado WarningFFCDawson, Fannin, Gilmer, Lumpkin, Pickens, Union44 min
Sep 5, 4:16 PM EDTTornado WarningFFCMorgan, Oconee29 min
Sep 5, 4:24 PM EDTTornado WarningFFCCarroll, Coweta, Douglas, Fulton36 min
Sep 5, 4:28 PM EDTTornado WarningFFCClayton, DeKalb, Fulton, Henry47 min
Sep 5, 4:34 PM EDTTornado WarningFFCJefferson20 min
Sep 5, 4:35 PM EDTTornado WarningFFCBartow, Cherokee, Cobb, Paulding40 min
Sep 5, 4:41 PM EDTTornado WarningFFCGreene, Morgan, Oconee49 min
Sep 5, 4:43 PM EDTTornado WarningFFCClarke, Oconee, Oglethorpe47 min
Sep 5, 4:49 PM EDTTornado WarningFFCCobb, Douglas, Fulton41 min
Sep 5, 4:57 PM EDTSpecial Weather StatementFFCCrawford48 min
Sep 5, 5:02 PM EDTTornado WarningFFCCrawford18 min
Sep 5, 5:16 PM EDTTornado WarningFFCCherokee, Dawson, Pickens44 min
Sep 5, 5:16 PM EDTTornado WarningFFCMadison44 min
Sep 5, 5:30 PM EDTSpecial Weather StatementFFCCobb30 min
Sep 5, 6:04 PM EDTSpecial Weather StatementFFCGwinnett, Hall41 min
Sep 5, 6:07 PM EDTTornado WarningFFCJasper, Jones, Putnam24 min
Sep 5, 6:57 PM EDTSpecial Weather StatementFFCTowns33 min
Sep 5, 7:21 PM EDTSpecial Weather StatementFFCCherokee39 min

Nearby

Flash Flood Warnings in Georgia, 2011Every 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.