Alert archive / Georgia / Flash Flood Warnings in 2009

Flash Flood Warning 49, NWS Atlanta, GA

October 12, 2009Banks County, Jackson County, Georgia

NWS Atlanta, GA issued this flash flood warning at Oct 12, 2009, 10:23 AM EDT for Banks County, Jackson 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
Oct 12, 2009, 10:23 AM EDT (14:23 UTC)
Expired
Oct 12, 2009, 4:15 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Banks County, GA, Jackson County, GA

The radar

The Greer radar (KGSP), 132 km from the middle of the area, began a volume at 14:27 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 12:00Z, 2.4 hours before the alert went out and 139 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 2009-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 2009-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 309 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
309 m²/s²
0-3 km storm-relative helicity
511 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.3

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 121423
FFWFFC
GAC011-157-122015-
/O.NEW.KFFC.FF.W.0049.091012T1423Z-091012T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1023 AM EDT MON OCT 12 2009

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN BANKS COUNTY IN NORTHEAST GEORGIA
  NORTHEASTERN JACKSON COUNTY IN NORTHEAST GEORGIA

* UNTIL 415 PM EDT

* AT 1010 AM EDT...THE EMERGENCY MANAGER IN BANKS COUNTY REPORTED    
  WEBBS CREEK WAS BEGINNING TO FLOOD WEBBS CREEK ROAD AND THE ROAD   
  WAS BEING CLOSED. ALSO CROOKED CREEK BETWEEN THE POTTERY MALL      
  AND TANGER OUTLET MALL WAS BEGINNING TO FLOOD A PORTION OF THE     
  PARKING LOTS NEAR THE INTERSECTION OF INTERSTATE 85 AND HIGHWAY    
  441. RAINFALL AMOUNTS NEAR 3 INCHES HAVE OCCURRED SINCE EARLY      
  THIS MORNING. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES CAN     
  BE EXPECTED THROUGH THE EARLY AFTERNOON.

* OTHER CREEKS IN THE WARNING INCLUDE GROVE CREEK.

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 3433 8339 3427 8333 3425 8333 3421 8336
      3421 8340 3416 8335 3412 8336 3423 8370
      3430 8362 3433 8365 3436 8363 3436 8338

$$
1 follow-up statement
000 
WGUS72 KFFC 121753
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
153 PM EDT MON OCT 12 2009

GAC011-157-122015-
/O.CON.KFFC.FF.W.0049.000000T0000Z-091012T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON GA-BANKS GA-
153 PM EDT MON OCT 12 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR
SOUTHERN BANKS AND NORTHEASTERN JACKSON COUNTIES...

BANKS COUNTY OFFICALS ADVICE NOT DRIVING UNLESS ABSOLUTELY 
NECESSARY. THEY ARE DEALING WITH NUMEROUS TRAFFIC ACCIDENTS DUE 
TO STANDING WATER ON ROADS.

AT 130 PM EDT...THE EMERGENCY MANAGER IN BANKS COUNTY CONTINUES TO 
REPORT WEBBS CREEK ROAD AND MARSHBURN DRIVE ARE CLOSED DUE TO 
FLOODING FROM WEBB CREEK. HEMBREE ROAD NEAR GROVE LEVEL ROAD IS 
CLOSED DUE TO FLOODING FROM HICKORY LEVEL CREEK. THE CROOKED CREEK 
NEAR THE COMMERCE OUTLET MALL WAS FLOODING PORTIONS OF THE PARKING 
LOT. THIS IS NEAR THE INTERSECTION OF INTERSTATE 85 AND HIGHWAY 441. 
GROVE CREEK IS EXPECTED TO HAVE MINOR FLOODING AS WELL. 

RAINFALL AMOUNTS OF 3 TO 4 INCHES HAVE OCCURRED SINCE EARLY THIS 
MORNING. ONLY SCATTERED LIGHT RAIN WILL PASS OVER THE WARNED AREA 
FOR THE REMAINDER OF THE AFTERNOON.

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. MOST FLOOD RELATED DEATHS OCCUR IN 
AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES... 
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING 
STREAM...EVEN A SMALL ONE...ON FOOT. 

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 3433 8339 3427 8333 3425 8333 3421 8336
      3421 8340 3416 8335 3412 8336 3423 8370
      3430 8362 3433 8365 3436 8363 3436 8338

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 12, 3:46 AM EDTFlood WatchFFCBaldwin, Banks, Barrow, Bartow, Butts, Carroll and 56 more18 hr
Oct 12, 8:34 AM EDTFlash Flood WarningFFCCherokee, Cobb, DeKalb, Douglas, Forsyth, Fulton and 2 more6 hr
Oct 12, 9:11 AM EDTRiver Flood WarningFFCForsyth, Fulton54 hr
Oct 12, 9:11 AM EDTRiver Flood WarningFFCGwinnett28 hr
Oct 12, 9:15 AM EDTSevere Thunderstorm WarningFFCCoweta, Heard, Meriwether, Troup45 min
Oct 12, 11:27 AM EDTRiver Flood WarningFFCClarke, Greene, Oconee5 days
Oct 12, 11:27 AM EDTRiver Flood WarningFFCCarroll, Coweta, Heard50 hr
Oct 12, 11:27 AM EDTRiver Flood WarningFFCCobb, Douglas49 hr
Oct 12, 11:27 AM EDTRiver Flood WarningFFCNewton, Rockdale50 hr
Oct 12, 11:27 AM EDTRiver Flood WarningFFCBibb, Houston, Jones, Monroe, Twiggs5 days
Oct 12, 11:27 AM EDTRiver Flood WarningFFCBarrow, Jackson48 hr
Oct 12, 11:38 AM EDTRiver Flood WarningFFCGwinnett, Walton12 hr
Oct 12, 11:52 AM EDTRiver Flood WarningFFCCobb, Fulton23 hr
Oct 12, 2:05 PM EDTTornado WarningFFCLaurens40 min
Oct 12, 2:27 PM EDTTornado WarningFFCEmanuel, Treutlen78 min
Oct 12, 2:32 PM EDTTornado WarningFFCBleckley, Dodge, Laurens43 min
Oct 12, 2:35 PM EDTAreal Flood WarningFFCCherokee, Cobb, DeKalb, Douglas, Forsyth, Fulton and 2 more9 hr
Oct 12, 4:08 PM EDTSevere Thunderstorm WarningFFCToombs41 min
Oct 12, 4:38 PM EDTRiver Flood WarningFFCDeKalb, Rockdale35 hr
Oct 12, 4:38 PM EDTRiver Flood WarningFFCElbert, Madison, Oglethorpe21 hr

Nearby

Flash Flood Warnings in Georgia, 2009Every flash flood warning in 2009

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.