Alert archive / Georgia / Flash Flood Warnings in 2009

Flash Flood Warning 40, NWS Atlanta, GA

September 21, 200911 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Sep 21, 2009, 8:40 PM EDT for 11 counties in 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
Sep 21, 2009, 8:40 PM EDT (00:40 UTC)
Expired
Sep 22, 2009, 2:30 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, GA, Greene County, GA, Hancock County, GA, Jasper County, GA, Jones County, GA, Morgan County, GA, Oglethorpe County, GA, Putnam County, GA, Taliaferro County, GA, Warren County, GA, Wilkes County, GA

The radar

The Robins AFB radar (KJGX), 111 km from the middle of the area, began a volume at 00:42 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, 0.7 hours before the alert went out and 152 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 2009-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 835 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2009-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939Sfc1 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
835 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS52 KFFC 220040
FFWFFC
GAC009-133-141-159-169-211-221-237-265-301-317-220630-
/O.NEW.KFFC.FF.W.0040.090922T0040Z-090922T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
840 PM EDT MON SEP 21 2009

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN BALDWIN COUNTY IN CENTRAL GEORGIA
  JASPER COUNTY IN CENTRAL GEORGIA
  NORTHERN JONES COUNTY IN CENTRAL GEORGIA
  PUTNAM COUNTY IN CENTRAL GEORGIA
  GREENE COUNTY IN EAST CENTRAL GEORGIA
  HANCOCK COUNTY IN EAST CENTRAL GEORGIA
  TALIAFERRO COUNTY IN EAST CENTRAL GEORGIA
  NORTHWESTERN WARREN COUNTY IN EAST CENTRAL GEORGIA
  WILKES COUNTY IN EAST CENTRAL GEORGIA
  SOUTHEASTERN MORGAN COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN OGLETHORPE COUNTY IN NORTHEAST GEORGIA

* UNTIL 230 AM EDT

* AT 838 PM EDT...NATIONAL WEATHER SERVICE INDICATED A LINE OF 
  INTENSE THUNDERSTORMS CONTAINING VERY HEAVY RAIN FROM WEST OF   
  WASHINGTON TO CRAWFORDVILLE TO NEAR GRAY. WIDESPREAD MODERATE TO 
  HEAVY RAINFALL WAS ALSO LOCATED BEHIND THE LINE OF STORMS. UP TO 
  3 INCHES OF RAIN HAS FALLEN IN THIS AREA AND AN ADDITIONAL 
  1 TO 2 INCHES CAN BE EXPECTED THROUGH MIDNIGHT. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MONTICELLO
  ....SPARTA...EATONTON...TIGNALL...RAYLE...WASHINGTON...SHARON...
  CRAWFORDVILLE AND MILLEDGEVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3364 8259 3361 8264 3350 8260 3326 8288
      3301 8325 3296 8370 3332 8377 3365 8334
      3341 8310 3402 8295 3398 8281 3399 8265
      3388 8260 3387 8257 3378 8257 3366 8248

$$
1 follow-up statement
000 
WGUS72 KFFC 220224
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1024 PM EDT MON SEP 21 2009

GAC009-133-141-159-169-211-221-237-265-301-317-220630-
/O.CON.KFFC.FF.W.0040.000000T0000Z-090922T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JONES GA-BALDWIN GA-HANCOCK GA-PUTNAM GA-JASPER GA-WARREN GA-
TALIAFERRO GA-GREENE GA-MORGAN GA-WILKES GA-OGLETHORPE GA-
1024 PM EDT MON SEP 21 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM EDT FOR
EASTERN OGLETHORPE...WILKES...SOUTHEASTERN MORGAN...GREENE...
TALIAFERRO...NORTHWESTERN WARREN...JASPER...PUTNAM...HANCOCK...
BALDWIN AND NORTHERN JONES COUNTIES...

AT 1022 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED MODERATE TO 
HEAVY RAIN CONTINUING ACROSS THE AREA...PARTICULARLY ACROSS 
BALDWIN...NORTHWESTERN WASHINGTON...HANCOCK AND WARREN COUNTIES. UP 
TO 2 INCHES MIDNIGHT. EVEN AFTER THE RAIN ENDS...RUNOFF WILL 
CONTINUE TO FILL LARGER CREEKS AND STREAMS RESULTING IN ADDITIONAL 
FLOODING THROUGH THE EARLY MORNING HOURS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

IF YOU SEE SIGNIFICANT FLOODING...MOVE TO A SAFE PLACE THEN CALL THE 
NATIONAL WEATHER SERVICE TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6.

&&

LAT...LON 3364 8259 3361 8264 3350 8260 3326 8288
      3301 8325 3296 8370 3332 8377 3365 8334
      3341 8310 3402 8295 3398 8281 3399 8265
      3388 8260 3387 8257 3378 8257 3366 8248

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 9:07 PM EDTAreal Flood WarningFFCCarroll, Cherokee, Cobb, Coweta, DeKalb, Douglas and 6 more18 hr
Sep 21, 9:48 PM EDTAreal Flood WarningFFCCatoosa, Chattooga, Dade, Murray, Walker, Whitfield12 hr
Sep 21, 10:11 PM EDTFlash Flood WarningFFCBibb, Houston, Peach, Twiggs6 hr
Sep 21, 10:34 PM EDTRiver Flood WarningFFCBaldwin, Washington, Wilkinson18 hr
Sep 21, 11:32 PM EDTFlash Flood WarningFFCDooly, Houston, Macon, Peach5 hr
Sep 21, 11:56 PM EDTRiver Flood WarningFFCBartow, Floyd11 hr
Sep 22, 7:04 AM EDTRiver Flood WarningFFCDeKalb, Rockdale40 hr
Sep 22, 7:04 AM EDTRiver Flood WarningFFCNewton, Rockdale51 hr
Sep 22, 7:04 AM EDTRiver Flood WarningFFCWhitfield51 hr
Sep 22, 7:04 AM EDTRiver Flood WarningFFCPutnam8 hr
Sep 22, 9:26 AM EDTRiver Flood WarningFFCMurray, Whitfield15 hr
Sep 22, 9:26 AM EDTRiver Flood WarningFFCBarrow, Jackson14 hr
Sep 22, 9:43 AM EDTAreal Flood WarningFFCCatoosa, Chattooga, Dade, Murray, Walker, Whitfield24 hr
Sep 22, 12:05 PM EDTAreal Flood WarningFFCDooly6 hr
Sep 22, 1:52 PM EDTRiver Flood WarningFFCClayton, Fayette, Spalding9 hr
Sep 22, 2:29 PM EDTAreal Flood WarningFFCCarroll, Cherokee, Cobb, Coweta, DeKalb, Douglas and 6 more18 hr
Sep 22, 5:54 PM EDTRiver Flood WarningFFCDooly18 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.