Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 45, NWS Atlanta, GA

July 8, 2013Dawson County, Pickens County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 8, 2013, 9:49 PM EDT for Dawson County, Pickens 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
Jul 8, 2013, 9:49 PM EDT (01:49 UTC)
Expired
Jul 9, 2013, 3:45 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Dawson County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 128 km from the middle of the area, began a volume at 01:48 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.8 hours before the alert went out and 127 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 2013-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1827 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 00:00Z on 2013-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
1827 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1137 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

970 
WGUS52 KFFC 090149
FFWFFC
GAC085-227-090745-
/O.NEW.KFFC.FF.W.0045.130709T0149Z-130709T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
949 PM EDT MON JUL 8 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN PICKENS COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 345 AM EDT

* AT 943 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  2.5 TO 3 INCHES OF RAIN HAS FALLEN IN THE OVER THE WARNED          
  AREA. UP TO ANOTHER INCH OF RAIN IS POSSIBLE FROM THESE            
  STORMS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FAUSETT
  LAKE AND SEQUOYAH LAKE.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3454 8438 3457 8432 3455 8426 3441 8422
      3439 8436

$$
1 follow-up statement
272 
WGUS72 KFFC 090340
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1140 PM EDT MON JUL 8 2013

GAC085-227-090745-
/O.CON.KFFC.FF.W.0045.000000T0000Z-130709T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PICKENS GA-DAWSON GA-
1140 PM EDT MON JUL 8 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM EDT FOR
NORTHWESTERN DAWSON AND EASTERN PICKENS COUNTIES...

AT 1132 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT 4 TO 5 INCHES HAD FALLEN OVER THE WARNED AREA.  NO ADDITIONAL 
RAIN IS EXPECTED AT THIS TIME.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FAUSETT LAKE
AND SEQUOYAH LAKE

AT 1130 PM EDT ROADS WERE REPORTED COVERED WITH WATER AND SEVERAL 
DRIVEWAYS WERE WASHED OUT.  DESPITE THE FACT THAT THE RAIN HAS 
STOPPED...THE THREAT FOR FLASH FLOODING REMAINS IN RURAL 
AREAS OF THE WARNED AREA.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3454 8438 3457 8432 3455 8426 3441 8422
      3439 8436

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 8:03 PM EDTSpecial Weather StatementFFCLaurens42 min
Jul 8, 8:42 PM EDTSpecial Weather StatementFFCForsyth78 min
Jul 8, 8:46 PM EDTSpecial Weather StatementFFCHall59 min
Jul 8, 8:59 PM EDTFlash Flood WarningFFCForsyth, Hall6 hr
Jul 8, 9:42 PM EDTSpecial Weather StatementFFCPickens48 min
Jul 8, 11:18 PM EDTRiver Flood WarningFFCGordon, Murray, Whitfield31 hr
Jul 9, 12:59 AM EDTSpecial Weather StatementFFCMadison31 min
Jul 9, 1:29 AM EDTSpecial Weather StatementFFCMadison31 min
Jul 9, 5:32 PM EDTFlash Flood WarningFFCCarroll3 hr
Jul 9, 5:44 PM EDTSpecial Weather StatementFFCHall46 min
Jul 9, 7:55 PM EDTSpecial Weather StatementFFCSpalding35 min

Nearby

Flash Flood Warnings in Georgia, 2013Every flash flood warning in 2013

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.