Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 75, NWS Atlanta, GA

August 8, 2013Dade County, Walker County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 8, 2013, 6:46 PM EDT for Dade County, Walker County, Georgia. It was in force for 4 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
Aug 8, 2013, 6:46 PM EDT (22:46 UTC)
Expired
Aug 8, 2013, 10:45 PM EDT
In force
4 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 22:49 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

Nashville Metro, TN (KBNA), launched 12:00Z, 10.8 hours before the alert went out and 180 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, Nashville Metro, TN at 12:00Z on 2013-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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, Nashville Metro, TN at 12:00Z on 2013-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
46 J/kg
Mixed-layer CIN
-276 J/kg
Mixed-layer LCL
1000 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
73 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.

387 
WGUS52 KFFC 082246
FFWFFC
GAC083-295-090245-
/O.NEW.KFFC.FF.W.0075.130808T2246Z-130809T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
646 PM EDT THU AUG 8 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 1045 PM EDT

* AT 640 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A THUNDERSTORM WITH VERY HEAVY RAIN OVER DADE COUNTY...MOVING EAST 
  AT 5 MPH. RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE WITH THIS
  STORM WHICH WILL BE ENOUGH TO PRODUCE FLASH FLOODING.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LOOKOUT MOUNTAIN...CHICKAMAUGA AND LAFAYETTE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. 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. TO ESCAPE RISING WATER MOVE UP 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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3499 8528 3494 8526 3486 8526 3485 8522
      3484 8521 3460 8516 3460 8554 3486 8559
      3495 8561 3498 8561

$$
1 follow-up statement
890 
WGUS72 KFFC 090247
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1047 PM EDT THU AUG 8 2013

GAC083-295-090257-
/O.EXP.KFFC.FF.W.0075.000000T0000Z-130809T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WALKER GA-DADE GA-
1047 PM EDT THU AUG 8 2013

...THE FLASH FLOOD WARNING HAS EXPIRED FOR DADE AND WALKER
COUNTIES...

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 3499 8528 3494 8526 3486 8526 3485 8522
      3484 8521 3460 8516 3460 8554 3486 8559
      3495 8561 3498 8561

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 8:25 PM EDTSpecial Weather StatementFFCHeard65 min
Aug 8, 12:10 PM EDTSpecial Weather StatementFFCClayton, DeKalb, Fayette35 min
Aug 8, 12:40 PM EDTSpecial Weather StatementFFCClayton, Cobb, Coweta, DeKalb, Fayette, Fulton and 1 more80 min
Aug 8, 12:44 PM EDTSpecial Weather StatementFFCUnion61 min
Aug 8, 1:00 PM EDTFlash Flood WarningFFCClayton, Cobb, Coweta, DeKalb, Fayette, Fulton and 3 more6 hr
Aug 8, 1:13 PM EDTSpecial Weather StatementFFCForsyth, Hall77 min
Aug 8, 1:23 PM EDTSpecial Weather StatementFFCMadison67 min
Aug 8, 1:56 PM EDTSpecial Weather StatementFFCCarroll, Douglas79 min
Aug 8, 2:13 PM EDTFlash Flood WarningFFCBanks, Hall, Jackson6 hr
Aug 8, 2:46 PM EDTSpecial Weather StatementFFCCobb, Paulding59 min
Aug 8, 3:38 PM EDTSpecial Weather StatementFFCHarris52 min
Aug 8, 3:42 PM EDTSpecial Weather StatementFFCBartow, Haralson, Paulding, Polk63 min
Aug 8, 3:51 PM EDTSpecial Weather StatementFFCCatoosa, Walker54 min
Aug 8, 4:39 PM EDTSpecial Weather StatementFFCFloyd, Gordon, Polk66 min
Aug 8, 4:41 PM EDTSpecial Weather StatementFFCDade64 min
Aug 8, 5:43 PM EDTSpecial Weather StatementFFCDade47 min
Aug 8, 6:13 PM EDTSpecial Weather StatementFFCCatoosa, Dade, Walker62 min
Aug 8, 7:02 PM EDTSpecial Weather StatementFFCChattooga58 min
Aug 8, 7:24 PM EDTSpecial Weather StatementFFCCatoosa, Murray, Whitfield66 min
Aug 8, 7:29 PM EDTFlash Flood WarningFFCCatoosa4 hr

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.