Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 74, NWS Atlanta, GA

August 8, 2013Banks County, Hall County, Jackson County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 8, 2013, 2:13 PM EDT for Banks County, Hall County, Jackson County, Georgia. It was in force for 6 hr. 1 report 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
Aug 8, 2013, 2:13 PM EDT (18:13 UTC)
Expired
Aug 8, 2013, 8:15 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Banks County, GA, Hall County, GA, Jackson County, GA

The radar

The Atlanta radar (KFFC), 129 km from the middle of the area, began a volume at 18:14 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
Aug 8, 3:45 PM EDTFLASH FLOOD6 Nnw Homer, GATHE BANKS COUNTY EMERGENCY MANAGER REPORTED FLOOD WATERS FROM DRAINAGE DITCHES AND SMALL STREAMS OVERFLOWING PORTIONS OF AROUND 7 ROADS BETWEEN ALTO AND HOMER. SOME EROSION DAMAGE OCCURRED TO GRAVEL ROADS AND CULVERT PIPES.

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, 6.2 hours before the alert went out and 125 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 2013-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1205 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 2013-08-08The 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
1205 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
546 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-72 m²/s²
0-3 km storm-relative helicity
-23 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.

769 
WGUS52 KFFC 081813
FFWFFC
GAC011-139-157-090015-
/O.NEW.KFFC.FF.W.0074.130808T1813Z-130809T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HALL COUNTY IN NORTH CENTRAL GEORGIA
  BANKS COUNTY IN NORTHEAST GEORGIA
  JACKSON COUNTY IN NORTHEAST GEORGIA

* UNTIL 815 PM EDT

* AT 209 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  MULTIPLE STORMS PRODUCING RAINFALL AMOUNTS OF NEAR 2 INCHES IN 
  ONE HOUR MOVING NORTHEAST AT 10 MPH. ADDITIONAL RAINFALL AMOUNTS 
  OF UP TO 2 INCHES ARE LIKELY. THIS WILL BE ENOUGH TO PRODUCE 
  FLASH FLOODING IN THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MAYSVILLE...HOMER...LULA...GILLSVILLE...GAINESVILLE AND CLERMONT.

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 3444 8362 3450 8353 3448 8343 3444 8338
      3433 8339 3425 8333 3404 8361 3407 8377
      3412 8382 3410 8388 3417 8406 3419 8405
      3419 8399 3422 8396 3428 8393 3433 8396
      3447 8383 3451 8366

$$
2 follow-up statements
158 
WGUS72 KFFC 081938
FFSFFC

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

GAC011-139-157-090015-
/O.CON.KFFC.FF.W.0074.000000T0000Z-130809T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANKS GA-HALL GA-JACKSON GA-
338 PM EDT THU AUG 8 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
JACKSON...HALL AND BANKS COUNTIES...

AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF THUNDERSTORMS WITH HEAVY RAIN THAT MAY PRODUCE
SOME FLASH FLOODING. THE STORMS WERE FROM GAINESVILLE TO JACKSON TO 
HOMER MOVING NORTHEAST AT 10 MPH.

ISOLATED RAINFALL AMOUNTS OF 2 TO 3 INCHES HAVE OCCURRED IN THE 
FLOWERY BRANCH AND CHESTNUT MOUNTAIN AREAS OF SOUTH HALL COUNTY.
ANOTHER INCH OR TWO IS POSSIBLE. THE UPPER MIDDLE OCONEE RIVER AND 
COOPER CREEK BASINS MAY BE AT BANKFULL DUE TO THE HEAVY RAIN.

THE WARNED AREA WILL BE MONITORED FOR REDEVELOPMENT OF HEAVY RAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...AS WELL AS HIGHWAYS AND UNDERPASSES.
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 3444 8362 3450 8353 3448 8343 3444 8338
      3433 8339 3425 8333 3404 8361 3407 8377
      3412 8382 3410 8388 3417 8406 3419 8405
      3419 8399 3422 8396 3428 8393 3433 8396
      3447 8383 3451 8366

$$


16
770 
WGUS72 KFFC 082222
FFSFFC

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

GAC011-139-157-082230-
/O.CAN.KFFC.FF.W.0074.000000T0000Z-130809T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANKS GA-HALL GA-JACKSON GA-
622 PM EDT THU AUG 8 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR JACKSON...HALL AND
BANKS COUNTIES...

THE HEAVIER RAINFALL FROM EARLIER THIS AFTERNOON HAS ENDED AND THE 
AREA HAS HAD TIME TO DRAIN. NO OTHER FLASH FLOODING HAS BEEN 
REPORTED OR IS BEING OBSERVED. THEREFORE THE FLASH FLOOD WARNING IS 
BEING CANCELED.

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 3444 8362 3450 8353 3448 8343 3444 8338
      3433 8339 3425 8333 3404 8361 3407 8377
      3412 8382 3410 8388 3417 8406 3419 8405
      3419 8399 3422 8396 3428 8393 3433 8396
      3447 8383 3451 8366

$$

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, 2:46 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, 6:46 PM EDTFlash Flood WarningFFCDade, Walker4 hr
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.