Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 79, NWS Atlanta, GA

August 12, 2013Lumpkin County, White County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 12, 2013, 4:50 PM EDT for Lumpkin County, White 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 12, 2013, 4:50 PM EDT (20:50 UTC)
Expired
Aug 12, 2013, 10:45 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Lumpkin County, GA, White County, GA

The radar

The Greer radar (KGSP), 147 km from the middle of the area, began a volume at 20:53 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 12, 5:30 PM EDTFLASH FLOOD5 Ssw Cleveland, GAWHITE COUNTY EMA RELAYED A REPORT OF WATER OVER THE ROAD...UP TO 8 INCHES OF WATER OVER HWY 115. THE EMA ALSO REPORTED A COUPLE OF CULVERTS WERE WASHED OUT ON HWY 284 OFF OF 115. RADAR ESTIMATED THAT UP TO 4 INCHES FELL IN THIS AREA.

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, 8.8 hours before the alert went out and 146 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 2013-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1856 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 2013-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 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
1856 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
696 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
-21 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.

121 
WGUS52 KFFC 122050
FFWFFC
GAC187-311-130245-
/O.NEW.KFFC.FF.W.0079.130812T2050Z-130813T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
450 PM EDT MON AUG 12 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHERN WHITE COUNTY IN NORTHEAST GEORGIA

* UNTIL 1045 PM EDT

* AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THAT HEAVY RAIN FROM THUNDERSTORMS HAD FALLEN IN THE WARNED AREA.  
  DOPPLER RADAR ESTIMATES THAT ANYWHERE FROM 2 TO 2.5 INCHES OF RAIN 
  HAS FALLEN IN THE LAST HOUR...THIS RAINFALL COULD LEAD TO FLASH    
  FLOODING...ESPECIALLY IN SOUTHWEST WHITE COUNTY.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLEVELAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS...STREAMS AND COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3460 8368 3452 8365 3451 8366 3450 8377
      3452 8378 3450 8380 3450 8384 3452 8386
      3453 8393 3462 8390

$$
2 follow-up statements
852 
WGUS72 KFFC 122252
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
652 PM EDT MON AUG 12 2013

GAC187-311-130245-
/O.CON.KFFC.FF.W.0079.000000T0000Z-130813T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITE GA-LUMPKIN GA-
652 PM EDT MON AUG 12 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR EAST
CENTRAL LUMPKIN AND SOUTHERN WHITE COUNTIES...

AT 644 PM EDT...LOCAL EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH 
FLOODING IN THE WARNED AREA. AREAS ACROSS SOUTHWEST WHITE COUNTY ARE 
REPORTED TO HAVE WATER OVER THE ROADS.  THE WATER IS STARTING TO 
RECEDE...BE CAREFUL DRIVING ACROSS THIS AREA TONIGHT AS WASHED ROADS 
MAY MAKE TRAVEL DANGEROUS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLEVELAND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS...STREAMS AND COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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. YOU CAN ALSO TWEET YOUR REPORT
USING HASHTAG GAWX.

&&

LAT...LON 3460 8368 3452 8365 3451 8366 3450 8377
      3452 8378 3450 8380 3450 8384 3452 8386
      3453 8393 3462 8390

$$
244 
WGUS72 KFFC 130040
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
840 PM EDT MON AUG 12 2013

GAC187-311-130047-
/O.CAN.KFFC.FF.W.0079.000000T0000Z-130813T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITE GA-LUMPKIN GA-
840 PM EDT MON AUG 12 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL 
LUMPKIN AND SOUTHERN WHITE 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 3460 8368 3452 8365 3451 8366 3450 8377
      3452 8378 3450 8380 3450 8384 3452 8386
      3453 8393 3462 8390

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 8:02 PM EDTSpecial Weather StatementFFCCherokee43 min
Aug 11, 9:54 PM EDTSpecial Weather StatementFFCClarke, Jackson36 min
Aug 12, 1:43 PM EDTSpecial Weather StatementFFCWhitfield32 min
Aug 12, 1:49 PM EDTSpecial Weather StatementFFCDeKalb, Fulton26 min
Aug 12, 2:23 PM EDTSpecial Weather StatementFFCGordon37 min
Aug 12, 2:56 PM EDTSpecial Weather StatementFFCGordon64 min
Aug 12, 3:24 PM EDTSpecial Weather StatementFFCCherokee36 min
Aug 12, 3:28 PM EDTSpecial Weather StatementFFCGreene32 min
Aug 12, 3:55 PM EDTSpecial Weather StatementFFCCherokee35 min
Aug 12, 4:16 PM EDTSpecial Weather StatementFFCWhite29 min
Aug 12, 4:39 PM EDTSpecial Weather StatementFFCWhite66 min
Aug 12, 5:02 PM EDTSpecial Weather StatementFFCMorgan28 min
Aug 12, 5:32 PM EDTSpecial Weather StatementFFCGreene, Morgan43 min
Aug 12, 5:34 PM EDTSpecial Weather StatementFFCDouglas26 min
Aug 12, 5:40 PM EDTSpecial Weather StatementFFCPaulding65 min
Aug 12, 6:17 PM EDTSpecial Weather StatementFFCFulton43 min
Aug 12, 6:27 PM EDTSpecial Weather StatementFFCCarroll33 min
Aug 12, 6:56 PM EDTSpecial Weather StatementFFCHeard34 min
Aug 12, 7:13 PM EDTSpecial Weather StatementFFCCoweta32 min
Aug 12, 7:29 PM EDTSevere Thunderstorm WarningFFCCoweta, Fayette46 min
Aug 12, 7:44 PM EDTSpecial Weather StatementFFCJones31 min
Aug 12, 7:46 PM EDTSpecial Weather StatementFFCHenry29 min
Aug 12, 7:49 PM EDTSpecial Weather StatementFFCSpalding26 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.