Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 35, NWS Atlanta, GA

July 3, 20134 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Jul 3, 2013, 2:55 PM EDT for 4 counties in Georgia. It was in force for 6 hr. 2 reports 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
Jul 3, 2013, 2:55 PM EDT (18:55 UTC)
Expired
Jul 3, 2013, 8:45 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Coweta County, GA, Heard County, GA, Meriwether County, GA, Troup County, GA

The radar

The Atlanta radar (KFFC), 41 km from the middle of the area, began a volume at 18:54 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
Jul 3, 3:15 PM EDTFLOODLagrange, GAFLOODING IS OCCURING ON SOUTH GREENWOOD STREET IN LAGRANGE.
Jul 3, 3:50 PM EDTHEAVY RAIN 2.92Newnan, GATHIS IS A 6 HOUR TOTAL FROM 8 AM UNTIL 2 PM.

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, 6.9 hours before the alert went out and 47 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 2013-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1032 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 12:00Z on 2013-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1032 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.8

Open this sounding in Storm Lab

The text

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

217 
WGUS52 KFFC 031855
FFWFFC
GAC077-149-199-285-040045-
/O.NEW.KFFC.FF.W.0035.130703T1855Z-130704T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
255 PM EDT WED JUL 3 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COWETA COUNTY IN WEST CENTRAL GEORGIA
  HEARD COUNTY IN WEST CENTRAL GEORGIA
  NORTHWESTERN MERIWETHER COUNTY IN WEST CENTRAL GEORGIA
  TROUP COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 845 PM EDT

* AT 249 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.
  WIDESPREAD 3 TO 5 INCHES OF RAIN HAVE FALLEN ACRSOS THE WARNED
  AREA. WHILE THE RAIN HAS TAPERED OFF SOMEWHAT SINCE 1PM...
  ADDITIONAL RAINFAL AMOUNTS OF 1 TO 3 INCHES CAN BE EXPECTED
  THROUGH THE EVENING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SHARPSBURG...NEWNAN...CENTRALHATCHEE AND EPHESUS. EXPECT CONTINUED
  RISES ON CEDAR CREEK...WAHOO CREEK...SANDY CREEK...MOUNTAIN
  CREEK...YELLOWDIRT CREEK...AND OTHER TRIBUTARIES OF MAINLY THE
  CHATTAHOOCHEE RIVER.

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.

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 3342 8530 3343 8523 3342 8522 3343 8502
      3346 8498 3344 8494 3351 8485 3351 8462
      3327 8463 3316 8469 3300 8486 3287 8518
      3287 8519

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 10:30 PM EDTSpecial Weather StatementFFCTowns45 min
Jul 2, 10:42 PM EDTRiver Flood WarningFFCForsyth, Fulton63 hr
Jul 2, 11:22 PM EDTSpecial Weather StatementFFCMurray, Whitfield68 min
Jul 3, 9:51 AM EDTSpecial Weather StatementFFCHaralson, Polk54 min
Jul 3, 10:15 AM EDTFlash Flood WarningFFCHaralson2 hr
Jul 3, 12:00 PM EDTFlash Flood WarningFFCCoweta, Heard, Troup3 hr
Jul 3, 12:10 PM EDTFlash Flood WarningFFCHaralson6 hr
Jul 3, 1:24 PM EDTFlash Flood WarningFFCCarroll, Cherokee, Cobb, Douglas, Fulton6 hr
Jul 3, 1:46 PM EDTSpecial Weather StatementFFCButts, Monroe29 min
Jul 3, 2:16 PM EDTFlash Flood WarningFFCCherokee, Dawson, Fannin, Forsyth, Fulton, Gilmer and 3 more6 hr
Jul 3, 2:17 PM EDTRiver Flood WarningFFCForsyth15 hr
Jul 3, 2:28 PM EDTRiver Flood WarningFFCCobb6 hr
Jul 3, 4:12 PM EDTSpecial Weather StatementFFCTelfair33 min
Jul 3, 4:28 PM EDTFlash Flood WarningFFCWilkes6 hr
Jul 3, 4:31 PM EDTFlash Flood WarningFFCBaldwin, Wilkinson6 hr
Jul 3, 5:31 PM EDTFlash Flood WarningFFCBanks, Dawson, Hall, Lumpkin, Towns, Union and 1 more6 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.