Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 86, NWS Atlanta, GA

August 18, 2013Toombs County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 18, 2013, 10:19 PM EDT for Toombs 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
Aug 18, 2013, 10:19 PM EDT (02:19 UTC)
Expired
Aug 19, 2013, 4:15 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Toombs County, GA

The radar

The Robins AFB radar (KJGX), 123 km from the middle of the area, began a volume at 02:20 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

Jacksonville, FL (KJAX), launched 00:00Z, 2.3 hours before the alert went out and 175 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, Jacksonville, FL at 00:00Z on 2013-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1736 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, Jacksonville, FL at 00:00Z on 2013-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
1736 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
14 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.

749 
WGUS52 KFFC 190219
FFWFFC
GAC279-190815-
/O.NEW.KFFC.FF.W.0086.130819T0219Z-130819T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1019 PM EDT SUN AUG 18 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN TOOMBS COUNTY IN SOUTHEAST GEORGIA

* UNTIL 415 AM EDT

* AT 1010 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH    
  FLOODING FROM HEAVY RAINS OVER THE WARNED AREA WITH ROADS CLOSED. 
  HIGHWAY 147 AND CEDAR CROSSING ROAD HAVE BEEN CLOSED BY FLOOD      
  WATERS. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOUTH
  THOMPSON...TOOMBS CENTRAL...NEW BRANCH...JOHNSON CORNER AND CEDAR
  CROSSING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAINFALL AMOUNTS OF 3 TO 4 INCHES HAVE FALLEN IN THE WARNED AREA AND 
ADDITIONAL RAINFALL AMOUNTS OF A HALF INCH TO AN INCH ARE POSSIBLE 
IN THE WARNED AREA.

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.

FLOODING IS LIKELY ON BELLS MILL CREEK...COBB CREEK AND OTHER SMALL 
CREEKS AND STREAMS IN THE AREA. 

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 3193 8228 3193 8237 3195 8239 3195 8240
      3196 8244 3196 8246 3216 8236 3214 8219
      3191 8222 3191 8225

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:02 PM EDTSpecial Weather StatementFFCGreene28 min
Aug 18, 8:08 PM EDTSpecial Weather StatementFFCDooly, Macon, Sumter52 min
Aug 18, 8:29 PM EDTSpecial Weather StatementFFCCarroll31 min
Aug 18, 8:47 PM EDTSpecial Weather StatementFFCGreene, Oglethorpe, Taliaferro, Warren, Wilkes58 min
Aug 18, 8:57 PM EDTSpecial Weather StatementFFCMontgomery, Toombs, Treutlen63 min
Aug 18, 9:27 PM EDTAreal Flood WarningFFCGlascock, Jefferson6 hr
Aug 18, 9:35 PM EDTSpecial Weather StatementFFCMarion, Schley, Sumter, Webster55 min
Aug 18, 9:48 PM EDTSpecial Weather StatementFFCButts, Jasper, Morgan, Putnam57 min
Aug 18, 10:06 PM EDTSpecial Weather StatementFFCCrawford, Taylor54 min
Aug 18, 10:36 PM EDTSpecial Weather StatementFFCClarke, Greene, Jasper, Madison, Morgan, Newton and 7 more54 min
Aug 18, 10:41 PM EDTSpecial Weather StatementFFCDodge, Telfair, Wheeler64 min
Aug 18, 11:33 PM EDTSpecial Weather StatementFFCClarke, Greene, Morgan, Oconee, Oglethorpe, Putnam and 2 more57 min
Aug 18, 11:46 PM EDTFlash Flood WarningFFCJasper, Putnam6 hr
Aug 19, 12:00 AM EDTSpecial Weather StatementFFCCoweta, DeKalb, Douglas, Fulton45 min
Aug 19, 12:46 AM EDTSpecial Weather StatementFFCCherokee, Cobb, Dawson, Forsyth, Fulton, Hall and 1 more59 min
Aug 19, 12:57 AM EDTSpecial Weather StatementFFCClarke, Madison, Oconee, Oglethorpe63 min
Aug 19, 3:40 AM EDTRiver Flood WarningFFCForsyth, Fulton42 hr
Aug 19, 4:38 AM EDTRiver Flood WarningFFCForsyth16 hr
Aug 19, 5:50 AM EDTRiver Flood WarningFFCForsyth54 min
Aug 19, 3:00 PM EDTSpecial Weather StatementFFCLaurens60 min
Aug 19, 3:24 PM EDTSpecial Weather StatementFFCEmanuel36 min
Aug 19, 3:41 PM EDTSpecial Weather StatementFFCGlascock, Jefferson, Washington49 min
Aug 19, 4:04 PM EDTSpecial Weather StatementFFCWheeler41 min
Aug 19, 4:35 PM EDTSpecial Weather StatementFFCJefferson, Washington40 min
Aug 19, 4:41 PM EDTSpecial Weather StatementFFCWheeler49 min
Aug 19, 4:49 PM EDTSpecial Weather StatementFFCBleckley, Pulaski41 min
Aug 19, 5:02 PM EDTFlash Flood WarningFFCTelfair6 hr
Aug 19, 5:28 PM EDTFlash Flood WarningFFCBleckley6 hr
Aug 19, 5:35 PM EDTSpecial Weather StatementFFCTwiggs40 min
Aug 19, 6:18 PM EDTSpecial Weather StatementFFCTwiggs42 min
Aug 19, 6:23 PM EDTSpecial Weather StatementFFCToombs37 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.