Alert archive / Georgia / Flash Flood Warnings in 2013

Flash Flood Warning 87, NWS Atlanta, GA

August 18, 2013Jasper County, Putnam County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 18, 2013, 11:46 PM EDT for Jasper County, Putnam 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 18, 2013, 11:46 PM EDT (03:46 UTC)
Expired
Aug 19, 2013, 5:45 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Jasper County, GA, Putnam County, GA

The radar

The Robins AFB radar (KJGX), 66 km from the middle of the area, began a volume at 03:50 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 19, 2:15 AM EDTFLASH FLOOD3 Wsw Eatonton, GAA USGS STREAM GAGE ON THE LITTLE RIVER AT GEORGIA HIGHWAY 16 REACHED FLOOD STAGE OF 20 FEET. MINOR FLOODING OCCURRED IN THE WOODLANDS...FIELDS AND DIRT ACCESS ROADS ALONG THE RIVER.

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 00:00Z, 3.8 hours before the alert went out and 95 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 00:00Z on 2013-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 865 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 00:00Z on 2013-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.19395878Sfc1 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
865 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

903 
WGUS52 KFFC 190346
FFWFFC
GAC159-237-190945-
/O.NEW.KFFC.FF.W.0087.130819T0346Z-130819T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1146 PM EDT SUN AUG 18 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN JASPER COUNTY IN CENTRAL GEORGIA
  WESTERN PUTNAM COUNTY IN CENTRAL GEORGIA

* UNTIL 545 AM EDT MONDAY

* AT 1135 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM HEAVY RAINS OVER THE WARNED AREA. RAINFALL 
  OF 2.5 TO 3.5 INCHES IS INDICATED OVER THE AREA IN THE PAST 2 
  HOURS. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHADY 
  DALE...WILLARD...STANFORDVILLE...THE CENTRAL GEORGIA EXPERIMENTAL 
  STATION AND EATONTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP 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. SOME CREEKS AND STREAMS THAT MAY SEE 
FLOODING ARE THE LITTLE RIVER...PEARSON CREEK...BEAVERDAM CREEK...
MURDER CREEK AND GLADY CREEK.

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 3319 8331 3318 8342 3318 8348 3316 8356
      3315 8369 3338 8367 3344 8353 3344 8339

$$

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, 10:19 PM EDTFlash Flood WarningFFCToombs6 hr
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 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.