Alert archive / Georgia / Flash Flood Warnings in 2015

Flash Flood Warning 57, NWS Atlanta, GA

December 30, 20158 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Dec 30, 2015, 4:46 PM EST for 8 counties in 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
Dec 30, 2015, 4:46 PM EST (21:46 UTC)
Expired
Dec 30, 2015, 10:45 PM EST
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Glascock County, GA, Greene County, GA, Hancock County, GA, Putnam County, GA, Taliaferro County, GA, Warren County, GA, Washington County, GA, Wilkes County, GA

The radar

The Robins AFB radar (KJGX), 80 km from the middle of the area, began a volume at 21:47 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

Charleston AFB, SC (KCHS), launched 12:00Z, 9.8 hours before the alert went out and 276 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, Charleston AFB, SC at 12:00Z on 2015-12-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 610 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, Charleston AFB, SC at 12:00Z on 2015-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
610 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

285 
WGUS52 KFFC 302146
FFWFFC
GAC125-133-141-237-265-301-303-317-310345-
/O.NEW.KFFC.FF.W.0057.151230T2146Z-151231T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
446 PM EST WED DEC 30 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN WILKES COUNTY IN EAST CENTRAL GEORGIA...
  HANCOCK COUNTY IN EAST CENTRAL GEORGIA...
  GLASCOCK COUNTY IN EAST CENTRAL GEORGIA...
  WARREN COUNTY IN EAST CENTRAL GEORGIA...
  SOUTHEASTERN GREENE COUNTY IN EAST CENTRAL GEORGIA...
  NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL GEORGIA...
  TALIAFERRO COUNTY IN EAST CENTRAL GEORGIA...
  PUTNAM COUNTY IN CENTRAL GEORGIA...

* UNTIL 1045 PM EST WEDNESDAY
    
* AT 444 PM EST...DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF
  RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS LIKELY IN THE WARNED
  AREA.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EATONTON...WASHINGTON...GREENSBORO...WARRENTON...SPARTA...GIBSON...
  CRAWFORDVILLE...UNION POINT...WHITE PLAINS...SILOAM...NORWOOD...
  MITCHELL...SHARON...CAMAK...EDGE HILL...PHOENIX...REYNOLDS
  PLANTATION...EDGEHILL...LIBERTY AND SPRINGFIELD.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE SIGNIFICANT FLOODING CALL THE NATIONAL WEATHER SERVICE
TOLL FREE AT 1 8 6 6 7 6 3 4 4 6 6 OR TWEET US YOUR WARNING AT
NWSATLANTA.

&&

LAT...LON 3317 8259 3312 8258 3313 8266 3302 8304
      3308 8305 3305 8310 3315 8309 3316 8312
      3319 8326 3317 8354 3317 8355 3343 8353
      3348 8328 3353 8327 3382 8259 3364 8248
      3365 8258 3360 8265 3335 8255 3331 8239

$$
1 follow-up statement
136 
WGUS72 KFFC 310343
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1043 PM EST WED DEC 30 2015

GAC125-133-141-237-265-301-303-317-310353-
/O.EXP.KFFC.FF.W.0057.000000T0000Z-151231T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILKES GA-HANCOCK GA-GLASCOCK GA-WARREN GA-GREENE GA-WASHINGTON GA-
TALIAFERRO GA-PUTNAM GA-
1043 PM EST WED DEC 30 2015

...THE FLASH FLOOD WARNING FOR SOUTHERN WILKES...HANCOCK...
GLASCOCK...WARREN...SOUTHEASTERN GREENE...NORTHWESTERN WASHINGTON...
TALIAFERRO AND PUTNAM COUNTIES WILL EXPIRE AT 1045 PM EST...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 3317 8259 3312 8258 3313 8266 3302 8304
      3308 8305 3305 8310 3315 8309 3316 8312
      3319 8326 3317 8354 3317 8355 3343 8353
      3348 8328 3353 8327 3382 8259 3364 8248
      3365 8258 3360 8265 3335 8255 3331 8239

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 29, 7:53 PM ESTRiver Flood WarningFFCClayton, Fayette, Spalding15 hr
Dec 29, 8:33 PM ESTRiver Flood WarningFFCDeKalb, Rockdale49 hr
Dec 29, 10:07 PM ESTRiver Flood WarningFFCFayette, Spalding3 days
Dec 30, 6:15 AM ESTSpecial Weather StatementFFCTroup45 min
Dec 30, 7:29 AM ESTFlash Flood WarningFFCBarrow, Cobb, DeKalb, Douglas, Forsyth, Fulton and 1 more6 hr
Dec 30, 8:23 AM ESTFlash Flood WarningFFCBanks, Bartow, Cherokee, Cobb, Dawson, Forsyth and 7 more6 hr
Dec 30, 10:51 AM ESTRiver Flood WarningFFCWashington, Wilkinson51 hr
Dec 30, 10:51 AM ESTRiver Flood WarningFFCForsyth19 hr
Dec 30, 10:51 AM ESTRiver Flood WarningFFCNewton3 days
Dec 30, 11:35 AM ESTSpecial Weather StatementFFCLamar, Upson25 min
Dec 30, 11:49 AM ESTSpecial Weather StatementFFCJasper26 min
Dec 30, 12:05 PM ESTFlash Flood WarningFFCGreene, Morgan, Oconee, Oglethorpe, Wilkes10 hr
Dec 30, 12:30 PM ESTFlash Flood WarningFFCChattahoochee, Harris, Meriwether, Muscogee, Pike, Talbot and 3 more9 hr
Dec 30, 12:37 PM ESTRiver Flood WarningFFCFayette34 hr
Dec 30, 12:41 PM ESTSpecial Weather StatementFFCButts, Henry, Jasper, Lamar, Monroe, Newton and 3 more94 min
Dec 30, 12:50 PM ESTFlash Flood WarningFFCButts, Clayton, Coweta, Fayette, Henry, Jasper and 6 more9 hr
Dec 30, 1:19 PM ESTFlash Flood WarningFFCBarrow, Clarke, Jackson, Madison, Oconee, Oglethorpe6 hr
Dec 30, 2:38 PM ESTRiver Flood WarningFFCMorgan, Newton24 hr
Dec 30, 2:38 PM ESTRiver Flood WarningFFCBarrow, Jackson22 hr
Dec 30, 3:17 PM ESTRiver Flood WarningFFCClayton, Fayette, Spalding32 hr
Dec 30, 3:17 PM ESTRiver Flood WarningFFCCoweta, Fayette, Spalding26 hr
Dec 30, 3:17 PM ESTRiver Flood WarningFFCNewton8 days
Dec 30, 3:35 PM ESTRiver Flood WarningFFCTroup27 hr
Dec 30, 4:03 PM ESTRiver Flood WarningFFCNewton, Rockdale24 hr
Dec 30, 5:40 PM ESTFlash Flood WarningFFCMacon, Marion, Schley, Stewart, Sumter, Taylor and 1 more6 hr
Dec 30, 5:52 PM ESTRiver Flood WarningFFCNewton, Walton24 hr

Nearby

Flash Flood Warnings in Georgia, 2015Every flash flood warning in 2015

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.