Alert archive / Georgia / Flash Flood Warnings in 2015

Flash Flood Warning 19, NWS Atlanta, GA

August 19, 2015Carroll County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 19, 2015, 6:02 PM EDT for Carroll 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 19, 2015, 6:02 PM EDT (22:02 UTC)
Expired: Aug 20, 2015, 12:00 AM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

County Carroll County, GA

The radar

The Atlanta radar (KFFC), 38 km from the middle of the area, began a volume at 22:01 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.0 hours before the alert went out and 43 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 323 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

349 
WGUS52 KFFC 192202
FFWFFC
GAC045-200400-
/O.NEW.KFFC.FF.W.0019.150819T2202Z-150820T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
602 PM EDT WED AUG 19 2015

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN CARROLL COUNTY IN NORTHWESTERN GEORGIA...

* UNTIL MIDNIGHT EDT THURSDAY
    
* AT 559 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE 
  ALREADY FALLEN...AND AN ADDITIONAL INCH OR MORE OF RAIN IS 
  POSSIBLE THROUGH 630 PM EDT. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WHITESBURG...BYERS CROSSROADS...SEATON LAKE AND CLEM. 

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...LITTLE WOLF
CREEK...WAHOO CREEK...CEDAR CREEK...CURTIS CREEK...WHOOPING CREEK...
CHATTAHOOCHEE RIVER...PINE CREEK...ACORN CREEK...WOLF CREEK...BUFFALO
CREEK...SNAKE CREEK...CANEY CREEK AND NORMAN CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. 

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 3360 8500 3360 8491 3357 8490 3357 8486
      3353 8482 3352 8485 3349 8487 3348 8490
      3344 8493 3344 8496 3346 8498 3344 8498
      3344 8500 3354 8505

$$

1 follow-up statement

335 
WGUS72 KFFC 200102
FFSFFC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
902 PM EDT WED AUG 19 2015

GAC045-200110-
/O.CAN.KFFC.FF.W.0019.000000T0000Z-150820T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARROLL GA-
902 PM EDT WED AUG 19 2015

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN CARROLL COUNTY IS
CANCELLED...

DOPPLER RADAR ESTIMATES INDICATE 3.5 TO 4 INCHES OF RAIN FELL OVER 
THIS AREA EARLIER...HOWEVER THE HEAVY RAIN HAS ENDED AND FLOODING IS 
NO LONGER EXPECTED TO POSE A THREAT. NO REPORTS OF FLASH FLOODING 
HAVE BEEN RECEIVED BUT SMALL CREEKS AND STREAMS ARE LIKELY TO REMAIN 
AT OR NEAR BANKFULL THROUGH THE EVENING. 

LAT...LON 3360 8500 3360 8491 3357 8490 3357 8486
      3353 8482 3352 8485 3349 8487 3348 8490
      3344 8493 3344 8496 3346 8498 3344 8498
      3344 8500 3354 8505

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:36 PM EDT	Special Weather Statement	FFC	Coweta, Fayette	39 min
Aug 18, 11:52 PM EDT	Areal Flood Warning	FFC	Morgan, Oconee	4 hr
Aug 19, 12:07 AM EDT	River Flood Warning	FFC	Gwinnett, Walton	7 days
Aug 19, 12:10 PM EDT	Special Weather Statement	FFC	Bartow, Floyd, Gordon	35 min
Aug 19, 2:09 PM EDT	Special Weather Statement	FFC	Clarke, Oconee	51 min
Aug 19, 2:54 PM EDT	Special Weather Statement	FFC	Morgan, Oconee	51 min
Aug 19, 3:19 PM EDT	Special Weather Statement	FFC	Banks, Hall	41 min
Aug 19, 3:53 PM EDT	Special Weather Statement	FFC	Barrow	52 min
Aug 19, 4:44 PM EDT	Special Weather Statement	FFC	Hancock, Warren	46 min
Aug 19, 4:48 PM EDT	Special Weather Statement	FFC	DeKalb, Rockdale	42 min
Aug 19, 4:51 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee	39 min
Aug 19, 5:09 PM EDT	Special Weather Statement	FFC	Douglas	51 min
Aug 19, 5:31 PM EDT	Special Weather Statement	FFC	Warren	44 min
Aug 19, 5:35 PM EDT	Special Weather Statement	FFC	Barrow	40 min
Aug 19, 5:53 PM EDT	Special Weather Statement	FFC	Fulton	52 min
Aug 19, 6:00 PM EDT	Special Weather Statement	FFC	Gilmer, Gordon, Murray	45 min
Aug 19, 6:14 PM EDT	Flash Flood Warning	FFC	Douglas, Fulton	6 hr
Aug 19, 6:22 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Forsyth	38 min
Aug 19, 6:48 PM EDT	Special Weather Statement	FFC	Chattooga, Gordon	42 min
Aug 19, 7:33 PM EDT	Special Weather Statement	FFC	Murray, Whitfield	57 min

Nearby

Flash Flood Warnings in Georgia, 2015 Every 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.