Alert archive / Georgia / Flash Flood Warnings in 2017

Flash Flood Warning 41, NWS Atlanta, GA

August 10, 2017Bartow County, Cherokee County, Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 10, 2017, 1:33 PM EDT for Bartow County, Cherokee 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 10, 2017, 1:33 PM EDT (17:33 UTC)
Expired: Aug 10, 2017, 7:30 PM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Bartow County, GA, Cherokee County, GA

The radar

The Atlanta radar (KFFC), 101 km from the middle of the area, began a volume at 17:36 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, 5.6 hours before the alert went out and 102 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: 620 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

278 
WGUS52 KFFC 101733
FFWFFC
GAC015-057-102330-
/O.NEW.KFFC.FF.W.0041.170810T1733Z-170810T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
133 PM EDT THU AUG 10 2017

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Western Cherokee County in north central Georgia...
  Bartow County in northwestern Georgia...

* Until 730 PM EDT

* At 132 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to three inches of rain 
  have fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Canton, Cartersville, Acworth, Adairsville, Euharlee, Emerson,
  White, Waleska, Kingston, Taylorsville, Cassville, Kellogg Creek,
  Red Top Mountain State Park, Folsom, Hobgood Park, Funkhouser, Lake
  Arrowhead, Oak Grove, Little River Landing and George Washington
  Carver St Pk.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

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 report at
NWSATLANTA.

&&

LAT...LON 3420 8505 3421 8504 3421 8502 3423 8502
      3440 8491 3440 8473 3441 8473 3441 8470
      3439 8458 3438 8458 3437 8448 3412 8456
      3407 8460 3408 8474 3408 8499 3410 8505

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 1:10 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee	35 min
Aug 10, 1:57 PM EDT	Special Weather Statement	FFC	Murray, Walker, Whitfield	33 min
Aug 10, 2:33 PM EDT	Special Weather Statement	FFC	Chattooga, Murray, Whitfield	27 min
Aug 10, 3:05 PM EDT	Special Weather Statement	FFC	Gwinnett, Haralson, Paulding, Polk	25 min
Aug 10, 3:13 PM EDT	Special Weather Statement	FFC	Macon, Schley	32 min
Aug 10, 3:42 PM EDT	Special Weather Statement	FFC	Chattooga, Gordon, Pickens	33 min
Aug 10, 3:55 PM EDT	Special Weather Statement	FFC	Banks, Hall, Jackson	35 min
Aug 10, 4:24 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee, Floyd, Pickens	36 min
Aug 10, 4:47 PM EDT	Special Weather Statement	FFC	Carroll	28 min
Aug 10, 5:12 PM EDT	Special Weather Statement	FFC	Carroll, Douglas	33 min
Aug 10, 5:22 PM EDT	Special Weather Statement	FFC	DeKalb, Rockdale	23 min
Aug 10, 6:26 PM EDT	Special Weather Statement	FFC	Clayton, Coweta, DeKalb, Fayette, Heard, Henry and 2 more	34 min
Aug 10, 6:48 PM EDT	Special Weather Statement	FFC	Chattooga, Floyd	27 min
Aug 10, 7:32 PM EDT	Special Weather Statement	FFC	Harris, Heard, Troup	28 min
Aug 10, 7:37 PM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette	38 min
Aug 10, 7:56 PM EDT	Special Weather Statement	FFC	Meriwether, Troup	34 min

Nearby

Flash Flood Warnings in Georgia, 2017 Every flash flood warning in 2017

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.