Alert archive / Georgia / Flash Flood Warnings in 2022

Flash Flood Warning 21, NWS Atlanta, GA

August 6, 20226 counties in Georgia

NWS Atlanta, GA issued this flash flood warning at Aug 6, 2022, 10:51 PM EDT for 6 counties in Georgia. It was in force for 3 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 6, 2022, 10:51 PM EDT (02:51 UTC)
Expired: Aug 7, 2022, 1:45 AM EDT
In force: 3 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Clayton County, GA, Cobb County, GA, DeKalb County, GA, Fulton County, GA, Gwinnett County, GA, Henry County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 2.9 hours before the alert went out and 36 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: 1703 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

263 
WGUS52 KFFC 070251
FFWFFC
GAC063-067-089-121-135-151-070545-
/O.NEW.KFFC.FF.W.0021.220807T0251Z-220807T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
1051 PM EDT Sat Aug 6 2022

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Clayton County in north central Georgia...
  Southeastern Cobb County in north central Georgia...
  DeKalb County in north central Georgia...
  Southeastern Fulton County in north central Georgia...
  Southwestern Gwinnett County in north central Georgia...
  Northwestern Henry County in north central Georgia...

* Until 145 AM EDT.

* At 1051 PM EDT, local law enforcement reported thunderstorms 
  producing heavy rain across the warned area. Between 0.5 and 2 
  inches of rain have fallen. Additional rainfall amounts up to 1 
  inch are possible in the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Atlanta, Decatur, Jonesboro, City of South Fulton, Sandy Springs, 
  Roswell, Johns Creek, Smyrna, Dunwoody, East Point, Duluth, 
  Stockbridge, Union City, Forest Park, Riverdale, College Park, 
  Lilburn, Chamblee, Norcross and Doraville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3379 8460 3406 8418 3376 8402 3364 8415
      3365 8418 3362 8417 3350 8434 3352 8443
      3355 8444 3354 8449 3356 8454 3374 8458
      3375 8458

FLASH FLOOD...OBSERVED

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:10 PM EDT	Special Weather Statement	FFC	DeKalb	35 min
Aug 6, 8:11 PM EDT	Special Weather Statement	FFC	DeKalb	49 min
Aug 6, 8:17 PM EDT	Special Weather Statement	FFC	Monroe	28 min
Aug 6, 8:27 PM EDT	Special Weather Statement	FFC	Walton	48 min
Aug 6, 8:32 PM EDT	Special Weather Statement	FFC	Glascock, Warren	43 min
Aug 6, 8:34 PM EDT	Special Weather Statement	FFC	Newton	26 min
Aug 6, 8:41 PM EDT	Special Weather Statement	FFC	DeKalb	49 min
Aug 6, 9:06 PM EDT	Special Weather Statement	FFC	Newton, Rockdale	39 min
Aug 6, 9:32 PM EDT	Special Weather Statement	FFC	DeKalb, Fulton	43 min
Aug 6, 9:35 PM EDT	Special Weather Statement	FFC	Morgan	25 min
Aug 6, 9:39 PM EDT	Special Weather Statement	FFC	Lamar, Pike	36 min
Aug 6, 10:15 PM EDT	Special Weather Statement	FFC	Pike	30 min
Aug 6, 10:37 PM EDT	Special Weather Statement	FFC	Fayette	23 min
Aug 6, 11:04 PM EDT	Special Weather Statement	FFC	Whitfield	26 min
Aug 6, 11:44 PM EDT	Flash Flood Warning	FFC	Catoosa, Fannin, Murray, Whitfield	3 hr
Aug 7, 4:40 PM EDT	Special Weather Statement	FFC	Jeff Davis	35 min
Aug 7, 6:01 PM EDT	Severe Thunderstorm Warning	FFC	Muscogee	29 min
Aug 7, 6:09 PM EDT	Special Weather Statement	FFC	Laurens	36 min
Aug 7, 7:03 PM EDT	Special Weather Statement	FFC	Troup	27 min
Aug 7, 7:21 PM EDT	Special Weather Statement	FFC	Bibb	39 min
Aug 7, 7:24 PM EDT	Special Weather Statement	FFC	Troup	36 min
Aug 7, 7:25 PM EDT	Special Weather Statement	FFC	Crawford	35 min
Aug 7, 7:53 PM EDT	Special Weather Statement	FFC	Crawford	37 min

Nearby

Flash Flood Warnings in Georgia, 2022 Every flash flood warning in 2022

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.