Alert archive / Georgia / Flash Flood Warnings in 2020
Flash Flood Warning 46, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Aug 30, 2020, 8:38 PM EDT for Clayton County, Fayette County, Fulton 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 30, 2020, 8:38 PM EDT (00:38 UTC)
- Expired
- Aug 31, 2020, 2:45 AM EDT
- In force
- 6 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clayton County, GA, Fayette County, GA, Fulton County, GA
The radar
The Atlanta radar (KFFC), 32 km from the middle of the area, began a volume at 00:41 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 00:00Z, 0.6 hours before the alert went out and 29 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.
- Mixed-layer CAPE
- 317 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 776 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
549
WGUS52 KFFC 310038
FFWFFC
GAC063-113-121-310645-
/O.NEW.KFFC.FF.W.0046.200831T0038Z-200831T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
838 PM EDT Sun Aug 30 2020
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
Clayton County in north central Georgia...
Northeastern Fayette County in north central Georgia...
South Central Fulton County in north central Georgia...
* Until 245 AM EDT Monday.
* At 838 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Atlanta, Fayetteville, Jonesboro, East Point, Stockbridge, Union
City, Forest Park, Riverdale, College Park, Fairburn, Morrow,
Hapeville, Lake City, Hartsfield-Jackson Airport, Conley, Fort
Gillem, Lakewood Park, Cascade Heights, Irondale and Ellenwood.
Additional rainfall amounts of 1 to 1 and a half inches are possible
in the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
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.
Please report flooding to your local law enforcement agency when you
can do so safely.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3354 8458 3360 8458 3365 8455 3377 8448
3377 8445 3371 8438 3365 8435 3365 8428
3363 8427 3363 8426 3361 8426 3361 8425
3359 8424 3358 8426 3355 8426 3355 8429
3353 8429 3353 8428 3349 8428 3348 8450
FLASH FLOOD...RADAR INDICATED
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 8:16 PM EDT | Special Weather Statement | FFC | Clayton | 59 min |
| Aug 30, 8:30 PM EDT | Special Weather Statement | FFC | Gwinnett | 30 min |
| Aug 30, 8:52 PM EDT | Flash Flood Warning | FFC | Forsyth, Gwinnett | 6 hr |
| Aug 30, 8:56 PM EDT | Flash Flood Warning | FFC | Fulton | 6 hr |
| Aug 30, 9:36 PM EDT | River Flood Warning | FFC | Gwinnett | 3 hr |
| Aug 30, 9:49 PM EDT | River Flood Warning | FFC | Gwinnett | 9 hr |
| Aug 30, 9:54 PM EDT | Flash Flood Warning | FFC | Cherokee, Cobb, Fulton | 6 hr |
| Aug 31, 2:35 AM EDT | Areal Flood Warning | FFC | Clayton | 6 hr |
| Aug 31, 2:58 AM EDT | River Flood Warning | FFC | Gwinnett, Walton | 3 hr |
| Aug 31, 4:14 PM EDT | River Flood Warning | FFC | Clayton, Fayette, Spalding | 13 hr |
| Aug 31, 6:52 PM EDT | Special Weather Statement | FFC | Sumter | 38 min |
| Aug 31, 7:30 PM EDT | Special Weather Statement | FFC | Catoosa, Whitfield | 30 min |
| Aug 31, 7:35 PM EDT | Special Weather Statement | FFC | Sumter | 25 min |
| Aug 31, 7:57 PM EDT | Special Weather Statement | FFC | Crawford | 18 min |
Nearby
Flash Flood Warnings in Georgia, 2020Every flash flood warning in 2020
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.