Alert archive / Georgia / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Jul 20, 2021, 7:17 PM EDT for Carroll County, Haralson County, Georgia. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 20, 2021, 7:17 PM EDT (23:17 UTC)
- Expired
- Jul 21, 2021, 1:15 AM EDT
- In force
- 6 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Carroll County, GA, Haralson County, GA
The radar
The Atlanta radar (KFFC), 66 km from the middle of the area, began a volume at 23:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 7:30 PM EDT | FLASH FLOOD | 3 Nnw Mount Zion, GA | NUMEROUS REPORTS OF ROAD CLOSURES DUE TO FLASH FLOODING IN CARROLL COUNTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 11.3 hours before the alert went out and 160 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
- 690 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
214
WGUS52 KFFC 202317
FFWFFC
GAC045-143-210515-
/O.NEW.KFFC.FF.W.0015.210720T2317Z-210721T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
717 PM EDT Tue Jul 20 2021
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
West Central Carroll County in northwestern Georgia...
Southern Haralson County in northwestern Georgia...
* Until 115 AM EDT.
* At 717 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. Additional rainfall amounts of a half to 1 inch
is possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
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...
Bremen, Mount Zion, Waco and Bowdon Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3370 8534 3377 8510 3374 8506 3371 8505
3369 8504 3365 8507 3363 8516 3362 8533
FLASH FLOOD...RADAR INDICATED
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 9:37 PM EDT | Special Weather Statement | FFC | Coweta | 53 min |
| Jul 19, 10:07 PM EDT | Flash Flood Warning | FFC | Coweta, Heard, Troup | 6 hr |
| Jul 19, 10:13 PM EDT | Flash Flood Warning | FFC | Clayton, DeKalb, Fulton | 6 hr |
| Jul 19, 10:22 PM EDT | River Flood Warning | FFC | DeKalb | 4 hr |
| Jul 19, 10:31 PM EDT | River Flood Warning | FFC | DeKalb | 2 hr |
| Jul 19, 11:09 PM EDT | River Flood Warning | FFC | DeKalb | 98 min |
| Jul 20, 3:21 AM EDT | Flash Flood Watch | FFC | Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 39 more | 19 hr |
| Jul 20, 1:45 PM EDT | Special Weather Statement | FFC | Hancock | 30 min |
| Jul 20, 3:54 PM EDT | Special Weather Statement | FFC | Newton | 36 min |
| Jul 20, 4:22 PM EDT | Special Weather Statement | FFC | Morgan | 23 min |
| Jul 20, 5:01 PM EDT | Special Weather Statement | FFC | Wilkes | 44 min |
| Jul 20, 5:40 PM EDT | Special Weather Statement | FFC | Meriwether, Troup | 35 min |
| Jul 20, 5:55 PM EDT | Special Weather Statement | FFC | Bibb | 35 min |
| Jul 20, 7:41 PM EDT | Special Weather Statement | FFC | Lamar, Pike | 49 min |
| Jul 20, 7:57 PM EDT | Special Weather Statement | FFC | Johnson | 48 min |
Nearby
Flash Flood Warnings in Georgia, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.