Alert archive / Georgia / Flash Flood Warnings in 2021
Flash Flood Warning 32, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Sep 8, 2021, 6:16 PM EDT for 6 counties in Georgia. It was in force for 6 hr. 2 reports 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
- Sep 8, 2021, 6:16 PM EDT (22:16 UTC)
- Expired
- Sep 9, 2021, 12:15 AM EDT
- In force
- 6 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Barrow County, GA, Forsyth County, GA, Fulton County, GA, Gwinnett County, GA, Hall County, GA, Jackson County, GA
The radar
The Atlanta radar (KFFC), 89 km from the middle of the area, began a volume at 22:17 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 |
|---|---|---|---|
| Sep 8, 6:56 PM EDT | FLASH FLOOD | 3 Ene Alpharetta, GA | OVER A FOOT OF WATER COVERING THE INTERSECTION OF WINDWARD PLAZA AND WINDWARD PARKWAY IN ALPHARETTA. AT LEAST ONE STALLED VEHICLE IN THE WATER. |
| Sep 8, 7:05 PM EDT | FLASH FLOOD | 1 E Alpharetta, GA | WATER FLOWING OVER ACADEMY STREET. ROADWAY TEMPORARILY CLOSED AT TIME OF REPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 86 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
- 935 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
518
WGUS52 KFFC 082216
FFWFFC
GAC013-117-121-135-139-157-090415-
/O.NEW.KFFC.FF.W.0032.210908T2216Z-210909T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
616 PM EDT Wed Sep 8 2021
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
Western Barrow County in north central Georgia...
Southwestern Forsyth County in north central Georgia...
Northeastern Fulton County in north central Georgia...
Northern Gwinnett County in north central Georgia...
Southwestern Hall County in north central Georgia...
West Central Jackson County in northeastern Georgia...
* Until 1215 AM EDT.
* At 616 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. 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...
Lawrenceville, Winder, Cumming, Sandy Springs, Roswell, Johns
Creek, Alpharetta, Milton, Duluth, Sugar Hill, Suwanee, Buford,
Braselton, Auburn, Dacula, Berkeley Lake, Hoschton, Bethlehem,
Carl and Rest Haven.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
Be aware of your surroundings and do not drive on flooded roads.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3416 8436 3418 8404 3411 8383 3409 8365
3394 8368 3400 8438 3406 8439 3411 8442
3411 8440 3412 8439 3413 8436
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
925
WGUS72 KFFC 090002
FFSFFC
Flash Flood Statement
National Weather Service Peachtree City GA
802 PM EDT Wed Sep 8 2021
GAC013-117-121-135-139-157-090415-
/O.CON.KFFC.FF.W.0032.000000T0000Z-210909T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barrow GA-Forsyth GA-Fulton GA-Gwinnett GA-Hall GA-Jackson GA-
802 PM EDT Wed Sep 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT THURSDAY
FOR WESTERN BARROW, SOUTHWESTERN FORSYTH, NORTHEASTERN FULTON,
NORTHERN GWINNETT, SOUTHWESTERN HALL AND WEST CENTRAL JACKSON
COUNTIES...
At 802 PM EDT, Doppler radar indicated that thunderstorms produced
heavy rain across the warned area earlier. Although the persistent
heavy rain has ended, between 1.5 and 3.5 inches of rain have fallen
over the area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Lawrenceville, Winder, Cumming, Sandy Springs, Roswell, Johns
Creek, Alpharetta, Milton, Duluth, Sugar Hill, Suwanee, Buford,
Braselton, Auburn, Dacula, Berkeley Lake, Hoschton, Bethlehem,
Carl and Rest Haven.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3416 8436 3418 8404 3411 8383 3409 8365
3394 8368 3400 8438 3406 8439 3411 8442
3411 8440 3412 8439 3413 8436
FLASH FLOOD...RADAR INDICATED
$$514
WGUS72 KFFC 090200
FFSFFC
Flash Flood Statement
National Weather Service Peachtree City GA
1000 PM EDT Wed Sep 8 2021
GAC013-157-090210-
/O.CAN.KFFC.FF.W.0032.000000T0000Z-210909T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Barrow GA-Jackson GA-
1000 PM EDT Wed Sep 8 2021
...FLASH FLOOD WARNING IS CANCELLED FOR WESTERN BARROW AND WEST
CENTRAL JACKSON COUNTIES...
Flash flooding is no longer expected to pose a threat. Please
continue to be alert for high water on creeks and streams and heed
any remaining road closures.
LAT...LON 3416 8436 3418 8404 3411 8383 3400 8387
3395 8381 3400 8438 3406 8439 3411 8442
3412 8436
$$
GAC117-121-135-139-090415-
/O.CON.KFFC.FF.W.0032.000000T0000Z-210909T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Forsyth GA-Fulton GA-Gwinnett GA-Hall GA-
1000 PM EDT Wed Sep 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT THURSDAY
FOR SOUTHWESTERN FORSYTH, NORTHEASTERN FULTON, NORTHERN GWINNETT AND
SOUTHWESTERN HALL COUNTIES...
At 1000 PM EDT, Although the persistent heavy rain has ended,
between 1.5 and 3.5 inches of rain fell over the area earlier. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Lawrenceville, Cumming, Sandy Springs, Roswell, Johns Creek,
Alpharetta, Milton, Duluth, Sugar Hill, Suwanee, Buford,
Braselton, Dacula, Berkeley Lake, Rest Haven, Brookwood, Buford
Dam-Lake Lanier Parks and Hog Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 3416 8436 3418 8404 3411 8383 3400 8387
3395 8381 3400 8438 3406 8439 3411 8442
3412 8436
FLASH FLOOD...RADAR INDICATED
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 8:20 PM EDT | Special Weather Statement | FFC | Coweta, Heard | 25 min |
| Sep 7, 8:34 PM EDT | Special Weather Statement | FFC | Troup | 26 min |
| Sep 7, 8:36 PM EDT | Special Weather Statement | FFC | Polk | 39 min |
| Sep 7, 9:11 PM EDT | Flash Flood Warning | FFC | Haralson, Polk | 6 hr |
| Sep 7, 9:23 PM EDT | Special Weather Statement | FFC | Meriwether, Pike | 52 min |
| Sep 7, 10:02 PM EDT | Special Weather Statement | FFC | Coweta, Fayette | 43 min |
| Sep 7, 10:38 PM EDT | Special Weather Statement | FFC | Forsyth | 52 min |
| Sep 7, 10:49 PM EDT | Special Weather Statement | FFC | Clayton, Fayette | 41 min |
| Sep 7, 11:06 PM EDT | Severe Thunderstorm Warning | FFC | Clayton, Cobb, Douglas, Fulton | 24 min |
| Sep 7, 11:34 PM EDT | Severe Thunderstorm Warning | FFC | Cobb, DeKalb, Fulton | 26 min |
| Sep 7, 11:47 PM EDT | Flash Flood Warning | FFC | Cobb, Forsyth, Fulton, Gwinnett | 9 hr |
| Sep 8, 12:04 AM EDT | Special Weather Statement | FFC | Gwinnett | 26 min |
| Sep 8, 12:37 AM EDT | Special Weather Statement | FFC | Forsyth | 23 min |
| Sep 8, 12:55 AM EDT | River Flood Warning | FFC | Forsyth, Fulton | 38 hr |
| Sep 8, 1:01 AM EDT | River Flood Warning | FFC | Cobb | 7 hr |
| Sep 8, 1:08 AM EDT | River Flood Warning | FFC | Cobb | 4 hr |
| Sep 8, 1:13 AM EDT | River Flood Warning | FFC | Fulton, Gwinnett | 4 hr |
| Sep 8, 1:24 AM EDT | River Flood Warning | FFC | Forsyth | 4 hr |
| Sep 8, 1:46 AM EDT | River Flood Warning | FFC | Cobb | 4 hr |
| Sep 8, 1:51 AM EDT | River Flood Warning | FFC | Fulton | 7 hr |
| Sep 8, 5:31 AM EDT | River Flood Warning | FFC | Cobb, Fulton | 8 hr |
| Sep 8, 5:33 AM EDT | River Flood Warning | FFC | Cobb, Fulton | 10 hr |
| Sep 8, 5:38 AM EDT | River Flood Warning | FFC | Cobb, Fulton | 5 hr |
| Sep 8, 1:04 PM EDT | Special Weather Statement | FFC | Warren | 26 min |
| Sep 8, 1:30 PM EDT | Special Weather Statement | FFC | Warren | 30 min |
| Sep 8, 2:03 PM EDT | Special Weather Statement | FFC | Taliaferro | 27 min |
| Sep 8, 2:17 PM EDT | Special Weather Statement | FFC | Whitfield | 28 min |
| Sep 8, 2:47 PM EDT | Special Weather Statement | FFC | Hancock, Jasper, Putnam, Taliaferro, Warren | 43 min |
| Sep 8, 3:22 PM EDT | Special Weather Statement | FFC | Lamar, Meriwether, Pike, Spalding, Upson | 38 min |
| Sep 8, 3:56 PM EDT | Special Weather Statement | FFC | Lamar, Meriwether, Pike | 49 min |
| Sep 8, 4:15 PM EDT | Special Weather Statement | FFC | Baldwin, Hancock, Jones | 45 min |
| Sep 8, 4:25 PM EDT | Special Weather Statement | FFC | Chattooga | 50 min |
| Sep 8, 5:10 PM EDT | Special Weather Statement | FFC | Carroll | 50 min |
| Sep 8, 5:13 PM EDT | Special Weather Statement | FFC | Union | 47 min |
| Sep 8, 5:17 PM EDT | Special Weather Statement | FFC | Barrow, Clarke, Gwinnett, Jackson, Madison | 43 min |
| Sep 8, 5:28 PM EDT | Special Weather Statement | FFC | Jefferson, Washington | 47 min |
| Sep 8, 5:32 PM EDT | Special Weather Statement | FFC | Floyd | 43 min |
| Sep 8, 6:05 PM EDT | Special Weather Statement | FFC | Barrow, Forsyth, Jackson | 55 min |
| Sep 8, 6:08 PM EDT | Special Weather Statement | FFC | Gilmer, Pickens | 52 min |
| Sep 8, 6:57 PM EDT | Special Weather Statement | FFC | Dawson, Lumpkin, Pickens | 48 min |
| Sep 8, 7:23 PM EDT | River Flood Warning | FFC | Forsyth | 117 min |
| Sep 8, 7:44 PM EDT | Special Weather Statement | FFC | Cherokee, Dawson, Forsyth, Lumpkin | 46 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.