Alert archive / Georgia / Flash Flood Warnings in 2017
Flash Flood Warning 39, NWS Atlanta, GA
NWS Atlanta, GA issued this flash flood warning at Aug 9, 2017, 6:05 AM EDT for DeKalb County, Fulton County, Gwinnett County, Georgia. It was in force for 6 hr. 5 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
- Aug 9, 2017, 6:05 AM EDT (10:05 UTC)
- Expired
- Aug 9, 2017, 12:00 PM EDT
- In force
- 6 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- None
Counties DeKalb County, GA, Fulton County, GA, Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 71 km from the middle of the area, began a volume at 10:05 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 |
|---|---|---|---|
| Aug 9, 7:15 AM EDT | HEAVY RAIN 3.24 | 3 Nw Clarkston, GA | COCORAHS STATION GA-DK-7, NORTH DECATUR 3.0 NNE. ENDING 8 AM. |
| Aug 9, 7:30 AM EDT | HEAVY RAIN 4.02 | 1 Sse Dunwoody, GA | COCORAHS STATION GA-DK-36, 1 SSE DUNWOODY. ENDING 8 AM |
| Aug 9, 8:19 AM EDT | HEAVY RAIN 4.32 | 2 E Tucker, GA | MESONET STATION F0560, 2 E TUCKER. |
| Aug 9, 9:45 AM EDT | FLASH FLOOD | Windsor At Peachtree, GA | MEDIA REPORTED THAT THE WINDSOR PKWY BRIDGE OVER NANCY CREEK HAD SEVERAL FEET OF WATER OVER IT DURING PEAK FLOODING ON WEDNESDAY |
| Aug 9, 11:15 AM EDT | FLASH FLOOD | 1 S East Conway Hill, GA | A PROPERTY ON NORTHSIDE DRIVE WAS INUNDATED WITH FLOOD WATERS FROM THE ADJACENT NANCY CREEK. THE WATER WAS RAPIDLY MOVING ACROSS THEIR ENTIRE FRONT YARD AND DRIVEWAY... CUTTING OFF ALL SAFE INGRESS AND EGRESS FROM THE PROPERTY. |
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 00:00Z, 10.1 hours before the alert went out and 67 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
- 295 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted.
574
WGUS52 KFFC 091005
FFWFFC
GAC089-121-135-091600-
/O.NEW.KFFC.FF.W.0039.170809T1005Z-170809T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
605 AM EDT WED AUG 9 2017
The National Weather Service in Peachtree City has issued a
* Flash Flood Warning for...
Northern DeKalb County in north central Georgia...
Southwestern Gwinnett County in north central Georgia...
East central Fulton County in north central Georgia...
* Until noon EDT
* At 603 AM EDT, Doppler radar indicated heavy rain across the
warned area. One to two inches of rain have already fallen in the
past one to two hours. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Atlanta, Lawrenceville, Sandy Springs, Roswell, Dunwoody, Duluth,
Snellville, Lilburn, Chamblee, Norcross, Doraville, Clarkston,
Stone Mountain, Berkeley Lake, Pine Lake, Tucker, North Decatur,
North Atlanta, North Druid Hills and Druid Hills.
Additional rainfall amounts of one to two inches are possible in the
warned area.
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 3400 8405 3386 8401 3375 8407 3382 8440
3394 8440 3403 8434
$$1 follow-up statement
152
WGUS72 KFFC 091553
FFSFFC
Flash Flood Statement
National Weather Service Peachtree City GA
1153 AM EDT WED AUG 9 2017
GAC089-121-135-091603-
/O.EXP.KFFC.FF.W.0039.000000T0000Z-170809T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DeKalb GA-Gwinnett GA-Fulton GA-
1153 AM EDT WED AUG 9 2017
...THE FLASH FLOOD WARNING FOR NORTHERN DEKALB...SOUTHWESTERN
GWINNETT AND EAST CENTRAL FULTON COUNTIES WILL EXPIRE AT NOON EDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3400 8405 3386 8401 3375 8407 3382 8440
3394 8440 3403 8434
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 5:16 AM EDT | Special Weather Statement | FFC | DeKalb, Fulton, Gwinnett | 59 min |
| Aug 9, 5:19 AM EDT | Special Weather Statement | FFC | Hancock, Putnam, Taliaferro, Warren | 56 min |
| Aug 9, 6:11 AM EDT | Special Weather Statement | FFC | Hancock | 64 min |
| Aug 9, 7:08 AM EDT | Special Weather Statement | FFC | Baldwin, Hancock, Putnam, Warren | 67 min |
| Aug 9, 7:12 AM EDT | River Flood Warning | FFC | DeKalb, Fulton | 24 hr |
| Aug 9, 7:20 AM EDT | Special Weather Statement | FFC | Rockdale | 55 min |
| Aug 9, 7:36 AM EDT | Flash Flood Warning | FFC | Baldwin, Hancock | 6 hr |
| Aug 9, 9:25 AM EDT | River Flood Warning | FFC | DeKalb, Fulton | 24 hr |
| Aug 9, 9:36 AM EDT | Special Weather Statement | FFC | Washington | 54 min |
| Aug 9, 9:43 AM EDT | River Flood Warning | FFC | Fulton, Gwinnett | 24 hr |
| Aug 9, 10:12 AM EDT | Special Weather Statement | FFC | Wilkinson | 48 min |
| Aug 9, 11:03 AM EDT | Special Weather Statement | FFC | Twiggs, Wilkinson | 42 min |
| Aug 9, 12:49 PM EDT | Special Weather Statement | FFC | Emanuel, Treutlen | 26 min |
| Aug 9, 1:03 PM EDT | Severe Thunderstorm Warning | FFC | Emanuel | 27 min |
| Aug 9, 1:22 PM EDT | Special Weather Statement | FFC | Dodge, Emanuel, Laurens, Treutlen | 23 min |
| Aug 9, 1:50 PM EDT | Special Weather Statement | FFC | Dodge, Emanuel, Laurens, Treutlen | 25 min |
| Aug 9, 4:59 PM EDT | Special Weather Statement | FFC | Chattahoochee | 31 min |
| Aug 9, 5:41 PM EDT | Special Weather Statement | FFC | Stewart, Sumter, Webster | 34 min |
| Aug 9, 5:44 PM EDT | Special Weather Statement | FFC | Harris, Troup | 31 min |
| Aug 9, 7:05 PM EDT | Special Weather Statement | FFC | Troup | 25 min |
Nearby
Flash Flood Warnings in Georgia, 2017Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.