Alert archive / Georgia / Special Weather Statements in 2021
Special Weather Statement, NWS Atlanta, GA
NWS Atlanta, GA issued this special weather statement at Sep 8, 2021, 12:37 AM EDT for Forsyth County, Georgia. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2021, 12:37 AM EDT (04:37 UTC)
- Expired
- Sep 8, 2021, 1:00 AM EDT
- In force
- 23 min
- Issued by
- NWS Atlanta, GA
- Hail
- 0.00 in
- Wind
- 30
County Forsyth County, GA
The radar
The Atlanta radar (KFFC), 96 km from the middle of the area, began a volume at 04:39 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, 4.6 hours before the alert went out and 92 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
- 2587 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 936 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
323
WWUS82 KFFC 080437
SPSFFC
Special Weather Statement
National Weather Service Peachtree City GA
1237 AM EDT Wed Sep 8 2021
GAZ022-023-033-034-080500-
Hall GA-North Fulton GA-Forsyth GA-Gwinnett GA-
1237 AM EDT Wed Sep 8 2021
...A strong thunderstorm will impact portions of central Forsyth,
northern Gwinnett, southwestern Hall and northeastern Fulton Counties
through 100 AM EDT...
At 1237 AM EDT, a strong thunderstorm was over Johns Creek, or 11
miles northwest of Lawrenceville, moving northeast at 20 mph.
HAZARD...Frequent cloud to ground lightning and heavy rain.
SOURCE...Radar indicated.
IMPACT...Lightning is one of nature's leading killers. If you can
hear thunder, you are close enough to be struck by
lightning. Heavy rain may cause temporary street flooding
especially in poor drainage areas.
Locations impacted include...
Lawrenceville, Cumming, Roswell, Johns Creek, Alpharetta, Duluth,
Sugar Hill, Suwanee, Buford, Norcross, Braselton, Flowery Branch,
Berkeley Lake, Rest Haven, Buford Dam-Lake Lanier Parks, Coal
Mountain, Brookwood, Aqualand Park, Lake Lanier Islands and Hog
Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
People outdoors should seek shelter immediately. Electrical
appliances should not be used unless in an emergency. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.
&&
LAT...LON 3413 8382 3406 8385 3390 8418 3402 8432
3432 8411
TIME...MOT...LOC 0437Z 228DEG 19KT 3403 8417
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH
$$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, 12:55 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, 6:16 PM EDT | Flash Flood Warning | FFC | Barrow, Forsyth, Fulton, Gwinnett, Hall, Jackson | 6 hr |
| 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
Special Weather Statements in Georgia, 2021Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.