Alert archive / Georgia / Special Weather Statements in 2021
Special Weather Statement, NWS Atlanta, GA
NWS Atlanta, GA issued this special weather statement at Jul 21, 2021, 9:49 PM EDT for Gwinnett County, Georgia. It was in force for 41 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
- Jul 21, 2021, 9:49 PM EDT (01:49 UTC)
- Expired
- Jul 21, 2021, 10:30 PM EDT
- In force
- 41 min
- Issued by
- NWS Atlanta, GA
County Gwinnett County, GA
The radar
The Atlanta radar (KFFC), 84 km from the middle of the area, began a volume at 01:49 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, 1.8 hours before the alert went out and 79 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
- 460 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 951 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
191
WWUS82 KFFC 220149
SPSFFC
Special Weather Statement
National Weather Service Peachtree City GA
949 PM EDT Wed Jul 21 2021
GAZ034-047-220230-
Walton GA-Gwinnett GA-
949 PM EDT Wed Jul 21 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WALTON AND
SOUTHEASTERN GWINNETT COUNTIES UNTIL 1030 PM EDT...
At 948 PM EDT...a strong thunderstorm was over Loganville, or 8 miles
southeast of Lawrenceville...moving southeast at 5 mph.
HAZARD...Heavy rain.
IMPACT...Heavy rain may cause temporary street flooding especially
in poor drainage areas.
Some locations in the path of this storm include
Lawrenceville, Monroe, Snellville, Loganville, Dacula, Grayson,
Between, Bold Springs, Windsor, Harbin and Rosebud.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should slow down and be prepared for possible loss of
control due to hydroplaning.
LAT...LON 3399 8389 3382 8371 3377 8396 3379 8399
3400 8408
TIME...MOT...LOC 0148Z 324DEG 5KT 3385 8391
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:21 PM EDT | Flash Flood Warning | FFC | Gwinnett, Walton | 6 hr |
| Jul 22, 12:29 AM EDT | River Flood Warning | FFC | Gwinnett | 107 min |
| Jul 22, 4:24 PM EDT | Special Weather Statement | FFC | Crisp | 36 min |
| Jul 22, 5:50 PM EDT | Special Weather Statement | FFC | Macon | 25 min |
| Jul 22, 5:59 PM EDT | Special Weather Statement | FFC | Bleckley | 31 min |
| Jul 22, 6:05 PM EDT | Special Weather Statement | FFC | Marion, Schley | 25 min |
| Jul 22, 7:06 PM EDT | Special Weather Statement | FFC | Stewart | 24 min |
| Jul 22, 7:44 PM EDT | Flash Flood Warning | FFC | Stewart | 3 hr |
| Jul 22, 7:57 PM EDT | Special Weather Statement | FFC | Washington | 33 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.