Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

March 31, 2021Gwinnett County, Georgia

NWS Atlanta, GA issued this special weather statement at Mar 31, 2021, 9:38 AM EDT for Gwinnett County, Georgia. It was in force for 37 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: Mar 31, 2021, 9:38 AM EDT (13:38 UTC)
Expired: Mar 31, 2021, 10:15 AM EDT
In force: 37 min
Issued by: NWS Atlanta, GA
Wind: 40

County Gwinnett County, GA

The radar

The Atlanta radar (KFFC), 65 km from the middle of the area, began a volume at 13:38 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 12:00Z, 1.6 hours before the alert went out and 62 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 111 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 205 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

533 
WWUS82 KFFC 311338
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
938 AM EDT Wed Mar 31 2021
 
GAZ033-034-045>047-311415-
North Fulton GA-Walton GA-Rockdale GA-DeKalb GA-Gwinnett GA-
938 AM EDT Wed Mar 31 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON...WESTERN WALTON...
NORTHEASTERN ROCKDALE...NORTHERN DEKALB AND SOUTHERN GWINNETT
COUNTIES UNTIL 1015 AM EDT...

At 937 AM EDT...a strong thunderstorm was over Doraville, or 8 miles
north of Decatur...moving east at 30 mph.

  HAZARD...Winds up to 40 mph and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of 
           light...unsecured objects. Heavy rain may cause temporary 
           street flooding especially in poor drainage areas.

Some locations in the path of this storm include
Atlanta, Lawrenceville, Sandy Springs, Dunwoody, Snellville, Lilburn,
Loganville, Chamblee, Norcross, Doraville, Clarkston, Stone Mountain,
Dacula, Grayson, Berkeley Lake, Pine Lake, Tucker, North Decatur,
North Atlanta and North Druid Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. Motorists should
slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3381 8440 3387 8435 3395 8435 3397 8427
      3399 8389 3372 8393
TIME...MOT...LOC 1337Z 276DEG 26KT 3390 8428 

WIND...40MPH

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 7:04 AM EDT	Special Weather Statement	FFC	Catoosa, Chattooga, Dade, Walker	41 min
Mar 31, 7:46 AM EDT	Flash Flood Warning	FFC	Catoosa, Dade, Walker	5 hr
Mar 31, 8:16 AM EDT	Flash Flood Warning	FFC	Bartow, Chattooga, Fannin, Floyd, Gilmer, Gordon and 7 more	6 hr
Mar 31, 8:19 AM EDT	Special Weather Statement	FFC	Paulding	26 min
Mar 31, 9:07 AM EDT	River Flood Warning	FFC	Dade	29 hr
Mar 31, 9:08 AM EDT	River Flood Warning	FFC	Whitfield	5 hr
Mar 31, 9:09 AM EDT	Special Weather Statement	FFC	Cobb, Douglas, Fulton	36 min
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Chattooga	27 hr
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Floyd	45 hr
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Gordon, Murray, Whitfield	4 days
Mar 31, 9:15 AM EDT	River Flood Warning	FFC	Floyd, Gordon	4 days
Mar 31, 9:23 AM EDT	River Flood Warning	FFC	Catoosa	49 hr
Mar 31, 9:44 AM EDT	River Flood Warning	FFC	Whitfield	71 hr
Mar 31, 9:53 AM EDT	Special Weather Statement	FFC	Douglas, Fulton	22 min
Mar 31, 9:54 AM EDT	River Flood Warning	FFC	Murray, Whitfield	44 hr
Mar 31, 11:26 AM EDT	Special Weather Statement	FFC	Haralson, Paulding	34 min
Mar 31, 11:58 AM EDT	Special Weather Statement	FFC	Carroll, Cobb, Douglas	32 min
Mar 31, 1:12 PM EDT	Special Weather Statement	FFC	Fayette	33 min
Mar 31, 1:31 PM EDT	River Flood Warning	FFC	Cobb	21 days
Mar 31, 2:00 PM EDT	River Flood Warning	FFC	Catoosa	19 hr
Mar 31, 2:21 PM EDT	River Flood Warning	FFC	Forsyth, Fulton	21 hr
Mar 31, 3:00 PM EDT	Special Weather Statement	FFC	Oglethorpe	30 min
Mar 31, 3:03 PM EDT	Special Weather Statement	FFC	Greene	27 min
Mar 31, 3:44 PM EDT	Special Weather Statement	FFC	Chattahoochee, Marion, Stewart	31 min
Mar 31, 3:59 PM EDT	Special Weather Statement	FFC	Wilkes	31 min
Mar 31, 4:22 PM EDT	Freeze Watch	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 44 more	11 hr
Mar 31, 4:22 PM EDT	Wind Advisory	FFC	Banks, Barrow, Bartow, Bibb, Butts, Carroll and 64 more	27 hr
Mar 31, 5:08 PM EDT	Special Weather Statement	FFC	Bleckley, Dooly, Houston, Pulaski, Twiggs, Wilkinson	37 min
Mar 31, 5:23 PM EDT	Special Weather Statement	FFC	Glascock, Washington	37 min
Mar 31, 5:35 PM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Pulaski, Wilcox	25 min
Mar 31, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	31 min
Mar 31, 6:05 PM EDT	Special Weather Statement	FFC	Emanuel, Treutlen, Wheeler	25 min
Mar 31, 6:22 PM EDT	River Flood Warning	FFC	Murray	7 hr
Mar 31, 6:30 PM EDT	Special Weather Statement	FFC	Emanuel, Montgomery, Telfair, Treutlen, Wheeler	30 min
Mar 31, 7:00 PM EDT	Special Weather Statement	FFC	Emanuel, Montgomery, Telfair, Toombs	30 min

Nearby

Special Weather Statements in Georgia, 2021 Every 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.