Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

July 30, 2021Cobb County, Fulton County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 30, 2021, 7:02 PM EDT for Cobb County, Fulton County, Georgia. It was in force for 28 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 30, 2021, 7:02 PM EDT (23:02 UTC)
Expired: Jul 30, 2021, 7:30 PM EDT
In force: 28 min
Issued by: NWS Atlanta, GA
Wind: 40

Counties Cobb County, GA, Fulton County, GA

The radar

The Atlanta radar (KFFC), 65 km from the middle of the area, began a volume at 23:02 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, 11.0 hours before the alert went out and 64 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: 1065 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1141 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

829 
WWUS82 KFFC 302302
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
702 PM EDT Fri Jul 30 2021
 
GAZ032-033-044-302330-
North Fulton GA-Cobb GA-South Fulton GA-
702 PM EDT Fri Jul 30 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH FULTON...COBB AND NORTHERN
SOUTH FULTON COUNTIES UNTIL 730 PM EDT...

At 702 PM EDT...a strong thunderstorm was over Fair Oaks, or over
Marietta...moving southeast at 15 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning 
           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, Marietta, Sandy Springs, Smyrna, Kennesaw, Acworth, Powder
Springs, Austell, Fair Oaks, White Water Park, Lost Mountain Park,
Kennesaw State University, Vinings, Jim R Miller Park, Bankhead, Six
Flags Over Georgia, Cascade Heights, Due West, Sandy Plains and
Bolton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3408 8458 3408 8454 3386 8435 3384 8435
      3367 8450 3396 8474 3401 8474
TIME...MOT...LOC 2302Z 323DEG 15KT 3393 8459 

WIND...40MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 2:50 PM EDT	Heat Advisory	FFC	Baldwin, Barrow, Bibb, Bleckley, Butts, Chattahoochee and 61 more	29 hr
Jul 30, 4:32 PM EDT	Special Weather Statement	FFC	Catoosa, Murray, Whitfield	28 min
Jul 30, 4:39 PM EDT	Severe Thunderstorm Warning	FFC	Murray, Whitfield	36 min
Jul 30, 4:45 PM EDT	Special Weather Statement	FFC	Cherokee	30 min
Jul 30, 5:15 PM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Gordon, Murray	30 min
Jul 30, 5:18 PM EDT	Special Weather Statement	FFC	Cherokee	27 min
Jul 30, 6:10 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	35 min
Jul 30, 6:20 PM EDT	Special Weather Statement	FFC	Bartow	25 min
Jul 30, 6:49 PM EDT	Special Weather Statement	FFC	Bartow	26 min
Jul 30, 7:17 PM EDT	Special Weather Statement	FFC	Bartow, Paulding	28 min
Jul 30, 7:40 PM EDT	Special Weather Statement	FFC	Dade	35 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.