Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Atlanta, GA

March 1, 20214 counties in Georgia

NWS Atlanta, GA issued this special weather statement at Mar 1, 2021, 4:39 AM EST for 4 counties in Georgia. It was in force for 36 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 1, 2021, 4:39 AM EST (09:39 UTC)
Expired: Mar 1, 2021, 5:15 AM EST
In force: 36 min
Issued by: NWS Atlanta, GA
Wind: 40

Counties Cherokee County, GA, Haralson County, GA, Paulding County, GA, Polk County, GA

The radar

The Atlanta radar (KFFC), 82 km from the middle of the area, began a volume at 09:41 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, 9.7 hours before the alert went out and 81 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: 53 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1337 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

772 
WWUS82 KFFC 010939
SPSFFC

Special Weather Statement
National Weather Service Peachtree City GA
439 AM EST Mon Mar 1 2021
 
GAZ020-021-030>032-041-042-011015-
Polk GA-Cobb GA-Cherokee GA-Haralson GA-Bartow GA-Carroll GA-
Paulding GA-
439 AM EST Mon Mar 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR POLK...NORTHERN COBB...
CHEROKEE...HARALSON...SOUTHEASTERN BARTOW...NORTHWESTERN CARROLL AND
PAULDING COUNTIES UNTIL 515 AM EST...

At 439 AM EST...a line of strong thunderstorms was along a line
extending from near Ball Ground to near Mars Hills...and moving east
at 40 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 these storms include
Marietta, Canton, Cartersville, Dallas, Buchanan, Roswell, Kennesaw,
Woodstock, Acworth, Powder Springs, Holly Springs, Bremen, Temple,
Rockmart, Euharlee, Hiram, Tallapoosa, Mount Zion, Emerson and
Aragon.

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 3429 8463 3429 8426 3419 8426 3417 8435
      3413 8436 3411 8442 3405 8441 3356 8532
      3389 8539
TIME...MOT...LOC 0939Z 274DEG 35KT 3433 8444 3386 8533 

WIND...40MPH

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 1, 12:40 AM EST	Special Weather Statement	FFC	Catoosa, Dade, Walker	50 min
Mar 1, 5:09 AM EST	Special Weather Statement	FFC	Carroll, Cobb, Douglas, Forsyth, Fulton	51 min
Mar 1, 5:47 AM EST	Special Weather Statement	FFC	Clayton, Coweta, DeKalb, Fayette, Fulton, Gwinnett and 3 more	43 min
Mar 1, 6:25 AM EST	Special Weather Statement	FFC	Butts, Fayette, Henry, Meriwether, Pike, Spalding	35 min
Mar 1, 7:52 AM EST	Special Weather Statement	FFC	Warren	38 min
Mar 1, 8:28 AM EST	Special Weather Statement	FFC	Twiggs, Wilkinson	32 min
Mar 1, 8:29 AM EST	Special Weather Statement	FFC	Glascock, Jefferson, Washington	31 min
Mar 1, 10:35 AM EST	Special Weather Statement	FFC	Wilcox	25 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.