Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 333, NWS Atlanta, GA

August 10, 2012Bartow County, Cherokee County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 10, 2012, 9:18 PM EDT for Bartow County, Cherokee County, Georgia. It was in force for 42 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 10, 2012, 9:18 PM EDT (01:18 UTC)
Expired: Aug 10, 2012, 10:00 PM EDT
In force: 42 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bartow County, GA, Cherokee County, GA

The radar

The Atlanta radar (KFFC), 108 km from the middle of the area, began a volume at 01:20 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.

What was reported inside it

Time	Report	Where	Remark
Aug 10, 9:25 PM EDT	TSTM WND DMG	6 Ne Cartersville, GA	SEVERAL TREES BLOWN DOWN ALONG AND NEAR GEORGIA HIGHWAY 20.
Aug 10, 9:35 PM EDT	TSTM WND DMG	8 W Canton, GA	SEVERAL TREES AND POWER LINES BLOWN DOWN ALONG AND NEAR GEORGIA HIGHWAY 20.
Aug 10, 9:45 PM EDT	TSTM WND DMG	1 E Ball Ground, GA	A TREE BLOWN DOWN NEAR GEORGIA HIGHWAY 20.
Aug 10, 9:50 PM EDT	TSTM WND DMG	2 E Canton, GA	A TREE WAS BLOWN DOWN NEAR GEORGIA HIGHWAY 20.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.3 hours before the alert went out and 107 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: 1442 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

757 
WUUS52 KFFC 110118
SVRFFC
GAC015-057-110200-
/O.NEW.KFFC.SV.W.0333.120811T0118Z-120811T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
918 PM EDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN BARTOW COUNTY IN NORTHWEST GEORGIA

* UNTIL 1000 PM EDT

* AT 916 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR WHITE...MOVING EAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WALESKA...HOLLY SPRINGS...CANTON...BUFFINGTON...BALL GROUND AND
  FREE HOME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...EXCESSIVE CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE 
ENOUGH TO BE STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3441 8464 3441 8459 3438 8458 3438 8445
      3439 8443 3437 8440 3438 8426 3419 8426
      3417 8435 3412 8436 3414 8483 3440 8478
      3440 8474 3442 8473
TIME...MOT...LOC 0118Z 275DEG 20KT 3427 8465

$$

16

1 follow-up statement

232 
WWUS52 KFFC 110147
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
947 PM EDT FRI AUG 10 2012

GAC015-110156-
/O.CAN.KFFC.SV.W.0333.000000T0000Z-120811T0200Z/
BARTOW GA-
947 PM EDT FRI AUG 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BARTOW COUNTY IS
CANCELLED...

THE STORM HAS EXITED BARTOW COUNTY.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

LAT...LON 3438 8458 3438 8445 3439 8443 3437 8440
      3438 8426 3419 8426 3419 8433 3417 8435
      3412 8436 3413 8466 3441 8465 3441 8459
TIME...MOT...LOC 0146Z 275DEG 20KT 3430 8441

$$

GAC057-110200-
/O.CON.KFFC.SV.W.0333.000000T0000Z-120811T0200Z/
CHEROKEE GA-
947 PM EDT FRI AUG 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR CHEROKEE COUNTY...

AT 942 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. THIS STORM WAS LOCATED NEAR BALL GROUND...MOVING EAST AT
25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO UNION
HILL...REAVIS MOUNTAIN...FREE HOME...HOLBROOK AND LATHEMTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

IF YOU SEE WIND DAMAGE...HAIL OR FLOODING...WAIT UNTIL THE STORM HAS
PASSED...AND THEN CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1 8
6 6 7 6 3 4 4 6 6. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3438 8458 3438 8445 3439 8443 3437 8440
      3438 8426 3419 8426 3419 8433 3417 8435
      3412 8436 3413 8466 3441 8465 3441 8459
TIME...MOT...LOC 0146Z 275DEG 20KT 3430 8441

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 8:54 PM EDT	Special Weather Statement	FFC	Bartow	36 min
Aug 10, 9:27 PM EDT	Special Weather Statement	FFC	Hall	33 min
Aug 10, 9:29 PM EDT	Special Weather Statement	FFC	Forsyth	31 min
Aug 10, 9:44 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Forsyth	46 min
Aug 10, 9:58 PM EDT	Special Weather Statement	FFC	Hall	32 min
Aug 10, 11:37 PM EDT	Special Weather Statement	FFC	Carroll, Heard	23 min
Aug 11, 1:52 AM EDT	Special Weather Statement	FFC	Forsyth, Gwinnett	38 min
Aug 11, 2:53 AM EDT	Special Weather Statement	FFC	Barrow, Gwinnett	37 min
Aug 11, 2:55 AM EDT	Special Weather Statement	FFC	Fannin, Union	50 min
Aug 11, 5:03 AM EDT	Special Weather Statement	FFC	Chattahoochee, Marion	42 min
Aug 11, 6:34 AM EDT	Special Weather Statement	FFC	Schley, Sumter	41 min
Aug 11, 1:58 PM EDT	Special Weather Statement	FFC	Bibb, Crawford, Peach	32 min
Aug 11, 2:52 PM EDT	Special Weather Statement	FFC	Warren	8 min
Aug 11, 4:46 PM EDT	Special Weather Statement	FFC	Emanuel	29 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.