Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 249, NWS Atlanta, GA

July 6, 2012Harris County, Troup County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 6, 2012, 10:53 PM EDT for Harris County, Troup County, Georgia. It was in force for 52 min. 1 report 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: Jul 6, 2012, 10:53 PM EDT (02:53 UTC)
Expired: Jul 6, 2012, 11:45 PM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Harris County, GA, Troup County, GA

The radar

The Atlanta radar (KFFC), 71 km from the middle of the area, began a volume at 02:53 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
Jul 6, 11:16 PM EDT	HAIL 1.75	2 Nne Lagrange, GA	THE PUBLIC REPORTED GOLF BALL SIZED HAIL ON CHASE ROAD.

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, 2.9 hours before the alert went out and 76 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: 366 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 2130 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 93 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.

086 
WUUS52 KFFC 070253
SVRFFC
GAC145-285-070345-
/O.NEW.KFFC.SV.W.0249.120707T0253Z-120707T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1053 PM EDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN HARRIS COUNTY IN WEST CENTRAL GEORGIA
  SOUTHERN TROUP COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 1145 PM EDT

* AT 1049 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR
  LAGRANGE...MOVING SOUTHWEST AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST
  POINT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3310 8503 3300 8489 3278 8514 3278 8515
      3283 8518 3284 8516 3285 8518 3287 8519
      3302 8522
TIME...MOT...LOC 0254Z 049DEG 7KT 3303 8501

$$

1 follow-up statement

456 
WWUS52 KFFC 070311
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1111 PM EDT FRI JUL 6 2012

GAC145-285-070345-
/O.CON.KFFC.SV.W.0249.000000T0000Z-120707T0345Z/
TROUP GA-HARRIS GA-
1111 PM EDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR NORTHWESTERN HARRIS AND SOUTHWESTERN TROUP COUNTIES...

AT 1107 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
LAGRANGE...MOVING SOUTHWEST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SMITHS
CROSSROAD...BAUGHS CROSSROADS...CANNONVILLE...STATE LINE PARK...LONG
CANE...PIEDMONT HEIGHTS AND WEST POINT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3310 8503 3295 8494 3278 8514 3278 8515
      3283 8518 3284 8516 3285 8518 3287 8519
      3302 8522
TIME...MOT...LOC 0311Z 049DEG 7KT 3301 8504

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:06 PM EDT	Special Weather Statement	FFC	Floyd	24 min
Jul 6, 8:07 PM EDT	Special Weather Statement	FFC	Paulding	23 min
Jul 6, 8:16 PM EDT	Severe Thunderstorm Warning	FFC	Floyd	44 min
Jul 6, 8:34 PM EDT	Special Weather Statement	FFC	Coweta	41 min
Jul 6, 8:35 PM EDT	Special Weather Statement	FFC	Cobb	25 min
Jul 6, 8:49 PM EDT	Special Weather Statement	FFC	Crawford	41 min
Jul 6, 8:56 PM EDT	Special Weather Statement	FFC	Polk	34 min
Jul 6, 9:03 PM EDT	Special Weather Statement	FFC	Meriwether	42 min
Jul 6, 9:53 PM EDT	Special Weather Statement	FFC	Heard	52 min
Jul 6, 10:51 PM EDT	Special Weather Statement	FFC	Troup	39 min
Jul 6, 11:52 PM EDT	Special Weather Statement	FFC	Muscogee	38 min
Jul 7, 2:09 AM EDT	Special Weather Statement	FFC	Macon	36 min
Jul 7, 2:53 AM EDT	Special Weather Statement	FFC	Marion, Schley	52 min
Jul 7, 5:29 PM EDT	Special Weather Statement	FFC	Barrow	31 min
Jul 7, 5:58 PM EDT	Special Weather Statement	FFC	Gwinnett	32 min
Jul 7, 6:26 PM EDT	Special Weather Statement	FFC	Cherokee	34 min
Jul 7, 6:36 PM EDT	Special Weather Statement	FFC	Floyd	24 min
Jul 7, 7:00 PM EDT	Special Weather Statement	FFC	Pickens	30 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.