Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 294, NWS Atlanta, GA

July 18, 2012Gordon County, Murray County, Whitfield County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 18, 2012, 6:38 PM EDT for Gordon County, Murray County, Whitfield 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 18, 2012, 6:38 PM EDT (22:38 UTC)
Expired: Jul 18, 2012, 7:30 PM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Gordon County, GA, Murray County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 124 km from the middle of the area, began a volume at 22:39 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 18, 6:47 PM EDT	TSTM WND DMG	Chatsworth, GA	911 DISPATCHER REPORTED 12-16 TREES DOWN AROUND CHATSWORTH.

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 12:00Z, 10.6 hours before the alert went out and 144 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: 698 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 924 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 18 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, in the capitals the NWS used until 2016.

786 
WUUS52 KFFC 182238
SVRFFC
GAC129-213-313-182330-
/O.NEW.KFFC.SV.W.0294.120718T2238Z-120718T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
638 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GORDON COUNTY IN NORTHWEST GEORGIA
  SOUTHERN MURRAY COUNTY IN NORTHWEST GEORGIA
  SOUTHEASTERN WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 730 PM EDT

* AT 633 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
  CHATSWORTH...MOVING SOUTHEAST AT 5 MPH.

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

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 3451 8466 3453 8496 3485 8490 3485 8465
TIME...MOT...LOC 2238Z 334DEG 5KT 3475 8478

$$

2 follow-up statements

546 
WWUS52 KFFC 182308
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
708 PM EDT WED JUL 18 2012

GAC313-182318-
/O.CAN.KFFC.SV.W.0294.000000T0000Z-120718T2330Z/
WHITFIELD GA-
708 PM EDT WED JUL 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WHITFIELD COUNTY 
IS CANCELLED...

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 3451 8466 3455 8490 3471 8487 3472 8485
      3473 8487 3474 8485 3475 8486 3480 8486
      3480 8484 3481 8485 3485 8485 3485 8465
TIME...MOT...LOC 2308Z 334DEG 5KT 3471 8476

$$

GAC129-213-182330-
/O.CON.KFFC.SV.W.0294.000000T0000Z-120718T2330Z/
MURRAY GA-GORDON GA-
708 PM EDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHEASTERN GORDON AND SOUTHERN MURRAY COUNTIES...

AT 706 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. IN ADDITION...HEAVY RAINFALL 
WILL RESULT IN MINOR LOCALIZED FLOODING IN MAINLY THE NORMALLY PRONE 
AREAS. THIS STORM WAS LOCATED NEAR RAMHURST...MOVING SOUTHEAST AT 5 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
OAKMAN...AUDUBON...NICKELSVILLE AND CARTERS.

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 3451 8466 3455 8490 3471 8487 3472 8485
      3473 8487 3474 8485 3475 8486 3480 8486
      3480 8484 3481 8485 3485 8485 3485 8465
TIME...MOT...LOC 2308Z 334DEG 5KT 3471 8476

$$

366 
WWUS52 KFFC 182323
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
723 PM EDT WED JUL 18 2012

GAC129-213-182332-
/O.EXP.KFFC.SV.W.0294.000000T0000Z-120718T2330Z/
MURRAY GA-GORDON GA-
723 PM EDT WED JUL 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GORDON AND
SOUTHERN MURRAY COUNTIES EXPIRES AT 730 PM EDT...

ALTHOUGH THE SEVERE THREAT HAS GREATLY DIMINISHED...THERE MAY STILL 
BE LOCAL RISES IN CREEKS AND STREAMS.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
OAKMAN...AUDUBON...NICKELSVILLE AND CARTERS.

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 3451 8466 3455 8490 3471 8487 3472 8485
      3473 8487 3474 8485 3475 8486 3480 8486
      3480 8484 3481 8485 3485 8485 3485 8465
TIME...MOT...LOC 2322Z 334DEG 5KT 3469 8475

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 10:17 PM EDT	Special Weather Statement	FFC	Catoosa, Dade	43 min
Jul 17, 10:34 PM EDT	Special Weather Statement	FFC	Bartow, Gordon	41 min
Jul 17, 10:59 PM EDT	Special Weather Statement	FFC	Catoosa, Dade, Walker	61 min
Jul 17, 11:54 PM EDT	Special Weather Statement	FFC	Dade	36 min
Jul 18, 1:09 AM EDT	Special Weather Statement	FFC	Haralson, Polk	36 min
Jul 18, 2:16 PM EDT	Special Weather Statement	FFC	Dawson	44 min
Jul 18, 2:39 PM EDT	Special Weather Statement	FFC	Oconee	36 min
Jul 18, 3:01 PM EDT	Special Weather Statement	FFC	Lumpkin	29 min
Jul 18, 3:13 PM EDT	Special Weather Statement	FFC	White	32 min
Jul 18, 3:31 PM EDT	Special Weather Statement	FFC	Putnam	29 min
Jul 18, 3:36 PM EDT	Special Weather Statement	FFC	Hall	24 min
Jul 18, 3:38 PM EDT	Special Weather Statement	FFC	Lumpkin	52 min
Jul 18, 3:42 PM EDT	Special Weather Statement	FFC	Forsyth	48 min
Jul 18, 3:44 PM EDT	Special Weather Statement	FFC	Towns	31 min
Jul 18, 3:54 PM EDT	Special Weather Statement	FFC	Douglas	36 min
Jul 18, 4:02 PM EDT	Special Weather Statement	FFC	Jackson	28 min
Jul 18, 4:14 PM EDT	Special Weather Statement	FFC	Banks	31 min
Jul 18, 4:23 PM EDT	Special Weather Statement	FFC	Barrow	37 min
Jul 18, 4:33 PM EDT	Special Weather Statement	FFC	Gwinnett	42 min
Jul 18, 4:47 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett	43 min
Jul 18, 4:56 PM EDT	Special Weather Statement	FFC	Walker	49 min
Jul 18, 4:58 PM EDT	Special Weather Statement	FFC	DeKalb	32 min
Jul 18, 5:05 PM EDT	Special Weather Statement	FFC	Barrow	40 min
Jul 18, 5:18 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Oconee, Walton	42 min
Jul 18, 5:32 PM EDT	Special Weather Statement	FFC	Catoosa	28 min
Jul 18, 5:36 PM EDT	Severe Thunderstorm Warning	FFC	Newton, Walton	39 min
Jul 18, 5:47 PM EDT	Special Weather Statement	FFC	Henry	28 min
Jul 18, 5:50 PM EDT	Special Weather Statement	FFC	Jasper	25 min
Jul 18, 6:00 PM EDT	Special Weather Statement	FFC	Glascock	45 min
Jul 18, 6:06 PM EDT	Special Weather Statement	FFC	Gordon	39 min
Jul 18, 6:13 PM EDT	Special Weather Statement	FFC	Haralson	32 min
Jul 18, 6:24 PM EDT	Special Weather Statement	FFC	Jasper	36 min
Jul 18, 6:25 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Morgan, Newton	50 min
Jul 18, 6:27 PM EDT	Special Weather Statement	FFC	Gordon	48 min
Jul 18, 6:52 PM EDT	Special Weather Statement	FFC	Lamar, Pike	38 min
Jul 18, 6:55 PM EDT	Special Weather Statement	FFC	Paulding	50 min
Jul 18, 6:56 PM EDT	Special Weather Statement	FFC	Haralson	49 min
Jul 18, 7:13 PM EDT	Special Weather Statement	FFC	Pickens	47 min
Jul 18, 7:20 PM EDT	Special Weather Statement	FFC	Putnam	25 min
Jul 18, 7:22 PM EDT	Special Weather Statement	FFC	Murray	68 min
Jul 18, 7:31 PM EDT	Special Weather Statement	FFC	Bartow	44 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.