Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 134, NWS Atlanta, GA

May 29, 2012Chattooga County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 29, 2012, 10:06 PM EDT for Chattooga County, Georgia. It was in force for 24 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: May 29, 2012, 10:06 PM EDT (02:06 UTC)
Expired: May 29, 2012, 10:30 PM EDT
In force: 24 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Chattooga County, GA

The radar

The Northeast Alabama radar (KHTX), 89 km from the middle of the area, began a volume at 02:08 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
May 29, 10:20 PM EDT	TSTM WND DMG	Lyerly, GA	CHATTOOGA COUNTY 911 RELAYED REPORTS OF SEVERAL DOWNED TREES AND LINES IN THE LYERLY AREA. RADAR ESTIMATED TIME OF 2220 EDT.

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, 2.1 hours before the alert went out and 140 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: 341 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1320 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -15 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.

266 
WUUS52 KFFC 300206
SVRFFC
GAC055-300230-
/O.NEW.KFFC.SV.W.0134.120530T0206Z-120530T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1006 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHATTOOGA COUNTY IN NORTHWEST GEORGIA

* UNTIL 1030 PM EDT

* AT 1000 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED SEVERE 
  THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND DAMAGING 
  WINDS UP TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING 
  FROM NORTHWEST THROUGH SOUTHWEST OF SUMMERVILLE...MOVING SOUTHEAST AT 
  25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LYERLY...CHATTOOGAVILLE...BERRYTON...HOLLAND...JAMES H. FLOYD STATE
  PARK AND TIDINGS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

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 3459 8539 3448 8520 3445 8517 3444 8518
      3442 8524 3440 8525 3438 8533 3434 8537
      3430 8538 3428 8539 3429 8547 3459 8553
TIME...MOT...LOC 0205Z 307DEG 21KT 3454 8545 3444 8547
          3436 8554

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 9:03 PM EDT	Special Weather Statement	FFC	Catoosa, Dade	42 min
May 29, 9:23 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker	37 min
May 29, 9:58 PM EDT	Special Weather Statement	FFC	Catoosa, Chattooga, Gordon, Murray, Walker, Whitfield	62 min
May 29, 10:22 PM EDT	Severe Thunderstorm Warning	FFC	Floyd	23 min
May 29, 10:43 PM EDT	Special Weather Statement	FFC	Chattooga, Fannin, Floyd, Gilmer, Gordon, Murray and 3 more	47 min
May 29, 10:59 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd	31 min
May 29, 11:19 PM EDT	Special Weather Statement	FFC	Cherokee, Fannin, Gilmer, Pickens, Union	41 min
May 29, 11:29 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Paulding	46 min
May 29, 11:50 PM EDT	Special Weather Statement	FFC	Carroll, Cobb, Douglas, Haralson, Paulding	40 min
May 30, 12:02 AM EDT	Special Weather Statement	FFC	Cherokee, Cobb, Dawson, Forsyth, Lumpkin, Towns and 2 more	28 min
May 30, 12:20 AM EDT	Special Weather Statement	FFC	Clayton, Coweta, DeKalb, Fayette, Forsyth, Fulton and 3 more	40 min
May 30, 12:58 AM EDT	Special Weather Statement	FFC	Clayton, Coweta, Fayette, Heard, Meriwether, Pike and 2 more	62 min
May 30, 1:47 AM EDT	Special Weather Statement	FFC	Harris, Lamar, Monroe, Muscogee, Talbot, Upson	58 min
May 30, 2:17 AM EDT	Special Weather Statement	FFC	Chattahoochee, Crawford, Macon, Marion, Muscogee, Peach and 5 more	43 min
May 30, 6:42 PM EDT	Special Weather Statement	FFC	Twiggs	33 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.