Alert archive / Georgia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 50, NWS Atlanta, GA

March 18, 201311 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 18, 2013, 6:08 PM EDT for 11 counties in Georgia. It was in force for 52 min. 2 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: Mar 18, 2013, 6:08 PM EDT (22:08 UTC)
Expired: Mar 18, 2013, 7:00 PM EDT
In force: 52 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bartow County, GA, Cherokee County, GA, Dawson County, GA, Fannin County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Whitfield County, GA

The radar

The Atlanta radar (KFFC), 125 km from the middle of the area, began a volume at 22:08 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
Mar 18, 6:12 PM EDT	TSTM WND DMG	Woodstock, GA	A FEW TREES WERE BLOWN DOWN OR SNAPPED IN THE WOODSTOCK AREA.
Mar 18, 6:25 PM EDT	HAIL 1	Dawsonville, GA

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 18, 2:31 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.1 hours before the alert went out and 123 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: 3 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 540 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 153 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.

346 
WUUS52 KFFC 182208
SVRFFC
GAC015-057-085-111-117-123-129-187-213-227-313-182300-
/O.NEW.KFFC.SV.W.0050.130318T2208Z-130318T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
608 PM EDT MON MAR 18 2013

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN FANNIN COUNTY IN NORTH CENTRAL GEORGIA
  FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
  GILMER COUNTY IN NORTH CENTRAL GEORGIA
  LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA
  PICKENS COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN BARTOW COUNTY IN NORTHWEST GEORGIA
  EASTERN GORDON COUNTY IN NORTHWEST GEORGIA
  SOUTHERN MURRAY COUNTY IN NORTHWEST GEORGIA
  CENTRAL WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 700 PM EDT

* AT 558 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZED
  HAIL...AND DAMAGING WINDS UP TO 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM DALTON TO 12 MILES NORTH OF WHITE TO 6
  MILES SOUTHWEST OF EMERSON...MOVING EAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CHATSWORTH...ETON...WALESKA...TALKING ROCK...WOODSTOCK...CANTON...
  HOLLY SPRINGS...JASPER...BUFFINGTON...NELSON...BALL GROUND...
  ELLIJAY...EAST ELLIJAY...FREE HOME...DAWSONVILLE...CUMMING AND
  DAHLONEGA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS WITH NUMEROUS
REPORTS OF DOWNED TREES AND POWERLINES. SEEK SHELTER NOW 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 3483 8414 3480 8410 3473 8410 3465 8415
      3464 8404 3468 8399 3471 8397 3449 8385
      3442 8398 3428 8393 3422 8396 3415 8409
      3405 8410 3411 8426 3419 8426 3417 8435
      3407 8442 3408 8490 3445 8481 3483 8502
TIME...MOT...LOC 2207Z 270DEG 35KT 3475 8484 3445 8468
          3409 8474

$$

1 follow-up statement

842 
WWUS52 KFFC 182243
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
643 PM EDT MON MAR 18 2013

GAC015-057-085-111-117-123-129-187-213-227-313-182252-
/O.CAN.KFFC.SV.W.0050.000000T0000Z-130318T2300Z/
WHITFIELD GA-PICKENS GA-MURRAY GA-LUMPKIN GA-BARTOW GA-CHEROKEE GA-
DAWSON GA-FANNIN GA-FORSYTH GA-GILMER GA-GORDON GA-
643 PM EDT MON MAR 18 2013

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN GORDON...GILMER...
FORSYTH...SOUTHEASTERN FANNIN...DAWSON...CHEROKEE...EASTERN BARTOW...
LUMPKIN...SOUTHERN MURRAY...PICKENS AND CENTRAL WHITFIELD COUNTIES IS
CANCELLED...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND ARE NO LONGER
EXPECTED TO PRODUCE DAMAGING WIND OR HAIL. HEAVY RAIN AND GUSTY WINDS
TO 30 MPH WILL BE POSSIBLE THROUGH 730 PM EDT.

IF YOU SAW 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 3483 8414 3480 8410 3473 8410 3465 8415
      3464 8404 3468 8399 3471 8397 3449 8385
      3442 8398 3428 8393 3422 8396 3415 8409
      3405 8410 3411 8426 3419 8426 3417 8435
      3407 8442 3408 8490 3445 8481 3483 8502
TIME...MOT...LOC 2242Z 270DEG 35KT 3475 8443 3445 8427
          3409 8433

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 11:42 AM EDT	Special Weather Statement	FFC	Bartow, Cherokee, Pickens	48 min
Mar 18, 3:29 PM EDT	Special Weather Statement	FFC	Catoosa, Dade	46 min
Mar 18, 4:31 PM EDT	Special Weather Statement	FFC	Carroll	29 min
Mar 18, 4:36 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	39 min
Mar 18, 4:40 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Haralson, Paulding	50 min
Mar 18, 5:04 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Dade, Floyd, Gordon, Murray and 2 more	56 min
Mar 18, 5:06 PM EDT	Special Weather Statement	FFC	Carroll, Coweta, Heard	24 min
Mar 18, 5:10 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Polk	65 min
Mar 18, 5:17 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Heard, Meriwether, Troup	43 min
Mar 18, 5:21 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, DeKalb, Douglas, Fulton	39 min
Mar 18, 5:24 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Fulton	51 min
Mar 18, 5:25 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Troup	65 min
Mar 18, 5:31 PM EDT	Tornado Warning	FFC	Chattooga, Floyd, Gordon, Murray, Walker, Whitfield	44 min
Mar 18, 5:34 PM EDT	Special Weather Statement	FFC	Stewart	41 min
Mar 18, 5:45 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Clayton, Cobb, Coweta, DeKalb, Douglas and 5 more	60 min
Mar 18, 5:54 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Meriwether, Pike, Spalding, Troup	51 min
Mar 18, 5:55 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion, Stewart, Webster	65 min
Mar 18, 6:00 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Fulton, Henry, Newton, Rockdale	45 min
Mar 18, 6:00 PM EDT	Tornado Warning	FFC	Bartow, Cherokee, Cobb, DeKalb, Forsyth, Fulton and 3 more	45 min
Mar 18, 6:08 PM EDT	Tornado Warning	FFC	Butts, Lamar, Meriwether, Pike, Spalding	52 min
Mar 18, 6:18 PM EDT	Tornado Warning	FFC	Henry, Newton, Rockdale	42 min
Mar 18, 6:21 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Henry	39 min
Mar 18, 6:21 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Hancock, Jasper, Morgan, Putnam	54 min
Mar 18, 6:26 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Meriwether, Talbot, Taylor, Upson	49 min
Mar 18, 6:36 PM EDT	Severe Thunderstorm Warning	FFC	Macon, Schley, Sumter	39 min
Mar 18, 6:41 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Muscogee	64 min
Mar 18, 6:43 PM EDT	Severe Thunderstorm Warning	FFC	Crawford, Lamar, Meriwether, Monroe, Pike, Upson	47 min
Mar 18, 6:49 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Morgan, Newton	41 min
Mar 18, 6:53 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe, Putnam, Spalding	37 min
Mar 18, 6:54 PM EDT	Severe Thunderstorm Warning	FFC	Jones, Lamar, Monroe	51 min
Mar 18, 6:56 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Hancock, Putnam	64 min
Mar 18, 7:06 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Dooly, Macon, Schley, Sumter	54 min
Mar 18, 7:18 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Bibb, Crawford, Hancock, Houston, Jefferson and 6 more	57 min
Mar 18, 7:25 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Marion	50 min
Mar 18, 7:45 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Crawford, Dodge, Houston, Macon, Peach and 3 more	60 min
Mar 18, 7:46 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Jefferson, Warren, Washington	59 min
Mar 18, 7:49 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Dooly, Pulaski, Sumter, Wilcox	56 min
Mar 18, 7:56 PM EDT	Tornado Warning	FFC	Crisp, Dooly, Wilcox	49 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2013 Every severe thunderstorm warning in 2013

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.