Alert archive / Georgia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 36, NWS Atlanta, GA

May 14, 201410 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 14, 2014, 8:02 PM EDT for 10 counties in Georgia. It was in force for 28 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: May 14, 2014, 8:02 PM EDT (00:02 UTC)
Expired: May 14, 2014, 8:30 PM EDT
In force: 28 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Banks County, GA, Barrow County, GA, Cherokee County, GA, Dawson County, GA, Forsyth County, GA, Hall County, GA, Jackson County, GA, Lumpkin County, GA, Pickens County, GA, White County, GA

The radar

The Atlanta radar (KFFC), 128 km from the middle of the area, began a volume at 00:03 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 14, 8:08 PM EDT	TSTM WND DMG	Coal Mountain, GA	A TREE AND POWER LINE WERE BLOWN DOWN ON BROWNS BRIDGE ROAD.
May 14, 8:10 PM EDT	TSTM WND DMG	Gainesville, GA	NINE TREES WERE REPORTED DOWN COUNTYWIDE ALONG WITH SEVERAL POWER LINES.
May 14, 8:20 PM EDT	TSTM WND DMG	Dawsonville, GA	THREE TREES WERE REPORTED DOWN ACROSS THE COUNTY.
May 14, 8:35 PM EDT	TSTM WND DMG	Dahlonega, GA	SEVERAL TREES AND POWERLINES WERE REPORTED DOWN NEAR HAPPY HOLLOW AND ROCK CHIMNEY LANES.

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, 0.0 hours before the alert went out and 125 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: 302 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

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

475 
WUUS52 KFFC 150002
SVRFFC
GAC011-013-057-085-117-139-157-187-227-311-150030-
/O.NEW.KFFC.SV.W.0036.140515T0002Z-140515T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
802 PM EDT WED MAY 14 2014

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHWESTERN BARROW COUNTY IN NORTH CENTRAL GEORGIA
  NORTHEASTERN CHEROKEE COUNTY IN NORTH CENTRAL GEORGIA
  DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
  HALL COUNTY IN NORTH CENTRAL GEORGIA
  LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA
  EASTERN PICKENS COUNTY IN NORTH CENTRAL GEORGIA
  WESTERN BANKS COUNTY IN NORTHEAST GEORGIA
  NORTHWESTERN JACKSON COUNTY IN NORTHEAST GEORGIA
  SOUTHERN WHITE COUNTY IN NORTHEAST GEORGIA

* UNTIL 830 PM EDT

* AT 758 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS UP
  TO 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
  GILLSVILLE TO CUMMING TO 9 MILES SOUTH OF FREE HOME...MOVING NORTH
  AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LULA...DAWSONVILLE...CLERMONT...BALL GROUND...NELSON...DAHLONEGA...
  CLEVELAND AND JASPER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. 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 3473 8384 3458 8363 3450 8365 3444 8362
      3449 8351 3416 8350 3411 8390 3417 8406
      3406 8411 3407 8418 3411 8426 3419 8426
      3418 8437 3447 8447 3455 8444 3458 8433
      3457 8426 3466 8413 3464 8404 3474 8394
TIME...MOT...LOC 0002Z 162DEG 41KT 3431 8368 3429 8409
          3415 8433

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 8:22 PM EDT	Special Weather Statement	FFC	Marion, Meriwether, Pike, Talbot, Taylor, Upson	38 min
May 14, 8:29 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Lumpkin, Murray, Pickens and 3 more	46 min
May 14, 9:33 PM EDT	Special Weather Statement	FFC	Coweta, Douglas, Fayette, Meriwether, Paulding	42 min
May 14, 10:04 PM EDT	Special Weather Statement	FFC	Baldwin, Bleckley, Twiggs, Wilkinson	41 min
May 14, 10:37 PM EDT	Flash Flood Warning	FFC	Bleckley	6 hr
May 14, 10:50 PM EDT	Special Weather Statement	FFC	Dodge, Pulaski, Wilcox	85 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2014 Every severe thunderstorm warning in 2014

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.