Alert archive / Georgia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 204, NWS Atlanta, GA

July 11, 20166 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 11, 2016, 7:01 PM EDT for 6 counties in Georgia. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 11, 2016, 7:01 PM EDT (23:01 UTC)
Expired: Jul 11, 2016, 7:30 PM EDT
In force: 29 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Barrow County, GA, DeKalb County, GA, Gwinnett County, GA, Newton County, GA, Rockdale County, GA, Walton County, GA

The radar

The Atlanta radar (KFFC), 90 km from the middle of the area, began a volume at 23:04 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.0 hours before the alert went out and 85 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: 133 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1028 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

565 
WUUS52 KFFC 112301
SVRFFC
GAC013-089-135-217-247-297-112330-
/O.NEW.KFFC.SV.W.0204.160711T2301Z-160711T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
701 PM EDT MON JUL 11 2016

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WALTON COUNTY IN GEORGIA...
  GWINNETT COUNTY IN GEORGIA...
  NORTHEASTERN ROCKDALE COUNTY IN GEORGIA...
  BARROW COUNTY IN GEORGIA...
  CENTRAL DEKALB COUNTY IN GEORGIA...
  NORTHEASTERN NEWTON COUNTY IN GEORGIA...

* UNTIL 730 PM EDT

* AT 700 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM TUCKER TO NEAR LOGANVILLE TO NEAR COVINGTON...MOVING
  NORTHEAST AT 45 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  LAWRENCEVILLE...CONYERS...WINDER...MONROE...COVINGTON...DULUTH...SUGAR
  HILL...SNELLVILLE...SUWANEE...BUFORD...LILBURN...LOGANVILLE...NORCROSS...
  CLARKSTON...BRASELTON...AUBURN...STONE MOUNTAIN...DACULA...SOCIAL CIRCLE
  AND GRAYSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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 OR TWEET US YOUR REPORT AT NWSATLANTA.

&&

LAT...LON 3405 8370 3393 8361 3391 8364 3389 8363
      3388 8358 3385 8358 3380 8352 3360 8368
      3350 8382 3369 8402 3382 8428 3403 8416
      3403 8412 3405 8410 3407 8412 3409 8411
      3417 8406
TIME...MOT...LOC 2300Z 211DEG 40KT 3388 8420 3379 8394 3356 8380 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 3:24 PM EDT	Special Weather Statement	FFC	Webster	36 min
Jul 11, 3:39 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Schley, Stewart, Sumter, Webster	51 min
Jul 11, 4:41 PM EDT	Special Weather Statement	FFC	Harris	34 min
Jul 11, 5:08 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Meriwether, Talbot, Troup	52 min
Jul 11, 5:10 PM EDT	Special Weather Statement	FFC	Troup	35 min
Jul 11, 5:31 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Meriwether, Troup	44 min
Jul 11, 6:02 PM EDT	Special Weather Statement	FFC	Fulton	28 min
Jul 11, 6:06 PM EDT	Special Weather Statement	FFC	Cobb	39 min
Jul 11, 6:12 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Forsyth, Fulton, Paulding	48 min
Jul 11, 6:13 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette	32 min
Jul 11, 6:16 PM EDT	Severe Thunderstorm Warning	FFC	Henry	29 min
Jul 11, 6:31 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett, Newton, Rockdale, Walton	29 min
Jul 11, 7:01 PM EDT	Special Weather Statement	FFC	Bartow, Cherokee, Dawson, Floyd, Forsyth, Gordon and 3 more	44 min
Jul 11, 7:09 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Pickens	36 min
Jul 11, 7:33 PM EDT	Special Weather Statement	FFC	Barrow, Gwinnett, Jackson, Oconee, Walton	27 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.