Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 153, NWS Atlanta, GA

April 15, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 15, 2011, 5:52 PM EDT for 4 counties in Georgia. It was in force for 23 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: Apr 15, 2011, 5:52 PM EDT (21:52 UTC)
Expired: Apr 15, 2011, 6:15 PM EDT
In force: 23 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Dawson County, GA, Fannin County, GA, Gilmer County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 150 km from the middle of the area, began a volume at 21:53 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 15, 5:46 PM EDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 149 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1094 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 198 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.

230 
WUUS52 KFFC 152152
SVRFFC
GAC085-111-123-227-152215-
/O.NEW.KFFC.SV.W.0153.110415T2152Z-110415T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
552 PM EDT FRI APR 15 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN FANNIN COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN GILMER COUNTY IN NORTH CENTRAL GEORGIA
  NORTH CENTRAL PICKENS COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 615 PM EDT

* AT 548 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 CARTECAY TO ROY TO SEQUOYAH LAKE...
  MOVING NORTHEAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MARION...PISGAH...STOVER CREEK SHELTER...AMICALOLA FALLS STATE
  PARK...SPRINGER MOUNTAIN SHELTER...BLACK GAP SHELTER...DIAL...LEN
  FOOTE HIKE INN AND MARGRET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT SATURDAY MORNING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3479 8413 3480 8410 3473 8409 3460 8419
      3456 8419 3451 8442 3460 8441 3466 8444
      3482 8414
TIME...MOT...LOC 2152Z 246DEG 35KT 3468 8437 3464 8430
          3453 8437

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:12 AM EDT	Wind Advisory	FFC	Bartow, Carroll, Catoosa, Chattooga, Cherokee, Cobb and 18 more	16 hr
Apr 15, 4:54 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gordon, Murray, Pickens	51 min
Apr 15, 5:14 PM EDT	Tornado Warning	FFC	Gilmer, Gordon, Pickens	46 min
Apr 15, 6:14 PM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Lumpkin, Union	46 min
Apr 15, 6:20 PM EDT	Severe Thunderstorm Warning	FFC	Gordon, Murray, Whitfield	25 min
Apr 15, 6:29 PM EDT	Severe Thunderstorm Warning	FFC	Carroll	46 min
Apr 15, 6:35 PM EDT	Severe Thunderstorm Warning	FFC	Towns	40 min
Apr 15, 6:38 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Gordon	52 min
Apr 15, 6:41 PM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray	49 min
Apr 15, 6:44 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Fulton, Paulding, Polk	46 min
Apr 15, 6:52 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Paulding	23 min
Apr 15, 7:07 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Troup	38 min
Apr 15, 7:11 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Douglas, Fulton	34 min
Apr 15, 7:22 PM EDT	Tornado Warning	FFC	Harris, Muscogee	38 min
Apr 15, 7:43 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Cobb, Fulton	47 min
Apr 15, 7:51 PM EDT	Tornado Warning	FFC	Harris, Meriwether, Talbot	39 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011 Every severe thunderstorm warning in 2011

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.