Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 10, NWS Atlanta, GA

February 28, 20114 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 28, 2011, 3:08 PM EST for 4 counties in Georgia. It was in force for 37 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: Feb 28, 2011, 3:08 PM EST (20:08 UTC)
Expired: Feb 28, 2011, 3:45 PM EST
In force: 37 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Chattooga County, GA, Dade County, GA, Floyd County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 85 km from the middle of the area, began a volume at 20:08 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 28, 1:29 PM EST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.1 hours before the alert went out and 156 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: 1162 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 350 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.

936 
WUUS52 KFFC 282008
SVRFFC
GAC055-083-115-295-282045-
/O.NEW.KFFC.SV.W.0010.110228T2008Z-110228T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
308 PM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHATTOOGA COUNTY IN NORTHWEST GEORGIA
  SOUTH CENTRAL DADE COUNTY IN NORTHWEST GEORGIA
  NORTHERN FLOYD COUNTY IN NORTHWEST GEORGIA
  WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 345 PM EST

* AT 304 PM EST...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 10 MILES WEST OF LAFAYETTE
  TO 14 MILES WEST OF SUMMERVILLE TO 31 MILES WEST OF SUMMERVILLE...
  MOVING EAST AT 60 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TRION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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.

&&

LAT...LON 3478 8548 3479 8520 3477 8520 3476 8515
      3472 8516 3471 8505 3463 8505 3459 8508
      3454 8507 3451 8509 3431 8513 3431 8547
      3468 8555
TIME...MOT...LOC 2008Z 267DEG 52KT 3473 8538 3449 8553
          3434 8579

$$

1 follow-up statement

965 
WWUS52 KFFC 282034
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
334 PM EST MON FEB 28 2011

GAC083-282042-
/O.CAN.KFFC.SV.W.0010.000000T0000Z-110228T2045Z/
DADE GA-
334 PM EST MON FEB 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL DADE COUNTY HAS 
BEEN CANCELLED...

THE THUNDERSTORMS THAT EARLIER PROMPTED THE WARNING FOR SOUTHERN 
DADE COUNTY HAVE MOVED SOUTHEAST OF THE AREA.

IF YOU SAW WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

LAT...LON 3464 8534 3478 8521 3477 8520 3476 8515
      3472 8516 3471 8505 3463 8505 3459 8508
      3454 8507 3451 8509 3431 8513 3431 8547
      3455 8552
TIME...MOT...LOC 2032Z 267DEG 52KT 3475 8496 3451 8511
          3436 8537

$$

GAC055-115-295-282045-
/O.CON.KFFC.SV.W.0010.000000T0000Z-110228T2045Z/
FLOYD GA-CHATTOOGA GA-WALKER GA-
334 PM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EST
FOR SOUTHEASTERN WALKER...CHATTOOGA AND NORTHERN FLOYD COUNTIES...

AT 327 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE 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 FROM VILLANOW...TO SUBLIGNA...TO 
CHATTOOGAVILLE...MOVING EAST AT 60 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ARMUCHEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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 800 PM EST MONDAY EVENING FOR
NORTHERN GEORGIA.

&&

LAT...LON 3464 8534 3478 8521 3477 8520 3476 8515
      3472 8516 3471 8505 3463 8505 3459 8508
      3454 8507 3451 8509 3431 8513 3431 8547
      3455 8552
TIME...MOT...LOC 2032Z 267DEG 52KT 3475 8496 3451 8511
          3436 8537

$$



19

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 4:04 AM EST	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 90 more	15 hr
Feb 28, 2:25 PM EST	Severe Thunderstorm Warning	FFC	Catoosa, Dade, Walker	50 min
Feb 28, 2:45 PM EST	Severe Thunderstorm Warning	FFC	Murray, Whitfield	45 min
Feb 28, 3:13 PM EST	Severe Thunderstorm Warning	FFC	Fannin, Gilmer	32 min
Feb 28, 3:29 PM EST	Severe Thunderstorm Warning	FFC	Towns, Union	31 min
Feb 28, 3:42 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Chattooga, Floyd, Gordon	48 min
Feb 28, 3:50 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Polk	25 min
Feb 28, 4:09 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Pickens	51 min
Feb 28, 4:17 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd	13 min
Feb 28, 4:32 PM EST	Tornado Warning	FFC	Bartow, Cherokee, Cobb, Paulding	28 min
Feb 28, 4:40 PM EST	Severe Thunderstorm Warning	FFC	Dawson, Forsyth, Hall	50 min
Feb 28, 4:56 PM EST	Tornado Warning	FFC	Cherokee, Cobb, Forsyth, Fulton	35 min
Feb 28, 5:04 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Paulding, Polk	41 min
Feb 28, 5:16 PM EST	Severe Thunderstorm Warning	FFC	Banks, Barrow, Clarke, Gwinnett, Hall, Jackson and 3 more	44 min
Feb 28, 5:49 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Cobb, Douglas, Fulton, Paulding	41 min
Feb 28, 5:55 PM EST	Tornado Warning	FFC	Douglas, Fulton	35 min
Feb 28, 6:12 PM EST	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Henry, Newton, Rockdale	33 min
Feb 28, 6:36 PM EST	Severe Thunderstorm Warning	FFC	Meriwether, Troup	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.