Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 522, NWS Atlanta, GA

December 22, 2011Hall County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Dec 22, 2011, 6:35 PM EST for Hall County, Georgia. It was in force for 27 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: Dec 22, 2011, 6:35 PM EST (23:35 UTC)
Expired: Dec 22, 2011, 7:02 PM EST
In force: 27 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Hall County, GA

The radar

The Atlanta radar (KFFC), 126 km from the middle of the area, began a volume at 23:35 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
Dec 22, 3:20 PM EST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.6 hours before the alert went out and 122 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: 26 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 123 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.

798 
WUUS52 KFFC 222335
SVRFFC
GAC139-230015-
/O.NEW.KFFC.SV.W.0522.111222T2335Z-111223T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
635 PM EST THU DEC 22 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HALL COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 715 PM EST

* AT 635 PM EST...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 9
  MILES NORTHWEST OF GAINESVILLE TO NEAR FLOWERY BRANCH... AND       
  MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CLERMONT...LULA AND GILLSVILLE.

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 1100 PM EST THURSDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3451 8366 3443 8361 3441 8365 3437 8367
      3430 8362 3428 8363 3410 8386 3416 8406
      3417 8406 3420 8404 3419 8399 3422 8396
      3428 8393 3435 8398 3442 8398 3450 8384
TIME...MOT...LOC 2335Z 257DEG 37KT 3440 8388 3428 8385
          3417 8393

$$

1 follow-up statement

154 
WWUS52 KFFC 230002
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
702 PM EST THU DEC 22 2011

GAC139-230010-
/O.CAN.KFFC.SV.W.0522.000000T0000Z-111223T0015Z/
HALL GA-
702 PM EST THU DEC 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR HALL COUNTY IS CANCELLED...

THE LINE OF STORMS HAVE WEAKENED OVER EAST HALL COUNTY...AND ARE NO 
LONGER EXPECTED TO PRODUCE SEVERE WEATHER. HOWEVER...STRONG GUSTY 
WINDS UP TO 45 MPH AND BRIEF HEAVY RAIN ARE STILL POSSIBLE WITH 
THESE STORMS...MAINLY OVER EASTERN HALL COUNTY THROUGH 715 PM.

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 1100 PM EST THURSDAY EVENING
FOR NORTHERN GEORGIA.

LAT...LON 3451 8366 3443 8361 3441 8365 3437 8367
      3430 8362 3428 8363 3410 8386 3416 8406
      3417 8406 3420 8404 3419 8399 3422 8396
      3428 8393 3435 8398 3442 8398 3450 8384
TIME...MOT...LOC 0000Z 257DEG 37KT 3446 8364 3434 8361
          3420 8376

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 21, 9:11 PM EST	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more	11 hr
Dec 22, 8:04 AM EST	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more	116 min
Dec 22, 3:51 PM EST	Special Weather Statement	FFC	Chattooga, Floyd, Haralson, Polk	39 min
Dec 22, 4:14 PM EST	Special Weather Statement	FFC	Carroll	61 min
Dec 22, 4:26 PM EST	Severe Thunderstorm Warning	FFC	Haralson, Polk	32 min
Dec 22, 4:34 PM EST	Special Weather Statement	FFC	Towns, Union	26 min
Dec 22, 4:37 PM EST	Special Weather Statement	FFC	Bartow, Catoosa, Chattooga, Floyd, Gordon, Murray and 2 more	53 min
Dec 22, 4:39 PM EST	Special Weather Statement	FFC	Heard, Troup	66 min
Dec 22, 4:52 PM EST	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Gordon	23 min
Dec 22, 4:56 PM EST	Special Weather Statement	FFC	Paulding	34 min
Dec 22, 5:13 PM EST	Severe Thunderstorm Warning	FFC	Gordon	32 min
Dec 22, 5:15 PM EST	Severe Thunderstorm Warning	FFC	Carroll, Coweta, Douglas, Fulton, Heard	45 min
Dec 22, 5:23 PM EST	Severe Thunderstorm Warning	FFC	Gilmer, Murray, Pickens	25 min
Dec 22, 5:29 PM EST	Special Weather Statement	FFC	Cherokee, Dawson, Forsyth, Pickens	31 min
Dec 22, 5:32 PM EST	Severe Thunderstorm Warning	FFC	Coweta, Fayette, Meriwether, Troup	43 min
Dec 22, 5:36 PM EST	Special Weather Statement	FFC	Cobb	24 min
Dec 22, 5:40 PM EST	Special Weather Statement	FFC	Meriwether	35 min
Dec 22, 5:44 PM EST	Tornado Warning	FFC	Coweta, Fayette, Meriwether	46 min
Dec 22, 6:02 PM EST	Severe Thunderstorm Warning	FFC	Harris, Meriwether, Pike, Talbot, Upson	43 min
Dec 22, 6:08 PM EST	Special Weather Statement	FFC	DeKalb, Forsyth, Fulton, Gwinnett, Hall	37 min
Dec 22, 6:11 PM EST	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Henry, Pike, Spalding	49 min
Dec 22, 6:35 PM EST	Special Weather Statement	FFC	Marion, Schley, Taylor	25 min
Dec 22, 6:43 PM EST	Special Weather Statement	FFC	Lamar, Monroe, Upson	47 min
Dec 22, 6:58 PM EST	Special Weather Statement	FFC	Banks, Barrow, Clarke, Gwinnett, Jackson, Madison and 1 more	47 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.