Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 521, NWS Atlanta, GA

December 22, 20115 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Dec 22, 2011, 6:11 PM EST for 5 counties in Georgia. It was in force for 49 min. 5 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
Dec 22, 2011, 6:11 PM EST (23:11 UTC)
Expired
Dec 22, 2011, 7:00 PM EST
In force
49 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon

Counties Clayton County, GA, Fayette County, GA, Henry County, GA, Pike County, GA, Spalding County, GA

The radar

The Atlanta radar (KFFC), 16 km from the middle of the area, began a volume at 23:12 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

TimeReportWhereRemark
Dec 22, 6:16 PM ESTTORNADO 12 S Woolsey, GAAN NWS ASSESSMENT TEAM DETERMINED THAT A WEAK TORNADO WITH WINDS OF 95 MPH TOUCHED DOWN AROUND 616 PM EST ON THE NORTHEAST SHORE OF LAKE HORTON NEAR THE END OF WOOLSEY CREEK TRAIL AND JUST WEST OF HIGHWAY 92. THE TORNADO TRAVELED 1.6 MILES WITH INTERMITTENT DA
Dec 22, 6:20 PM ESTTSTM WND DMG1 E Woolsey, GAEMERGENCY MANAGER REPORTED ROOF DAMAGE TO RESIDENCE ALONG MUD BRIDGE ROAD ALONG WITH A LARGE BARN AND TWO OUT HOUSES DESTROYED.
Dec 22, 6:21 PM ESTTSTM WND DMG2 Ene Woolsey, GAONE TREE DOWN ON PANHANDLE ROAD AT WOOLSEY ROAD.
Dec 22, 6:30 PM ESTTSTM WND DMGHampton, GACOUPLE OF TREES DOWN IN HAMPTON.
Dec 22, 6:35 PM ESTTSTM WND DMGMcdonough, GAA COUPLE OF TREES DOWN AROUND MCDONOUGH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Dec 22, 3:20 PM ESTTornado WatchSPC6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.2 hours before the alert went out and 11 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2011-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2011-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

972 
WUUS52 KFFC 222311
SVRFFC
GAC063-113-151-231-255-230000-
/O.NEW.KFFC.SV.W.0521.111222T2311Z-111223T0000Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CLAYTON COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHEASTERN FAYETTE COUNTY IN NORTH CENTRAL GEORGIA
  HENRY COUNTY IN NORTH CENTRAL GEORGIA
  NORTHWESTERN PIKE COUNTY IN WEST CENTRAL GEORGIA
  WESTERN SPALDING COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 700 PM EST

* AT 607 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60
  MPH.  THIS STORM WAS LOCATED NEAR BROOKS...MOVING NORTHEAST AT 50
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WOOLSEY...SUNNY SIDE...HAMPTON...LOVEJOY...MCDONOUGH AND
  STOCKBRIDGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. ALTHOUGH
CURRENT DATA DOES NOT INDICATE THE EXISTENCE OF A TORNADO...A TORNADO
MAY STILL DEVELOP. 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EST THURSDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3341 8438 3360 8420 3345 8396 3312 8450
      3315 8452 3317 8451 3318 8450 3325 8451
      3326 8450 3334 8453
TIME...MOT...LOC 2311Z 234DEG 43KT 3327 8444

$$
2 follow-up statements
556 
WWUS52 KFFC 222324
SVSFFC

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

GAC231-222334-
/O.CAN.KFFC.SV.W.0521.000000T0000Z-111223T0000Z/
PIKE GA-
624 PM EST THU DEC 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PIKE COUNTY IS 
CANCELLED...

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 3321 8436 3338 8444 3341 8438 3360 8420
      3345 8396
TIME...MOT...LOC 2324Z 234DEG 43KT 3336 8429

$$

GAC063-113-151-255-230000-
/O.CON.KFFC.SV.W.0521.000000T0000Z-111223T0000Z/
SPALDING GA-FAYETTE GA-HENRY GA-CLAYTON GA-
624 PM EST THU DEC 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EST
FOR SOUTHEASTERN CLAYTON...HENRY...EAST CENTRAL FAYETTE AND WESTERN
SPALDING COUNTIES...

AT 621 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. THIS STORM WAS LOCATED NEAR SUNNY SIDE...MOVING NORTHEAST
AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HAMPTON...LOVEJOY...TOWALAGA...LUELLA...EAGLES LANDING...
BLACKSVILLE...FLIPPEN...MCDONOUGH...STOCKBRIDGE AND OLA.

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 1100 PM EST THURSDAY EVENING
FOR NORTHERN GEORGIA.

&&

LAT...LON 3321 8436 3338 8444 3341 8438 3360 8420
      3345 8396
TIME...MOT...LOC 2324Z 234DEG 43KT 3336 8429

$$
105 
WWUS52 KFFC 222351
SVSFFC

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

GAC063-113-151-255-230001-
/O.EXP.KFFC.SV.W.0521.000000T0000Z-111223T0000Z/
SPALDING GA-FAYETTE GA-HENRY GA-CLAYTON GA-
651 PM EST THU DEC 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAYTON...
HENRY...EAST CENTRAL FAYETTE AND WESTERN SPALDING COUNTIES EXPIRES AT
700 PM EST...

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 3321 8436 3338 8444 3341 8438 3360 8420
      3345 8396
TIME...MOT...LOC 2351Z 234DEG 43KT 3355 8398

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 9:11 PM ESTDense Fog AdvisoryFFCBanks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more11 hr
Dec 22, 8:04 AM ESTDense Fog AdvisoryFFCBanks, Barrow, Bartow, Butts, Carroll, Catoosa and 47 more116 min
Dec 22, 3:51 PM ESTSpecial Weather StatementFFCChattooga, Floyd, Haralson, Polk39 min
Dec 22, 4:14 PM ESTSpecial Weather StatementFFCCarroll61 min
Dec 22, 4:26 PM ESTSevere Thunderstorm WarningFFCHaralson, Polk32 min
Dec 22, 4:34 PM ESTSpecial Weather StatementFFCTowns, Union26 min
Dec 22, 4:37 PM ESTSpecial Weather StatementFFCBartow, Catoosa, Chattooga, Floyd, Gordon, Murray and 2 more53 min
Dec 22, 4:39 PM ESTSpecial Weather StatementFFCHeard, Troup66 min
Dec 22, 4:52 PM ESTSevere Thunderstorm WarningFFCBartow, Floyd, Gordon23 min
Dec 22, 4:56 PM ESTSpecial Weather StatementFFCPaulding34 min
Dec 22, 5:13 PM ESTSevere Thunderstorm WarningFFCGordon32 min
Dec 22, 5:15 PM ESTSevere Thunderstorm WarningFFCCarroll, Coweta, Douglas, Fulton, Heard45 min
Dec 22, 5:23 PM ESTSevere Thunderstorm WarningFFCGilmer, Murray, Pickens25 min
Dec 22, 5:29 PM ESTSpecial Weather StatementFFCCherokee, Dawson, Forsyth, Pickens31 min
Dec 22, 5:32 PM ESTSevere Thunderstorm WarningFFCCoweta, Fayette, Meriwether, Troup43 min
Dec 22, 5:36 PM ESTSpecial Weather StatementFFCCobb24 min
Dec 22, 5:40 PM ESTSpecial Weather StatementFFCMeriwether35 min
Dec 22, 5:44 PM ESTTornado WarningFFCCoweta, Fayette, Meriwether46 min
Dec 22, 6:02 PM ESTSevere Thunderstorm WarningFFCHarris, Meriwether, Pike, Talbot, Upson43 min
Dec 22, 6:08 PM ESTSpecial Weather StatementFFCDeKalb, Forsyth, Fulton, Gwinnett, Hall37 min
Dec 22, 6:35 PM ESTSpecial Weather StatementFFCMarion, Schley, Taylor25 min
Dec 22, 6:35 PM ESTSevere Thunderstorm WarningFFCHall27 min
Dec 22, 6:43 PM ESTSpecial Weather StatementFFCLamar, Monroe, Upson47 min
Dec 22, 6:58 PM ESTSpecial Weather StatementFFCBanks, Barrow, Clarke, Gwinnett, Jackson, Madison and 1 more47 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.