Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 437, NWS Atlanta, GA

July 11, 2011Gordon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 11, 2011, 9:22 PM EDT for Gordon County, 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: Jul 11, 2011, 9:22 PM EDT (01:22 UTC)
Expired: Jul 11, 2011, 9:45 PM EDT
In force: 23 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Gordon County, GA

The radar

The Northeast Alabama radar (KHTX), 109 km from the middle of the area, began a volume at 01:21 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 00:00Z, 1.4 hours before the alert went out and 133 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: 1002 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 25 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.

983 
WUUS52 KFFC 120122
SVRFFC
GAC129-120145-
/O.NEW.KFFC.SV.W.0437.110712T0122Z-110712T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
922 PM EDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN GORDON COUNTY IN NORTHWEST GEORGIA

* UNTIL 945 PM EDT

* AT 918 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP TO 60   
  MPH.  THIS STORM WAS LOCATED NEAR CALHOUN AND WAS NEARLY   
  STATIONARY.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

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 3461 8496 3440 8485 3440 8495 3439 8496
      3440 8498 3439 8498 3442 8511 3443 8509
      3446 8511 3447 8509 3454 8509 3455 8506
      3459 8507 3462 8506
TIME...MOT...LOC 0122Z 314DEG 0KT 3451 8496

$$

2 follow-up statements

947 
WWUS52 KFFC 120137
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
937 PM EDT MON JUL 11 2011

GAC129-120145-
/O.CON.KFFC.SV.W.0437.000000T0000Z-110712T0145Z/
GORDON GA-
937 PM EDT MON JUL 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR WESTERN GORDON COUNTY...

AT 931 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS UP
TO 60 MPH. THIS STORM WAS LOCATED BETWEEN CALHOUN AND SUGAR VALLEY. 
THIS STORM WAS NEARLY STATIONARY.

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

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.

&&

LAT...LON 3447 8509 3454 8509 3457 8497 3440 8485
      3440 8495 3439 8496 3440 8498 3439 8498
      3442 8510 3443 8509 3446 8511
TIME...MOT...LOC 0136Z 314DEG 0KT 3451 8496

$$



19

281 
WWUS52 KFFC 120150
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
950 PM EDT MON JUL 11 2011

GAC129-120159-
/O.EXP.KFFC.SV.W.0437.000000T0000Z-110712T0145Z/
GORDON GA-
950 PM EDT MON JUL 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN GORDON COUNTY EXPIRED
AT 945 PM EDT...

AT 948 PM EDT...THE THUNDERSTORM THAT EARLIER PROMPTED THE WARNING 
FOR GORDON COUNTY HAS WEAKENED CONSIDERABLY AND IS NO LONGER 
INDICATED AS BEING SEVERE. MODERATE TO HEAVY RAIN AND OCCASIONAL 
CLOUD-TO-GROUND LIGHTNING WILL CONTINUE ACROSS SOUTHWEST GORDON 
COUNTY FOR ANOTHER 30 MINUTES OR SO...BUT SEVERE WEATHER IS NO 
LONGER IMMINENT AT THIS TIME.

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.

LAT...LON 3447 8509 3454 8509 3457 8497 3440 8485
      3440 8495 3439 8496 3440 8498 3439 8498
      3442 8510 3443 8509 3446 8511
TIME...MOT...LOC 0137Z 314DEG 0KT 3451 8496

$$



19

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 9:18 PM EDT	Special Weather Statement	FFC	Gordon	27 min
Jul 11, 9:48 PM EDT	Special Weather Statement	FFC	Floyd	27 min
Jul 11, 9:57 PM EDT	Special Weather Statement	FFC	Gordon	33 min
Jul 11, 9:59 PM EDT	Special Weather Statement	FFC	Gordon	31 min
Jul 11, 10:33 PM EDT	Special Weather Statement	FFC	Gordon	57 min
Jul 12, 8:56 AM EDT	Special Weather Statement	FFC	Bartow	34 min
Jul 12, 11:54 AM EDT	Special Weather Statement	FFC	Haralson	36 min
Jul 12, 1:42 PM EDT	Special Weather Statement	FFC	Douglas	33 min
Jul 12, 1:50 PM EDT	Special Weather Statement	FFC	Rockdale	40 min
Jul 12, 1:55 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	35 min
Jul 12, 2:11 PM EDT	Special Weather Statement	FFC	Rockdale	34 min
Jul 12, 2:30 PM EDT	Special Weather Statement	FFC	Clayton	30 min
Jul 12, 2:44 PM EDT	Special Weather Statement	FFC	Chattooga	31 min
Jul 12, 2:52 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Henry	23 min
Jul 12, 3:04 PM EDT	Special Weather Statement	FFC	Gwinnett	26 min
Jul 12, 3:08 PM EDT	Heat Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Bibb, Bleckley and 75 more	37 hr
Jul 12, 3:13 PM EDT	Special Weather Statement	FFC	DeKalb	32 min
Jul 12, 3:16 PM EDT	Special Weather Statement	FFC	Fayette	29 min
Jul 12, 3:21 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Fayette	39 min
Jul 12, 3:32 PM EDT	Severe Thunderstorm Warning	FFC	Fulton	30 min
Jul 12, 3:41 PM EDT	Special Weather Statement	FFC	Gwinnett	49 min
Jul 12, 4:09 PM EDT	Special Weather Statement	FFC	Coweta	36 min
Jul 12, 4:23 PM EDT	Special Weather Statement	FFC	Meriwether	37 min
Jul 12, 4:35 PM EDT	Special Weather Statement	FFC	Meriwether	25 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.