Alert archive / Georgia / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 438, NWS Atlanta, GA

July 12, 2011Dade County, Walker County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 12, 2011, 1:55 PM EDT for Dade County, Walker County, Georgia. It was in force for 35 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 12, 2011, 1:55 PM EDT (17:55 UTC)
Expired: Jul 12, 2011, 2:30 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 55 km from the middle of the area, began a volume at 17:56 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

Nashville Metro, TN (KBNA), launched 12:00Z, 5.9 hours before the alert went out and 171 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: 2386 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1325 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 1 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.

644 
WUUS52 KFFC 121755
SVRFFC
GAC083-295-121845-
/O.NEW.KFFC.SV.W.0438.110712T1755Z-110712T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
155 PM EDT TUE JUL 12 2011

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DADE COUNTY IN NORTHWEST GEORGIA
  NORTH CENTRAL WALKER COUNTY IN NORTHWEST GEORGIA

* UNTIL 245 PM EDT

* AT 153 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 LOOKOUT MOUNTAIN...MOVING SOUTH
  AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  TRENTON AND CHICKAMAUGA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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 3499 8530 3475 8528 3474 8556 3475 8557
      3497 8561 3498 8561 3499 8560
TIME...MOT...LOC 1756Z 349DEG 9KT 3494 8543

$$

2 follow-up statements

165 
WWUS52 KFFC 121811
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
211 PM EDT TUE JUL 12 2011

GAC083-295-121845-
/O.CON.KFFC.SV.W.0438.000000T0000Z-110712T1845Z/
WALKER GA-DADE GA-
211 PM EDT TUE JUL 12 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR DADE AND NORTH CENTRAL WALKER COUNTIES...

AT 211 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 NEAR NEW ENGLAND...MOVING SOUTH AT
10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CHICKAMAUGA...CLOUDLAND CANYON STATE PARK...COOPER HEIGHTS AND RISING
FAWN.

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 3499 8530 3475 8528 3474 8556 3475 8557
      3497 8561 3498 8561 3499 8560
TIME...MOT...LOC 1811Z 349DEG 9KT 3488 8544

$$

888 
WWUS52 KFFC 121830
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
230 PM EDT TUE JUL 12 2011

GAC083-295-121838-
/O.CAN.KFFC.SV.W.0438.000000T0000Z-110712T1845Z/
WALKER GA-DADE GA-
230 PM EDT TUE JUL 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR DADE AND NORTH CENTRAL WALKER
COUNTIES IS CANCELLED...

AT 230 PM EDT... RADAR INDICATED THE THUNDERSTORM HAS WEAKENED AND 
IS NO LONGER EXPECTED TO PRODUCE SEVERE WEATHER. THE STORM WAS 
LOCATED NEAR NEW ENGLAND AND DRIFTING SOUTH AT 5 TO 10 MPH. ALTHOUGH 
THE STORM IS NO LONGER SEVERE...GUSTY WINDS UP TO 40 MPH...BRIEF 
HEAVY RAIN...AND OCCASIONAL LIGHTNING ARE STILL POSSIBLE WITH THIS 
STORM.

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 3499 8530 3475 8528 3474 8556 3475 8557
      3497 8561 3498 8561 3499 8560
TIME...MOT...LOC 1828Z 349DEG 9KT 3484 8543

$$

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, 9:22 PM EDT	Severe Thunderstorm Warning	FFC	Gordon	23 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, 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.