Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 54, NWS Atlanta, GA

March 15, 20124 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 15, 2012, 2:11 PM EDT for 4 counties in Georgia. It was in force for 49 min. 2 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: Mar 15, 2012, 2:11 PM EDT (18:11 UTC)
Expired: Mar 15, 2012, 3:00 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Dawson County, GA, Forsyth County, GA, Hall County, GA, Lumpkin County, GA

The radar

The Atlanta radar (KFFC), 137 km from the middle of the area, began a volume at 18:14 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

Time	Report	Where	Remark
Mar 15, 2:15 PM EDT	HAIL 0.88	Nimblewill, GA	PUBLIC REPORTED HAIL UP TO THE SIZE OF NICKLES IN NIMBLEWILL AROUND 215 PM EDT.
Mar 15, 2:24 PM EDT	HAIL 0.25	Se Dawsonville, GA	LOCAL FIRST RESPONDERS REPORTED PEA SIZED HAIL NEAR BUDDY BURT ROAD ONE HALF MILE SOUTHEAST OF TOWN.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.2 hours before the alert went out and 135 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: 866 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 8 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.

137 
WUUS52 KFFC 151811
SVRFFC
GAC085-117-139-187-151900-
/O.NEW.KFFC.SV.W.0054.120315T1811Z-120315T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
211 PM EDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN DAWSON COUNTY IN NORTH CENTRAL GEORGIA
  NORTHEASTERN FORSYTH COUNTY IN NORTH CENTRAL GEORGIA
  WESTERN HALL COUNTY IN NORTH CENTRAL GEORGIA
  SOUTHERN LUMPKIN COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 300 PM EDT

* AT 206 PM EDT...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 9 MILES WEST OF DAHLONEGA TO  
  NEAR DAWSONVILLE...MOVING SOUTHEAST AT 10 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3454 8393 3416 8390 3434 8419 3461 8421
      3462 8419 3461 8419 3464 8416 3465 8415
      3466 8413
TIME...MOT...LOC 1810Z 307DEG 7KT 3458 8413 3437 8411

$$

2 follow-up statements

790 
WWUS52 KFFC 151837
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
237 PM EDT THU MAR 15 2012

GAC139-151846-
/O.CAN.KFFC.SV.W.0054.000000T0000Z-120315T1900Z/
HALL GA-
237 PM EDT THU MAR 15 2012

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

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

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

LAT...LON 3454 8393 3445 8392 3442 8398 3440 8397
      3438 8398 3428 8393 3427 8395 3424 8395
      3421 8398 3434 8419 3461 8421 3462 8420
      3461 8419 3465 8415
TIME...MOT...LOC 1836Z 312DEG 6KT 3455 8412 3435 8412

$$

GAC085-117-187-151900-
/O.CON.KFFC.SV.W.0054.000000T0000Z-120315T1900Z/
LUMPKIN GA-DAWSON GA-FORSYTH GA-
237 PM EDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHEASTERN FORSYTH...EASTERN DAWSON AND SOUTHERN LUMPKIN
COUNTIES...

AT 232 PM EDT...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 EXTENDING FROM NIMBLEWILL TO SILVER CITY...
MOVING SOUTHEAST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LUMPKIN...AURARIA...DAHLONEGA...OSCARVILLE...CHESTATEE...WAR HILL
PARK AND DOUGHERTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MEMBERS OF THE PUBLIC REPORTED NICKLE SIZED HAIL AS THIS STORM MOVED 
THROUGH NIMBLEWILL IN WESTERN LUMPKIN COUNTY. IF YOU ARE IN THE PATH 
OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3454 8393 3445 8392 3442 8398 3440 8397
      3438 8398 3428 8393 3427 8395 3424 8395
      3421 8398 3434 8419 3461 8421 3462 8420
      3461 8419 3465 8415
TIME...MOT...LOC 1836Z 312DEG 6KT 3455 8412 3435 8412

$$

987 
WWUS52 KFFC 151853
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
253 PM EDT THU MAR 15 2012

GAC117-187-151902-
/O.CAN.KFFC.SV.W.0054.000000T0000Z-120315T1900Z/
LUMPKIN GA-FORSYTH GA-
253 PM EDT THU MAR 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FORSYTH AND
SOUTHERN LUMPKIN COUNTIES IS CANCELLED...

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
AURARIA...DAHLONEGA...OSCARVILLE AND CHESTATEE.

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

LAT...LON 3454 8419 3447 8411 3442 8398 3440 8397
      3439 8398 3435 8398 3434 8396 3433 8418
      3434 8419 3461 8421 3462 8420
TIME...MOT...LOC 1852Z 312DEG 6KT 3449 8415 3436 8416

$$

GAC085-151900-
/O.CON.KFFC.SV.W.0054.000000T0000Z-120315T1900Z/
DAWSON GA-
253 PM EDT THU MAR 15 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR EASTERN DAWSON COUNTY...

AT 249 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZED 
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THESE STORMS WERE LOCATED 
ALONG A LINE EXTENDING FROM JUNO TO SILVER CITY...MOVING SOUTHEAST 
AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MCKEE...LUMPKIN...WAR HILL PARK...DOUGHERTY AND DAWSONVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU SEE WIND DAMAGE...HAIL OR 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. YOU CAN ALSO TWEET YOUR REPORT USING HASHTAG GAWX.

&&

LAT...LON 3454 8419 3447 8411 3442 8398 3440 8397
      3439 8398 3435 8398 3434 8396 3433 8418
      3434 8419 3461 8421 3462 8420
TIME...MOT...LOC 1852Z 312DEG 6KT 3449 8415 3436 8416

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 12:32 PM EDT	Special Weather Statement	FFC	Fannin	28 min
Mar 15, 12:56 PM EDT	Special Weather Statement	FFC	Lumpkin	34 min
Mar 15, 12:59 PM EDT	Special Weather Statement	FFC	Fannin	31 min
Mar 15, 1:28 PM EDT	Special Weather Statement	FFC	Gilmer	32 min
Mar 15, 1:30 PM EDT	Special Weather Statement	FFC	Lumpkin	30 min
Mar 15, 1:59 PM EDT	Special Weather Statement	FFC	Dawson, Fannin, Gilmer, Lumpkin	31 min
Mar 15, 2:49 PM EDT	Special Weather Statement	FFC	Union	26 min
Mar 15, 3:00 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth	30 min
Mar 15, 3:07 PM EDT	Special Weather Statement	FFC	White	23 min
Mar 15, 3:29 PM EDT	Flash Flood Warning	FFC	Dawson	3 hr
Mar 15, 3:29 PM EDT	Special Weather Statement	FFC	Cherokee, Forsyth	46 min
Mar 15, 3:56 PM EDT	Special Weather Statement	FFC	Whitfield	34 min
Mar 15, 4:05 PM EDT	Special Weather Statement	FFC	Murray	25 min
Mar 15, 4:12 PM EDT	Special Weather Statement	FFC	Dawson	33 min
Mar 15, 4:14 PM EDT	Special Weather Statement	FFC	Forsyth	31 min
Mar 15, 4:19 PM EDT	Special Weather Statement	FFC	Paulding	26 min
Mar 15, 4:27 PM EDT	Special Weather Statement	FFC	Douglas	33 min
Mar 15, 4:30 PM EDT	Special Weather Statement	FFC	Murray	30 min
Mar 15, 4:39 PM EDT	Special Weather Statement	FFC	Barrow	36 min
Mar 15, 4:41 PM EDT	Special Weather Statement	FFC	Paulding	34 min
Mar 15, 4:44 PM EDT	Special Weather Statement	FFC	Fulton	31 min
Mar 15, 4:54 PM EDT	Special Weather Statement	FFC	Douglas	21 min
Mar 15, 5:06 PM EDT	Special Weather Statement	FFC	Haralson	24 min
Mar 15, 5:09 PM EDT	Special Weather Statement	FFC	Cobb, Douglas	36 min
Mar 15, 5:12 PM EDT	Special Weather Statement	FFC	Cherokee	33 min
Mar 15, 5:19 PM EDT	Special Weather Statement	FFC	Gwinnett	26 min
Mar 15, 5:22 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Paulding	23 min
Mar 15, 5:46 PM EDT	Special Weather Statement	FFC	Forsyth	29 min
Mar 15, 5:49 PM EDT	Special Weather Statement	FFC	Douglas, Paulding	26 min
Mar 15, 5:57 PM EDT	Special Weather Statement	FFC	Cherokee	33 min
Mar 15, 6:06 PM EDT	Special Weather Statement	FFC	Bartow	24 min
Mar 15, 6:11 PM EDT	Special Weather Statement	FFC	Douglas, Paulding, Polk	34 min
Mar 15, 6:12 PM EDT	Special Weather Statement	FFC	Forsyth	33 min
Mar 15, 6:23 PM EDT	Special Weather Statement	FFC	Cherokee	37 min
Mar 15, 6:27 PM EDT	Special Weather Statement	FFC	Polk	33 min
Mar 15, 6:41 PM EDT	Severe Thunderstorm Warning	FFC	Paulding, Polk	34 min
Mar 15, 6:48 PM EDT	Special Weather Statement	FFC	Bartow	27 min
Mar 15, 7:09 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Floyd, Polk	36 min
Mar 15, 7:32 PM EDT	Special Weather Statement	FFC	Gordon	28 min
Mar 15, 7:35 PM EDT	Special Weather Statement	FFC	Pickens	25 min
Mar 15, 7:43 PM EDT	Special Weather Statement	FFC	Bartow	32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2012 Every severe thunderstorm warning in 2012

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.