Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 28, NWS Atlanta, GA

February 22, 2012Hall County, Jackson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Feb 22, 2012, 11:32 PM EST for Hall County, Jackson County, Georgia. It was in force for 28 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: Feb 22, 2012, 11:32 PM EST (04:32 UTC)
Expired: Feb 23, 2012, 12:00 AM EST
In force: 28 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Hall County, GA, Jackson County, GA

The radar

The Atlanta radar (KFFC), 119 km from the middle of the area, began a volume at 04:32 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
Feb 22, 11:45 PM EST	TSTM WND DMG	2 Wsw Talmo, GA	JACKSON COUNTY 911 RELAYED A REPORT OF A DOWNED TREE ONTO A FENCE OFF HWY 60 NEAR THE JACKSON-HALL COUNTY LINE.
Feb 22, 11:45 PM EST	HAIL 1	Oakwood, GA	PUBLIC REPORTED NICKEL TO QUARTER SIZE HAIL OCCURRED FOR APPROXIMATELY TEN MINUTES IN THE OAKWOOD AREA.
Feb 22, 11:50 PM EST	HAIL 0.25	5 Wnw Jefferson, GA	JACKSON COUNTY 911 RELAYED OFFICER REPORTS OF NEARLY NO VISIBILITY DUE TO HEAVY RAINS AND HAIL OF UNKNOWN SIZE IN THE AREA OF HWY 129 AND I-85.
Feb 22, 11:50 PM EST	HAIL 0.88	Hoschton, GA	PUBLIC REPORTED NICKEL SIZE HAIL IN HOSCHTON.
Feb 22, 11:57 PM EST	HAIL 1	Jefferson, GA

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 00:00Z, 4.5 hours before the alert went out and 115 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: 13 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1264 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 362 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.

171 
WUUS52 KFFC 230432
SVRFFC
GAC139-157-230500-
/O.NEW.KFFC.SV.W.0028.120223T0432Z-120223T0500Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1132 PM EST WED FEB 22 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL MIDNIGHT EST

* AT 1132 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR FLOWERY
  BRANCH...MOVING EAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  OAKWOOD...BRASELTON...HOSCHTON...TALMO...PENDERGRASS...JEFFERSON...
  ARCADE...NICHOLSON AND COMMERCE.

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...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 3422 8342 3416 8336 3412 8335 3405 8339
      3404 8336 3400 8346 3409 8379 3412 8382
      3410 8386 3417 8405 3419 8405 3419 8399
      3422 8396 3428 8393 3432 8395
TIME...MOT...LOC 0433Z 285DEG 46KT 3422 8391

$$

1 follow-up statement

418 
WWUS52 KFFC 230448
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1148 PM EST WED FEB 22 2012

GAC139-157-230500-
/O.CON.KFFC.SV.W.0028.000000T0000Z-120223T0500Z/
HALL GA-JACKSON GA-
1148 PM EST WED FEB 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EST
FOR JACKSON AND SOUTHEASTERN HALL COUNTIES...

AT 1145 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
TALMO...MOVING EAST AT 55 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PENDERGRASS...JEFFERSON...PEACH STATE SPEEDWAY...ARCADE...CENTER...
NICHOLSON...APPLE VALLEY AND COMMERCE.

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 3422 8342 3416 8336 3413 8335 3405 8339
      3404 8336 3404 8339 3400 8346 3409 8379
      3412 8382 3410 8386 3428 8375
TIME...MOT...LOC 0448Z 285DEG 46KT 3417 8371

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 22, 7:44 PM EST	Special Weather Statement	FFC	Dade	46 min
Feb 22, 8:15 PM EST	Special Weather Statement	FFC	Catoosa	30 min
Feb 22, 8:24 PM EST	Special Weather Statement	FFC	Walker	51 min
Feb 22, 9:19 PM EST	Special Weather Statement	FFC	Walker, Whitfield	26 min
Feb 22, 9:41 PM EST	Special Weather Statement	FFC	Floyd	34 min
Feb 22, 9:53 PM EST	Severe Thunderstorm Warning	FFC	Floyd, Polk	37 min
Feb 22, 10:36 PM EST	Special Weather Statement	FFC	Bartow, Cherokee, Pickens	24 min
Feb 22, 11:10 PM EST	Special Weather Statement	FFC	Cobb	35 min
Feb 22, 11:24 PM EST	Special Weather Statement	FFC	Barrow, Forsyth, Hall	36 min
Feb 22, 11:52 PM EST	Severe Thunderstorm Warning	FFC	Barrow, Clarke, Hall, Jackson, Madison	23 min
Feb 23, 12:09 AM EST	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Madison, Oglethorpe	36 min
Feb 23, 12:46 AM EST	Special Weather Statement	FFC	Oglethorpe, Wilkes	29 min
Feb 23, 12:58 AM EST	Special Weather Statement	FFC	Lumpkin, White	32 min
Feb 23, 2:53 PM EST	Wind Advisory	FFC	Catoosa, Dade, Dawson, Fannin, Gilmer, Lumpkin and 6 more	28 hr

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.