Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 85, NWS Atlanta, GA

April 27, 2012Barrow County, Jackson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 27, 2012, 7:05 PM EDT for Barrow County, Jackson County, Georgia. It was in force for 25 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: Apr 27, 2012, 7:05 PM EDT (23:05 UTC)
Expired: Apr 27, 2012, 7:30 PM EDT
In force: 25 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Barrow County, GA, Jackson County, GA

The radar

The Atlanta radar (KFFC), 131 km from the middle of the area, began a volume at 23:04 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
Apr 27, 7:09 PM EDT	HAIL 0.88	Talmo, GA	LAW ENFORCEMENT REPORTED NICKEL SIZED HAIL NEAR TALMO.
Apr 27, 7:10 PM EDT	HAIL 0.88	Nicholson, GA	LAW ENFORCEMENT REPORTED NICKEL SIZE HAIL NEAR NICHOLSON IN FAR EASTERN JACKSON COUNTY.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 320 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: 540 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 550 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 180 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.

861 
WUUS52 KFFC 272305
SVRFFC
GAC013-157-272330-
/O.NEW.KFFC.SV.W.0085.120427T2305Z-120427T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
705 PM EDT FRI APR 27 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN BARROW COUNTY IN NORTH CENTRAL GEORGIA
  JACKSON COUNTY IN NORTHEAST GEORGIA

* UNTIL 730 PM EDT

* AT 700 PM EDT...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 TALMO...
  MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PENDERGRASS...JEFFERSON...ARCADE...MAYSVILLE...NICHOLSON AND
  COMMERCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND 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...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 3416 8336 3412 8335 3406 8339 3405 8380
      3414 8381 3425 8367 3426 8358 3425 8357
      3426 8348
TIME...MOT...LOC 2305Z 265DEG 24KT 3415 8370

$$

1 follow-up statement

541 
WWUS52 KFFC 272321
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
721 PM EDT FRI APR 27 2012

GAC013-272331-
/O.CAN.KFFC.SV.W.0085.000000T0000Z-120427T2330Z/
BARROW GA-
721 PM EDT FRI APR 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BARROW COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED OUT OF BARTOW COUNTY...AND THE 
WARNING HAS BEEN CANCELLED.

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 3416 8336 3412 8336 3406 8339 3406 8355
      3414 8369 3418 8376 3425 8367 3426 8358
      3425 8357 3426 8348
TIME...MOT...LOC 2321Z 265DEG 24KT 3416 8357

$$

GAC157-272330-
/O.CON.KFFC.SV.W.0085.000000T0000Z-120427T2330Z/
JACKSON GA-
721 PM EDT FRI APR 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR JACKSON COUNTY...

AT 718 PM EDT...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
PEACH STATE SPEEDWAY...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO APPLE
VALLEY...NICHOLSON 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 3416 8336 3412 8336 3406 8339 3406 8355
      3414 8369 3418 8376 3425 8367 3426 8358
      3425 8357 3426 8348
TIME...MOT...LOC 2321Z 265DEG 24KT 3416 8357

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 9:08 PM EDT	Special Weather Statement	FFC	Towns	37 min
Apr 27, 3:20 PM EDT	Special Weather Statement	FFC	Chattooga	25 min
Apr 27, 3:41 PM EDT	Special Weather Statement	FFC	Chattooga	34 min
Apr 27, 4:11 PM EDT	Special Weather Statement	FFC	Chattooga	34 min
Apr 27, 4:40 PM EDT	Severe Thunderstorm Warning	FFC	Chattooga, Floyd	35 min
Apr 27, 5:15 PM EDT	Special Weather Statement	FFC	Chattooga	30 min
Apr 27, 5:30 PM EDT	Special Weather Statement	FFC	Cobb	30 min
Apr 27, 5:54 PM EDT	Special Weather Statement	FFC	Forsyth	36 min
Apr 27, 6:30 PM EDT	Special Weather Statement	FFC	Gwinnett	30 min
Apr 27, 6:47 PM EDT	Special Weather Statement	FFC	Clarke	28 min
Apr 27, 7:07 PM EDT	Severe Thunderstorm Warning	FFC	Madison	38 min
Apr 27, 7:27 PM EDT	Special Weather Statement	FFC	Hall, Jackson	33 min
Apr 27, 7:46 PM EDT	Special Weather Statement	FFC	Madison	14 min
Apr 27, 7:54 PM EDT	Special Weather Statement	FFC	Madison	36 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.