Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS Atlanta, GA

April 3, 2012Barrow County, Jackson County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 3, 2012, 4:27 PM EDT for Barrow County, Jackson County, Georgia. It was in force for 16 min. 1 report 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 3, 2012, 4:27 PM EDT (20:27 UTC)
Expired: Apr 3, 2012, 4:43 PM EDT
In force: 16 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Barrow County, GA, Jackson County, GA

The radar

The Atlanta radar (KFFC), 124 km from the middle of the area, began a volume at 20:27 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 3, 4:32 PM EDT	HAIL 1	5 Wsw 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 12:00Z, 8.5 hours before the alert went out and 119 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: 857 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 5 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.

297 
WUUS52 KFFC 032027
SVRFFC
GAC013-157-032115-
/O.NEW.KFFC.SV.W.0073.120403T2027Z-120403T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
427 PM EDT TUE APR 3 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

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

* UNTIL 515 PM EDT

* AT 423 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 6 MILES
  SOUTHWEST OF JEFFERSON...MOVING EAST AT 10 MPH.

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

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 3412 8337 3398 8352 3405 8377 3417 8371
TIME...MOT...LOC 2027Z 283DEG 11KT 3408 8366

$$

1 follow-up statement

811 
WWUS52 KFFC 032043
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
443 PM EDT TUE APR 3 2012

GAC013-157-032053-
/O.CAN.KFFC.SV.W.0073.000000T0000Z-120403T2115Z/
BARROW GA-JACKSON GA-
443 PM EDT TUE APR 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JACKSON AND
NORTHEASTERN BARROW COUNTIES IS CANCELLED...

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
JEFFERSON...ARCADE...BEAR CREEK RESERVOIR AND NICHOLSON.

THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER EXPECTED TO PRODUCE
SEVERE WEATHER. HOWEVER...STRONG GUSTY WINDS UP TO 45 MPH...VERY
HEAVY RAIN...AND SMALL HAIL ARE STILL POSSIBLE WITH THIS STORM.

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 3412 8337 3398 8352 3405 8377 3417 8371
TIME...MOT...LOC 2043Z 283DEG 11KT 3407 8360

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 12:44 PM EDT	Special Weather Statement	FFC	Fannin	31 min
Apr 3, 12:46 PM EDT	Special Weather Statement	FFC	Lumpkin	29 min
Apr 3, 1:13 PM EDT	Special Weather Statement	FFC	Cherokee	32 min
Apr 3, 1:15 PM EDT	Special Weather Statement	FFC	Lumpkin, Union	30 min
Apr 3, 1:38 PM EDT	Special Weather Statement	FFC	Cherokee, Dawson, Fannin, Gilmer, Lumpkin, Pickens and 2 more	37 min
Apr 3, 2:15 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin, Towns, Union	30 min
Apr 3, 2:43 PM EDT	Special Weather Statement	FFC	Dawson, Lumpkin, Towns, Union, White	32 min
Apr 3, 3:09 PM EDT	Special Weather Statement	FFC	Dawson, Forsyth, Hall, Lumpkin, Towns, White	36 min
Apr 3, 3:41 PM EDT	Special Weather Statement	FFC	Hall	34 min
Apr 3, 4:03 PM EDT	Severe Thunderstorm Warning	FFC	Hall, Jackson	42 min
Apr 3, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Banks	21 min
Apr 3, 6:19 PM EDT	Special Weather Statement	FFC	Barrow, Clarke	26 min
Apr 3, 6:41 PM EDT	Special Weather Statement	FFC	Barrow, Clarke, Oconee, Oglethorpe	34 min
Apr 3, 7:23 PM EDT	Special Weather Statement	FFC	Barrow, Clarke	37 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.