Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 70, NWS Atlanta, GA

March 31, 2012Bartow County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 31, 2012, 6:56 PM EDT for Bartow County, Georgia. It was in force for 49 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: Mar 31, 2012, 6:56 PM EDT (22:56 UTC)
Expired: Mar 31, 2012, 7:45 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Bartow County, GA

The radar

The Atlanta radar (KFFC), 110 km from the middle of the area, began a volume at 22:58 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 31, 7:15 PM EDT	HAIL 1.75	2 Nnw White, GA	PUBLIC REPORTED GROUND COVERED WITH HAIL UP TO THE SIZE OF GOLF BALLS OFF RICHARDS ROAD IN BARTOW COUNTY. HAIL REPORTED BETWEEN 715 PM EDT AND 730 PM EDT.

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, 10.9 hours before the alert went out and 111 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: 399 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

935 
WUUS52 KFFC 312256
SVRFFC
GAC015-312345-
/O.NEW.KFFC.SV.W.0070.120331T2256Z-120331T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
656 PM EDT SAT MAR 31 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BARTOW COUNTY IN NORTHWEST GEORGIA

* UNTIL 745 PM EDT

* AT 655 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM CAPABLE
  OF PRODUCING QUARTER SIZED HAIL.  THIS STORM WAS LOCATED 11 MILES
  NORTHWEST OF WHITE...MOVING SOUTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FOLSOM...FUNKHOUSER...PINE LOG AND RED TOP MOUNTAIN STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHWESTERN GEORGIA.

&&

LAT...LON 3440 8474 3442 8473 3441 8466 3440 8465
      3436 8466 3435 8464 3435 8466 3415 8466
      3414 8470 3439 8496 3440 8495
TIME...MOT...LOC 2256Z 306DEG 15KT 3442 8483

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 9:24 PM EDT	Special Weather Statement	FFC	Forsyth	36 min
Mar 31, 7:49 AM EDT	Special Weather Statement	FFC	Chattahoochee	26 min
Mar 31, 7:51 AM EDT	Special Weather Statement	FFC	Chattahoochee	24 min
Mar 31, 4:47 PM EDT	Special Weather Statement	FFC	Catoosa, Whitfield	28 min
Mar 31, 5:14 PM EDT	Special Weather Statement	FFC	Catoosa, Whitfield	31 min
Mar 31, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Whitfield	46 min
Mar 31, 5:48 PM EDT	Special Weather Statement	FFC	Floyd	27 min
Mar 31, 6:12 PM EDT	Severe Thunderstorm Warning	FFC	Gordon, Murray	37 min
Mar 31, 6:27 PM EDT	Severe Thunderstorm Warning	FFC	Gordon, Murray, Whitfield	48 min
Mar 31, 7:02 PM EDT	Special Weather Statement	FFC	Hall	28 min
Mar 31, 7:26 PM EDT	Special Weather Statement	FFC	Hall	34 min
Mar 31, 7:31 PM EDT	Special Weather Statement	FFC	Whitfield	29 min
Mar 31, 7:46 PM EDT	Special Weather Statement	FFC	Cherokee	29 min
Mar 31, 7:54 PM EDT	Special Weather Statement	FFC	Jackson	36 min
Mar 31, 7:56 PM EDT	Special Weather Statement	FFC	Gordon	34 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.