Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 67, NWS Atlanta, GA

March 31, 2012Catoosa County, Whitfield County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 31, 2012, 5:44 PM EDT for Catoosa County, Whitfield County, Georgia. It was in force for 46 min. 4 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 31, 2012, 5:44 PM EDT (21:44 UTC)
Expired: Mar 31, 2012, 6:30 PM EDT
In force: 46 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Catoosa County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 107 km from the middle of the area, began a volume at 21:47 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, 5:47 PM EDT	HAIL 0.75	5 Ene Ringgold, GA	PUBLIC REPORTED DIME SIZED HAIL IN CATOOSA COUNTY. RADAR ESTIMATED TIME WAS 547 PM EDT. THUNDERSTORM LASTED FOR 10 MINUTES IN THE AREA.
Mar 31, 5:50 PM EDT	HAIL 0.75	Dalton, GA	NUMEROUS REPORTS OF PEA TO PENNY SIZE HAIL WERE RECEIVED FROM THE EMERGENCY MANAGER AND THE PUBLIC. REPORTS INDICATED HAIL BEGAN AROUND 550 PM IN THE TUNNEL HILL AREA...CONTINUED THROUGH THE DALTON...AND ENDED NEAR TUNNEL HILL AROUND 625 PM.
Mar 31, 5:50 PM EDT	HAIL 1	Dalton, GA	NUMEROUS REPORTS OF PEA TO PENNY SIZE HAIL WERE RECEIVED FROM THE EMERGENCY MANAGER AND THE PUBLIC. REPORTS INDICATED HAIL BEGAN AROUND 550 PM IN THE TUNNEL HILL AREA...CONTINUED THROUGH THE DALTON...AND ENDED NEAR TUNNEL HILL AROUND 625 PM.
Mar 31, 5:58 PM EDT	HAIL 1	4 Nw Dalton, GA	DRIVER REPORTS QUARTER SIZED HAIL ON INTERSTATE 75 IN WHITFIELD COUNTY AT 558 PM EDT.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 31, 1:47 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.7 hours before the alert went out and 163 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.

976 
WUUS52 KFFC 312144
SVRFFC
GAC047-313-312230-
/O.NEW.KFFC.SV.W.0067.120331T2144Z-120331T2230Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CATOOSA COUNTY IN NORTHWEST GEORGIA
  WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 630 PM EDT

* AT 542 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
  RINGGOLD...MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  COHUTTA...VARNELL...TUNNEL HILL AND DALTON.

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.

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

&&

LAT...LON 3490 8483 3487 8482 3481 8486 3480 8484
      3479 8487 3472 8485 3470 8489 3471 8494
      3467 8489 3468 8494 3464 8492 3463 8494
      3497 8519 3499 8515 3499 8492
TIME...MOT...LOC 2144Z 325DEG 15KT 3495 8503

$$

1 follow-up statement

072 
WWUS52 KFFC 312157
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
557 PM EDT SAT MAR 31 2012

GAC047-312207-
/O.CAN.KFFC.SV.W.0067.000000T0000Z-120331T2230Z/
CATOOSA GA-
557 PM EDT SAT MAR 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CATOOSA COUNTY IS
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.

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

LAT...LON 3489 8483 3481 8486 3480 8484 3479 8487
      3472 8485 3470 8489 3471 8494 3467 8489
      3468 8494 3464 8492 3463 8494 3482 8508
      3486 8506 3488 8501 3491 8502 3499 8498
      3499 8492
TIME...MOT...LOC 2157Z 324DEG 16KT 3488 8497

$$

GAC313-312230-
/O.CON.KFFC.SV.W.0067.000000T0000Z-120331T2230Z/
WHITFIELD GA-
557 PM EDT SAT MAR 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR WHITFIELD COUNTY...

AT 556 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
VARNELL...MOVING SOUTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROCKY
FACE...DALTON...DAWNVILLE AND TILTON.

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.

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

&&

LAT...LON 3489 8483 3481 8486 3480 8484 3479 8487
      3472 8485 3470 8489 3471 8494 3467 8489
      3468 8494 3464 8492 3463 8494 3482 8508
      3486 8506 3488 8501 3491 8502 3499 8498
      3499 8492
TIME...MOT...LOC 2157Z 324DEG 16KT 3488 8497

$$

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, 5:48 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, 6:56 PM EDT	Severe Thunderstorm Warning	FFC	Bartow	49 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.