Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 69, NWS Atlanta, GA

March 31, 2012Gordon County, Murray County, Whitfield County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Mar 31, 2012, 6:27 PM EDT for Gordon County, Murray County, Whitfield County, Georgia. It was in force for 48 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, 6:27 PM EDT (22:27 UTC)
Expired: Mar 31, 2012, 7:15 PM EDT
In force: 48 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Gordon County, GA, Murray County, GA, Whitfield County, GA

The radar

The Northeast Alabama radar (KHTX), 122 km from the middle of the area, began a volume at 22:29 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, 6:38 PM EDT	HAIL 1.75	2 Sse Calhoun, GA	NUMEROUS PUBLIC REPORTS WERE RECEIVED INDICATING QUARTER TO GOLF BALL SIZE HAIL FELL IN THE CALHOUN AREA BETWEEN 638 PM AND 650 PM. THE FIRST REPORTS WERE RECEIVED ALONG I-75...SOUTH OF CALHOUN...AND CONTINUED TO NEAR SONORAVILLE.

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, 10.5 hours before the alert went out and 135 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.

861 
WUUS52 KFFC 312227
SVRFFC
GAC129-213-313-312315-
/O.NEW.KFFC.SV.W.0069.120331T2227Z-120331T2315Z/

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

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GORDON COUNTY IN NORTHWEST GEORGIA
  SOUTHWESTERN MURRAY COUNTY IN NORTHWEST GEORGIA
  SOUTH CENTRAL WHITFIELD COUNTY IN NORTHWEST GEORGIA

* UNTIL 715 PM EDT

* AT 626 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 RESACA...
  MOVING SOUTH AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CALHOUN.

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 3465 8486 3460 8493 3451 8483 3461 8466
      3441 8466 3442 8473 3440 8474 3439 8496
      3469 8504 3470 8492
TIME...MOT...LOC 2227Z 344DEG 19KT 3462 8490

$$

1 follow-up statement

651 
WWUS52 KFFC 312252
SVSFFC

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

GAC213-313-312302-
/O.CAN.KFFC.SV.W.0069.000000T0000Z-120331T2315Z/
WHITFIELD GA-MURRAY GA-
652 PM EDT SAT MAR 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MURRAY AND SOUTH
CENTRAL WHITFIELD COUNTIES 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 3451 8492 3451 8477 3440 8474 3440 8495
TIME...MOT...LOC 2252Z 344DEG 19KT 3449 8486

$$

GAC129-312315-
/O.CON.KFFC.SV.W.0069.000000T0000Z-120331T2315Z/
GORDON GA-
652 PM EDT SAT MAR 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHERN GORDON COUNTY...

AT 650 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
SONORAVILLE...MOVING SOUTH AT 20 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

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 3451 8492 3451 8477 3440 8474 3440 8495
TIME...MOT...LOC 2252Z 344DEG 19KT 3449 8486

$$

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, 6:56 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.