Alert archive / Georgia / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 98, NWS Atlanta, GA

May 6, 2012Cobb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at May 6, 2012, 7:32 PM EDT for Cobb County, Georgia. It was in force for 43 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: May 6, 2012, 7:32 PM EDT (23:32 UTC)
Expired: May 6, 2012, 8:15 PM EDT
In force: 43 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

County Cobb County, GA

The radar

The Atlanta radar (KFFC), 59 km from the middle of the area, began a volume at 23:32 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
May 6, 7:37 PM EDT	HAIL 1	Kennesaw, GA	PUBLIC REPORTED QUARTER SIZE HAIL NEAR KENNESAW. THE HAIL OCCURRED FOR APPROXIMATELY 10 MINUTES.

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, 11.5 hours before the alert went out and 59 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: 1435 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -41 m²/s²
0-3 km storm-relative helicity: -30 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.

825 
WUUS52 KFFC 062332
SVRFFC
GAC067-070015-
/O.NEW.KFFC.SV.W.0098.120506T2332Z-120507T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
732 PM EDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COBB COUNTY IN NORTH CENTRAL GEORGIA

* UNTIL 815 PM EDT

* AT 732 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZED HAIL.  THIS
  STORM WAS LOCATED NEAR MARIETTA...MOVING SOUTH AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  AUSTELL...POWDER SPRINGS AND SMYRNA.

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 3407 8465 3403 8444 3383 8446 3381 8448
      3379 8462 3380 8463 3381 8472 3382 8473
      3387 8473
TIME...MOT...LOC 2333Z 016DEG 4KT 3396 8457

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 9:02 PM EDT	Special Weather Statement	FFC	Heard	28 min
May 6, 10:15 AM EDT	Special Weather Statement	FFC	Heard	30 min
May 6, 10:37 AM EDT	Severe Thunderstorm Warning	FFC	Heard	23 min
May 6, 11:04 AM EDT	Special Weather Statement	FFC	Troup	26 min
May 6, 11:59 AM EDT	Special Weather Statement	FFC	Harris	46 min
May 6, 12:12 PM EDT	Special Weather Statement	FFC	Chattahoochee, Muscogee	48 min
May 6, 12:23 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	37 min
May 6, 12:43 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Muscogee	32 min
May 6, 1:10 PM EDT	Special Weather Statement	FFC	Marion	50 min
May 6, 1:38 PM EDT	Severe Thunderstorm Warning	FFC	Stewart, Webster	52 min
May 6, 1:50 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Schley	40 min
May 6, 6:17 PM EDT	Special Weather Statement	FFC	Polk	28 min
May 6, 6:19 PM EDT	Special Weather Statement	FFC	Pike	26 min
May 6, 6:26 PM EDT	Special Weather Statement	FFC	Pickens	34 min
May 6, 6:29 PM EDT	Special Weather Statement	FFC	Upson	31 min
May 6, 6:32 PM EDT	Special Weather Statement	FFC	Fulton	28 min
May 6, 6:34 PM EDT	Special Weather Statement	FFC	Walker	26 min
May 6, 6:38 PM EDT	Severe Thunderstorm Warning	FFC	Douglas, Fulton	52 min
May 6, 6:40 PM EDT	Special Weather Statement	FFC	Polk	35 min
May 6, 6:43 PM EDT	Special Weather Statement	FFC	Pike	32 min
May 6, 6:46 PM EDT	Severe Thunderstorm Warning	FFC	Pickens	44 min
May 6, 6:52 PM EDT	Special Weather Statement	FFC	Fayette	38 min
May 6, 6:55 PM EDT	Special Weather Statement	FFC	Cobb	35 min
May 6, 7:00 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Pickens	30 min
May 6, 7:07 PM EDT	Special Weather Statement	FFC	Upson	38 min
May 6, 7:18 PM EDT	Severe Thunderstorm Warning	FFC	Haralson, Polk	22 min
May 6, 7:19 PM EDT	Special Weather Statement	FFC	Crawford	26 min
May 6, 7:20 PM EDT	Special Weather Statement	FFC	Union	25 min
May 6, 7:22 PM EDT	Special Weather Statement	FFC	Cherokee	38 min
May 6, 7:25 PM EDT	Special Weather Statement	FFC	Cobb	35 min
May 6, 7:37 PM EDT	Special Weather Statement	FFC	Union	38 min
May 6, 7:41 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether, Pike, Upson	34 min
May 6, 7:51 PM EDT	Special Weather Statement	FFC	Peach	24 min
May 6, 7:55 PM EDT	Special Weather Statement	FFC	Cherokee	35 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.