Alert archive / Georgia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 404, NWS Atlanta, GA

August 5, 2009Bibb County, Jones County, Twiggs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Aug 5, 2009, 3:26 PM EDT for Bibb County, Jones County, Twiggs 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: Aug 5, 2009, 3:26 PM EDT (19:26 UTC)
Expired: Aug 5, 2009, 4:15 PM EDT
In force: 49 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bibb County, GA, Jones County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 26 km from the middle of the area, began a volume at 19:28 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
Aug 5, 3:28 PM EDT	TSTM WND DMG	3 Ne Macon, GA	SEVERAL TREES DOWN IN THE NORTHEASTERN PORTION OF THE COUNTY.

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, 7.4 hours before the alert went out and 109 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: 2691 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -62 m²/s²
0-3 km storm-relative helicity: -31 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.

000 
WUUS52 KFFC 051926
SVRFFC
GAC021-169-289-052015-
/O.NEW.KFFC.SV.W.0404.090805T1926Z-090805T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
326 PM EDT WED AUG 5 2009

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BIBB COUNTY IN CENTRAL GEORGIA
  SOUTHERN JONES COUNTY IN CENTRAL GEORGIA
  NORTH CENTRAL TWIGGS COUNTY IN CENTRAL GEORGIA

* UNTIL 415 PM EDT

* AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL...AND
  DAMAGING WINDS UP TO 60 MPH.  THIS STORM WAS LOCATED NEAR MACON...
  MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  POSTELL...FRANKLINTON...JAMES...GRISWOLDVILLE...DRY BRANCH...
  GREENBERRY CROSSROADS...MOUNTAIN SPRINGS...FITZPATRICK AND RIPLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT 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.

&&

LAT...LON 3282 8371 3297 8366 3297 8337 3296 8337
      3292 8336 3289 8341 3283 8337 3272 8340
TIME...MOT...LOC 1926Z 283DEG 13KT 3289 8358

$$

1 follow-up statement

000 
WWUS52 KFFC 052008
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
408 PM EDT WED AUG 5 2009

GAC021-169-289-052017-
/O.EXP.KFFC.SV.W.0404.000000T0000Z-090805T2015Z/
TWIGGS GA-BIBB GA-JONES GA-
408 PM EDT WED AUG 5 2009

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JONES...NORTHEASTERN 
BIBB AND NORTH CENTRAL TWIGGS COUNTIES WILL BE ALLOWED TO EXPIRE AT 
415 PM EDT...

THE THUNDERSTORM THAT EARLIER PROMPTED THE WARNING IN THIS AREA HAS 
WEAKENED AND IS NO LONGER SEVERE.

LAT...LON 3282 8371 3297 8366 3297 8337 3296 8337
      3292 8336 3289 8341 3283 8337 3272 8340
TIME...MOT...LOC 2007Z 283DEG 13KT 3286 8341

$$



19

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 8:53 PM EDT	Severe Thunderstorm Warning	FFC	Gwinnett	23 min
Aug 4, 9:03 PM EDT	Severe Thunderstorm Warning	FFC	Walton	57 min
Aug 5, 1:56 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Madison, Oglethorpe	49 min
Aug 5, 2:26 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Washington, Wilkinson	31 min
Aug 5, 2:50 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Macon, Schley	26 min
Aug 5, 4:54 PM EDT	Severe Thunderstorm Warning	FFC	Laurens, Treutlen	36 min
Aug 5, 5:16 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel	44 min
Aug 5, 6:09 PM EDT	Severe Thunderstorm Warning	FFC	Taylor	51 min
Aug 5, 6:13 PM EDT	Severe Thunderstorm Warning	FFC	Crawford, Monroe	38 min
Aug 5, 6:57 PM EDT	Severe Thunderstorm Warning	FFC	Bibb	33 min
Aug 5, 7:53 PM EDT	Severe Thunderstorm Warning	FFC	Warren	52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2009 Every severe thunderstorm warning in 2009

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.