Alert archive / Georgia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 430, NWS Atlanta, GA

July 21, 2008Bibb County, Twiggs County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 21, 2008, 7:00 PM EDT for Bibb County, Twiggs County, Georgia. It was in force for 45 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: Jul 21, 2008, 7:00 PM EDT (23:00 UTC)
Expired: Jul 21, 2008, 7:45 PM EDT
In force: 45 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon

Counties Bibb County, GA, Twiggs County, GA

The radar

The Robins AFB radar (KJGX), 16 km from the middle of the area, began a volume at 23:02 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
Jul 21, 7:10 PM EDT	HAIL 0.75	Dry Branch, GA	DIME TO PENNY SIZED HAIL REPORTED IN DRY BRANCH.

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, 11.0 hours before the alert went out and 121 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: 1330 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1378 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 28 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 212300
SVRFFC
GAC021-289-212345-
/O.NEW.KFFC.SV.W.0430.080721T2300Z-080721T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
700 PM EDT MON JUL 21 2008

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BIBB COUNTY IN CENTRAL GEORGIA
  TWIGGS COUNTY IN CENTRAL GEORGIA

* UNTIL 745 PM EDT

* AT 700 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 DRY
  BRANCH...MOVING SOUTHWEST AT 7 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HUBER...RUTLAND...SKIPPERTON...TARVERSVILLE AND BULLARD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

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 3249 8349 3252 8352 3265 8354 3267 8364
      3277 8372 3281 8359 3288 8341 3262 8326
TIME...MOT...LOC 2300Z 028DEG 6KT 3273 8347

$$

1 follow-up statement

000 
WWUS52 KFFC 212314
SVSFFC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
712 PM EDT MON JUL 21 2008

GAC021-289-212345-
/O.CON.KFFC.SV.W.0430.000000T0000Z-080721T2345Z/
TWIGGS GA-BIBB GA-
712 PM EDT MON JUL 21 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHEASTERN BIBB AND TWIGGS COUNTIES...

AT 712 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED
HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED NEAR
FITZPATRICK...MOVING WEST AT 7 MPH. STRONG WINDS ASSOCIATED WITH 
ARE EXPECTED IN THE MACON AREA WHERE THERE MAY BE SOME DAMAGE TO 
TREES AND SIGNS. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TARVERSVILLE...BULLARD...SKIPPERTON...RUTLAND AND HUBER.

IF YOU SEE WIND DAMAGE...LARGE HAIL OR SIGNIFICANT FLOODING...WAIT
UNTIL AFTER 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 3249 8349 3252 8352 3265 8354 3267 8364
      3277 8372 3281 8359 3288 8341 3262 8326
TIME...MOT...LOC 2312Z 074DEG 6KT 3273 8350

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 2:18 PM EDT	Severe Thunderstorm Warning	FFC	Chattahoochee, Stewart, Webster	42 min
Jul 21, 4:44 PM EDT	Severe Thunderstorm Warning	FFC	Hancock, Taliaferro, Warren	31 min
Jul 21, 6:26 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Walker, Whitfield	34 min
Jul 21, 6:31 PM EDT	Severe Thunderstorm Warning	FFC	Twiggs, Wilkinson	29 min
Jul 21, 6:41 PM EDT	Severe Thunderstorm Warning	FFC	Dade, Walker	34 min
Jul 21, 6:49 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Pulaski	26 min
Jul 21, 7:19 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Pulaski	26 min
Jul 21, 7:23 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Murray, Whitfield	52 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2008 Every severe thunderstorm warning in 2008

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.