Alert archive / Georgia / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 69, NWS Atlanta, GA

April 11, 2007Macon County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Apr 11, 2007, 9:10 PM EDT for Macon County, Georgia. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 11, 2007, 9:10 PM EDT (01:10 UTC)
Expired: Apr 11, 2007, 9:45 PM EDT
In force: 35 min
Issued by: NWS Atlanta, GA
Area: Counties, with a storm outline in the text

County Macon County, GA

The radar

The Robins AFB radar (KJGX), 84 km from the middle of the area, began a volume at 01:22 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 11, 4:48 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.2 hours before the alert went out and 127 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: 365 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 466 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KFFC 120110
SVRFFC
GAC193-120145-
/O.NEW.KFFC.SV.W.0069.070412T0110Z-070412T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
910 PM EDT WED APR 11 2007

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MACON COUNTY IN WEST CENTRAL GEORGIA

* UNTIL 945 PM EDT

* AT 909 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZED HAIL.  THIS
  STORM WAS LOCATED NEAR FOUNTAINVILEE...MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  OGLETHORPE AND MONTEZUMA.

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 3235 8425 3221 8417 3217 8403 3231 8385

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 8:08 PM EDT	Severe Thunderstorm Warning	FFC	Crisp, Wilcox	17 min
Apr 11, 8:17 PM EDT	Tornado Warning	FFC	Marion, Stewart, Webster	43 min
Apr 11, 8:35 PM EDT	Tornado Warning	FFC	Schley, Sumter	55 min
Apr 11, 8:49 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Treutlen	26 min
Apr 11, 10:54 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Morgan	36 min
Apr 11, 11:36 PM EDT	Severe Thunderstorm Warning	FFC	Morgan, Newton, Walton	39 min
Apr 12, 1:27 AM EDT	Severe Thunderstorm Warning	FFC	Warren	18 min
Apr 12, 1:35 AM EDT	Severe Thunderstorm Warning	FFC	Washington	25 min
Apr 12, 1:48 AM EDT	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 46 more	2 hr
Apr 12, 2:44 AM EDT	Severe Thunderstorm Warning	FFC	Jefferson	31 min
Apr 12, 5:05 AM EDT	Dense Fog Advisory	FFC	Banks, Barrow, Bartow, Butts, Carroll, Catoosa and 46 more	3 hr
Apr 12, 5:05 AM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Butts, Carroll and 56 more	13 hr
Apr 12, 6:03 AM EDT	Red Flag Warning	FFC	Baldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 38 more	14 hr

Nearby

Severe Thunderstorm Warnings in Georgia, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.