Alert archive / Georgia / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 466

June 30, 20074 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 30, 2007, 1:46 PM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2007, 1:46 PM CDT (18:46 UTC)
Expired: Jun 30, 2007, 7:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 174 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Baldwin County, GA, Ben Hill County, GA, Berrien County, GA, Bibb County, GA, Bleckley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Butts County, GA, Calhoun County, GA, Candler County, GA, Chatham County, GA, Chattahoochee County, GA, Clarke County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Columbia County, GA, Cook County, GA, Crawford County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Effingham County, GA, Elbert County, GA, Emanuel County, GA, Evans County, GA, Franklin County, GA, Glascock County, GA, Grady County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Hart County, GA, Houston County, GA, Irwin County, GA, Jasper County, GA, Jeff Davis County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Lincoln County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Madison County, GA, Marion County, GA, McDuffie County, GA, McIntosh County, GA, Meriwether County, GA, Miller County, GA, Mitchell County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Muscogee County, GA, Oconee County, GA, Oglethorpe County, GA, Peach County, GA, Pierce County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Quitman County, GA, Randolph County, GA, Richmond County, GA, Schley County, GA, Screven County, GA, Seminole County, GA, Spalding County, GA, Stephens County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Turner County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Worth County, GA, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Georgetown County, SC, Greenville County, SC, Greenwood County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC

The radar

The Robins AFB radar (KJGX), 35 km from the middle of the area, began a volume at 18:46 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 5%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 5%
Ten or more severe hail reports: 20%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 30, 1:50 PM CDT	Severe Thunderstorm Warning	TAE	Leon	25 min
Jun 30, 2:06 PM CDT	Severe Thunderstorm Warning	GSP	Anderson	69 min
Jun 30, 2:18 PM CDT	Severe Thunderstorm Warning	CHS	Hampton	42 min
Jun 30, 2:29 PM CDT	Severe Thunderstorm Warning	CAE	Burke	30 min
Jun 30, 2:29 PM CDT	Severe Thunderstorm Warning	GSP	Oconee	37 min
Jun 30, 2:35 PM CDT	Severe Thunderstorm Warning	GSP	Greenville	70 min
Jun 30, 2:38 PM CDT	Severe Thunderstorm Warning	CAE	Calhoun	29 min
Jun 30, 2:43 PM CDT	Severe Thunderstorm Warning	TAE	Wakulla	32 min
Jun 30, 2:49 PM CDT	Severe Thunderstorm Warning	CAE	Orangeburg	41 min
Jun 30, 2:56 PM CDT	Severe Thunderstorm Warning	CHS	Hampton	49 min
Jun 30, 2:59 PM CDT	Severe Thunderstorm Warning	GSP	York	27 min
Jun 30, 3:03 PM CDT	Severe Thunderstorm Warning	TAE	Grady	27 min
Jun 30, 3:14 PM CDT	Severe Thunderstorm Warning	GSP	Laurens	76 min
Jun 30, 3:22 PM CDT	Severe Thunderstorm Warning	GSP	Greenville	53 min
Jun 30, 3:34 PM CDT	Severe Thunderstorm Warning	FFC	Dooly	29 min
Jun 30, 3:35 PM CDT	Severe Thunderstorm Warning	CHS	Effingham, Screven	55 min
Jun 30, 3:58 PM CDT	Severe Thunderstorm Warning	ILM	Dillon	47 min
Jun 30, 4:15 PM CDT	Severe Thunderstorm Warning	CHS	Bulloch	45 min
Jun 30, 4:22 PM CDT	Severe Thunderstorm Warning	CHS	Berkeley	53 min
Jun 30, 4:24 PM CDT	Severe Thunderstorm Warning	ILM	Horry	45 min
Jun 30, 4:32 PM CDT	Severe Thunderstorm Warning	CAE	Newberry	58 min
Jun 30, 4:35 PM CDT	Severe Thunderstorm Warning	CHS	Jasper	55 min
Jun 30, 5:20 PM CDT	Severe Thunderstorm Warning	FFC	Stewart, Webster	40 min
Jun 30, 5:32 PM CDT	Severe Thunderstorm Warning	CAE	Edgefield	43 min
Jun 30, 5:42 PM CDT	Severe Thunderstorm Warning	FFC	Marion	48 min
Jun 30, 6:41 PM CDT	Severe Thunderstorm Warning	FFC	Jefferson	49 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.8 hours before the alert went out and 149 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: 195 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 11:47 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Butler and 49 more	88 min
Jun 30, 12:07 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 44 more	7 hr
Jun 30, 6:21 PM CDT	Mesoscale Discussion	SPC	Coffee, Dale, Geneva, Henry, Houston	24 min
Jun 30, 6:39 PM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 45 more	36 min
Jun 30, 12:19 PM CDT	Mesoscale Discussion	SPC	Appling, Bacon, Baldwin, Banks, Barrow, Ben Hill and 69 more	86 min

Nearby

Severe Thunderstorm Watches in Georgia, 2007 Severe Thunderstorm Watches in South Carolina, 2007 Severe Thunderstorm Watches in Florida, 2007 Every severe thunderstorm watch 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.