Alert archive / Georgia / Tornado Watches in 2009

Tornado Watch 135

April 10, 200959 counties in Georgia; 17 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Apr 10, 2009, 6:31 PM EDT for 59 counties in Georgia; 17 counties in South Carolina. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Apr 10, 2009, 6:31 PM EDT (22:31 UTC)
Expired: Apr 11, 2009, 2:00 AM EDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 76 counties

Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Butts County, GA, Chattahoochee County, GA, Columbia County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Elbert County, GA, Emanuel County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Harris County, GA, Hart County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Laurens County, GA, Lincoln County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Meriwether County, GA, Monroe County, GA, Montgomery County, GA, Morgan County, GA, Muscogee County, GA, Oglethorpe County, GA, Peach County, GA, Pike County, GA, Pulaski County, GA, Putnam County, GA, Richmond County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Troup County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Laurens County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Saluda County, SC, Spartanburg County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 100 km from the middle of the area, began a volume at 22:34 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: 50%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 50%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:05 PM EDT	Tornado Warning	GSP	Pickens	39 min
Apr 10, 7:08 PM EDT	Tornado Warning	GSP	Hart	56 min
Apr 10, 7:28 PM EDT	Tornado Warning	FFC	Clayton, Fayette, Henry, Spalding	45 min
Apr 10, 7:42 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Spartanburg	63 min
Apr 10, 7:50 PM EDT	Tornado Warning	FFC	Clarke, Jackson, Madison, Oglethorpe	40 min
Apr 10, 7:50 PM EDT	Severe Thunderstorm Warning	GSP	Elbert, Hart	40 min
Apr 10, 7:56 PM EDT	Tornado Warning	GSP	Elbert	49 min
Apr 10, 7:56 PM EDT	Tornado Warning	GSP	Anderson, Greenville, Laurens	49 min
Apr 10, 8:01 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Newton	44 min
Apr 10, 8:01 PM EDT	Tornado Warning	GSP	Abbeville, Anderson	44 min
Apr 10, 8:07 PM EDT	Severe Thunderstorm Warning	FFC	Fayette, Spalding	53 min
Apr 10, 8:12 PM EDT	Tornado Warning	GSP	Abbeville	48 min
Apr 10, 8:18 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	42 min
Apr 10, 8:20 PM EDT	Severe Thunderstorm Warning	FFC	Jasper, Morgan, Putnam	55 min
Apr 10, 8:23 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Madison, Oglethorpe	52 min
Apr 10, 8:23 PM EDT	Severe Thunderstorm Warning	GSP	Union	31 min
Apr 10, 8:29 PM EDT	Severe Thunderstorm Warning	CAE	Lincoln	46 min
Apr 10, 8:34 PM EDT	Severe Thunderstorm Warning	GSP	Greenwood, Laurens	37 min
Apr 10, 8:39 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Clayton, Henry	55 min
Apr 10, 8:41 PM EDT	Tornado Warning	GSP	Greenwood	34 min
Apr 10, 8:46 PM EDT	Tornado Warning	FFC	Jasper, Putnam	35 min
Apr 10, 8:46 PM EDT	Severe Thunderstorm Warning	GSP	Chester, Union, York	59 min
Apr 10, 8:54 PM EDT	Tornado Warning	FFC	Butts, Henry, Spalding	51 min
Apr 10, 8:54 PM EDT	Severe Thunderstorm Warning	CAE	Edgefield, Saluda	51 min
Apr 10, 9:02 PM EDT	Tornado Warning	FFC	Chattahoochee, Muscogee	58 min
Apr 10, 9:13 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Hancock, Taliaferro, Warren	47 min
Apr 10, 9:19 PM EDT	Tornado Warning	FFC	Jasper	41 min
Apr 10, 9:24 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington, Newberry, Richland	51 min
Apr 10, 9:32 PM EDT	Tornado Warning	FFC	Hancock, Warren	43 min
Apr 10, 9:35 PM EDT	Tornado Warning	FFC	Greene, Morgan, Oconee, Oglethorpe	40 min
Apr 10, 9:45 PM EDT	Tornado Warning	FFC	Jasper, Putnam	32 min
Apr 10, 9:48 PM EDT	Severe Thunderstorm Warning	CAE	Columbia, McDuffie, Richmond	42 min
Apr 10, 9:57 PM EDT	Tornado Warning	FFC	Chattahoochee, Marion	34 min
Apr 10, 9:57 PM EDT	Tornado Warning	FFC	Baldwin, Jones	19 min
Apr 10, 10:05 PM EDT	Tornado Warning	FFC	Hancock	40 min
Apr 10, 10:06 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Fairfield, Kershaw, Lee, Richland, Sumter	24 min
Apr 10, 10:07 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Henry, Jasper, Newton	68 min
Apr 10, 10:13 PM EDT	Severe Thunderstorm Warning	FFC	Greene, Jasper, Morgan, Newton, Putnam, Walton	62 min
Apr 10, 10:18 PM EDT	Tornado Warning	FFC	Macon, Schley, Sumter	42 min
Apr 10, 10:26 PM EDT	Tornado Warning	FFC	Chattahoochee, Stewart	64 min
Apr 10, 10:29 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Hancock, Warren, Washington	61 min
Apr 10, 10:30 PM EDT	Tornado Warning	CAE	Columbia, Richmond	30 min
Apr 10, 10:34 PM EDT	Tornado Warning	FFC	Butts, Jasper, Newton	30 min
Apr 10, 10:42 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Henry, Jasper, Lamar, Monroe, Spalding	48 min
Apr 10, 10:49 PM EDT	Tornado Warning	FFC	Baldwin, Hancock, Putnam	56 min
Apr 10, 10:50 PM EDT	Tornado Warning	FFC	Crisp, Dooly, Macon, Sumter	55 min
Apr 10, 10:52 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson, Washington	37 min
Apr 10, 10:56 PM EDT	Severe Thunderstorm Warning	FFC	Glascock, Greene, Hancock, Taliaferro, Warren	64 min
Apr 10, 11:00 PM EDT	Tornado Warning	FFC	Marion, Stewart, Webster	45 min
Apr 10, 11:22 PM EDT	Severe Thunderstorm Warning	FFC	Butts, Jasper, Jones, Monroe	53 min
Apr 10, 11:27 PM EDT	Severe Thunderstorm Warning	FFC	Stewart	48 min
Apr 10, 11:31 PM EDT	Tornado Warning	FFC	Pulaski, Wilcox	44 min
Apr 10, 11:33 PM EDT	Tornado Warning	FFC	Sumter	57 min
Apr 10, 11:38 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Glascock, Hancock, Jefferson, Washington	67 min
Apr 10, 11:38 PM EDT	Tornado Warning	FFC	Stewart	37 min
Apr 10, 11:44 PM EDT	Severe Thunderstorm Warning	FFC	Baldwin, Washington, Wilkinson	61 min
Apr 10, 11:53 PM EDT	Severe Thunderstorm Warning	FFC	Dodge	36 min
Apr 10, 11:53 PM EDT	Tornado Warning	FFC	Glascock, Jefferson, Warren	37 min
Apr 10, 11:59 PM EDT	Tornado Warning	FFC	Webster	32 min
Apr 11, 12:13 AM EDT	Severe Thunderstorm Warning	FFC	Telfair, Wheeler	36 min
Apr 11, 12:16 AM EDT	Tornado Warning	FFC	Crisp	45 min
Apr 11, 12:44 AM EDT	Severe Thunderstorm Warning	FFC	Jefferson	18 min
Apr 11, 12:44 AM EDT	Tornado Warning	FFC	Wilcox	40 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, 10.5 hours before the alert went out and 181 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 292 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
Apr 10, 5:25 AM EDT	Mesoscale Discussion	SPC	Bartow, Catoosa, Chattooga, Dade, Floyd, Gordon and 6 more	95 min
Apr 10, 8:04 AM EDT	Mesoscale Discussion	SPC	Banks, Bartow, Chattooga, Cherokee, Cobb, Dawson and 23 more	86 min
Apr 10, 12:23 PM EDT	Tornado Watch PDS	SPC	Catoosa, Chattooga, Dade, Walker, Whitfield	8 hr
Apr 10, 3:29 PM EDT	Mesoscale Discussion	SPC	Banks, Barrow, Bartow, Butts, Carroll, Cherokee and 36 more	91 min
Apr 10, 3:39 PM EDT	Tornado Watch PDS	SPC	Banks, Barrow, Bartow, Carroll, Cherokee, Clarke and 36 more	8 hr
Apr 10, 4:43 PM EDT	Mesoscale Discussion	SPC	Bartow, Carroll, Chattooga, Cherokee, Cobb, Dawson and 13 more	92 min
Apr 10, 6:11 PM EDT	Mesoscale Discussion	SPC	Baldwin, Bibb, Butts, Clarke, Columbia, Crawford and 32 more	64 min
Apr 10, 7:34 PM EDT	Mesoscale Discussion	SPC	Baldwin, Banks, Barrow, Bartow, Bibb, Butts and 60 more	56 min

Nearby

Tornado Watches in Georgia, 2009 Tornado Watches in South Carolina, 2009 Every tornado watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.