Alert archive / Georgia / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 838

August 4, 20037 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 4, 2003, 7:10 PM EDT for 7 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Aug 4, 2003, 7:10 PM EDT (23:10 UTC)
Expired: Aug 5, 2003, 12:00 AM EDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 87 counties

Banks County, GA, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Gilmer County, GA, Gordon County, GA, Habersham County, GA, Hall County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Bell County, KY, Harlan County, KY, Knott County, KY, Leslie County, KY, Letcher County, KY, Perry County, KY, Pike County, KY, Ashe County, NC, Avery County, NC, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, Mitchell County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Yancey County, NC, Oconee County, SC, Anderson County, TN, Blount County, TN, Bradley County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, McMinn County, TN, Monroe County, TN, Polk County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Bland County, VA, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Giles County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, McDowell County, WV, Mercer County, WV

The radar

The Knoxville radar (KMRX), 81 km from the middle of the area, began a volume at 23:10 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Aug 4, 7:11 PM EDT	Severe Thunderstorm Warning	MRX	Anderson	49 min
Aug 4, 7:13 PM EDT	Severe Thunderstorm Warning	MRX	Greene	47 min
Aug 4, 7:30 PM EDT	Severe Thunderstorm Warning	FFC	Gordon	30 min
Aug 4, 7:47 PM EDT	Severe Thunderstorm Warning	MRX	Knox	28 min
Aug 4, 7:54 PM EDT	Flash Flood Warning	FFC	Walker	2 hr
Aug 4, 7:59 PM EDT	Severe Thunderstorm Warning	GSP	Henderson	76 min
Aug 4, 8:00 PM EDT	Severe Thunderstorm Warning	GSP	Henderson	75 min
Aug 4, 8:06 PM EDT	Flash Flood Warning	GSP	Buncombe, Henderson	3 hr
Aug 4, 8:11 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan, Washington	49 min
Aug 4, 8:18 PM EDT	Severe Thunderstorm Warning	GSP	Rabun	57 min
Aug 4, 8:36 PM EDT	Severe Thunderstorm Warning	FFC	Bartow	24 min
Aug 4, 9:01 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee	29 min
Aug 4, 9:02 PM EDT	Severe Thunderstorm Warning	MRX	Scott	43 min
Aug 4, 9:13 PM EDT	Severe Thunderstorm Warning	FFC	Banks	32 min
Aug 4, 9:19 PM EDT	Severe Thunderstorm Warning	GSP	Franklin, Stephens	56 min
Aug 4, 9:32 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Cobb	28 min
Aug 4, 9:39 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Hall, Jackson	36 min
Aug 4, 9:39 PM EDT	Severe Thunderstorm Warning	MRX	Washington	66 min
Aug 4, 10:03 PM EDT	Severe Thunderstorm Warning	MRX	Greene	42 min
Aug 4, 10:15 PM EDT	Severe Thunderstorm Warning	MRX	Washington	45 min
Aug 4, 10:18 PM EDT	Severe Thunderstorm Warning	FFC	Banks, Hall, Jackson, Madison	42 min
Aug 4, 10:21 PM EDT	Flash Flood Warning	RNK	Tazewell	3 hr
Aug 4, 10:27 PM EDT	Severe Thunderstorm Warning	MRX	Russell	63 min
Aug 4, 10:39 PM EDT	Flash Flood Warning	FFC	Banks	2 hr

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, 11.2 hours before the alert went out and 246 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: 412 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 774 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 6:43 PM EDT	Mesoscale Discussion	SPC	Dawson, Fannin, Gilmer, Gordon, Habersham, Lumpkin and 7 more	2 hr
Aug 4, 1:52 PM EDT	Mesoscale Discussion	SPC	Adair, Anderson, Bath, Bourbon, Boyle, Bracken and 44 more	113 min
Aug 4, 2:43 PM EDT	Mesoscale Discussion	SPC	Ballard, Calloway, Carlisle, Christian, Fulton, Graves and 7 more	2 hr
Aug 4, 3:40 PM EDT	Severe Thunderstorm Watch	SPC	Fulton, Hickman	6 hr

Nearby

Severe Thunderstorm Watches in Georgia, 2003 Severe Thunderstorm Watches in Tennessee, 2003 Severe Thunderstorm Watches in North Carolina, 2003 Every severe thunderstorm watch in 2003

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.