Alert archive / Tennessee / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 718
The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2003, 5:50 PM EDT for 17 counties in North Carolina; 31 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 10, 2003, 5:50 PM EDT (21:50 UTC)
- Expired
- Jul 10, 2003, 10:00 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 48 counties
Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Yancey County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN
The radar
The Knoxville radar (KMRX), 78 km from the middle of the area, began a volume at 21:53 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 6:00 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Meigs | 45 min |
| Jul 10, 6:03 PM EDT | Severe Thunderstorm Warning | MRX | Marion | 42 min |
| Jul 10, 6:11 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock | 64 min |
| Jul 10, 6:17 PM EDT | Severe Thunderstorm Warning | MRX | Knox, Loudon, Union | 58 min |
| Jul 10, 6:31 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn | 44 min |
| Jul 10, 6:43 PM EDT | Severe Thunderstorm Warning | MRX | Blount | 62 min |
| Jul 10, 6:45 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton | 30 min |
| Jul 10, 6:52 PM EDT | Severe Thunderstorm Warning | MRX | Monroe | 38 min |
| Jul 10, 6:56 PM EDT | Severe Thunderstorm Warning | MRX | Grainger | 64 min |
| Jul 10, 7:13 PM EDT | Severe Thunderstorm Warning | GSP | Graham, Swain | 47 min |
| Jul 10, 7:14 PM EDT | Severe Thunderstorm Warning | MRX | Hawkins | 61 min |
| Jul 10, 7:20 PM EDT | Severe Thunderstorm Warning | MRX | Polk | 55 min |
| Jul 10, 7:22 PM EDT | Severe Thunderstorm Warning | MRX | Hamblen, Jefferson, Sevier | 53 min |
| Jul 10, 8:03 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 57 min |
| Jul 10, 8:04 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 56 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
Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 240 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.
- Mixed-layer CAPE
- 1671 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 571 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 9:23 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Cumberland, Currituck and 15 more | 97 min |
| Jul 10, 10:20 AM EDT | Mesoscale Discussion | SPC | Buncombe, Cherokee, Clay, Graham, Haywood, Henderson and 7 more | 85 min |
| Jul 10, 11:20 AM EDT | Severe Thunderstorm Watch | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 23 more | 7 hr |
| Jul 10, 2:33 PM EDT | Mesoscale Discussion | SPC | Alexander, Ashe, Avery, Buncombe, Burke, Caldwell and 21 more | 117 min |
| Jul 10, 5:38 PM EDT | Mesoscale Discussion | SPC | Ashe, Avery, Buncombe, Burke, Caldwell, Cherokee and 15 more | 37 min |
| Jul 10, 7:53 PM EDT | Mesoscale Discussion | SPC | Alleghany, Ashe, Avery, Buncombe, Cherokee, Clay and 12 more | 97 min |
| Jul 10, 11:23 AM EDT | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 33 more | 97 min |
| Jul 10, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | Bedford, Bledsoe, Cannon, Cheatham, Clay, Coffee and 37 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Tennessee, 2003Severe Thunderstorm Watches in North Carolina, 2003Every 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.