Alert archive / Tennessee / Mesoscale Discussions in 2003
Mesoscale Discussion 1808
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 12:16 PM CDT for 4 states. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2003, 12:16 PM CDT (17:16 UTC)
- Expired
- Jul 13, 2003, 2:15 PM CDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 86 counties
Allen County, KY, Bell County, KY, Clinton County, KY, Cumberland County, KY, Harlan County, KY, Knox County, KY, McCreary County, KY, Monroe County, KY, Wayne County, KY, Whitley County, KY, Alleghany County, NC, 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, 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, Clay County, TN, Cocke County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jackson County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Macon County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Smith County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, Washington County, TN, White County, TN, City of Bristol, VA, City of Galax, VA, City of Norton, VA, City of Radford, VA, Grayson County, VA, Lee County, VA, Pulaski County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Washington County, VA, Wise County, VA, Wythe County, VA
The radar
The Knoxville radar (KMRX), 64 km from the middle of the area, began a volume at 17:16 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 5.3 hours before the alert went out and 225 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
- 1439 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 11:50 AM CDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Columbus, Cumberland, Duplin and 18 more | 115 min |
| Jul 13, 5:09 PM CDT | Mesoscale Discussion | SPC | Bladen, Craven, Cumberland, Duplin, Jones, Lenoir and 4 more | 66 min |
| Jul 13, 11:30 AM CDT | Mesoscale Discussion | SPC | Fayette, Shelby | 2 hr |
| Jul 13, 11:55 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 35 more | 6 hr |
| Jul 13, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 32 more | 5 hr |
| Jul 13, 3:53 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Cheatham, Chester, Crockett, Davidson and 30 more | 67 min |
| Jul 13, 5:26 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Cumberland, Grundy and 11 more | 94 min |
| Jul 13, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | Bedford, Chester, Fayette, Giles, Hardeman, Hardin and 7 more | 4 hr |
Nearby
Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in North Carolina, 2003Mesoscale Discussions in Virginia, 2003Every mesoscale discussion 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.