Alert archive / Kentucky / Mesoscale Discussions in 2003
Mesoscale Discussion 814
The Storm Prediction Center issued this mesoscale discussion at May 7, 2003, 5:26 AM EDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2003, 5:26 AM EDT (09:26 UTC)
- Expired
- May 7, 2003, 7:30 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 67 counties
Bell County, KY, Breathitt County, KY, Clark County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Madison County, KY, Magoffin County, KY, Martin County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Cherokee County, NC, Graham County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Cumberland County, TN, Fentress County, TN, Grainger County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Pickett County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Union County, TN, Van Buren County, TN, White County, TN, Lee County, VA
The radar
The Knoxville radar (KMRX), 96 km from the middle of the area, began a volume at 09:25 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 00:00Z, 9.4 hours before the alert went out and 192 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
- 1519 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 3.1
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 |
|---|---|---|---|---|
| May 6, 10:35 PM EDT | Mesoscale Discussion | SPC | Ballard, Crittenden, Henderson, Livingston, McCracken, Union and 1 more | 115 min |
| May 7, 12:32 AM EDT | Mesoscale Discussion | SPC | Breckinridge, Butler, Caldwell, Calloway, Christian, Daviess and 18 more | 88 min |
| May 7, 12:50 AM EDT | Tornado Watch | SPC | Adair, Allen, Anderson, Ballard, Barren, Bourbon and 58 more | 6 hr |
| May 7, 2:16 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Breckinridge, Bullitt, Butler and 27 more | 3 hr |
| May 7, 2:41 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 49 more | 3 hr |
| May 7, 3:40 AM EDT | Severe Thunderstorm Watch | SPC | Bell, Breathitt, Clark, Clay, Elliott, Estill and 27 more | 5 hr |
| May 7, 5:55 AM EDT | Tornado Watch | SPC | Fulton | 6 hr |
| May 7, 8:06 AM EDT | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 40 more | 114 min |
| May 7, 8:35 AM EDT | Tornado Watch | SPC | Bedford, Bledsoe, Cannon, Coffee, Cumberland, DeKalb and 14 more | 5 hr |
| May 7, 12:49 PM EDT | Mesoscale Discussion | SPC | Clarke, Frederick, Loudoun, Shenandoah, Warren, City of Winchester | 116 min |
| May 7, 1:20 PM EDT | Severe Thunderstorm Watch | SPC | Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more | 6 hr |
| May 7, 3:21 PM EDT | Mesoscale Discussion | SPC | Arlington, Caroline, Clarke, Culpeper, Fairfax, Fauquier and 22 more | 114 min |
| May 7, 6:07 PM EDT | Mesoscale Discussion | SPC | Arlington, Caroline, Culpeper, Fairfax, Fauquier, Greene and 13 more | 53 min |
Nearby
Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in North Carolina, 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.