Alert archive / Tennessee / Mesoscale Discussions in 2014
Mesoscale Discussion 132
The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 10:29 PM EST for 5 states. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Feb 20, 2014, 10:29 PM EST (03:29 UTC)
- Expired
- Feb 20, 2014, 11:30 PM EST
- In force
- 61 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 64 counties
Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Gilmer County, GA, Gordon County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Towns County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Bell County, KY, Breathitt County, KY, Clay County, KY, Estill County, KY, Harlan County, KY, Jackson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, McCreary County, KY, Owsley County, KY, Perry County, KY, Rockcastle County, KY, Whitley County, KY, Cherokee County, NC, Clay County, NC, Graham County, NC, Swain 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, 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, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Union County, TN, Lee County, VA
The radar
The Knoxville radar (KMRX), 74 km from the middle of the area, began a volume at 03:32 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, 3.5 hours before the alert went out and 213 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
- 231 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 346 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.4
- 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 |
|---|---|---|---|---|
| Feb 20, 10:47 PM EST | Tornado Watch | SPC | Bartow, Catoosa, Chattooga, Cherokee, Dade, Dawson and 16 more | 6 hr |
| Feb 21, 1:58 AM EST | Severe Thunderstorm Watch | SPC | Baker, Barrow, Bibb, Butts, Calhoun, Carroll and 55 more | 7 hr |
| Feb 21, 4:33 AM EST | Mesoscale Discussion | SPC | Baldwin, Barrow, Bibb, Butts, Calhoun, Chattahoochee and 45 more | 87 min |
| Feb 21, 6:39 AM EST | Severe Thunderstorm Watch | SPC | Appling, Atkinson, Bacon, Baldwin, Ben Hill, Berrien and 64 more | 9 hr |
| Feb 21, 8:17 AM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 33 more | 118 min |
| Feb 21, 10:13 AM EST | Mesoscale Discussion | SPC | Brantley, Camden, Charlton, Glynn, Ware | 92 min |
| Feb 21, 12:43 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baldwin, Ben Hill, Berrien and 61 more | 62 min |
| Feb 20, 9:19 PM EST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Boone, Boyle and 41 more | 86 min |
| Feb 20, 11:38 PM EST | Mesoscale Discussion | SPC | Bath, Boone, Bourbon, Boyd, Bracken, Campbell and 23 more | 67 min |
| Feb 21, 12:02 AM EST | Severe Thunderstorm Watch | SPC | Boyd, Bracken, Carter, Greenup, Lawrence, Lewis and 3 more | 4 hr |
| Feb 21, 3:11 AM EST | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 14 more | 94 min |
| Feb 21, 8:57 AM EST | Mesoscale Discussion | SPC | Alamance, Bladen, Caswell, Chatham, Columbus, Cumberland and 22 more | 63 min |
| Feb 21, 10:02 AM EST | Tornado Watch | SPC | Alamance, Bladen, Brunswick, Chatham, Columbus, Cumberland and 24 more | 6 hr |
| Feb 21, 10:39 AM EST | Tornado Watch | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 3 more | 5 hr |
| Feb 21, 11:05 AM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Carteret, Chowan, Columbus and 27 more | 55 min |
| Feb 21, 12:15 PM EST | Tornado Watch | SPC | Beaufort, Carteret, Craven, Dare, Duplin, Greene and 9 more | 5 hr |
| Feb 21, 1:14 PM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 19 more | 61 min |
| Feb 20, 7:49 PM EST | Tornado Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 26 more | 6 hr |
| Feb 20, 9:01 PM EST | Mesoscale Discussion | SPC | Bedford, Bledsoe, Cannon, Clay, Coffee, Cumberland and 33 more | 89 min |
| Feb 21, 12:16 PM EST | Mesoscale Discussion | SPC | Accomack, Charles City, Essex, Gloucester, Isle of Wight, James City and 24 more | 89 min |
Nearby
Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Georgia, 2014Mesoscale Discussions in Kentucky, 2014Every mesoscale discussion in 2014
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.