Alert archive / Tennessee / Mesoscale Discussions in 2007
Mesoscale Discussion 431
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2007, 5:23 PM CDT for 5 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2007, 5:23 PM CDT (22:23 UTC)
- Expired
- Apr 3, 2007, 7:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 109 counties
Blount County, AL, Calhoun County, AL, Cherokee County, AL, Cleburne County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Jefferson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Walker County, AL, Winston County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Allen County, KY, Barren County, KY, Breckinridge County, KY, Butler County, KY, Cumberland County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Larue County, KY, Logan County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Simpson County, KY, Warren County, KY, Cherokee County, NC, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hickman County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Polk County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Northeast Alabama radar (KHTX), 86 km from the middle of the area, began a volume at 22:23 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, 10.4 hours before the alert went out and 86 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
- 13 J/kg
- Mixed-layer CIN
- -79 J/kg
- Mixed-layer LCL
- 1216 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Apr 3, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | Blount, Calhoun, Cherokee, Cleburne, Colbert, Cullman and 14 more | 6 hr |
| Apr 3, 3:22 PM CDT | Mesoscale Discussion | SPC | Baldwin, Barrow, Bibb, Bulloch, Burke, Butts and 45 more | 113 min |
| Apr 3, 11:04 AM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 13 more | 26 min |
| Apr 3, 11:51 AM CDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 8 hr |
| Apr 3, 1:10 PM CDT | Mesoscale Discussion | SPC | Boone, Campbell, Gallatin, Kenton | 65 min |
| Apr 3, 1:33 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Breckinridge, Campbell, Carroll, Gallatin, Grant and 8 more | 7 hr |
| Apr 3, 2:25 PM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 14 more | 65 min |
| Apr 3, 3:23 PM CDT | Mesoscale Discussion | SPC | Adair, Anderson, Bath, Boone, Bourbon, Boyle and 46 more | 67 min |
| Apr 3, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Anderson, Bath, Bell, Bourbon, Boyd and 60 more | 5 hr |
| Apr 3, 6:15 PM CDT | Mesoscale Discussion | SPC | Allen, Barren, Butler, Caldwell, Calloway, Christian and 16 more | 60 min |
| Apr 3, 3:12 PM CDT | Tornado Watch | SPC | Carroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more | 7 hr |
Nearby
Mesoscale Discussions in Tennessee, 2007Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in Alabama, 2007Every mesoscale discussion in 2007
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.