Alert archive / Tennessee / Mesoscale Discussions in 2008
Mesoscale Discussion 1855
The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2008, 11:55 AM CDT for 6 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2008, 11:55 AM CDT (16:55 UTC)
- Expired
- Jul 22, 2008, 2:30 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 119 counties
Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Clay County, AR, Cleburne County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Green County, KY, Hart County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Fentress County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Warren County, TN, Wayne County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN
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, 4.9 hours before the alert went out and 129 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
- 2116 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 |
|---|---|---|---|---|
| Jul 22, 12:34 PM CDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 29 more | 6 hr |
| Jul 22, 3:02 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 34 more | 118 min |
| Jul 22, 2:25 PM CDT | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Clay, Cleburne and 20 more | 2 hr |
| Jul 21, 10:38 PM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Boone, Bourbon, Bracken, Breckinridge and 37 more | 97 min |
| Jul 21, 11:06 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bath, Boone, Bourbon, Bracken, Bullitt and 30 more | 6 hr |
| Jul 22, 1:21 AM CDT | Mesoscale Discussion | SPC | Anderson, Bath, Boone, Bourbon, Bracken, Bullitt and 30 more | 54 min |
| Jul 22, 2:27 AM CDT | Severe Thunderstorm Watch | SPC | Boyd, Carter, Greenup, Lawrence | 4 hr |
| Jul 22, 4:47 AM CDT | Mesoscale Discussion | SPC | Ballard, Butler, Caldwell, Calloway, Carlisle, Christian and 15 more | 88 min |
| Jul 22, 2:02 PM CDT | Mesoscale Discussion | SPC | Breathitt, Clay, Elliott, Estill, Floyd, Harlan and 20 more | 88 min |
| Jul 22, 2:20 PM CDT | Severe Thunderstorm Watch | SPC | Bell, Breathitt, Clay, Estill, Floyd, Harlan and 18 more | 8 hr |
| Jul 21, 7:16 PM CDT | Mesoscale Discussion | SPC | Adair, Clark, Grundy, Harrison, Knox, Lewis and 8 more | 89 min |
| Jul 21, 8:00 PM CDT | Mesoscale Discussion | SPC | Audrain, Boone, Buchanan, Caldwell, Callaway, Carroll and 29 more | 90 min |
| Jul 21, 9:14 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 10 more | 6 hr |
| Jul 22, 3:18 AM CDT | Mesoscale Discussion | SPC | Adair, Andrew, Atchison, Audrain, Buchanan, Caldwell and 23 more | 87 min |
| Jul 22, 9:34 AM CDT | Mesoscale Discussion | SPC | Boone, Camden, Cole, Cooper, Crawford, Dent and 12 more | 56 min |
Nearby
Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Arkansas, 2008Every mesoscale discussion in 2008
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.