Alert archive / Tennessee / Mesoscale Discussions in 2023
Mesoscale Discussion 486
The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2023, 12:51 PM CDT for 4 states. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Apr 5, 2023, 12:51 PM CDT (17:51 UTC)
- Expired
- Apr 5, 2023, 2:15 PM CDT
- In force
- 84 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 80%
All 64 counties
Colbert County, AL, Lauderdale County, AL, Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Casey 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, Marion County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Washington County, KY, Alcorn County, MS, Benton County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Bedford County, TN, Benton County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 39 km from the middle of the area, began a volume at 17:54 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, 5.9 hours before the alert went out and 33 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
- 57 J/kg
- Mixed-layer CIN
- -339 J/kg
- Mixed-layer LCL
- 1182 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 273 m²/s²
- 0-3 km storm-relative helicity
- 296 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | Colbert, Franklin, Lauderdale, Limestone | 6 hr |
| Apr 5, 3:48 PM CDT | Mesoscale Discussion | SPC | Blount, Cullman, Fayette, Greene, Jefferson, Lamar and 9 more | 87 min |
| Apr 5, 8:44 AM CDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 7 hr |
| Apr 5, 9:09 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Gallatin, Henry, Jefferson, Meade and 2 more | 66 min |
| Apr 5, 9:25 AM CDT | Tornado Watch | SPC | Boone, Breckinridge, Bullitt, Campbell, Carroll, Gallatin and 12 more | 7 hr |
| Apr 5, 11:51 AM CDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more | 84 min |
| Apr 5, 12:36 PM CDT | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Carroll, Franklin, Gallatin and 13 more | 84 min |
| Apr 5, 1:02 PM CDT | Severe Thunderstorm Watch | SPC | Bracken, Grant, Lewis, Mason, Owen, Pendleton and 1 more | 8 hr |
| Apr 5, 3:05 PM CDT | Mesoscale Discussion | SPC | Adair, Anderson, Barren, Breckinridge, Bullitt, Butler and 29 more | 85 min |
| Apr 5, 5:12 PM CDT | Mesoscale Discussion | SPC | Bath, Bell, Breathitt, Carter, Clay, Elliott and 22 more | 2 hr |
| Apr 5, 2:17 PM CDT | Mesoscale Discussion | SPC | Attala, Carroll, Choctaw, Claiborne, Clay, Copiah and 20 more | 88 min |
| Apr 5, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Attala, Carroll, Choctaw, Claiborne, Clay and 21 more | 4 hr |
Nearby
Mesoscale Discussions in Tennessee, 2023Mesoscale Discussions in Kentucky, 2023Mesoscale Discussions in Mississippi, 2023Every mesoscale discussion in 2023
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.