Alert archive / Tennessee / Mesoscale Discussions in 2022
Mesoscale Discussion 8
The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2022, 12:38 PM CST for 7 counties in Alabama; 23 counties in Kentucky; 44 counties in Tennessee. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Jan 1, 2022, 12:38 PM CST (18:38 UTC)
- Expired
- Jan 1, 2022, 2:15 PM CST
- In force
- 97 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 3
All 74 counties
Colbert County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Morgan County, AL, Adair County, KY, Casey County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Estill County, KY, Garrard County, KY, Jackson County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Lincoln County, KY, Madison County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Owsley County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Wayne County, KY, Whitley County, KY, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb 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, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 73 km from the middle of the area, began a volume at 18:37 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, 6.6 hours before the alert went out and 74 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
- 379 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 189 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.6
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 |
|---|---|---|---|---|
| Jan 1, 12:56 PM CST | Tornado Watch | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 6 hr |
| Jan 1, 1:57 PM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison | 93 min |
| Jan 1, 3:27 PM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more | 93 min |
| Jan 1, 3:52 PM CST | Tornado Watch | SPC | Bibb, Blount, Cullman, DeKalb, Etowah, Fayette and 13 more | 6 hr |
| Jan 1, 5:53 PM CST | Mesoscale Discussion | SPC | DeKalb, Jackson, Lawrence, Limestone, Madison, Marshall and 1 more | 67 min |
| Dec 31, 9:31 PM CST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 67 more | 2 hr |
| Dec 31, 11:57 PM CST | Tornado Watch | SPC | Adair, Allen, Barren, Butler, Calloway, Carlisle and 33 more | 7 hr |
| Jan 1, 2:07 AM CST | Mesoscale Discussion | SPC | Allen, Barren, Butler, Calloway, Christian, Cumberland and 9 more | 113 min |
| Jan 1, 10:29 AM CST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Casey, Edmonson and 10 more | 61 min |
| Jan 1, 10:50 AM CST | Tornado Watch | SPC | Adair, Allen, Barren, Boyle, Casey, Clinton and 14 more | 7 hr |
Nearby
Mesoscale Discussions in Tennessee, 2022Mesoscale Discussions in Kentucky, 2022Mesoscale Discussions in Alabama, 2022Every mesoscale discussion in 2022
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.