Alert archive / Tennessee / Mesoscale Discussions in 2022
Mesoscale Discussion 424
The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2022, 12:59 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 6, 2022, 12:59 PM CDT (17:59 UTC)
- Expired
- Apr 6, 2022, 3:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
All 35 counties
Cullman County, AL, Fayette County, AL, Franklin County, AL, Jackson County, AL, Lamar County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Winston County, AL, Clinton County, KY, Cumberland County, KY, Monroe County, MS, Bedford County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grundy County, TN, Jackson County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Moore County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Van Buren County, TN, Warren County, TN, White County, TN
The radar
The Northeast Alabama radar (KHTX), 47 km from the middle of the area, began a volume at 18:02 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, 6.0 hours before the alert went out and 113 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 310 m²/s²
- 0-3 km storm-relative helicity
- 329 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 6, 11:28 AM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 21 more | 3 hr |
| Apr 6, 11:58 AM CDT | Mesoscale Discussion | SPC | Houston | 2 hr |
| Apr 6, 1:11 PM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 30 more | 10 hr |
| Apr 6, 2:58 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Bullock, Chambers, Chilton, Clay and 24 more | 2 hr |
| Apr 6, 3:43 PM CDT | Mesoscale Discussion | SPC | DeKalb, Jackson, Limestone, Madison, Marshall, Morgan | 62 min |
| Apr 6, 3:59 PM CDT | Tornado Watch | SPC | DeKalb, Jackson, Marshall | 5 hr |
| Apr 6, 5:06 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Bullock, Butler, Calhoun and 32 more | 114 min |
| Apr 6, 6:25 PM CDT | Mesoscale Discussion | SPC | Blount, Bradley, Grainger, Hamblen, Hawkins, Jefferson and 6 more | 2 hr |
Nearby
Mesoscale Discussions in Tennessee, 2022Mesoscale Discussions in Alabama, 2022Mesoscale Discussions in Kentucky, 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.