Alert archive / Tennessee / Mesoscale Discussions in 2014
Mesoscale Discussion 130
The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 8:01 PM CST for 11 counties in Alabama; Itawamba County, Tishomingo County, Mississippi; 39 counties in Tennessee. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Feb 20, 2014, 8:01 PM CST (02:01 UTC)
- Expired
- Feb 20, 2014, 9:30 PM CST
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 52 counties
Colbert County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Itawamba County, MS, Tishomingo County, MS, Bedford County, TN, Bledsoe 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, 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, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea 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 Northeast Alabama radar (KHTX), 59 km from the middle of the area, began a volume at 02:03 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 00:00Z, 2.0 hours before the alert went out and 116 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
- 231 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 346 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 1.3
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 |
|---|---|---|---|---|
| Feb 20, 6:05 PM CST | Tornado Watch | SPC | Bibb, Choctaw, Clarke, Dallas, Greene, Hale and 7 more | 7 hr |
| Feb 20, 6:49 PM CST | Tornado Watch | SPC | Autauga, Blount, Calhoun, Cherokee, Chilton, Clay and 25 more | 6 hr |
| Feb 20, 9:56 PM CST | Mesoscale Discussion | SPC | Bibb, Choctaw, Clarke, Greene, Hale, Marengo and 6 more | 2 hr |
| Feb 20, 11:43 PM CST | Mesoscale Discussion | SPC | Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 42 more | 62 min |
| Feb 21, 12:58 AM CST | Severe Thunderstorm Watch | SPC | Autauga, Baldwin, Barbour, Bibb, Blount, Bullock and 40 more | 7 hr |
| Feb 21, 3:33 AM CST | Mesoscale Discussion | SPC | Barbour, Coffee, Dale, Geneva, Henry, Houston and 2 more | 87 min |
| Feb 20, 6:55 PM CST | Mesoscale Discussion | SPC | Bolivar, Carroll, Humphreys, Issaquena, Leflore, Sharkey and 2 more | 95 min |
| Feb 20, 7:22 PM CST | Tornado Watch | SPC | Amite, Hancock, Harrison, Jackson, Pearl River, Pike and 2 more | 8 hr |
| Feb 20, 9:29 PM CST | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 21 more | 61 min |
| Feb 20, 9:47 PM CST | Tornado Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 6 hr |
| Feb 21, 2:11 AM CST | Mesoscale Discussion | SPC | Carter, Johnson, Unicoi | 94 min |
Nearby
Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Mississippi, 2014Every mesoscale discussion in 2014
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.