Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 145
The Storm Prediction Center issued this mesoscale discussion at Feb 7, 2017, 7:28 AM CST for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 7, 2017, 7:28 AM CST (13:28 UTC)
- Expired
- Feb 7, 2017, 9:30 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 57 counties
Crittenden County, AR, Lee County, AR, St. Francis County, AR, Allen County, KY, Logan County, KY, Simpson County, KY, Todd County, KY, Warren County, KY, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Gibson 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, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
The radar
The Ft Campbell radar (KHPX), 133 km from the middle of the area, began a volume at 13:27 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 1.5 hours before the alert went out and 136 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
- 806 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 367 m²/s²
- 0-3 km storm-relative helicity
- 336 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 |
|---|---|---|---|---|
| Feb 6, 10:31 PM CST | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Crittenden and 39 more | 2 hr |
| Feb 6, 10:59 PM CST | Severe Thunderstorm Watch | SPC | Baxter, Boone, Clay, Cleburne, Conway, Craighead and 36 more | 9 hr |
| Feb 7, 1:52 AM CST | Mesoscale Discussion | SPC | Baxter, Clay, Cleburne, Conway, Craighead, Crittenden and 27 more | 113 min |
| Feb 6, 11:20 PM CST | Mesoscale Discussion | SPC | Breckinridge, Bullitt, Carroll, Franklin, Hancock, Henry and 7 more | 115 min |
| Feb 7, 4:57 PM CST | Mesoscale Discussion | SPC | Ballard, Breckinridge, Butler, Caldwell, Calloway, Carlisle and 23 more | 2 hr |
| Feb 7, 5:59 AM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Clarke, Copiah, Covington and 28 more | 2 hr |
| Feb 7, 7:54 AM CST | Tornado Watch | SPC | Adams, Amite, Claiborne, Clarke, Copiah, Covington and 34 more | 11 hr |
| Feb 7, 10:18 AM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Copiah, Covington, Forrest and 26 more | 117 min |
| Feb 7, 12:22 PM CST | Mesoscale Discussion | SPC | Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 12 more | 2 hr |
| Feb 7, 12:56 PM CST | Mesoscale Discussion | SPC | Clarke, Covington, Forrest, George, Greene, Hancock and 18 more | 64 min |
| Feb 7, 5:39 PM CST | Mesoscale Discussion | SPC | Wayne | 96 min |
Nearby
Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Mississippi, 2017Mesoscale Discussions in Kentucky, 2017Every mesoscale discussion in 2017
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.