Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 283
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2017, 10:42 PM CST for 4 states. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2017, 10:42 PM CST (04:42 UTC)
- Expired
- Mar 9, 2017, 11:45 PM CST
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 71 counties
Blount County, AL, Cherokee County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah 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, Chattooga County, GA, Dade County, GA, Walker County, GA, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Chester County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Hickman County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Moore County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Shelby County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
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, 4.7 hours before the alert went out and 100 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
- 2824 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 169 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 |
|---|---|---|---|---|
| Mar 9, 6:39 PM CST | Mesoscale Discussion | SPC | Fayette, Greene, Lamar, Marion, Pickens, Sumter | 96 min |
| Mar 9, 11:18 PM CST | Severe Thunderstorm Watch | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 10 more | 4 hr |
| Mar 10, 12:50 AM CST | Mesoscale Discussion | SPC | Blount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 12 more | 85 min |
| Mar 10, 3:09 AM CST | Mesoscale Discussion | SPC | Chambers, Clay, Cleburne, Coosa, Randolph, Shelby and 3 more | 96 min |
| Mar 9, 6:42 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 5 hr |
| Mar 9, 7:58 PM CST | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, Dickson and 23 more | 92 min |
| Mar 9, 8:38 PM CST | Severe Thunderstorm Watch | SPC | Bedford, Cannon, Cheatham, Coffee, Davidson, DeKalb and 24 more | 4 hr |
| Mar 9, 9:30 PM CST | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Dyer, Gibson and 10 more | 90 min |
Nearby
Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Alabama, 2017Mesoscale Discussions in Mississippi, 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.