Alert archive / Tennessee / Mesoscale Discussions in 2017
Mesoscale Discussion 281
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2017, 7:58 PM CST for 13 counties in Kentucky; 29 counties in Tennessee. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2017, 7:58 PM CST (01:58 UTC)
- Expired
- Mar 9, 2017, 9:30 PM CST
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 42 counties
Caldwell County, KY, Calloway County, KY, Christian County, KY, Crittenden County, KY, Graves County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN
The radar
The Ft Campbell radar (KHPX), 47 km from the middle of the area, began a volume at 01:57 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 95 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, 6:42 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 5 hr |
| 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 |
| Mar 9, 10:42 PM CST | Mesoscale Discussion | SPC | Bedford, Cannon, Cheatham, Chester, Coffee, Davidson and 32 more | 63 min |
| Mar 9, 11:18 PM CST | Severe Thunderstorm Watch | SPC | Franklin, Lincoln, Marion, Moore | 4 hr |
| Mar 10, 12:50 AM CST | Mesoscale Discussion | SPC | Bledsoe, Bradley, Hamilton, McMinn, Marion, Meigs and 4 more | 85 min |
Nearby
Mesoscale Discussions in Tennessee, 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.