Alert archive / Tennessee / Mesoscale Discussions in 2018
Mesoscale Discussion 131
The Storm Prediction Center issued this mesoscale discussion at Mar 17, 2018, 7:06 PM EDT for 5 states. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Mar 17, 2018, 7:06 PM EDT (23:06 UTC)
- Expired
- Mar 17, 2018, 9:00 PM EDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 54 counties
Bell County, KY, Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, McCreary County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Whitley County, KY, Madison County, NC, Mitchell County, NC, Yancey County, NC, Anderson County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Morgan County, TN, Roane County, TN, Scott County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, Buchanan County, VA, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, McDowell County, WV
The radar
The Knoxville radar (KMRX), 43 km from the middle of the area, began a volume at 23:07 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, 11.1 hours before the alert went out and 294 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
- 69 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 17, 12:46 AM EDT | Mesoscale Discussion | SPC | Ballard, Butler, Caldwell, Calloway, Carlisle, Christian and 13 more | 59 min |
| Mar 17, 3:25 PM EDT | Mesoscale Discussion | SPC | Adair, Barren, Bell, Boyle, Breathitt, Casey and 41 more | 2 hr |
| Mar 17, 4:33 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Barren, Bell, Boyle, Breathitt, Casey and 45 more | 7 hr |
| Mar 17, 6:06 PM EDT | Mesoscale Discussion | SPC | Cherokee, Clay, Graham | 114 min |
Nearby
Mesoscale Discussions in Tennessee, 2018Mesoscale Discussions in Kentucky, 2018Mesoscale Discussions in Virginia, 2018Every mesoscale discussion in 2018
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.