Alert archive / Tennessee / Mesoscale Discussions in 2014
Mesoscale Discussion 1664
The Storm Prediction Center issued this mesoscale discussion at Sep 2, 2014, 3:49 PM CDT for 42 counties in Kentucky; 46 counties in Tennessee; 6 counties in Virginia. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Sep 2, 2014, 3:49 PM CDT (20:49 UTC)
- Expired
- Sep 2, 2014, 4:45 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 94 counties
Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breathitt County, KY, Casey County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Estill County, KY, Floyd County, KY, Garrard County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Martin County, KY, McCreary County, KY, Menifee County, KY, Metcalfe County, KY, Monroe County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Taylor County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Anderson County, TN, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Cheatham County, TN, Claiborne County, TN, Clay County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Grainger County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Knox County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Scott County, VA, Wise County, VA
The radar
The Nashville radar (KOHX), 146 km from the middle of the area, began a volume at 20:51 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, 8.8 hours before the alert went out and 155 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
- 1661 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 808 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.3
- 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 |
|---|---|---|---|---|
| Sep 2, 6:05 PM CDT | Mesoscale Discussion | SPC | Anderson, Bedford, Campbell, Cannon, Claiborne, Cumberland and 14 more | 55 min |
| Sep 2, 3:11 PM CDT | Mesoscale Discussion | SPC | Albemarle, Alleghany, Arlington, Augusta, Bath, Botetourt and 37 more | 94 min |
| Sep 2, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Arlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax | 5 hr |
Nearby
Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Virginia, 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.