Alert archive / Tennessee / Mesoscale Discussions in 2016

Mesoscale Discussion 1174

July 6, 201613 counties in Kentucky; Cherokee County, Graham County, Swain County, North Carolina; 57 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2016, 5:48 PM EDT for 13 counties in Kentucky; Cherokee County, Graham County, Swain County, North Carolina; 57 counties in Tennessee. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Jul 6, 2016, 5:48 PM EDT (21:48 UTC)
Expired
Jul 6, 2016, 6:45 PM EDT
In force
57 min
Issued by
the Storm Prediction Center
All 73 counties

Bell County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, McCreary County, KY, Monroe County, KY, Pulaski County, KY, Russell County, KY, Wayne County, KY, Whitley County, KY, Cherokee County, NC, Graham County, NC, Swain County, NC, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Cannon County, TN, Cheatham County, TN, Claiborne County, TN, Clay County, TN, Cocke County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grainger County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hickman County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Lawrence County, TN, Lewis County, TN, Loudon County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Sevier 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

The radar

The Nashville radar (KOHX), 137 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 140 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2016-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1605 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2016-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1605 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 11:32 AM EDTMesoscale DiscussionSPCBallard, Carlisle, Fulton, Hickman58 min
Jul 6, 11:48 AM EDTSevere Thunderstorm WatchSPCBallard, Calloway, Carlisle, Fulton, Graves, Hickman and 3 more5 hr
Jul 6, 1:53 PM EDTMesoscale DiscussionSPCBallard, Calloway, Carlisle, Fulton, Graves, Hickman and 3 more67 min
Jul 6, 2:21 PM EDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Carter, Clark and 19 more84 min
Jul 6, 2:24 PM EDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 43 more6 hr
Jul 5, 8:45 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Carteret, Craven, Duplin, Edgecombe and 11 more2 hr
Jul 6, 3:01 PM EDTMesoscale DiscussionSPCScotland59 min
Jul 6, 3:44 PM EDTMesoscale DiscussionSPCBrunswick, Columbus, New Hanover, Robeson61 min
Jul 6, 4:03 PM EDTSevere Thunderstorm WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson4 hr
Jul 6, 7:51 PM EDTMesoscale DiscussionSPCAlexander, Alleghany, Ashe, Avery, Buncombe, Burke and 15 more54 min

Nearby

Mesoscale Discussions in Tennessee, 2016Mesoscale Discussions in Kentucky, 2016Mesoscale Discussions in North Carolina, 2016Every mesoscale discussion in 2016

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.