Alert archive / Tennessee / Mesoscale Discussions in 2014

Mesoscale Discussion 1368

July 14, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2014, 12:10 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 14, 2014, 12:10 PM CDT (17:10 UTC)
Expired
Jul 14, 2014, 2:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 147 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Woodruff County, AR, Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breathitt County, KY, Butler County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Estill County, KY, Floyd County, KY, Fulton County, KY, Garrard County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Harlan County, KY, Hart County, KY, Hickman County, KY, Jackson County, KY, Knott County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Logan County, KY, Lyon County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Marshall County, KY, McCreary County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Owsley County, KY, Perry County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Dunklin County, MO, New Madrid County, MO, Pemiscot County, MO, Anderson County, TN, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Claiborne County, TN, Clay County, TN, Cocke County, TN, Coffee County, TN, Crockett County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Fentress County, TN, Gibson County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hardeman County, TN, Hawkins County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Jefferson County, TN, Knox County, TN, Lake County, TN, Lauderdale County, TN, Lewis County, TN, Loudon County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Moore County, TN, Morgan County, TN, Obion County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Robertson County, TN, Rutherford County, TN, Scott County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Union County, TN, Van Buren County, TN, Warren County, TN, Washington County, TN, Wayne County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN, City of Norton, VA, Lee County, VA, Scott County, VA, Wise County, VA

The radar

The Nashville radar (KOHX), 22 km from the middle of the area, began a volume at 17:11 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 12:00Z, 5.2 hours before the alert went out and 36 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 2014-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1315 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 2014-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.193958Sfc1 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
1315 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 1:22 PM CDTSevere Thunderstorm WatchSPCCleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 27 more7 hr
Jul 14, 3:57 PM CDTMesoscale DiscussionSPCCleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 16 more93 min
Jul 14, 5:53 PM CDTMesoscale DiscussionSPCArkansas, Crittenden, Jefferson, Lee, Lonoke, Mississippi and 4 more97 min
Jul 13, 10:04 PM CDTMesoscale DiscussionSPCBallard, Caldwell, Carlisle, Christian, Crittenden, Daviess and 13 more86 min
Jul 14, 4:53 PM CDTMesoscale DiscussionSPCBoone, Bracken, Bullitt, Campbell, Carroll, Franklin and 17 more67 min
Jul 14, 10:56 AM CDTMesoscale DiscussionSPCAudrain, Bates, Benton, Boone, Callaway, Cass and 22 more94 min
Jul 14, 11:42 AM CDTSevere Thunderstorm WatchSPCAudrain, Benton, Boone, Callaway, Camden, Cole and 25 more6 hr
Jul 14, 1:10 PM CDTMesoscale DiscussionSPCBarton, Bates, Cedar, Christian, Dade, Dallas and 10 more2 hr
Jul 14, 2:21 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Crawford, Dent, Franklin, Gasconade and 13 more54 min
Jul 14, 11:50 AM CDTMesoscale DiscussionSPCCarter, Johnson85 min
Jul 13, 7:46 PM CDTMesoscale DiscussionSPCArlington, Fairfax, Loudoun, Prince William, City of Alexandria, City of Fairfax and 3 more89 min
Jul 14, 12:06 PM CDTMesoscale DiscussionSPCAlbemarle, Arlington, Augusta, Caroline, Clarke, Culpeper and 30 more84 min
Jul 14, 12:24 PM CDTSevere Thunderstorm WatchSPCAlbemarle, Arlington, Augusta, Clarke, Culpeper, Fairfax and 28 more8 hr
Jul 14, 3:39 PM CDTMesoscale DiscussionSPCAlbemarle, Arlington, Augusta, Clarke, Culpeper, Fairfax and 28 more96 min
Jul 14, 5:59 PM CDTMesoscale DiscussionSPCCaroline, Essex, Hanover, King and Queen, King William, Lancaster and 5 more61 min

Nearby

Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Arkansas, 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.