Alert archive / Tennessee / Mesoscale Discussions in 2014

Mesoscale Discussion 1380

July 14, 20146 states

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2014, 5:53 PM CDT for 6 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 14, 2014, 5:53 PM CDT (22:53 UTC)
Expired
Jul 14, 2014, 7:30 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 92 counties

Colbert County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Winston County, AL, Arkansas County, AR, Crittenden County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, St. Francis County, AR, Catoosa County, GA, Dade County, GA, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Anderson County, TN, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Carroll County, TN, Chester County, TN, Coffee County, TN, Crockett County, TN, Cumberland County, TN, Decatur County, TN, DeKalb County, TN, Dyer County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Perry County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Sequatchie County, TN, Shelby County, TN, Tipton County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN

The radar

The Ft Campbell radar (KHPX), 146 km from the middle of the area, began a volume at 22:53 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, 10.9 hours before the alert went out and 143 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, 12:10 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 4 more2 hr
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 13, 10:04 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Dent, Howell and 16 more86 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

Nearby

Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Mississippi, 2014Mesoscale Discussions in Alabama, 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.