Alert archive / Tennessee / Mesoscale Discussions in 2011

Mesoscale Discussion 1255

June 16, 20114 counties in Kentucky; 5 counties in Mississippi; 20 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 8:22 PM CDT for 4 counties in Kentucky; 5 counties in Mississippi; 20 counties in Tennessee. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2011, 8:22 PM CDT (01:22 UTC)
Expired: Jun 16, 2011, 9:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 29 counties

Calloway County, KY, Christian County, KY, Marshall County, KY, Trigg County, KY, Alcorn County, MS, Benton County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Decatur County, TN, Dickson County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Stewart County, TN, Wayne County, TN, Weakley County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.4 hours before the alert went out and 147 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 89 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 2222 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

Issued	Product	Office	Counties	Lasted
Jun 17, 1:34 PM CDT	Mesoscale Discussion	SPC	Adair, Anderson, Bourbon, Boyle, Breckinridge, Bullitt and 35 more	26 min
Jun 17, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	Breckinridge, Butler, Caldwell, Crittenden, Daviess, Grayson and 10 more	4 hr
Jun 17, 3:39 PM CDT	Mesoscale Discussion	SPC	Breckinridge, Butler, Crittenden, Daviess, Grayson, Hancock and 7 more	66 min
Jun 17, 9:49 AM CDT	Mesoscale Discussion	SPC	Kemper, Lauderdale, Noxubee, Winston	86 min
Jun 17, 11:42 AM CDT	Severe Thunderstorm Watch	SPC	Clarke, Covington, Forrest, Greene, Jasper, Jones and 8 more	6 hr
Jun 17, 2:45 PM CDT	Mesoscale Discussion	SPC	Clarke, Covington, Forrest, Jasper, Jones, Newton and 2 more	60 min

Nearby

Mesoscale Discussions in Tennessee, 2011 Mesoscale Discussions in Mississippi, 2011 Mesoscale Discussions in Kentucky, 2011 Every mesoscale discussion in 2011

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.