Alert archive / Tennessee / Mesoscale Discussions in 2016

Mesoscale Discussion 308

March 31, 2016Crittenden County, Cross County, Arkansas; 15 counties in Kentucky; 29 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2016, 2:14 PM CDT for Crittenden County, Cross County, Arkansas; 15 counties in Kentucky; 29 counties in Tennessee. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2016, 2:14 PM CDT (19:14 UTC)
Expired
Mar 31, 2016, 3:45 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
All 46 counties

Crittenden County, AR, Cross County, AR, Butler County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Graves County, KY, Hopkins County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Trigg County, KY, Webster County, KY, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Wayne County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 98 km from the middle of the area, began a volume at 19:14 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

Little Rock, AR (KBYH), launched 12:00Z, 7.2 hours before the alert went out and 187 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, Little Rock, AR at 12:00Z on 2016-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 866 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, Little Rock, AR at 12:00Z on 2016-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.19395878Sfc1 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
866 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
556 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

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
Mar 30, 7:44 PM CDTSevere Thunderstorm WatchSPCBenton4 hr
Mar 30, 8:37 PM CDTMesoscale DiscussionSPCBenton53 min
Mar 30, 8:39 PM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Desha, Drew, Lincoln and 1 more96 min
Mar 30, 10:00 PM CDTTornado WatchSPCAshley, Bradley, Chicot, Desha, Drew, Union6 hr
Mar 30, 11:30 PM CDTMesoscale DiscussionSPCChicot, Desha60 min
Mar 31, 10:26 AM CDTMesoscale DiscussionSPCArkansas, Cleveland, Craighead, Crittenden, Cross, Dallas and 14 more3 hr
Mar 31, 10:58 AM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 9 more5 hr
Mar 31, 1:30 PM CDTMesoscale DiscussionSPCChicot2 hr
Mar 31, 2:05 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 7 more8 hr
Mar 31, 2:35 PM CDTTornado WatchSPCLee, Phillips7 hr
Mar 31, 3:48 PM CDTMesoscale DiscussionSPCLogan, Simpson, Warren87 min
Mar 31, 3:59 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Barren, Casey, Clinton, Cumberland and 9 more5 hr
Mar 31, 5:09 PM CDTMesoscale DiscussionSPCBallard, Caldwell, Carlisle, Crittenden, Daviess, Graves and 10 more96 min
Mar 31, 5:49 PM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Boyle, Breathitt, Casey and 28 more56 min
Mar 31, 5:58 PM CDTTornado WatchSPCBedford, Cannon, Coffee, Franklin, Giles, Grundy and 8 more7 hr
Mar 31, 6:52 PM CDTMesoscale DiscussionSPCFranklin, Giles, Lincoln, Moore53 min

Nearby

Mesoscale Discussions in Tennessee, 2016Mesoscale Discussions in Kentucky, 2016Mesoscale Discussions in Arkansas, 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.