Alert archive / Tennessee / Mesoscale Discussions in 2014

Mesoscale Discussion 322

April 11, 2014Fulton County, Kentucky; Dunklin County, New Madrid County, Pemiscot County, Missouri; 15 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2014, 4:44 PM CDT for Fulton County, Kentucky; Dunklin County, New Madrid County, Pemiscot County, Missouri; 15 counties in Tennessee. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Apr 11, 2014, 4:44 PM CDT (21:44 UTC)
Expired: Apr 11, 2014, 5:45 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Fulton County, KY, Dunklin County, MO, New Madrid County, MO, Pemiscot County, MO, Benton County, TN, Carroll County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Gibson County, TN, Henderson County, TN, Henry County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Perry County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 113 km from the middle of the area, began a volume at 21:45 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

Little Rock, AR (KBYH), launched 12:00Z, 9.7 hours before the alert went out and 160 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1658 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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
Apr 11, 2:36 PM CDT	Mesoscale Discussion	SPC	Butler, Dunklin, Howell, New Madrid, Oregon, Ozark and 2 more	114 min

Nearby

Mesoscale Discussions in Tennessee, 2014 Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Kentucky, 2014 Every 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.