Alert archive / Mississippi / Mesoscale Discussions in 2016

Mesoscale Discussion 298

March 30, 2016Chicot County, Desha County, Arkansas; 9 parishes in Louisiana; 10 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2016, 11:30 PM CDT for Chicot County, Desha County, Arkansas; 9 parishes in Louisiana; 10 counties in Mississippi. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2016, 11:30 PM CDT (04:30 UTC)
Expired: Mar 31, 2016, 12:30 AM CDT
In force: 60 min
Issued by: the Storm Prediction Center

All 21 counties

Chicot County, AR, Desha County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Bolivar County, MS, Claiborne County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 130 km from the middle of the area, began a volume at 04:31 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

Jackson, MS (KJAN), launched 00:00Z, 4.5 hours before the alert went out and 120 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: 213 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.1
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.

Issued	Product	Office	Counties	Lasted
Mar 30, 7:44 PM CDT	Severe Thunderstorm Watch	SPC	Benton	4 hr
Mar 30, 8:37 PM CDT	Mesoscale Discussion	SPC	Benton	53 min
Mar 30, 8:39 PM CDT	Mesoscale Discussion	SPC	Ashley, Bradley, Chicot, Desha, Drew, Lincoln and 1 more	96 min
Mar 30, 10:00 PM CDT	Tornado Watch	SPC	Ashley, Bradley, Chicot, Desha, Drew, Union	6 hr
Mar 31, 10:26 AM CDT	Mesoscale Discussion	SPC	Arkansas, Cleveland, Craighead, Crittenden, Cross, Dallas and 14 more	3 hr
Mar 31, 10:58 AM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Jackson and 9 more	5 hr
Mar 31, 1:30 PM CDT	Mesoscale Discussion	SPC	Chicot	2 hr
Mar 31, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 7 more	8 hr
Mar 31, 2:14 PM CDT	Mesoscale Discussion	SPC	Crittenden, Cross	91 min
Mar 31, 2:35 PM CDT	Tornado Watch	SPC	Lee, Phillips	7 hr
Mar 31, 3:04 AM CDT	Mesoscale Discussion	SPC	East Feliciana, Pointe Coupee, Saint Helena, Tangipahoa, Washington, West Feliciana	86 min
Mar 31, 3:20 AM CDT	Tornado Watch	SPC	East Baton Rouge, East Feliciana, Livingston, Pointe Coupee, Saint Helena, Saint Tammany and 4 more	6 hr
Mar 31, 3:30 PM CDT	Mesoscale Discussion	SPC	Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 6 more	2 hr
Mar 31, 5:22 PM CDT	Mesoscale Discussion	SPC	Caldwell, Catahoula, East Carroll, Franklin, Grant, Jackson and 9 more	53 min
Mar 31, 7:47 AM CDT	Mesoscale Discussion	SPC	Covington, Forrest, Greene, Jefferson Davis, Jones, Lamar and 3 more	58 min
Mar 31, 8:43 AM CDT	Tornado Watch	SPC	George, Greene, Perry, Stone	5 hr
Mar 31, 4:47 PM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 55 more	58 min
Mar 31, 5:58 PM CDT	Tornado Watch	SPC	Wayne	7 hr
Mar 31, 6:52 PM CDT	Mesoscale Discussion	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clarke, Clay and 29 more	53 min

Nearby

Mesoscale Discussions in Mississippi, 2016 Mesoscale Discussions in Louisiana, 2016 Mesoscale Discussions in Arkansas, 2016 Every 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.