Alert archive / Mississippi / Mesoscale Discussions in 2016

Mesoscale Discussion 311

March 31, 201625 counties in Alabama; 61 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2016, 4:47 PM CDT for 25 counties in Alabama; 61 counties in Mississippi. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Mar 31, 2016, 4:47 PM CDT (21:47 UTC)
Expired
Mar 31, 2016, 5:45 PM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 86 counties

Bibb County, AL, Blount County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Colbert County, AL, Cullman County, AL, Dallas County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lawrence County, AL, Marengo County, AL, Marion County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Wilcox County, AL, Winston County, AL, Alcorn County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Itawamba County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Wayne County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Columbus AFB radar (KGWX), 103 km from the middle of the area, began a volume at 21:50 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

Jackson, MS (KJAN), launched 12:00Z, 9.8 hours before the alert went out and 136 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, Jackson, MS at 12:00Z on 2016-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 481 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, Jackson, MS at 12:00Z on 2016-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 501 square meters per square second.1939587897Sfc1 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
481 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
647 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
501 m²/s²
0-3 km storm-relative helicity
572 m²/s²
Significant tornado parameter
1.4
Supercell composite
9.2

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 31, 7:47 AM CDTMesoscale DiscussionSPCWashington58 min
Mar 31, 8:37 AM CDTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more53 min
Mar 31, 8:43 AM CDTTornado WatchSPCBaldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more5 hr
Mar 31, 11:29 AM CDTMesoscale DiscussionSPCBaldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 5 more2 hr
Mar 31, 1:32 PM CDTMesoscale DiscussionSPCBaldwin, Covington, Escambia, Geneva58 min
Mar 31, 5:58 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Chilton, Choctaw, Clarke and 33 more7 hr
Mar 31, 6:52 PM CDTMesoscale DiscussionSPCBibb, Blount, Choctaw, Colbert, Cullman, Dallas and 22 more53 min
Mar 30, 8:39 PM CDTMesoscale DiscussionSPCBolivar, Issaquena, Sharkey, Washington96 min
Mar 30, 10:00 PM CDTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 18 more6 hr
Mar 30, 11:30 PM CDTMesoscale DiscussionSPCAdams, Bolivar, Claiborne, Humphreys, Issaquena, Jefferson and 4 more60 min
Mar 31, 3:04 AM CDTMesoscale DiscussionSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 19 more86 min
Mar 31, 3:20 AM CDTTornado WatchSPCAmite, Covington, Forrest, Jasper, Jefferson Davis, Jones and 10 more6 hr
Mar 31, 10:26 AM CDTMesoscale DiscussionSPCCoahoma, DeSoto, Tate, Tunica3 hr
Mar 31, 1:30 PM CDTMesoscale DiscussionSPCAdams, Attala, Bolivar, Calhoun, Carroll, Chickasaw and 30 more2 hr
Mar 31, 2:35 PM CDTTornado WatchSPCAdams, Alcorn, Attala, Benton, Bolivar, Calhoun and 60 more7 hr
Mar 31, 3:30 PM CDTMesoscale DiscussionSPCAmite, Covington, Forrest, Franklin, George, Greene and 13 more2 hr

Nearby

Mesoscale Discussions in Mississippi, 2016Mesoscale Discussions in Alabama, 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.