Alert archive / Mississippi / Mesoscale Discussions in 2015

Mesoscale Discussion 202

April 3, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2015, 3:57 PM CDT for 5 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2015, 3:57 PM CDT (20:57 UTC)
Expired
Apr 3, 2015, 5:30 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 97 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Lee County, AR, Lincoln County, AR, Phillips County, AR, Union County, AR, East Carroll Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Union Parish, LA, West Carroll Parish, LA, Alcorn County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Kemper County, MS, Lafayette 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, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Chester County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Lawrence County, TN, Lincoln County, TN, McNairy County, TN, Shelby County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 64 km from the middle of the area, began a volume at 20:56 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, 9.0 hours before the alert went out and 124 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 2015-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 2015-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 516 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
12 J/kg
Mixed-layer CIN
-578 J/kg
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
516 m²/s²
0-3 km storm-relative helicity
503 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.

IssuedProductOfficeCountiesLasted
Apr 3, 6:48 PM CDTSevere Thunderstorm WatchSPCBlount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 13 more4 hr
Apr 2, 7:02 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Fulton, Marion8 hr
Apr 2, 10:12 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Marion93 min
Apr 3, 1:16 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Craighead and 13 more59 min
Apr 3, 1:35 AM CDTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Craighead, Fulton and 14 more6 hr
Apr 3, 1:52 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll4 hr
Apr 3, 5:43 AM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Craighead, Fulton, Greene and 13 more2 hr
Apr 3, 12:14 PM CDTTornado WatchSPCMississippi8 hr
Apr 3, 5:54 PM CDTMesoscale DiscussionSPCUnion2 hr
Apr 3, 5:55 PM CDTSevere Thunderstorm WatchSPCAshley, Chicot4 hr
Apr 3, 11:56 AM CDTMesoscale DiscussionSPCBenton, Cannon, Carroll, Cheatham, Clay, Crockett and 24 more94 min
Apr 3, 2:23 PM CDTMesoscale DiscussionSPCCampbell, Cheatham, Claiborne, Clay, Davidson, DeKalb and 22 more97 min
Apr 3, 3:10 PM CDTTornado WatchSPCAnderson, Bedford, Bledsoe, Blount, Bradley, Campbell and 37 more6 hr
Apr 3, 5:54 PM CDTMesoscale DiscussionSPCCannon, Cumberland, DeKalb, Fentress, Jackson, Morgan and 9 more66 min

Nearby

Mesoscale Discussions in Mississippi, 2015Mesoscale Discussions in Alabama, 2015Mesoscale Discussions in Arkansas, 2015Every mesoscale discussion in 2015

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.