Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 987

May 14, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 14, 2003, 9:20 PM CDT for 4 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 14, 2003, 9:20 PM CDT (02:20 UTC)
Expired
May 14, 2003, 11:15 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 45 counties

Ashley County, AR, Columbia County, AR, Lafayette County, AR, Miller County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Claiborne County, MS, Copiah County, MS, Covington County, MS, Hinds County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Lincoln County, MS, Madison County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Yazoo County, MS, Cass County, TX, Harrison County, TX, Marion County, TX

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 00:00Z, 2.3 hours before the alert went out and 165 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 00:00Z on 2003-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 595 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 00:00Z on 2003-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
595 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.9

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
May 14, 7:36 PM CDTMesoscale DiscussionSPCHempstead, Howard, Little River, Miller, Pike, Polk and 1 more114 min
May 14, 10:10 PM CDTMesoscale DiscussionSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 2 more2 hr
May 14, 11:35 PM CDTSevere Thunderstorm WatchSPCBienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 19 more5 hr
May 15, 2:27 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Catahoula, Concordia and 10 more2 hr
May 15, 11:48 AM CDTMesoscale DiscussionSPCAttala, Carroll, Chickasaw, Choctaw, Clarke, Clay and 15 more117 min
May 14, 11:20 PM CDTMesoscale DiscussionSPCBell, Bosque, Coryell, Ellis, Falls, Freestone and 5 more115 min
May 14, 11:45 PM CDTSevere Thunderstorm WatchSPCAnderson, Bosque, Collin, Dallas, Delta, Denton and 16 more5 hr
May 15, 2:10 AM CDTMesoscale DiscussionSPCAnderson, Collin, Dallas, Denton, Ellis, Henderson and 13 more2 hr
May 15, 1:31 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Dallam, Deaf Smith and 10 more119 min
May 15, 1:55 PM CDTTornado WatchSPCArmstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 13 more6 hr
May 15, 3:41 PM CDTMesoscale DiscussionSPCArmstrong, Baylor, Briscoe, Carson, Castro, Childress and 30 more94 min
May 15, 4:05 PM CDTTornado WatchSPCBorden, Briscoe, Castro, Childress, Cottle, Crosby and 20 more6 hr
May 15, 5:15 PM CDTMesoscale DiscussionSPCFrio, Kinney, Maverick, Uvalde, Zavala2 hr
May 15, 5:49 PM CDTMesoscale DiscussionSPCBaylor, Coke, Cottle, Fisher, Foard, Hardeman and 17 more116 min
May 15, 6:25 PM CDTTornado WatchSPCArcher, Baylor, Borden, Briscoe, Brown, Callahan and 45 more6 hr
May 15, 6:47 PM CDTMesoscale DiscussionSPCChildress, Collingsworth, Donley, Gray, Hall, Hansford and 6 more58 min
May 15, 6:50 PM CDTTornado WatchSPCArmstrong, Carson, Collingsworth, Dallam, Donley, Gray and 12 more5 hr

Nearby

Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Louisiana, 2003Mesoscale Discussions in Arkansas, 2003Every mesoscale discussion in 2003

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.