Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 695

May 2, 200317 counties in Arkansas; 18 parishes in Louisiana; 27 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 6:31 PM CDT for 17 counties in Arkansas; 18 parishes in Louisiana; 27 counties in Mississippi. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
May 2, 2003, 6:31 PM CDT (23:31 UTC)
Expired
May 2, 2003, 8:30 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
All 62 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Lafayette County, AR, Lincoln County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Choctaw County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Webster County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Little Rock radar (KLZK), 179 km from the middle of the area, began a volume at 23:31 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 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, 11.5 hours before the alert went out and 174 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 2003-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2608 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 2003-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
2608 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
800 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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 1, 8:54 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more96 min
May 1, 9:00 PM CDTSevere Thunderstorm WatchSPCClark, Columbia, Garland, Hempstead, Hot Spring, Howard and 10 more4 hr
May 1, 11:53 PM CDTMesoscale DiscussionSPCClark, Columbia, Garland, Hempstead, Hot Spring, Howard and 10 more67 min
May 2, 1:27 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Craighead, Fulton and 8 more2 hr
May 2, 2:21 PM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Columbia, Desha, Drew and 1 more114 min
May 2, 2:55 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 13 more6 hr
May 2, 1:43 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Chickasaw, Clay, DeSoto and 20 more92 min
May 2, 1:55 PM CDTSevere Thunderstorm WatchSPCAlcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 10 more5 hr
May 2, 3:25 PM CDTSevere Thunderstorm WatchSPCNoxubee4 hr
May 2, 5:36 PM CDTMesoscale DiscussionSPCAlcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 10 more84 min

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; radar from the NEXRAD Level II archive.