Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1318

June 11, 200331 counties in Alabama; 34 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 10:33 AM CDT for 31 counties in Alabama; 34 counties in Mississippi. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Jun 11, 2003, 10:33 AM CDT (15:33 UTC)
Expired
Jun 11, 2003, 12:00 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 65 counties

Autauga County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Geneva County, AL, Greene County, AL, Hale County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Shelby County, AL, Sumter County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Amite County, MS, Attala County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Greene County, MS, Hinds County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Winston County, MS, Yazoo County, MS

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, 3.6 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 2003-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2028 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 2003-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.193958Sfc1 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
2028 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
740 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.5

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
Jun 11, 9:21 AM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Marion and 1 more54 min
Jun 11, 10:45 AM CDTSevere Thunderstorm WatchSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 4 more5 hr
Jun 11, 11:50 AM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 23 more4 hr
Jun 11, 12:26 PM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 4 more64 min
Jun 11, 3:01 PM CDTMesoscale DiscussionSPCColbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 3 more29 min
Jun 11, 3:25 PM CDTSevere Thunderstorm WatchSPCBlount, Cherokee, Cullman, DeKalb, Etowah, Jackson and 6 more5 hr
Jun 11, 3:30 PM CDTSevere Thunderstorm WatchSPCColbert, Franklin, Lamar, Lauderdale, Marion5 hr
Jun 11, 4:57 PM CDTMesoscale DiscussionSPCBlount, Cherokee, Colbert, Cullman, DeKalb, Etowah and 11 more93 min
Jun 11, 4:53 AM CDTMesoscale DiscussionSPCBolivar, Coahoma, DeSoto, Quitman, Tate, Tunica3 hr
Jun 11, 6:10 AM CDTSevere Thunderstorm WatchSPCBolivar, Humphreys, Sunflower, Washington5 hr
Jun 11, 7:54 AM CDTMesoscale DiscussionSPCBolivar, Humphreys, Sunflower, Washington2 hr
Jun 11, 1:53 PM CDTMesoscale DiscussionSPCBolivar, Coahoma, Tunica67 min

Nearby

Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Alabama, 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.