Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1351

June 12, 20034 counties in Alabama; 7 parishes in Louisiana; 18 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 11:10 AM CDT for 4 counties in Alabama; 7 parishes in Louisiana; 18 counties in Mississippi. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 11:10 AM CDT (16:10 UTC)
Expired: Jun 12, 2003, 12:45 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 29 counties

Choctaw County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Livingston Parish, LA, Orleans Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.2 hours before the alert went out and 62 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1553 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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.

Issued	Product	Office	Counties	Lasted
Jun 11, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	Bibb, Chilton, Coosa, Fayette, Greene, Hale and 10 more	5 hr
Jun 11, 9:18 PM CDT	Mesoscale Discussion	SPC	Bibb, Chilton, Fayette, Greene, Hale, Jefferson and 6 more	87 min
Jun 12, 8:51 AM CDT	Mesoscale Discussion	SPC	Washington	84 min
Jun 12, 9:10 AM CDT	Severe Thunderstorm Watch	SPC	Baldwin, Choctaw, Clarke, Mobile, Washington	5 hr
Jun 12, 1:15 PM CDT	Mesoscale Discussion	SPC	Clarke, Mobile, Washington	60 min
Jun 12, 1:34 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Chambers, Chilton, Clay and 19 more	86 min
Jun 12, 12:30 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	2 hr
Jun 12, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Bossier, Caddo, De Soto	4 hr
Jun 12, 4:20 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	55 min
Jun 12, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 2 more	4 hr
Jun 11, 7:14 PM CDT	Mesoscale Discussion	SPC	Bolivar, Calhoun, Chickasaw, Clay, Coahoma, Grenada and 8 more	2 hr

Nearby

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