Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 2553

November 23, 200327 parishes in Louisiana; 37 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Nov 23, 2003, 5:38 PM CST for 27 parishes in Louisiana; 37 counties in Mississippi. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Nov 23, 2003, 5:38 PM CST (23:38 UTC)
Expired: Nov 23, 2003, 7:15 PM CST
In force: 97 min
Issued by: the Storm Prediction Center

All 64 counties

Acadia Parish, LA, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Hinds County, MS, Holmes County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson County, MS, Yazoo County, MS

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.6 hours before the alert went out and 270 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: 14 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 235 m²/s²
0-3 km storm-relative helicity: 261 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.

Issued	Product	Office	Counties	Lasted
Nov 23, 12:15 PM CST	Mesoscale Discussion	SPC	Beauregard, Bienville, Calcasieu, Grant, Jackson, Lincoln and 6 more	3 hr
Nov 23, 1:40 PM CST	Severe Thunderstorm Watch	SPC	Bienville, Caldwell, East Carroll, Franklin, Jackson, Lincoln and 8 more	5 hr
Nov 23, 3:48 PM CST	Mesoscale Discussion	SPC	Caldwell, East Carroll, Franklin, Madison, Morehouse, Ouachita and 3 more	117 min
Nov 23, 12:59 PM CST	Mesoscale Discussion	SPC	Bolivar, Coahoma, DeSoto, Panola, Quitman, Sunflower and 2 more	3 hr

Nearby

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