Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 400

March 26, 2005Baldwin County, Mobile County, Washington County, Alabama; 36 parishes in Louisiana; 34 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2005, 1:14 PM CST for Baldwin County, Mobile County, Washington County, Alabama; 36 parishes in Louisiana; 34 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 26, 2005, 1:14 PM CST (19:14 UTC)
Expired
Mar 26, 2005, 3:15 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 73 counties

Baldwin County, AL, Mobile County, AL, Washington County, AL, Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Madison Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Hinds County, MS, Issaquena County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson 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, 7.2 hours before the alert went out and 121 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 2005-03-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 151 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 2005-03-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939587897117136Sfc1 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
151 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Mar 26, 9:07 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Clarke and 20 more113 min
Mar 26, 9:40 AM CSTSevere Thunderstorm WatchSPCBaldwin, Butler, Clarke, Coffee, Conecuh, Covington and 10 more6 hr
Mar 26, 1:45 PM CSTTornado WatchSPCBaldwin, Barbour, Bullock, Butler, Choctaw, Clarke and 21 more7 hr
Mar 26, 4:51 PM CSTMesoscale DiscussionSPCHenry, Houston54 min
Mar 26, 5:54 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Bullock, Butler, Chilton, Choctaw and 20 more66 min
Mar 26, 3:14 PM CSTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Caldwell, Catahoula, Concordia and 14 more31 min
Mar 26, 3:30 PM CSTTornado WatchSPCAllen, Avoyelles, Beauregard, Calcasieu, Caldwell, Catahoula and 20 more8 hr
Mar 26, 4:42 PM CSTMesoscale DiscussionSPCBenton, Bolivar, Coahoma, DeSoto, Marshall, Panola and 3 more2 hr

Nearby

Mesoscale Discussions in Louisiana, 2005Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in Alabama, 2005Every mesoscale discussion in 2005

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.