Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 1599

July 2, 200526 parishes in Louisiana; 17 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2005, 4:44 PM CDT for 26 parishes in Louisiana; 17 counties in Mississippi. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jul 2, 2005, 4:44 PM CDT (21:44 UTC)
Expired: Jul 2, 2005, 6:15 PM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 43 counties

Allen Parish, LA, Ascension Parish, LA, Avoyelles Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Iberville Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hancock County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.7 hours before the alert went out and 182 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: 1159 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 739 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 17 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
Jul 2, 10:06 AM CDT	Mesoscale Discussion	SPC	Bienville, Caddo, Caldwell, De Soto, Grant, Jackson and 7 more	114 min
Jul 2, 11:40 AM CDT	Severe Thunderstorm Watch	SPC	Allen, Beauregard, Caldwell, De Soto, Evangeline, Grant and 7 more	6 hr
Jul 2, 12:58 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Bienville, Caldwell and 13 more	92 min
Jul 2, 2:33 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Avoyelles, Beauregard, Caldwell and 26 more	87 min
Jul 2, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	Ascension, Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana and 14 more	6 hr
Jul 2, 6:54 PM CDT	Mesoscale Discussion	SPC	Ascension, Livingston, Orleans, Saint Bernard, Saint Charles, Saint Helena and 5 more	96 min

Nearby

Mesoscale Discussions in Louisiana, 2005 Mesoscale Discussions in Mississippi, 2005 Every 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.