Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 312

March 19, 200515 parishes in Louisiana; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 19, 2005, 5:32 PM CST for 15 parishes in Louisiana; 6 counties in Texas. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Mar 19, 2005, 5:32 PM CST (23:32 UTC)
Expired: Mar 19, 2005, 7:30 PM CST
In force: 118 min
Issued by: the Storm Prediction Center

All 21 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Tyler County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.5 hours before the alert went out and 37 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: 51 J/kg
Mixed-layer CIN: -183 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 220 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
Mar 19, 12:46 PM CST	Mesoscale Discussion	SPC	Austin, Bandera, Bastrop, Blanco, Burleson, Burnet and 15 more	119 min
Mar 19, 1:40 PM CST	Severe Thunderstorm Watch	SPC	Bandera, Bastrop, Bexar, Blanco, Caldwell, Comal and 15 more	7 hr
Mar 19, 3:27 PM CST	Mesoscale Discussion	SPC	Atascosa, Bastrop, Bexar, Blanco, Burleson, Caldwell and 15 more	93 min
Mar 19, 4:38 PM CST	Mesoscale Discussion	SPC	Angelina, Atascosa, Austin, Bee, Brazos, Burleson and 32 more	67 min
Mar 19, 5:00 PM CST	Severe Thunderstorm Watch	SPC	Angelina, Aransas, Austin, Bastrop, Bee, Brazoria and 38 more	7 hr

Nearby

Mesoscale Discussions in Louisiana, 2005 Mesoscale Discussions in Texas, 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.