Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 267

March 10, 2013Beauregard Parish, Calcasieu Parish, Vernon Parish, Louisiana; 9 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 10, 2013, 7:50 AM CDT for Beauregard Parish, Calcasieu Parish, Vernon Parish, Louisiana; 9 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Mar 10, 2013, 7:50 AM CDT (12:50 UTC)
Expired: Mar 10, 2013, 8:45 AM CDT
In force: 55 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Beauregard Parish, LA, Calcasieu Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Liberty County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, Tyler County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 0.8 hours before the alert went out and 107 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: 194 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 436 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 417 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

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
Mar 9, 7:23 PM CST	Mesoscale Discussion	SPC	Bandera, Blanco, Burnet, Comal, Gillespie, Hays and 9 more	67 min
Mar 9, 7:45 PM CST	Severe Thunderstorm Watch	SPC	Bandera, Bastrop, Bell, Bexar, Blanco, Burnet and 24 more	6 hr
Mar 9, 10:10 PM CST	Mesoscale Discussion	SPC	Bandera, Bexar, Blanco, Comal, Hays, Kendall and 3 more	95 min
Mar 10, 1:33 AM CST	Mesoscale Discussion	SPC	Bastrop, Bell, Bexar, Caldwell, Comal, Falls and 12 more	57 min

Nearby

Mesoscale Discussions in Texas, 2013 Mesoscale Discussions in Louisiana, 2013 Every mesoscale discussion in 2013

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.