Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1363

June 12, 20034 parishes in Louisiana; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 9:51 PM CDT for 4 parishes in Louisiana; 16 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 9:51 PM CDT (02:51 UTC)
Expired: Jun 12, 2003, 10:45 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Vernon Parish, LA, Chambers County, TX, Fort Bend County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX, Walker County, TX, Waller County, TX

The radar

The Houston radar (KHGX), 106 km from the middle of the area, began a volume at 02:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.9 hours before the alert went out and 124 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: 634 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 925 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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
Jun 12, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	Beauregard, Calcasieu, Cameron, Vernon	5 hr
Jun 13, 12:16 PM CDT	Mesoscale Discussion	SPC	Allen, Beauregard, Calcasieu, Grant, LaSalle, Natchitoches and 3 more	119 min
Jun 13, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	Acadia, Allen, Ascension, Avoyelles, Beauregard, Calcasieu and 21 more	5 hr
Jun 13, 6:13 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Avoyelles, Beauregard, Calcasieu and 21 more	92 min
Jun 12, 7:13 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Bosque, Brown, Callahan, Childress and 29 more	92 min
Jun 13, 12:02 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Collin, Cooke, Dallas and 20 more	88 min
Jun 13, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Archer, Armstrong, Baylor, Briscoe, Carson, Childress and 18 more	5 hr
Jun 13, 5:11 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Denton, Hardeman and 7 more	64 min
Jun 13, 10:26 AM CDT	Mesoscale Discussion	SPC	Coke, Concho, Crockett, Irion, McCulloch, Menard and 3 more	94 min
Jun 13, 12:15 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Borden, Brown, Burnet, Callahan, Coke and 31 more	6 hr
Jun 13, 2:21 PM CDT	Mesoscale Discussion	SPC	Bastrop, Brazos, Burleson, Grimes, Hardin, Harris and 14 more	54 min
Jun 13, 2:56 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Brown, Callahan, Coke, Coleman and 20 more	2 hr
Jun 13, 3:00 PM CDT	Severe Thunderstorm Watch	SPC	Austin, Bandera, Bastrop, Bexar, Blanco, Brazos and 40 more	5 hr
Jun 13, 3:20 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 21 more	85 min
Jun 13, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Carson, Childress, Collingsworth, Dallam, Deaf Smith and 15 more	5 hr
Jun 13, 4:54 PM CDT	Mesoscale Discussion	SPC	Austin, Bandera, Bastrop, Bexar, Blanco, Brazos and 42 more	96 min
Jun 13, 5:13 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Cochran, Crane, Dawson, Ector and 11 more	62 min
Jun 13, 5:40 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Bailey, Borden, Castro, Cochran, Coke and 29 more	5 hr
Jun 13, 6:55 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bee, Calhoun, DeWitt, Duval and 15 more	5 hr

Nearby

Mesoscale Discussions in Texas, 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; radar from the NEXRAD Level II archive.