Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1353

June 12, 200311 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 1:31 PM CDT for 11 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2003, 1:31 PM CDT (18:31 UTC)
Expired: Jun 12, 2003, 3:30 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center

Counties Brazos County, TX, Burleson County, TX, Grimes County, TX, Jasper County, TX, Montgomery County, TX, Newton County, TX, Polk County, TX, San Jacinto County, TX, Tyler County, TX, Walker County, TX, Washington County, TX

The radar

The Houston radar (KHGX), 140 km from the middle of the area, began a volume at 18:31 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 12:00Z, 6.5 hours before the alert went out and 221 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: 3708 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 14.4

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 11, 7:13 PM CDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Coleman, Concho, Crockett and 29 more	62 min
Jun 11, 8:04 PM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Bosque, Brown, Burnet, Caldwell and 27 more	86 min
Jun 11, 8:15 PM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 29 more	6 hr
Jun 11, 9:15 PM CDT	Severe Thunderstorm Watch	SPC	Bell, Bosque, Collin, Coryell, Dallas, Denton and 19 more	5 hr
Jun 11, 11:10 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 29 more	65 min
Jun 11, 11:49 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Collin, Coryell, Dallas, Denton and 20 more	86 min
Jun 12, 12:14 AM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Marion, Morris and 3 more	2 hr
Jun 12, 12:30 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazos, Burleson, Camp and 34 more	2 hr
Jun 12, 1:10 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Austin, Bowie, Brazoria, Brazos and 39 more	4 hr
Jun 12, 1:30 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Denton, Foard and 16 more	2 hr
Jun 12, 4:20 AM CDT	Mesoscale Discussion	SPC	Angelina, Austin, Brazoria, Cass, Colorado, Fort Bend and 21 more	55 min
Jun 12, 1:56 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Concho, Eastland and 11 more	2 hr
Jun 12, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Bosque, Brown, Callahan, Childress and 29 more	6 hr
Jun 12, 5:59 PM CDT	Mesoscale Discussion	SPC	Armstrong, Carson, Dallam, Deaf Smith, Donley, Gray and 11 more	91 min

Nearby

Mesoscale Discussions in Texas, 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.