Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 543

April 23, 200313 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2003, 2:12 PM CDT for 13 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2003, 2:12 PM CDT (19:12 UTC)
Expired: Apr 23, 2003, 3:45 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Bandera County, TX, Crockett County, TX, Edwards County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Mason County, TX, Menard County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Uvalde County, TX, Val Verde County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 148Apr 23, 2:35 PM CDT

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 7.2 hours before the alert went out and 69 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: 1151 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 302 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 11.1

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
Apr 22, 7:32 PM CDT	Mesoscale Discussion	SPC	Gaines, Martin	88 min
Apr 23, 12:04 AM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 27 more	116 min
Apr 23, 1:05 AM CDT	Severe Thunderstorm Watch	SPC	Bailey, Castro, Cochran, Dallam, Deaf Smith, Hartley and 10 more	6 hr
Apr 23, 2:58 AM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Briscoe, Childress, Coke, Collingsworth and 25 more	2 hr
Apr 23, 3:59 AM CDT	Mesoscale Discussion	SPC	Bailey, Castro, Cochran, Deaf Smith, Hale, Hartley and 13 more	2 hr
Apr 23, 10:30 AM CDT	Mesoscale Discussion	SPC	Armstrong, Baylor, Borden, Briscoe, Childress, Coke and 41 more	90 min
Apr 23, 11:50 AM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Childress, Clay and 30 more	6 hr
Apr 23, 1:26 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Childress, Clay and 27 more	94 min
Apr 23, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	Crockett, Edwards, Kimble, Kinney, Mason, Menard and 4 more	5 hr
Apr 23, 3:08 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Bosque, Brown, Callahan, Childress and 48 more	97 min
Apr 23, 4:00 PM CDT	Tornado Watch	SPC	Bosque, Collin, Comanche, Cooke, Coryell, Dallas and 25 more	6 hr
Apr 23, 4:02 PM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Kimble, Kinney, Mason, Menard and 5 more	88 min
Apr 23, 5:36 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 13 more	54 min
Apr 23, 6:00 PM CDT	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 15 more	4 hr

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.