Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 163

March 4, 200433 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2004, 10:46 AM CST for 33 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Mar 4, 2004, 10:46 AM CST (16:46 UTC)
Expired: Mar 4, 2004, 12:15 PM CST
In force: 89 min
Issued by: the Storm Prediction Center

All 33 counties

Atascosa County, TX, Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Burnet County, TX, Comal County, TX, Coryell County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Hood County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, Medina County, TX, Mills County, TX, Real County, TX, San Saba County, TX, Somervell County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 118 km from the middle of the area, began a volume at 16:50 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 watches that followed

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

Tornado Watch 23Mar 4, 11:50 AM CST

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 4.8 hours before the alert went out and 169 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: 1872 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 12.6

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
Mar 3, 7:03 PM CST	Mesoscale Discussion	SPC	Andrews, Borden, Coke, Crane, Crockett, Dawson and 25 more	117 min
Mar 3, 8:40 PM CST	Severe Thunderstorm Watch	SPC	Andrews, Borden, Cottle, Crane, Crosby, Dawson and 20 more	5 hr
Mar 3, 11:44 PM CST	Mesoscale Discussion	SPC	Andrews, Borden, Crane, Crosby, Dawson, Dickens and 16 more	2 hr
Mar 4, 1:56 AM CST	Mesoscale Discussion	SPC	Archer, Bailey, Baylor, Briscoe, Brown, Castro and 55 more	94 min
Mar 4, 2:00 AM CST	Severe Thunderstorm Watch	SPC	Andrews, Archer, Armstrong, Bailey, Baylor, Borden and 39 more	5 hr
Mar 4, 2:44 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Collingsworth, Cottle and 19 more	3 hr
Mar 4, 4:25 AM CST	Tornado Watch	SPC	Callahan, Coke, Coleman, Concho, Crockett, Fisher and 23 more	6 hr
Mar 4, 5:01 AM CST	Mesoscale Discussion	SPC	Andrews, Archer, Armstrong, Bailey, Baylor, Borden and 39 more	119 min
Mar 4, 5:32 AM CST	Mesoscale Discussion	SPC	Callahan, Coke, Coleman, Concho, Crockett, Fisher and 23 more	118 min
Mar 4, 6:55 AM CST	Severe Thunderstorm Watch	SPC	Armstrong, Baylor, Borden, Briscoe, Carson, Childress and 30 more	6 hr
Mar 4, 8:43 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Coke, Coleman, Concho and 26 more	62 min
Mar 4, 9:28 AM CST	Mesoscale Discussion	SPC	Cooke, Fannin, Grayson, Lamar, Montague	62 min
Mar 4, 9:45 AM CST	Tornado Watch	SPC	Archer, Baylor, Brown, Callahan, Clay, Coke and 34 more	5 hr
Mar 4, 11:50 AM CST	Tornado Watch	SPC	Bandera, Bell, Blanco, Bosque, Brown, Burnet and 42 more	5 hr
Mar 4, 11:52 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 17 more	53 min
Mar 4, 11:52 AM CST	Mesoscale Discussion	SPC	Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 15 more	113 min
Mar 4, 1:02 PM CST	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Jack, Montague, Palo Pinto and 6 more	88 min
Mar 4, 1:25 PM CST	Mesoscale Discussion	SPC	Fannin	65 min
Mar 4, 1:42 PM CST	Mesoscale Discussion	SPC	Bell, Blanco, Bosque, Burnet, Collin, Coryell and 17 more	63 min
Mar 4, 2:05 PM CST	Tornado Watch	SPC	Cooke	6 hr
Mar 4, 2:18 PM CST	Mesoscale Discussion	SPC	Anderson, Bowie, Camp, Cass, Cherokee, Delta and 18 more	57 min
Mar 4, 3:00 PM CST	Tornado Watch	SPC	Anderson, Bowie, Camp, Cass, Cherokee, Delta and 25 more	6 hr
Mar 4, 4:41 PM CST	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 6 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2004 Every mesoscale discussion in 2004

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.