Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1230

June 12, 200426 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2004, 6:10 PM CDT for 26 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2004, 6:10 PM CDT (23:10 UTC)
Expired: Jun 12, 2004, 7:45 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

All 26 counties

Brewster County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 62 km from the middle of the area, began a volume at 23:11 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.

Severe Thunderstorm Watch 455Jun 12, 9:05 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.2 hours before the alert went out and 113 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: 1156 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1627 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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, 8:17 PM CDT	Mesoscale Discussion	SPC	Baylor, Coke, Cottle, Fisher, Foard, Glasscock and 15 more	88 min
Jun 11, 10:50 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Coke, Coleman, Fisher and 15 more	85 min
Jun 11, 10:54 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Coke, Coleman, Fisher and 15 more	96 min
Jun 12, 1:12 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Jack, Knox, Montague and 5 more	2 hr
Jun 12, 2:40 PM CDT	Tornado Watch	SPC	Archer, Baylor, Childress, Clay, Cottle, Dickens and 12 more	8 hr
Jun 12, 3:08 PM CDT	Mesoscale Discussion	SPC	Borden, Coke, Crane, Crockett, Fisher, Glasscock and 11 more	2 hr
Jun 12, 3:25 PM CDT	Tornado Watch	SPC	Brewster, Callahan, Coke, Concho, Crockett, Fisher and 19 more	6 hr
Jun 12, 5:37 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Cottle, Dickens and 12 more	83 min

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.