Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 233

February 15, 20089 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 15, 2008, 7:00 PM CST for 9 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Feb 15, 2008, 7:00 PM CST (01:00 UTC)
Expired: Feb 15, 2008, 8:30 PM CST
In force: 90 min
Issued by: the Storm Prediction Center

Counties Atascosa County, TX, Bexar County, TX, Dimmit County, TX, Frio County, TX, Guadalupe County, TX, Karnes County, TX, La Salle County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 125 km from the middle of the area, began a volume at 01:03 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

Corpus Christi, TX (KCRP), launched 00:00Z, 1.0 hours before the alert went out and 188 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: 1515 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 552 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 10.7

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
Feb 15, 10:38 PM CST	Mesoscale Discussion	SPC	Austin, Grimes, Hardin, Harris, Jasper, Liberty and 7 more	97 min
Feb 15, 11:43 PM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 24 more	5 hr
Feb 16, 1:09 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Archer, Baylor, Camp, Chambers and 58 more	66 min
Feb 16, 2:53 AM CST	Mesoscale Discussion	SPC	Borden, Coke, Concho, Edwards, Fisher, Glasscock and 16 more	67 min
Feb 16, 6:36 AM CST	Mesoscale Discussion	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 12 more	4 hr
Feb 16, 10:00 AM CST	Mesoscale Discussion	SPC	Archer, Bandera, Baylor, Brown, Callahan, Clay and 39 more	90 min
Feb 16, 12:01 PM CST	Mesoscale Discussion	SPC	Bastrop, Bell, Blanco, Bosque, Brown, Burnet and 30 more	89 min
Feb 16, 12:35 PM CST	Severe Thunderstorm Watch	SPC	Bandera, Bell, Blanco, Bosque, Brown, Burnet and 50 more	6 hr
Feb 16, 2:00 PM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bee, Brazoria, Brazos and 49 more	90 min
Feb 16, 2:26 PM CST	Tornado Watch	SPC	Anderson, Angelina, Austin, Bastrop, Brazoria, Brazos and 54 more	6 hr
Feb 16, 3:31 PM CST	Mesoscale Discussion	SPC	Bandera, Bell, Blanco, Bosque, Brown, Burnet and 41 more	59 min
Feb 16, 5:57 PM CST	Mesoscale Discussion	SPC	Angelina, Austin, Brazoria, Chambers, Cherokee, Colorado and 29 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.