Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 2323

November 15, 201116 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 15, 2011, 10:35 AM CST for 16 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Nov 15, 2011, 10:35 AM CST (16:35 UTC)
Expired: Nov 15, 2011, 12:30 PM CST
In force: 115 min
Issued by: the Storm Prediction Center

Counties Atascosa County, TX, Bexar County, TX, Blanco County, TX, Comal County, TX, Duval County, TX, Frio County, TX, Gillespie County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Medina County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 130 km from the middle of the area, began a volume at 16:35 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 12:00Z, 4.6 hours before the alert went out and 181 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: 1492 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 2.0
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
Nov 15, 12:02 AM CST	Mesoscale Discussion	SPC	Bandera, Bexar, Dimmit, Edwards, Frio, Kerr and 8 more	2 hr
Nov 15, 2:14 AM CST	Severe Thunderstorm Watch	SPC	Bandera, Dimmit, Edwards, Frio, Gillespie, Kendall and 10 more	7 hr
Nov 15, 5:35 AM CST	Mesoscale Discussion	SPC	Atascosa, Bexar, Blanco, Comal, Duval, Frio and 10 more	85 min
Nov 15, 6:38 AM CST	Severe Thunderstorm Watch	SPC	Atascosa, Bastrop, Bexar, Blanco, Caldwell, Comal and 10 more	6 hr
Nov 15, 8:57 AM CST	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Austin, Brazoria, Brazos, Burleson and 38 more	9 hr
Nov 15, 2:30 PM CST	Mesoscale Discussion	SPC	Angelina, Chambers, Galveston, Hardin, Houston, Jasper and 15 more	2 hr
Nov 15, 3:49 PM CST	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Delta, Fannin, Franklin and 6 more	116 min
Nov 15, 5:44 PM CST	Mesoscale Discussion	SPC	Newton, Orange, Sabine	61 min
Nov 15, 5:56 PM CST	Tornado Watch	SPC	Newton, Orange, Sabine	7 hr

Nearby

Mesoscale Discussions in Texas, 2011 Every mesoscale discussion in 2011

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.