Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 1924

November 5, 201520 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 5, 2015, 7:20 AM CST for 20 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Nov 5, 2015, 7:20 AM CST (13:20 UTC)
Expired: Nov 5, 2015, 9:45 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Bandera County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, Gillespie County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Real County, TX, San Saba County, TX, Travis County, TX, Williamson County, TX

The radar

The Austin/San Antonio radar (KEWX), 99 km from the middle of the area, began a volume at 13:23 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

Fort Worth, TX (KFWD), launched 12:00Z, 1.3 hours before the alert went out and 313 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: 227 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 335 m²/s²
0-3 km storm-relative helicity: 374 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 10.2

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 4, 6:35 PM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Collingsworth, Donley, Gray and 11 more	2 hr
Nov 5, 7:50 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	115 min
Nov 5, 10:48 AM CST	Mesoscale Discussion	SPC	Clay, Collin, Cooke, Denton, Fannin, Grayson and 8 more	87 min
Nov 5, 12:06 PM CST	Tornado Watch	SPC	Archer, Bosque, Brown, Callahan, Clay, Coleman and 38 more	8 hr
Nov 5, 2:17 PM CST	Mesoscale Discussion	SPC	Collin, Cooke, Dallas, Denton, Fannin, Grayson and 9 more	88 min
Nov 5, 3:32 PM CST	Mesoscale Discussion	SPC	Bowie, Camp, Delta, Franklin, Hopkins, Lamar and 4 more	88 min
Nov 5, 4:00 PM CST	Tornado Watch	SPC	Bowie, Camp, Cass, Franklin, Morris, Red River and 1 more	5 hr
Nov 5, 5:55 PM CST	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coleman, Collin, Comanche and 40 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2015 Every mesoscale discussion in 2015

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.