Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 1928

November 5, 201511 counties in Oklahoma; 15 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 5, 2015, 2:17 PM CST for 11 counties in Oklahoma; 15 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Nov 5, 2015, 2:17 PM CST (20:17 UTC)
Expired: Nov 5, 2015, 3:45 PM CST
In force: 88 min
Issued by: the Storm Prediction Center

All 26 counties

Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, Marshall County, OK, McIntosh County, OK, Pittsburg County, OK, Pushmataha County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Hood County, TX, Hunt County, TX, Johnson County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 146 km from the middle of the area, began a volume at 20:20 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 533Nov 5, 3:55 PM CST

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.3 hours before the alert went out and 119 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	Beaver, Ellis, Harper, Texas	2 hr
Nov 5, 7:50 AM CST	Mesoscale Discussion	SPC	Caddo, Canadian, Cleveland, Comanche, Cotton, Grady and 4 more	115 min
Nov 5, 10:48 AM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Coal, Garvin, Hughes and 13 more	87 min
Nov 5, 12:06 PM CST	Tornado Watch	SPC	Adair, Atoka, Bryan, Carter, Cherokee, Choctaw and 41 more	8 hr
Nov 5, 3:17 PM CST	Mesoscale Discussion	SPC	Craig, Nowata, Ottawa	118 min
Nov 5, 3:32 PM CST	Mesoscale Discussion	SPC	Choctaw, LeFlore, McCurtain	88 min
Nov 5, 4:00 PM CST	Tornado Watch	SPC	McCurtain	5 hr
Nov 5, 5:55 PM CST	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 11 more	2 hr
Nov 5, 7:20 AM CST	Mesoscale Discussion	SPC	Bandera, Bastrop, Bell, Blanco, Burnet, Caldwell and 14 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in Oklahoma, 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.