Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 2083

December 27, 2015Jefferson County, Love County, Marshall County, Oklahoma; 30 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 27, 2015, 12:04 PM CST for Jefferson County, Love County, Marshall County, Oklahoma; 30 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Dec 27, 2015, 12:04 PM CST (18:04 UTC)
Expired: Dec 27, 2015, 2:30 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 33 counties

Jefferson County, OK, Love County, OK, Marshall County, OK, Archer County, TX, Bosque County, TX, Clay County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, McLennan County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 41 km from the middle of the area, began a volume at 18:07 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

Norman, OK (KOUN), launched 12:00Z, 6.1 hours before the alert went out and 257 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 489 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 723 m²/s²
0-3 km storm-relative helicity: 824 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Dec 26, 7:32 PM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Latimer and 5 more	88 min
Dec 26, 11:27 PM CST	Mesoscale Discussion	SPC	Choctaw, LeFlore, McCurtain, Pushmataha	2 hr
Dec 27, 3:38 AM CST	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 11 more	6 hr
Dec 27, 4:36 AM CST	Mesoscale Discussion	SPC	Beaver, Ellis, Texas	6 hr
Dec 27, 9:50 AM CST	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 16 more	6 hr
Dec 27, 3:55 PM CST	Mesoscale Discussion	SPC	Beckham, Caddo, Canadian, Cleveland, Comanche, Cotton and 10 more	4 hr
Dec 26, 8:09 PM CST	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Coleman, Concho, Crockett and 21 more	2 hr
Dec 26, 8:58 PM CST	Severe Thunderstorm Watch	SPC	Bandera, Crockett, Edwards, Gillespie, Kerr, Kimble and 11 more	7 hr
Dec 26, 11:21 PM CST	Mesoscale Discussion	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Cochran and 17 more	5 hr
Dec 26, 11:48 PM CST	Mesoscale Discussion	SPC	Concho, Edwards, Gillespie, Kerr, Kimble, Kinney and 11 more	87 min
Dec 27, 5:15 AM CST	Mesoscale Discussion	SPC	Andrews, Cochran, Crane, Culberson, Ector, Gaines and 10 more	5 hr
Dec 27, 5:44 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bastrop, Bowie, Brazos and 44 more	3 hr
Dec 27, 8:56 AM CST	Tornado Watch	SPC	Anderson, Angelina, Austin, Bowie, Brazos, Burleson and 42 more	10 hr
Dec 27, 11:24 AM CST	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Castro, Cochran, Crane and 24 more	6 hr
Dec 27, 12:45 PM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bowie, Brazos, Burleson and 42 more	2 hr
Dec 27, 2:27 PM CST	Mesoscale Discussion	SPC	Bowie, Cass, Harrison, Jasper, Jefferson, Marion and 8 more	63 min
Dec 27, 2:47 PM CST	Tornado Watch	SPC	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 18 more	7 hr
Dec 27, 3:19 PM CST	Mesoscale Discussion	SPC	Brazoria, Chambers, Fort Bend, Galveston, Harris, Houston and 7 more	116 min
Dec 27, 4:55 PM CST	Mesoscale Discussion	SPC	Cass, Harrison, Marion, Nacogdoches, Panola, Rusk and 3 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.