Alert archive / Texas / Mesoscale Discussions in 2012

Mesoscale Discussion 2208

December 25, 201215 counties in Oklahoma; 16 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Dec 25, 2012, 9:31 AM CST for 15 counties in Oklahoma; 16 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Dec 25, 2012, 9:31 AM CST (15:31 UTC)
Expired: Dec 25, 2012, 2:30 PM CST
In force: 5 hr
Issued by: the Storm Prediction Center

All 31 counties

Caddo County, OK, Canadian County, OK, Carter County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jackson County, OK, Jefferson County, OK, Kiowa County, OK, Love County, OK, McClain County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Denton County, TX, Hood County, TX, Jack County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Stephens County, TX, Tarrant County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 3.5 hours before the alert went out and 141 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: 524 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 312 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 25, 2:32 AM CST	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Cleveland, Comanche, Creek and 21 more	4 hr
Dec 25, 11:02 AM CST	Mesoscale Discussion	SPC	Caddo, Carter, Comanche, Cotton, Garvin, Grady and 7 more	4 hr
Dec 25, 12:11 PM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Haskell, Johnston and 6 more	5 hr
Dec 25, 2:50 PM CST	Mesoscale Discussion	SPC	Beckham, Caddo, Comanche, Cotton, Custer, Greer and 6 more	4 hr
Dec 25, 1:01 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bell, Bosque, Brazos and 37 more	59 min
Dec 25, 1:37 AM CST	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Bell, Bosque, Brazos, Burleson and 36 more	7 hr
Dec 25, 5:56 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Bell, Bosque, Brazos, Burleson and 38 more	94 min
Dec 25, 7:00 AM CST	Mesoscale Discussion	SPC	Brazoria, Chambers, Galveston, Hardin, Harris, Jasper and 9 more	60 min
Dec 25, 8:46 AM CST	Mesoscale Discussion	SPC	Angelina, Brazoria, Chambers, Cherokee, Fort Bend, Galveston and 26 more	59 min
Dec 25, 9:02 AM CST	Severe Thunderstorm Watch	SPC	Angelina, Cherokee, Gregg, Harrison, Marion, Nacogdoches and 6 more	7 hr
Dec 25, 9:17 AM CST	Tornado Watch	SPC	Austin, Brazoria, Chambers, Fort Bend, Galveston, Grimes and 16 more	8 hr
Dec 25, 12:19 PM CST	Mesoscale Discussion	SPC	Chambers, Galveston, Hardin, Jasper, Jefferson, Newton and 1 more	71 min
Dec 25, 1:00 PM CST	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Collin, Dallas, Delta and 16 more	5 hr

Nearby

Mesoscale Discussions in Texas, 2012 Mesoscale Discussions in Oklahoma, 2012 Every mesoscale discussion in 2012

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.