Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 363

April 11, 20164 counties in Oklahoma; 39 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 11, 2016, 12:39 PM CDT for 4 counties in Oklahoma; 39 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 11, 2016, 12:39 PM CDT (17:39 UTC)
Expired: Apr 11, 2016, 2:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 43 counties

Carter County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Archer County, TX, Baylor County, TX, Camp County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Knox County, TX, Lamar County, TX, Limestone County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Throckmorton County, TX, Titus County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 52 km from the middle of the area, began a volume at 17:39 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.

Severe Thunderstorm Watch 85Apr 11, 1:35 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 5.7 hours before the alert went out and 25 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: 1237 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 331 m²/s²
0-3 km storm-relative helicity: 347 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:36 PM CDT	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Carter, Cleveland, Coal and 23 more	114 min
Apr 10, 8:42 PM CDT	Mesoscale Discussion	SPC	Craig, Kay, Nowata, Osage, Ottawa, Rogers and 1 more	2 hr
Apr 10, 9:31 PM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Canadian, Carter, Cleveland, Comanche and 17 more	59 min
Apr 10, 9:52 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 24 more	6 hr
Apr 10, 11:23 PM CDT	Mesoscale Discussion	SPC	Craig, Nowata, Osage, Ottawa, Rogers, Washington	37 min
Apr 11, 12:21 AM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Coal, Garvin, Hughes, Jefferson and 10 more	54 min
Apr 11, 12:57 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Cherokee, Choctaw, Creek, Haskell, Latimer and 10 more	4 hr
Apr 11, 6:15 AM CDT	Mesoscale Discussion	SPC	Bryan, Carter, Choctaw, Jefferson, Johnston, Love and 1 more	3 hr
Apr 11, 1:38 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 9 more	9 hr
Apr 10, 8:54 PM CDT	Mesoscale Discussion	SPC	Dimmit, Edwards, Kinney, Maverick, Real, Uvalde and 2 more	66 min
Apr 10, 11:06 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Comal, Dimmit, Frio and 9 more	54 min
Apr 11, 11:48 AM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion	2 hr
Apr 11, 1:05 PM CDT	Severe Thunderstorm Watch	SPC	Jasper, Newton, Sabine	6 hr
Apr 11, 1:43 PM CDT	Mesoscale Discussion	SPC	Austin, Brazos, Grimes, Hardin, Harris, Liberty and 8 more	3 hr
Apr 11, 3:26 PM CDT	Mesoscale Discussion	SPC	Clay, Collin, Cooke, Dallas, Delta, Denton and 18 more	94 min
Apr 11, 3:42 PM CDT	Mesoscale Discussion	SPC	Newton, Sabine	93 min
Apr 11, 4:49 PM CDT	Mesoscale Discussion	SPC	Collin, Dallas, Denton, Hunt, Rains, Rockwall and 1 more	86 min
Apr 11, 5:27 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Fisher, Haskell, Jones, King and 7 more	93 min
Apr 11, 6:09 PM CDT	Mesoscale Discussion	SPC	Newton, Sabine	66 min
Apr 11, 6:58 PM CDT	Severe Thunderstorm Watch	SPC	Cherokee, Nacogdoches, Panola, Rusk, Shelby	5 hr

Nearby

Mesoscale Discussions in Texas, 2016 Mesoscale Discussions in Oklahoma, 2016 Every mesoscale discussion in 2016

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.