Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 781

May 29, 201620 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2016, 4:56 PM CDT for 20 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 29, 2016, 4:56 PM CDT (21:56 UTC)
Expired: May 29, 2016, 6:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Collin County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Henderson County, TX, Hood County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Somervell County, TX, Tarrant County, TX, Upshur County, TX, Van Zandt County, TX, Wise County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 44 km from the middle of the area, began a volume at 21:59 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, 9.9 hours before the alert went out and 288 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: 1734 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.8

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
May 28, 10:00 PM CDT	Mesoscale Discussion	SPC	Archer, Bandera, Baylor, Bexar, Blanco, Borden and 57 more	60 min
May 29, 7:52 AM CDT	Mesoscale Discussion	SPC	Carson, Collingsworth, Donley, Gray, Hansford, Hemphill and 5 more	2 hr
May 29, 12:48 PM CDT	Mesoscale Discussion	SPC	Armstrong, Bailey, Briscoe, Carson, Castro, Cochran and 19 more	117 min
May 29, 1:53 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Armstrong, Bailey, Baylor, Briscoe, Carson and 45 more	8 hr
May 29, 2:42 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Brewster, Coke, Crane, Crockett and 27 more	2 hr
May 29, 3:57 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Borden, Brewster, Crane, Crockett, Culberson and 22 more	7 hr
May 29, 5:21 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Cottle, Foard, Hall, Haskell and 10 more	114 min

Nearby

Mesoscale Discussions in Texas, 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.