Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 795

May 26, 201514 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 26, 2015, 8:51 PM CDT for 14 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: May 26, 2015, 8:51 PM CDT (01:51 UTC)
Expired: May 26, 2015, 10:15 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Callahan County, TX, Comanche County, TX, Eastland County, TX, Erath County, TX, Hood County, TX, Jack County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Wise County, TX, Young County, TX

The radar

The Dyess AFB radar (KDYX), 55 km from the middle of the area, began a volume at 01:53 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 226May 26, 9:25 PM CDT

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.9 hours before the alert went out and 132 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: 2534 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

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
May 26, 8:25 PM CDT	Mesoscale Discussion	SPC	Coke, Coleman, Concho, Irion, Kimble, McCulloch and 6 more	95 min
May 26, 9:27 PM CDT	Severe Thunderstorm Watch	SPC	Bosque, Brown, Callahan, Coleman, Collin, Comanche and 37 more	6 hr
May 26, 11:47 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Comanche, Coryell, Erath and 16 more	88 min
May 27, 4:48 AM CDT	Mesoscale Discussion	SPC	Austin, Chambers, Fort Bend, Hardin, Harris, Jasper and 13 more	117 min
May 27, 11:39 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Blanco, Caldwell, Comal and 16 more	66 min
May 27, 2:13 PM CDT	Mesoscale Discussion	SPC	Childress, Collingsworth, Donley, Gray, Hemphill, Lipscomb and 3 more	92 min
May 27, 2:46 PM CDT	Tornado Watch	SPC	Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 7 more	10 hr
May 27, 3:09 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 18 more	2 hr
May 27, 5:05 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Briscoe, Castro, Cochran and 23 more	115 min
May 27, 6:16 PM CDT	Mesoscale Discussion	SPC	Collingsworth, Donley, Gray, Hansford, Hemphill, Lipscomb and 3 more	119 min

Nearby

Mesoscale Discussions in Texas, 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.