Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 998

June 12, 201536 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2015, 8:01 PM CDT for 36 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2015, 8:01 PM CDT (01:01 UTC)
Expired: Jun 12, 2015, 9:30 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center

All 36 counties

Andrews County, TX, Armstrong County, TX, Borden County, TX, Briscoe County, TX, Castro County, TX, Cochran County, TX, Collingsworth County, TX, Crane County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Donley County, TX, Ector County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Glasscock County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, Howard County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Midland County, TX, Motley County, TX, Pecos County, TX, Randall County, TX, Reagan County, TX, Swisher County, TX, Terry County, TX, Upton County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX

The radar

The Midland/Odessa radar (KMAF), 37 km from the middle of the area, began a volume at 01:03 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

Del Rio, TX (KDLF), launched 00:00Z, 1.0 hours before the alert went out and 348 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: 799 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1715 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.2

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
Jun 12, 8:55 PM CDT	Mesoscale Discussion	SPC	Hardeman	65 min
Jun 13, 7:54 AM CDT	Mesoscale Discussion	SPC	Bailey, Castro, Cochran, Deaf Smith, Hale, Hockley and 4 more	2 hr
Jun 13, 1:22 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Cochran, Crane, Ector, Gaines and 10 more	2 hr
Jun 13, 2:03 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Armstrong, Bailey, Borden, Brewster, Briscoe and 41 more	8 hr
Jun 13, 3:15 PM CDT	Mesoscale Discussion	SPC	Baylor, Clay, Jack, Knox, Montague, Throckmorton and 1 more	90 min
Jun 13, 3:49 PM CDT	Mesoscale Discussion	SPC	Andrews, Bailey, Borden, Briscoe, Castro, Cochran and 32 more	56 min
Jun 13, 5:56 PM CDT	Mesoscale Discussion	SPC	Andrews, Armstrong, Bailey, Castro, Cochran, Crane and 25 more	94 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.