Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 737

May 24, 201510 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 24, 2015, 2:12 AM CDT for 10 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 24, 2015, 2:12 AM CDT (07:12 UTC)
Expired: May 24, 2015, 3:45 AM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Aransas County, TX, Brazoria County, TX, Calhoun County, TX, Cameron County, TX, Fort Bend County, TX, Jackson County, TX, Matagorda County, TX, Refugio County, TX, Victoria County, TX, Wharton County, TX

The radar

The Corpus Christi radar (KCRP), 94 km from the middle of the area, began a volume at 07:16 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

Corpus Christi, TX (KCRP), launched 00:00Z, 7.2 hours before the alert went out and 82 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: 1269 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1093 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 23, 8:39 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 18 more	2 hr
May 23, 8:57 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Cooke, Denton, Fannin and 7 more	93 min
May 23, 9:46 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bell, Bosque, Brazos, Burleson and 28 more	89 min
May 23, 10:00 PM CDT	Tornado Watch	SPC	Anderson, Austin, Bell, Bosque, Brazos, Burleson and 34 more	6 hr
May 23, 10:31 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Brooks, Cameron, Hidalgo, Jim Hogg, Jim Wells and 8 more	5 hr
May 23, 11:32 PM CDT	Mesoscale Discussion	SPC	Anderson, Atascosa, Austin, Bell, Brazos, Burleson and 36 more	88 min
May 23, 11:52 PM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 3 more	83 min
May 23, 11:59 PM CDT	Mesoscale Discussion	SPC	Bandera, Gillespie, Kendall, Kerr, Kinney, Real and 2 more	91 min
May 24, 3:16 AM CDT	Mesoscale Discussion	SPC	Collin, Fannin, Grayson	59 min
May 24, 12:05 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion	115 min
May 24, 12:34 PM CDT	Tornado Watch	SPC	Bowie, Cass, Morris	6 hr
May 24, 3:15 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Callahan, Childress, Coleman, Collingsworth and 26 more	90 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.