Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 740

May 27, 201422 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 27, 2014, 8:45 PM CDT for 22 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: May 27, 2014, 8:45 PM CDT (01:45 UTC)
Expired: May 27, 2014, 9:45 PM CDT
In force: 60 min
Issued by: the Storm Prediction Center

All 22 counties

Atascosa County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Blanco County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Jim Wells County, TX, Karnes County, TX, Kendall County, TX, Live Oak County, TX, McMullen County, TX, Refugio County, TX, San Patricio County, TX, Travis County, TX, Victoria County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 83 km from the middle of the area, began a volume at 01:45 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, 1.8 hours before the alert went out and 152 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: 1431 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 3.8

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 27, 8:03 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Burnet, Coryell, Falls, Hamilton and 4 more	57 min
May 28, 2:50 AM CDT	Mesoscale Discussion	SPC	Chambers, Galveston, Harris	85 min
May 28, 2:20 PM CDT	Mesoscale Discussion	SPC	Cameron, Hidalgo, Starr, Willacy	115 min

Nearby

Mesoscale Discussions in Texas, 2014 Every mesoscale discussion in 2014

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.