Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 628

May 10, 201311 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2013, 9:58 PM CDT for 11 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2013, 9:58 PM CDT (02:58 UTC)
Expired: May 11, 2013, 12:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Bee County, TX, Duval County, TX, Goliad County, TX, Jim Wells County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Webb County, TX

The radar

The Corpus Christi radar (KCRP), 95 km from the middle of the area, began a volume at 03:00 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, 3.0 hours before the alert went out and 113 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: 1588 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: -40 m²/s²
Significant tornado parameter: -0.3
Supercell composite: -1.8

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 10, 7:27 PM CDT	Severe Thunderstorm Watch	SPC	Aransas, Bee, Calhoun, Duval, Goliad, Jim Wells and 9 more	7 hr
May 10, 10:53 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Hidalgo, Jim Hogg, Starr, Zapata	5 hr
May 11, 2:07 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Kenedy, Willacy	83 min

Nearby

Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.