Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 791

May 24, 201323 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 24, 2013, 12:42 PM CDT for 23 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 24, 2013, 12:42 PM CDT (17:42 UTC)
Expired: May 24, 2013, 2:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 23 counties

Atascosa County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Goliad County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Jackson County, TX, Karnes County, TX, Lavaca 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), 67 km from the middle of the area, began a volume at 17:42 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 12:00Z, 5.7 hours before the alert went out and 169 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: 2472 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

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, 7:35 PM CDT	Mesoscale Discussion	SPC	Coke, Crane, Crockett, Ector, Glasscock, Howard and 13 more	85 min
May 23, 9:53 PM CDT	Mesoscale Discussion	SPC	Concho, Crockett, Irion, McCulloch, Menard, Midland and 6 more	67 min
May 23, 11:16 PM CDT	Mesoscale Discussion	SPC	Deaf Smith, Oldham, Parmer	89 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.