Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 541

May 9, 201412 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2014, 4:34 PM CDT for 12 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: May 9, 2014, 4:34 PM CDT (21:34 UTC)
Expired: May 9, 2014, 6:30 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Bee County, TX, Brooks County, TX, Duval County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kleberg County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, San Patricio County, TX, Webb County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 79 km from the middle of the area, began a volume at 21:35 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 136May 9, 5:00 PM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.6 hours before the alert went out and 96 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: 1727 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 456 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

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 8, 8:20 PM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Burnet, Comal, Falls, Gillespie and 8 more	55 min
May 8, 9:41 PM CDT	Mesoscale Discussion	SPC	Bell, Blanco, Burnet, Falls, Gillespie, Hays and 5 more	64 min
May 9, 9:46 AM CDT	Mesoscale Discussion	SPC	Bandera, Kerr, Kinney, Maverick, Medina, Real and 2 more	2 hr
May 9, 10:39 AM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more	6 hr
May 9, 2:00 PM CDT	Mesoscale Discussion	SPC	Anderson, Atascosa, Austin, Bandera, Bastrop, Bell and 45 more	90 min
May 9, 3:18 PM CDT	Mesoscale Discussion	SPC	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 14 more	117 min
May 9, 4:55 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 7 more	6 hr
May 9, 6:14 PM CDT	Mesoscale Discussion	SPC	Anderson, Bowie, Camp, Cass, Cherokee, Ellis and 18 more	61 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.