Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 288

April 4, 201418 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2014, 6:12 AM CDT for 18 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Apr 4, 2014, 6:12 AM CDT (11:12 UTC)
Expired: Apr 4, 2014, 8:45 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Bee County, TX, Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Nueces County, TX, San Patricio County, TX, Starr County, TX, Webb County, TX, Willacy County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 107 km from the middle of the area, began a volume at 11:14 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, 11.2 hours before the alert went out and 121 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: 3013 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 726 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: -49 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

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
Apr 3, 7:03 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Bowie, Camp, Cass and 49 more	57 min
Apr 3, 7:18 PM CDT	Mesoscale Discussion	SPC	Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 11 more	57 min
Apr 3, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Bandera, Bastrop, Blanco, Burnet, Caldwell, Comal and 9 more	2 hr
Apr 3, 8:44 PM CDT	Mesoscale Discussion	SPC	Anderson, Bowie, Camp, Cass, Cherokee, Collin and 32 more	31 min
Apr 3, 8:54 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Cherokee, Delta, Fannin and 22 more	7 hr
Apr 3, 11:52 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bee, Dimmit, Duval, Frio, Goliad and 12 more	8 hr
Apr 4, 12:55 AM CDT	Mesoscale Discussion	SPC	Gregg, Harrison, Henderson, Marion, Panola, Rusk and 4 more	95 min
Apr 4, 2:40 AM CDT	Mesoscale Discussion	SPC	Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 26 more	2 hr
Apr 4, 2:58 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bee, Dimmit, Frio, Karnes, La Salle and 3 more	92 min
Apr 4, 3:34 AM CDT	Severe Thunderstorm Watch	SPC	Angelina, Austin, Brazoria, Brazos, Burleson, Chambers and 24 more	6 hr
Apr 4, 5:49 AM CDT	Mesoscale Discussion	SPC	Angelina, Austin, Chambers, Hardin, Harris, Jasper and 17 more	56 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.