Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 269

April 3, 201417 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 7:18 PM CDT for 17 counties in Texas. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2014, 7:18 PM CDT (00:18 UTC)
Expired: Apr 3, 2014, 8:15 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, Gillespie County, TX, Guadalupe County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Llano County, TX, Medina County, TX, Real County, TX, Travis County, TX, Williamson County, TX

The radar

The Austin/San Antonio radar (KEWX), 79 km from the middle of the area, began a volume at 00:22 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 54Apr 3, 7:35 PM CDT

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 0.3 hours before the alert went out and 231 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: 1322 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 2705 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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
Apr 3, 7:03 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Bowie, Camp, Cass and 49 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
Apr 4, 6:12 AM CDT	Mesoscale Discussion	SPC	Bee, Brooks, Cameron, Duval, Hidalgo, Jim Hogg and 12 more	3 hr

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.