Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 263

April 3, 201429 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 2:30 PM CDT for 29 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2014, 2:30 PM CDT (19:30 UTC)
Expired: Apr 3, 2014, 4:00 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 29 counties

Bandera County, TX, Bexar County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Comal County, TX, Concho County, TX, Edwards County, TX, Gillespie County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 108 km from the middle of the area, began a volume at 19:34 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

Del Rio, TX (KDLF), launched 12:00Z, 7.5 hours before the alert went out and 124 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: 1849 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 1593 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 142 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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, 6:42 AM CDT	Mesoscale Discussion	SPC	Camp, Collin, Cooke, Dallas, Delta, Denton and 26 more	93 min
Apr 3, 1:46 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Bowie, Camp, Cass and 43 more	89 min
Apr 3, 1:50 PM CDT	Tornado Watch	SPC	Anderson, Bell, Bosque, Bowie, Camp, Cass and 50 more	7 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.