Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 388

April 23, 201416 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2014, 3:54 PM CDT for 16 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 23, 2014, 3:54 PM CDT (20:54 UTC)
Expired: Apr 23, 2014, 6:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Coke County, TX, Concho County, TX, Crockett County, TX, Edwards County, TX, Irion County, TX, Kimble County, TX, Kinney County, TX, Maverick County, TX, Menard County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Tom Green County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 90 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 138 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: 355 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 256 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 23, 2:37 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Childress, Collingsworth, Cottle and 14 more	113 min
Apr 23, 3:44 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Armstrong, Baylor, Briscoe, Callahan, Carson and 36 more	7 hr
Apr 23, 6:54 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Callahan, Childress, Clay, Collingsworth and 28 more	96 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.