Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 360

March 31, 201314 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2013, 7:27 PM CDT for 14 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2013, 7:27 PM CDT (00:27 UTC)
Expired: Mar 31, 2013, 9:00 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Dimmit County, TX, Duval County, TX, Frio County, TX, Jim Wells County, TX, Kinney County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Nueces County, TX, San Patricio County, TX, Webb County, TX, Zavala County, TX

The watches that followed

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

Severe Thunderstorm Watch 77Mar 31, 9:05 PM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 0.5 hours before the alert went out and 159 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: 1027 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
Mar 31, 9:06 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Hidalgo, Kenedy, Willacy	69 min
Mar 31, 9:47 PM CDT	Mesoscale Discussion	SPC	Brooks, Kleberg	28 min
Apr 1, 3:23 PM CDT	Mesoscale Discussion	SPC	Borden, Briscoe, Childress, Cottle, Crosby, Dickens and 16 more	67 min
Apr 1, 3:36 PM CDT	Severe Thunderstorm Watch	SPC	Armstrong, Borden, Briscoe, Childress, Collingsworth, Cottle and 19 more	5 hr
Apr 1, 5:27 PM CDT	Mesoscale Discussion	SPC	Baylor, Childress, Cottle, Dickens, Foard, Hall and 8 more	93 min
Apr 1, 6:44 PM CDT	Mesoscale Discussion	SPC	Pecos, Terrell	91 min

Nearby

Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.