Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 651

May 19, 201616 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 19, 2016, 7:04 AM CDT for 16 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: May 19, 2016, 7:04 AM CDT (12:04 UTC)
Expired: May 19, 2016, 9:00 AM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Aransas County, TX, Atascosa County, TX, Bee County, TX, DeWitt County, TX, Dimmit County, TX, Frio County, TX, Goliad County, TX, Karnes County, TX, La Salle County, TX, Live Oak County, TX, McMullen County, TX, Refugio County, TX, San Patricio County, TX, Victoria County, TX, Wilson County, TX, Zavala County, TX

The radar

The Corpus Christi radar (KCRP), 123 km from the middle of the area, began a volume at 12:03 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 182May 19, 7:55 AM CDT

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 0.1 hours before the alert went out and 140 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: 2030 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 661 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 14.9

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 7:56 AM CDT	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bee, Calhoun, DeWitt, Duval and 14 more	7 hr
May 19, 10:13 AM CDT	Mesoscale Discussion	SPC	Aransas, Bee, Calhoun, Goliad, Jackson, Jim Wells and 6 more	92 min
May 19, 11:35 AM CDT	Mesoscale Discussion	SPC	Aransas, Brazoria, Calhoun, Fort Bend, Galveston, Jackson and 4 more	85 min
May 19, 3:47 PM CDT	Mesoscale Discussion	SPC	Cameron, Hidalgo, Kenedy, Willacy	88 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.