Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 648

May 18, 2016Brooks County, Jim Hogg County, Zapata County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 18, 2016, 12:09 PM CDT for Brooks County, Jim Hogg County, Zapata County, Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 18, 2016, 12:09 PM CDT (17:09 UTC)
Expired: May 18, 2016, 1:45 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Brooks County, TX, Jim Hogg County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 148 km from the middle of the area, began a volume at 17:10 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

Corpus Christi, TX (KCRP), launched 12:00Z, 5.2 hours before the alert went out and 160 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: 580 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 385 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.7

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 17, 8:52 PM CDT	Mesoscale Discussion	SPC	Brooks, Duval, Hidalgo, Jim Hogg, Starr, Zapata	53 min
May 17, 9:33 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 13 more	87 min
May 17, 11:55 PM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Caldwell, Comal, Dimmit and 12 more	65 min
May 18, 2:49 PM CDT	Mesoscale Discussion	SPC	El Paso	2 hr
May 18, 5:43 PM CDT	Mesoscale Discussion	SPC	El Paso, Hudspeth, Presidio	62 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.