Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 119

February 22, 201617 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 22, 2016, 6:24 PM CST for 17 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Feb 22, 2016, 6:24 PM CST (00:24 UTC)
Expired: Feb 22, 2016, 8:30 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Crane County, TX, Crockett County, TX, Edwards County, TX, Irion County, TX, Kimble County, TX, Kinney County, TX, Maverick County, TX, Pecos County, TX, Reagan County, TX, Real County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Upton County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 147 km from the middle of the area, began a volume at 00:21 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 18Feb 22, 10:10 PM CST

The nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 0.4 hours before the alert went out and 98 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 870 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Feb 22, 10:14 PM CST	Severe Thunderstorm Watch	SPC	Aransas, Atascosa, Bandera, Bastrop, Bee, Bexar and 40 more	8 hr
Feb 22, 11:46 PM CST	Mesoscale Discussion	SPC	Atascosa, Bandera, Bastrop, Bee, Bexar, Blanco and 31 more	89 min
Feb 23, 2:54 AM CST	Mesoscale Discussion	SPC	Aransas, Atascosa, Bee, Bexar, Brazoria, Calhoun and 19 more	96 min
Feb 23, 8:00 AM CST	Mesoscale Discussion	SPC	Chambers, Galveston, Jefferson, Orange	60 min
Feb 23, 12:11 PM CST	Mesoscale Discussion	SPC	Chambers, Hardin, Harris, Jasper, Jefferson, Liberty and 4 more	2 hr

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.