Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 122

February 23, 20164 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2016, 8:00 AM CST for 4 counties in Texas. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Feb 23, 2016, 8:00 AM CST (14:00 UTC)
Expired: Feb 23, 2016, 9:00 AM CST
In force: 60 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Chambers County, TX, Galveston County, TX, Jefferson County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 80 km from the middle of the area, began a volume at 14:04 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.0 hours before the alert went out and 81 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: 1 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 258 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, 6:24 PM CST	Mesoscale Discussion	SPC	Crane, Crockett, Edwards, Irion, Kimble, Kinney and 11 more	2 hr
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, 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.