Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 186

March 8, 201618 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 8, 2016, 10:46 AM CST for 18 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Mar 8, 2016, 10:46 AM CST (16:46 UTC)
Expired: Mar 8, 2016, 12:15 PM CST
In force: 89 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Angelina County, TX, Cherokee County, TX, Hardin County, TX, Houston County, TX, Jasper County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 149 km from the middle of the area, began a volume at 16:49 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.

Tornado Watch 38Mar 8, 12:40 PM CST

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.8 hours before the alert went out and 170 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: 554 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 311 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

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
Mar 7, 6:42 PM CST	Mesoscale Discussion	SPC	Bosque, Comanche, Cooke, Dallas, Denton, Ellis and 10 more	63 min
Mar 7, 11:41 PM CST	Mesoscale Discussion	SPC	Borden, Coke, Concho, Crane, Crockett, Dawson and 27 more	2 hr
Mar 8, 1:18 AM CST	Severe Thunderstorm Watch	SPC	Bosque, Brown, Callahan, Coke, Coleman, Collin and 48 more	10 hr
Mar 8, 3:36 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Cottle, Dickens and 6 more	84 min
Mar 8, 3:57 AM CST	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 36 more	2 hr
Mar 8, 7:06 AM CST	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Blanco, Bosque and 64 more	2 hr
Mar 8, 7:24 AM CST	Tornado Watch	SPC	Anderson, Bastrop, Bell, Blanco, Brazos, Burleson and 29 more	8 hr
Mar 8, 9:00 AM CST	Mesoscale Discussion	SPC	Anderson, Bastrop, Bell, Bosque, Burleson, Burnet and 35 more	90 min
Mar 8, 12:41 PM CST	Tornado Watch	SPC	Angelina, Austin, Bowie, Camp, Cass, Chambers and 34 more	5 hr
Mar 8, 1:10 PM CST	Mesoscale Discussion	SPC	Bell, Blanco, Bosque, Brown, Burnet, Coke and 32 more	95 min
Mar 8, 3:11 PM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Bowie, Cass, Chambers, Cherokee and 24 more	94 min
Mar 8, 5:52 PM CST	Mesoscale Discussion	SPC	Angelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more	83 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.