Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 2371

November 11, 2008Beauregard Parish, Calcasieu Parish, Louisiana; 15 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Nov 11, 2008, 1:06 PM CST for Beauregard Parish, Calcasieu Parish, Louisiana; 15 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Nov 11, 2008, 1:06 PM CST (19:06 UTC)
Expired: Nov 11, 2008, 2:00 PM CST
In force: 54 min
Issued by: the Storm Prediction Center

Counties Beauregard Parish, LA, Calcasieu Parish, LA, Austin County, TX, Chambers County, TX, Fort Bend County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, San Jacinto County, TX, Tyler County, TX, Waller County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 58 km from the middle of the area, began a volume at 19:09 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, 7.1 hours before the alert went out and 177 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: 22 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 628 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 273 m²/s²
0-3 km storm-relative helicity: 400 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 11, 10:21 AM CST	Mesoscale Discussion	SPC	De Soto, Natchitoches, Sabine, Vernon	54 min
Nov 10, 6:15 PM CST	Mesoscale Discussion	SPC	Bastrop, Bell, Blanco, Bosque, Brown, Burnet and 28 more	90 min
Nov 10, 6:37 PM CST	Tornado Watch	SPC	Bosque, Brown, Coleman, Comanche, Coryell, Dallas and 15 more	7 hr
Nov 10, 10:33 PM CST	Mesoscale Discussion	SPC	Austin, Bastrop, Bell, Blanco, Bosque, Brazoria and 52 more	117 min
Nov 11, 1:23 AM CST	Mesoscale Discussion	SPC	Austin, Brazoria, Brazos, Burleson, Calhoun, Chambers and 24 more	97 min
Nov 11, 1:25 AM CST	Mesoscale Discussion	SPC	Brown, Burnet, Coke, Coleman, Concho, Coryell and 15 more	65 min

Nearby

Mesoscale Discussions in Texas, 2008 Mesoscale Discussions in Louisiana, 2008 Every mesoscale discussion in 2008

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.