Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 1112

June 6, 20117 parishes in Louisiana; 24 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2011, 2:05 PM CDT for 7 parishes in Louisiana; 24 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2011, 2:05 PM CDT (19:05 UTC)
Expired: Jun 6, 2011, 3:00 PM CDT
In force: 55 min
Issued by: the Storm Prediction Center

All 31 counties

Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Vernon Parish, LA, Angelina County, TX, Austin County, TX, Brazos County, TX, Burleson County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX

The radar

The Lake Charles radar (KLCH), 112 km from the middle of the area, began a volume at 19:05 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 114 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: 3767 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 969 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 6, 5:09 PM CDT	Mesoscale Discussion	SPC	Acadia, Ascension, Assumption, Avoyelles, East Baton Rouge, East Feliciana and 21 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2011 Mesoscale Discussions in Louisiana, 2011 Every mesoscale discussion in 2011

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.