Alert archive / Louisiana / Mesoscale Discussions in 2011

Mesoscale Discussion 1075

June 2, 201112 parishes in Louisiana; Adams County, Wilkinson County, Mississippi; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2011, 7:42 PM CDT for 12 parishes in Louisiana; Adams County, Wilkinson County, Mississippi; 7 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 2, 2011, 7:42 PM CDT (00:42 UTC)
Expired: Jun 2, 2011, 9:15 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

All 21 counties

Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Adams County, MS, Wilkinson County, MS, Angelina County, TX, Jasper County, TX, Newton County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, Tyler County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.7 hours before the alert went out and 107 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: 2573 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2295 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 39 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 3, 5:32 PM CDT	Mesoscale Discussion	SPC	Catahoula, Concordia, East Carroll, Franklin, Madison, Saint Helena and 2 more	118 min
Jun 3, 3:53 PM CDT	Mesoscale Discussion	SPC	Dallam, Hartley	67 min

Nearby

Mesoscale Discussions in Louisiana, 2011 Mesoscale Discussions in Texas, 2011 Mesoscale Discussions in Mississippi, 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.