Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 2142

October 19, 200632 parishes in Louisiana; Amite County, Pike County, Wilkinson County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 19, 2006, 6:11 AM CDT for 32 parishes in Louisiana; Amite County, Pike County, Wilkinson County, Mississippi. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Oct 19, 2006, 6:11 AM CDT (11:11 UTC)
Expired: Oct 19, 2006, 7:45 AM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 35 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pike County, MS, Wilkinson County, MS

The radar

The Lake Charles radar (KLCH), 122 km from the middle of the area, began a volume at 11:11 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 837Oct 19, 6:35 AM CDT

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.2 hours before the alert went out and 120 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: 1015 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.3

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
Oct 18, 11:52 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 3 more	113 min
Oct 19, 3:03 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 21 more	117 min
Oct 19, 6:31 AM CDT	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 25 more	7 hr
Oct 19, 10:12 AM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, Iberia, Iberville, Jefferson and 14 more	2 hr
Oct 19, 12:08 PM CDT	Mesoscale Discussion	SPC	Orleans, Saint Bernard, Saint Charles, Saint John the Baptist, Saint Tammany	2 hr
Oct 19, 1:16 PM CDT	Mesoscale Discussion	SPC	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more	59 min
Oct 19, 1:17 PM CDT	Severe Thunderstorm Watch	SPC	George, Greene, Jackson	4 hr

Nearby

Mesoscale Discussions in Louisiana, 2006 Mesoscale Discussions in Mississippi, 2006 Every mesoscale discussion in 2006

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.