Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 2123

October 16, 20067 parishes in Louisiana; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 16, 2006, 7:51 AM CDT for 7 parishes in Louisiana; 6 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Oct 16, 2006, 7:51 AM CDT (12:51 UTC)
Expired
Oct 16, 2006, 9:15 AM CDT
In force
84 min
Issued by
the Storm Prediction Center

Counties De Soto Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Winn Parish, LA, Angelina County, TX, Nacogdoches County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 0.9 hours before the alert went out and 90 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2006-10-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2006-10-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 244 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
503 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
244 m²/s²
0-3 km storm-relative helicity
423 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Oct 15, 10:57 PM CDTMesoscale DiscussionSPCCalcasieu, Cameron63 min
Oct 15, 11:34 PM CDTTornado WatchSPCAcadia, Calcasieu, Cameron, Iberia, Jefferson Davis, Lafayette and 3 more7 hr
Oct 16, 1:26 AM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, Iberville, Jefferson, Lafourche and 11 more94 min
Oct 16, 2:13 AM CDTTornado WatchSPCAscension, Assumption, Iberville, Jefferson, Lafourche, Orleans and 6 more4 hr
Oct 16, 3:25 AM CDTMesoscale DiscussionSPCAcadia, Allen, Assumption, Beauregard, Calcasieu, Cameron and 12 more95 min
Oct 16, 5:32 AM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Beauregard, Calcasieu and 22 more88 min
Oct 16, 5:58 AM CDTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 32 more5 hr
Oct 16, 10:37 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Bienville, Calcasieu and 27 more9 hr
Oct 16, 12:39 PM CDTMesoscale DiscussionSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 30 more96 min
Oct 16, 1:56 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 13 more64 min
Oct 16, 2:24 PM CDTTornado WatchSPCAscension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 6 more3 hr
Oct 16, 3:37 PM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 33 more83 min
Oct 16, 5:07 PM CDTMesoscale DiscussionSPCSaint Bernard23 min
Oct 16, 5:39 PM CDTTornado WatchSPCAscension, Catahoula, Concordia, East Baton Rouge, East Carroll, East Feliciana and 12 more8 hr
Oct 16, 6:19 PM CDTMesoscale DiscussionSPCAcadia, Allen, Assumption, Avoyelles, Calcasieu, Cameron and 11 more26 min
Oct 16, 6:44 PM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 9 more7 hr
Oct 16, 3:50 AM CDTMesoscale DiscussionSPCBandera, Dimmit, Frio, Kinney, Maverick, Medina and 3 more85 min

Nearby

Mesoscale Discussions in Louisiana, 2006Mesoscale Discussions in Texas, 2006Every 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.