Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 99

February 2, 20064 states

The Storm Prediction Center issued this mesoscale discussion at Feb 2, 2006, 4:09 AM CST for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Feb 2, 2006, 4:09 AM CST (10:09 UTC)
Expired
Feb 2, 2006, 5:45 AM CST
In force
96 min
Issued by
the Storm Prediction Center

Counties Baldwin County, AL, Mobile County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.2 hours before the alert went out and 69 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, Slidell Radar S, LA at 00:00Z on 2006-02-02Temperature 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, Slidell Radar S, LA at 00:00Z on 2006-02-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
887 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
196 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.

IssuedProductOfficeCountiesLasted
Feb 2, 1:52 AM CSTMesoscale DiscussionSPCBaldwin, Mobile83 min
Feb 2, 2:10 AM CSTTornado WatchSPCBaldwin, Covington, Escambia, Mobile8 hr
Feb 2, 6:13 AM CSTMesoscale DiscussionSPCGeneva, Houston92 min
Feb 2, 10:41 AM CSTMesoscale DiscussionSPCFranklin, Gulf, Leon, Liberty, Wakulla2 hr
Feb 2, 3:08 PM CSTMesoscale DiscussionSPCColumbia, Dixie, Franklin, Gilchrist, Hamilton, Jefferson and 5 more112 min
Feb 2, 4:52 PM CSTTornado WatchSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more4 hr
Feb 2, 4:54 PM CSTMesoscale DiscussionSPCAlachua, Baker, Bradford, Clay, Columbia, Dixie and 15 more2 hr
Feb 1, 6:48 PM CSTMesoscale DiscussionSPCAcadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 10 more87 min
Feb 1, 8:15 PM CSTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Beauregard, Calcasieu and 13 more6 hr
Feb 1, 11:44 PM CSTMesoscale DiscussionSPCAcadia, Ascension, Assumption, East Baton Rouge, Iberia, Iberville and 13 more91 min
Feb 2, 3:05 AM CSTMesoscale DiscussionSPCBienville, Caldwell, Catahoula, East Carroll, Franklin, Grant and 16 more85 min

Nearby

Mesoscale Discussions in Louisiana, 2006Mesoscale Discussions in Mississippi, 2006Mesoscale Discussions in Florida, 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.