Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 798

May 8, 20065 states

The Storm Prediction Center issued this mesoscale discussion at May 8, 2006, 7:42 PM CDT for 5 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 8, 2006, 7:42 PM CDT (00:42 UTC)
Expired
May 8, 2006, 9:15 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 105 counties

Baldwin County, AL, Barbour County, AL, Bullock County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lowndes County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Holmes County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Livingston Parish, LA, Madison Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Vernon Parish, LA, Washington Parish, LA, Webster Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Hinds County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson County, MS, Newton County, TX

The radar

The Mobile radar (KMOB), 74 km from the middle of the area, began a volume at 00:42 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.7 hours before the alert went out and 141 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 2006-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2016 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 2006-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
2016 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.5

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
May 8, 7:56 PM CDTSevere Thunderstorm WatchSPCBaldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more5 hr
May 8, 10:00 PM CDTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
May 9, 9:47 AM CDTMesoscale DiscussionSPCBaldwin, Escambia, Mobile, Washington118 min
May 9, 10:26 AM CDTSevere Thunderstorm WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more7 hr
May 9, 12:29 PM CDTMesoscale DiscussionSPCLauderdale, Limestone, Madison91 min
May 9, 2:55 PM CDTMesoscale DiscussionSPCColbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 5 more2 hr
May 9, 3:57 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Butler, Chilton, Choctaw, Clarke and 15 more2 hr
May 9, 4:47 PM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Butler, Chilton, Choctaw and 28 more5 hr
May 9, 6:33 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Choctaw, Clarke and 20 more57 min
May 9, 3:37 AM CDTMesoscale DiscussionSPCCitrus, Hernando, Levy, Pasco113 min
May 9, 12:29 PM CDTSevere Thunderstorm WatchSPCAttala, Carroll, Choctaw, Clarke, Clay, Covington and 22 more8 hr
May 9, 1:33 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Clay and 22 more87 min
May 9, 3:45 PM CDTMesoscale DiscussionSPCCollin, Cooke, Delta, Denton, Fannin, Franklin and 5 more2 hr
May 9, 4:08 PM CDTMesoscale DiscussionSPCBandera, Blanco, Burnet, Comal, Edwards, Gillespie and 11 more97 min
May 9, 4:56 PM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Collingsworth, Deaf Smith, Donley and 15 more2 hr
May 9, 6:01 PM CDTSevere Thunderstorm WatchSPCArmstrong, Baylor, Briscoe, Carson, Childress, Collingsworth and 20 more7 hr
May 9, 6:30 PM CDTMesoscale DiscussionSPCLamar90 min
May 9, 6:30 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bell, Bexar, Blanco, Burnet and 27 more4 hr

Nearby

Mesoscale Discussions in Louisiana, 2006Mesoscale Discussions in Mississippi, 2006Mesoscale Discussions in Alabama, 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; radar from the NEXRAD Level II archive.