Alert archive / Mississippi / Mesoscale Discussions in 2006

Mesoscale Discussion 464

April 7, 20066 states

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2006, 10:16 PM CDT for 6 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Apr 7, 2006, 10:16 PM CDT (03:16 UTC)
Expired
Apr 7, 2006, 11:45 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 111 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Coosa County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lamar County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Ashley County, AR, Chicot County, AR, Dade County, GA, Avoyelles Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Wilkinson County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Franklin County, TN, Grundy County, TN, Lincoln County, TN, Marion County, TN, Sequatchie County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 120 km from the middle of the area, began a volume at 03:16 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 nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.3 hours before the alert went out and 121 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, Jackson, MS at 00:00Z on 2006-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 824 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jackson, MS at 00:00Z on 2006-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 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
824 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1726 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
287 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.1

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
Apr 7, 7:28 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 37 more9 hr
Apr 7, 11:05 PM CDTMesoscale DiscussionSPCLauderdale115 min
Apr 8, 2:30 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Bullock, Butler, Calhoun and 33 more90 min
Apr 8, 6:42 AM CDTMesoscale DiscussionSPCRussell93 min
Apr 8, 8:37 AM CDTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 2 more113 min
Apr 8, 9:00 AM CDTTornado WatchSPCBarbour, Coffee, Covington, Crenshaw, Dale, Escambia and 4 more7 hr
Apr 8, 2:00 PM CDTMesoscale DiscussionSPCGeneva, Henry, Houston2 hr
Apr 7, 10:55 PM CDTMesoscale DiscussionSPCAshley, Bradley, Columbia, Union95 min
Apr 7, 8:20 PM CDTTornado WatchSPCBanks, Bartow, Carroll, Catoosa, Chattooga, Cherokee and 25 more10 hr
Apr 8, 2:10 AM CDTTornado WatchSPCBaldwin, Barrow, Bibb, Butts, Chattahoochee, Clarke and 51 more6 hr
Apr 8, 2:45 AM CDTMesoscale DiscussionSPCBanks, Cherokee, Dawson, Forsyth, Franklin, Habersham and 8 more60 min
Apr 8, 11:00 AM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Brantley, Bryan, Camden and 17 more2 hr
Apr 8, 12:30 PM CDTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 27 more8 hr
Apr 8, 3:22 PM CDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Brantley, Bryan, Camden and 13 more113 min
Apr 8, 3:45 PM CDTTornado WatchSPCBrooks, Decatur, Grady, Seminole, Thomas4 hr
Apr 8, 5:59 PM CDTMesoscale DiscussionSPCCamden, Charlton, Clinch, Echols, Lowndes, Ware91 min
Apr 7, 7:48 PM CDTTornado WatchSPCAlcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 5 more6 hr

Nearby

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