Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 2199

September 1, 20085 states

The Storm Prediction Center issued this mesoscale discussion at Sep 1, 2008, 6:28 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 1, 2008, 6:28 PM CDT (23:28 UTC)
Expired
Sep 1, 2008, 8:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 99 counties

Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Ashley County, AR, Chicot County, AR, Escambia County, FL, Santa Rosa County, FL, Ascension Parish, LA, Avoyelles Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Livingston Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Orleans Parish, LA, Ouachita Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Union Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Attala 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, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Wilkinson County, MS, Yazoo County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.5 hours before the alert went out and 30 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 12:00Z on 2008-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 196 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, Slidell Radar S, LA at 12:00Z on 2008-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 494 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
196 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
623 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
494 m²/s²
0-3 km storm-relative helicity
553 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.4

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
Aug 31, 7:47 PM CDTMesoscale DiscussionSPCBaldwin, Mobile88 min
Aug 31, 8:49 PM CDTTornado WatchSPCBaldwin, Mobile10 hr
Aug 31, 11:54 PM CDTMesoscale DiscussionSPCBaldwin, Mobile2 hr
Sep 1, 3:51 AM CDTMesoscale DiscussionSPCBaldwin, Mobile114 min
Sep 1, 6:30 AM CDTTornado WatchSPCBaldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more9 hr
Sep 1, 9:49 AM CDTMesoscale DiscussionSPCBaldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more86 min
Sep 1, 3:51 PM CDTTornado WatchSPCBaldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more8 hr

Nearby

Mesoscale Discussions in Mississippi, 2008Mesoscale Discussions in Louisiana, 2008Mesoscale Discussions in Alabama, 2008Every mesoscale discussion in 2008

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.