Alert archive / Alabama / Mesoscale Discussions in 2014

Mesoscale Discussion 306

April 7, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2014, 12:50 AM CDT for 4 states. It was in force for 25 min.

The area

The outline as issued.

The facts

Issued
Apr 7, 2014, 12:50 AM CDT (05:50 UTC)
Expired
Apr 7, 2014, 1:15 AM CDT
In force
25 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 78 counties

Autauga County, AL, Baldwin County, AL, Bibb County, AL, Bullock County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Coffee County, AL, Conecuh County, AL, Coosa County, AL, Covington County, AL, Crenshaw County, AL, Dallas County, AL, Elmore County, AL, Escambia County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Ascension Parish, LA, Assumption Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 97 km from the middle of the area, began a volume at 05:52 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

Jackson, MS (KJAN), launched 00:00Z, 5.8 hours before the alert went out and 194 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 2014-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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 2014-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 686 square meters per square second.1939587897Sfc1 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
50 J/kg
Mixed-layer CIN
-316 J/kg
Mixed-layer LCL
458 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
686 m²/s²
0-3 km storm-relative helicity
870 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.8

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 6, 8:02 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Coosa, Dallas, Elmore and 14 more118 min
Apr 6, 10:10 PM CDTMesoscale DiscussionSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 8 more2 hr
Apr 6, 11:42 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Coosa, Dallas, Elmore and 10 more2 hr
Apr 7, 1:16 AM CDTTornado WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 37 more7 hr
Apr 7, 3:16 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Butler, Chilton, Choctaw and 25 more119 min
Apr 7, 5:42 AM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 40 more2 hr
Apr 7, 7:46 AM CDTTornado WatchSPCBaldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 12 more7 hr
Apr 7, 10:04 AM CDTMesoscale DiscussionSPCDale, Geneva, Henry, Houston116 min
Apr 7, 12:45 PM CDTMesoscale DiscussionSPCAlachua, Baker, Bradford, Columbia, Dixie, Duval and 10 more60 min
Apr 7, 1:02 PM CDTTornado WatchSPCHamilton, Suwannee7 hr
Apr 7, 2:00 PM CDTMesoscale DiscussionSPCDixie, Franklin, Gadsden, Gulf, Jefferson, Lafayette and 5 more60 min
Apr 7, 2:33 PM CDTTornado WatchSPCDixie, Franklin, Gadsden, Gulf, Jefferson, Lafayette and 5 more6 hr
Apr 6, 7:48 PM CDTMesoscale DiscussionSPCAcadia, Calcasieu, Cameron, Evangeline, Jefferson Davis, Lafayette and 2 more87 min
Apr 6, 10:40 PM CDTMesoscale DiscussionSPCAcadia, Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary and 1 more65 min
Apr 6, 11:49 PM CDTMesoscale DiscussionSPCAscension, East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena and 3 more86 min

Nearby

Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Mississippi, 2014Mesoscale Discussions in Louisiana, 2014Every mesoscale discussion in 2014

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.