Alert archive / Tennessee / Mesoscale Discussions in 2014

Mesoscale Discussion 286

April 4, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2014, 5:28 AM CDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2014, 5:28 AM CDT (10:28 UTC)
Expired
Apr 4, 2014, 7:00 AM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 67 counties

Bibb County, AL, Blount County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Catahoula Parish, LA, Concordia Parish, LA, Madison Parish, LA, Tensas Parish, LA, Claiborne County, MS, Hinds County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Lowndes County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Rankin County, MS, Scott County, MS, Warren County, MS, Winston County, MS, Bedford County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lincoln County, TN, Macon County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Overton County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Columbus AFB radar (KGWX), 12 km from the middle of the area, began a volume at 10:28 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

Birmingham, AL (KBMX), launched 00:00Z, 10.5 hours before the alert went out and 156 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, Birmingham, AL at 00:00Z on 2014-04-04Temperature 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, Birmingham, AL at 00:00Z on 2014-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
2046 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
243 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
Apr 4, 2:29 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 9 more31 min
Apr 4, 2:52 AM CDTTornado WatchSPCBlount, Colbert, Cullman, DeKalb, Fayette, Franklin and 17 more5 hr
Apr 4, 7:00 AM CDTMesoscale DiscussionSPCCalhoun, Cherokee, Chilton, Clay, Cleburne, Coosa and 4 more90 min
Apr 4, 10:12 AM CDTMesoscale DiscussionSPCSumter63 min
Apr 3, 8:44 PM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more31 min
Apr 3, 8:54 PM CDTTornado WatchSPCBienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 5 more7 hr
Apr 4, 12:20 AM CDTMesoscale DiscussionSPCCaldwell, Catahoula, East Carroll, Franklin, LaSalle, Madison and 5 more55 min
Apr 4, 12:40 AM CDTTornado WatchSPCCatahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more5 hr
Apr 4, 12:55 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Claiborne, De Soto, Jackson and 4 more95 min
Apr 4, 3:34 AM CDTSevere Thunderstorm WatchSPCAllen, Beauregard, Calcasieu, Caldwell, Cameron, De Soto and 9 more6 hr
Apr 4, 3:45 AM CDTMesoscale DiscussionSPCCaldwell, East Carroll, Franklin, Jackson, Madison, Morehouse and 4 more60 min
Apr 4, 5:04 AM CDTMesoscale DiscussionSPCAcadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia and 15 more116 min
Apr 4, 5:25 AM CDTSevere Thunderstorm WatchSPCAcadia, Ascension, Assumption, Avoyelles, Catahoula, Concordia and 30 more7 hr
Apr 4, 5:49 AM CDTMesoscale DiscussionSPCAllen, Beauregard, Calcasieu, Caldwell, De Soto, Franklin and 8 more56 min
Apr 4, 7:22 AM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 26 more83 min
Apr 3, 10:45 PM CDTMesoscale DiscussionSPCBenton, Bolivar, Calhoun, Carroll, Coahoma, DeSoto and 16 more60 min
Apr 3, 8:16 PM CDTMesoscale DiscussionSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 3 more59 min
Apr 3, 8:30 PM CDTTornado WatchSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 2 more7 hr
Apr 3, 11:40 PM CDTMesoscale DiscussionSPCCrockett, Dyer, Gibson, Henry, Lake, Lauderdale and 2 more95 min
Apr 4, 1:39 AM CDTMesoscale DiscussionSPCCheatham, Davidson, Dickson, Houston, Humphreys, Macon and 6 more3 hr
Apr 4, 2:12 AM CDTMesoscale DiscussionSPCDyer, Gibson, Henry, Obion, Stewart, Weakley63 min
Apr 4, 4:42 AM CDTMesoscale DiscussionSPCCampbell, Clay, Fentress, Jackson, Macon, Morgan and 7 more93 min
Apr 4, 4:58 AM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Campbell, Claiborne, Hamilton, Hancock and 8 more5 hr
Apr 4, 7:41 AM CDTMesoscale DiscussionSPCAnderson, Campbell, Claiborne, Meigs, Morgan, Rhea and 3 more49 min

Nearby

Mesoscale Discussions in Tennessee, 2014Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Mississippi, 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.