Alert archive / Tennessee / Mesoscale Discussions in 2008

Mesoscale Discussion 552

April 4, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2008, 5:16 AM CDT for 4 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2008, 5:16 AM CDT (10:16 UTC)
Expired
Apr 4, 2008, 6:45 AM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 65 counties

Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Bell County, KY, Breathitt County, KY, Clay County, KY, Clinton County, KY, Elliott County, KY, Harlan County, KY, Jackson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Magoffin County, KY, McCreary County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Alcorn County, MS, Itawamba County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Bedford County, TN, Campbell County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardin County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Scott County, TN, Smith County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 117 km from the middle of the area, began a volume at 10:17 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

Nashville Metro, TN (KBNA), launched 00:00Z, 10.3 hours before the alert went out and 124 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, Nashville Metro, TN at 00:00Z on 2008-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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, Nashville Metro, TN at 00:00Z on 2008-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 304 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
17 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
304 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 4, 1:28 AM CDTMesoscale DiscussionSPCColbert, Lauderdale2 hr
Apr 4, 2:46 AM CDTSevere Thunderstorm WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone8 hr
Apr 4, 7:55 AM CDTMesoscale DiscussionSPCBlount, Colbert, Cullman, Fayette, Franklin, Greene and 16 more2 hr
Apr 4, 9:48 AM CDTTornado WatchSPCAutauga, Bibb, Blount, Chilton, Choctaw, Clarke and 18 more9 hr
Apr 4, 12:01 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Dallas, Greene and 5 more89 min
Apr 4, 12:33 PM CDTMesoscale DiscussionSPCChambers, Cleburne, Lee, Randolph87 min
Apr 4, 1:27 PM CDTTornado WatchSPCBarbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 14 more9 hr
Apr 4, 3:17 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 10 more88 min
Apr 4, 5:02 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 23 more88 min
Apr 4, 5:48 PM CDTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more6 hr
Apr 3, 9:49 PM CDTMesoscale DiscussionSPCBallard, Calloway, Carlisle, Fulton, Graves, Hickman and 2 more86 min
Apr 3, 11:19 PM CDTMesoscale DiscussionSPCBallard, Calloway, Carlisle, Fulton, Graves, Hickman and 2 more86 min
Apr 3, 10:23 PM CDTSevere Thunderstorm WatchSPCBenton, Coahoma, DeSoto, Marshall, Panola, Quitman and 3 more4 hr
Apr 4, 3:55 AM CDTSevere Thunderstorm WatchSPCBolivar, Grenada, Leflore, Sunflower, Washington7 hr

Nearby

Mesoscale Discussions in Tennessee, 2008Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Mississippi, 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; radar from the NEXRAD Level II archive.