Alert archive / Tennessee / Mesoscale Discussions in 2005

Mesoscale Discussion 714

April 29, 2005Alcorn County, Benton County, Marshall County, Mississippi; Graham County, North Carolina; 59 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2005, 9:23 PM CDT for Alcorn County, Benton County, Marshall County, Mississippi; Graham County, North Carolina; 59 counties in Tennessee. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2005, 9:23 PM CDT (02:23 UTC)
Expired
Apr 29, 2005, 11:00 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 63 counties

Alcorn County, MS, Benton County, MS, Marshall County, MS, Graham County, NC, Anderson County, TN, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Blount County, TN, Campbell County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Humphreys County, TN, Jackson County, TN, Knox County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Loudon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, McNairy County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Perry County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Shelby County, TN, Smith County, TN, Union 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), 149 km from the middle of the area, began a volume at 02:25 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

Nashville Metro, TN (KBNA), launched 00:00Z, 2.4 hours before the alert went out and 139 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 2005-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 2005-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 287 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
60 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
873 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
287 m²/s²
0-3 km storm-relative helicity
406 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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 29, 8:53 PM CDTMesoscale DiscussionSPCAttala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 35 more97 min
Apr 29, 9:45 PM CDTTornado WatchSPCAdams, Alcorn, Attala, Benton, Calhoun, Carroll and 46 more7 hr
Apr 30, 1:08 AM CDTMesoscale DiscussionSPCAdams, Amite, Clarke, Copiah, Covington, Forrest and 20 more2 hr
Apr 30, 1:39 AM CDTMesoscale DiscussionSPCAdams, Alcorn, Attala, Calhoun, Carroll, Chickasaw and 45 more96 min
Apr 30, 2:40 AM CDTTornado WatchSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 25 more7 hr
Apr 30, 4:42 AM CDTMesoscale DiscussionSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 31 more93 min
Apr 30, 5:05 AM CDTTornado WatchSPCGeorge, Greene, Hancock, Harrison, Jackson, Stone7 hr
Apr 30, 6:41 AM CDTMesoscale DiscussionSPCGeorge, Greene, Hancock, Harrison, Jackson, Stone94 min
Apr 30, 11:02 AM CDTMesoscale DiscussionSPCGeorge, Hancock, Harrison, Jackson, Pearl River, Stone58 min
Apr 30, 2:25 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Marshall95 min
Apr 30, 1:08 AM CDTMesoscale DiscussionSPCGraham67 min
Apr 30, 8:19 AM CDTMesoscale DiscussionSPCAlamance, Anson, Bladen, Cabarrus, Caswell, Catawba and 43 more26 min
Apr 30, 8:40 AM CDTSevere Thunderstorm WatchSPCAlamance, Anson, Bladen, Cabarrus, Caswell, Chatham and 29 more6 hr
Apr 30, 10:25 AM CDTMesoscale DiscussionSPCAlamance, Anson, Bertie, Bladen, Chatham, Columbus and 29 more2 hr
Apr 30, 12:17 PM CDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Currituck, Edgecombe and 15 more118 min
Apr 30, 2:21 PM CDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Chowan, Columbus, Craven and 14 more54 min

Nearby

Mesoscale Discussions in Tennessee, 2005Mesoscale Discussions in Mississippi, 2005Mesoscale Discussions in North Carolina, 2005Every mesoscale discussion in 2005

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.