Alert archive / Tennessee / Mesoscale Discussions in 2004

Mesoscale Discussion 2448

November 23, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Nov 23, 2004, 9:00 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Nov 23, 2004, 9:00 PM CST (03:00 UTC)
Expired
Nov 23, 2004, 11:00 PM CST
In force
2 hr
Issued by
the Storm Prediction Center
All 59 counties

Blount County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Walker County, AL, Winston County, AL, Dade County, GA, Alcorn County, MS, Itawamba County, MS, Prentiss County, MS, Tishomingo County, MS, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Moore County, TN, Perry County, TN, Rutherford County, TN, Sequatchie County, TN, Sumner County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Northeast Alabama radar (KHTX), 92 km from the middle of the area, began a volume at 03:03 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, 3.0 hours before the alert went out and 122 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 2004-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 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 2004-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
11 J/kg
Mixed-layer CIN
-140 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
66 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
Nov 23, 9:20 PM CSTTornado WatchSPCBlount, Colbert, Cullman, Etowah, Fayette, Franklin and 13 more7 hr
Nov 23, 11:16 PM CSTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Clarke, Cullman and 14 more119 min
Nov 24, 12:30 AM CSTMesoscale DiscussionSPCAutauga, Baldwin, Bibb, Chilton, Choctaw, Clarke and 12 more30 min
Nov 24, 12:45 AM CSTTornado WatchSPCBibb, Chilton, Choctaw, Clarke, Dallas, Greene and 7 more5 hr
Nov 24, 2:43 AM CSTMesoscale DiscussionSPCChoctaw, Clarke, Greene, Hale, Marengo, Pickens and 3 more62 min
Nov 24, 3:35 AM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Clay, Cleburne, Cullman and 11 more25 min
Nov 24, 3:55 AM CSTTornado WatchSPCBlount, Calhoun, Cherokee, Cleburne, Cullman, Etowah and 5 more5 hr
Nov 24, 4:57 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Clarke, Conecuh and 13 more63 min
Nov 24, 5:20 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Butler, Chambers, Chilton and 20 more6 hr
Nov 24, 7:11 AM CSTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Calhoun, Chambers and 24 more64 min
Nov 24, 7:25 AM CSTTornado WatchSPCBarbour, Chambers, Lee, Russell6 hr
Nov 24, 8:03 AM CSTMesoscale DiscussionSPCBarbour, Coffee, Covington, Dale, Geneva, Henry and 2 more57 min
Nov 24, 8:30 AM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston6 hr
Nov 24, 9:23 AM CSTMesoscale DiscussionSPCBarbour, Chambers, Lee, Russell97 min
Nov 24, 11:24 AM CSTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
Nov 24, 9:40 AM CSTTornado WatchSPCBaldwin, Bleckley, Bryan, Bulloch, Burke, Candler and 40 more6 hr
Nov 24, 1:13 PM CSTMesoscale DiscussionSPCBaldwin, Bleckley, Bryan, Bulloch, Burke, Candler and 40 more2 hr
Nov 24, 1:50 PM CSTTornado WatchSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 17 more4 hr
Nov 24, 3:30 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 14 more2 hr
Nov 24, 5:36 PM CSTMesoscale DiscussionSPCBrantley, Charlton24 min
Nov 23, 6:35 PM CSTTornado WatchSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 28 more7 hr
Nov 23, 7:53 PM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 13 more37 min
Nov 23, 8:15 PM CSTTornado WatchSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 15 more6 hr
Nov 23, 9:14 PM CSTMesoscale DiscussionSPCAdams, Claiborne, Franklin, Hinds, Humphreys, Issaquena and 5 more2 hr
Nov 23, 10:01 PM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Issaquena and 4 more119 min
Nov 24, 1:28 AM CSTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 14 more32 min
Nov 24, 1:45 AM CSTTornado WatchSPCAdams, Amite, Attala, Claiborne, Copiah, Franklin and 15 more4 hr
Nov 24, 2:50 AM CSTTornado WatchSPCHancock, Harrison, Jackson3 hr
Nov 24, 5:35 AM CSTMesoscale DiscussionSPCHancock, Harrison, Jackson25 min
Nov 24, 5:55 AM CSTTornado WatchSPCHarrison, Jackson2 hr
Nov 24, 10:16 AM CSTMesoscale DiscussionSPCAlcorn, Benton, Lafayette, Marshall, Prentiss, Tippah and 1 more2 hr
Nov 24, 11:30 AM CSTTornado WatchSPCBedford, Benton, Carroll, Cheatham, Davidson, Decatur and 22 more6 hr
Nov 24, 12:55 PM CSTMesoscale DiscussionSPCBedford, Benton, Cheatham, Clay, Davidson, Decatur and 29 more95 min
Nov 24, 2:56 PM CSTMesoscale DiscussionSPCBedford, Benton, Cannon, Cheatham, Coffee, Davidson and 28 more2 hr

Nearby

Mesoscale Discussions in Tennessee, 2004Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Mississippi, 2004Every mesoscale discussion in 2004

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.