Alert archive / Tennessee / Mesoscale Discussions in 2005

Mesoscale Discussion 648

April 22, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2005, 5:36 AM CDT for 4 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2005, 5:36 AM CDT (10:36 UTC)
Expired
Apr 22, 2005, 7:00 AM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 67 counties

Colbert County, AL, Cullman County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Winston County, AL, Allen County, KY, Logan County, KY, Simpson County, KY, Todd County, KY, Alcorn County, MS, Itawamba County, MS, Lee County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union 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, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Perry County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale 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), 129 km from the middle of the area, began a volume at 10:36 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, 10.6 hours before the alert went out and 132 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 2005-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 255 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 2005-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939Sfc1 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
255 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1911 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
57 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 21, 9:23 PM CDTMesoscale DiscussionSPCBibb, Blount, Chilton, Colbert, Cullman, Fayette and 15 more97 min
Apr 22, 9:15 AM CDTMesoscale DiscussionSPCBibb, Chilton, Fayette, Greene, Hale, Jefferson and 4 more90 min
Apr 22, 9:50 AM CDTSevere Thunderstorm WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 24 more5 hr
Apr 22, 12:41 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chambers, Chilton, Clay, Coosa and 12 more64 min
Apr 22, 2:35 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Butler and 38 more6 hr
Apr 22, 2:49 PM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more86 min
Apr 22, 3:35 PM CDTSevere Thunderstorm WatchSPCColbert, DeKalb, Jackson, Lauderdale, Lawrence, Limestone and 2 more5 hr
Apr 22, 5:40 PM CDTSevere Thunderstorm WatchSPCCalhoun, Cherokee, Cleburne, DeKalb, Etowah, Jackson5 hr
Apr 22, 6:15 PM CDTSevere Thunderstorm WatchSPCBarbour, Coffee, Dale, Geneva, Henry, Houston and 1 more6 hr
Apr 22, 6:40 PM CDTMesoscale DiscussionSPCJackson, Madison95 min
Apr 21, 8:19 PM CDTMesoscale DiscussionSPCBallard, Carlisle, Fulton, Hickman, McCracken86 min
Apr 22, 3:09 AM CDTMesoscale DiscussionSPCBallard, Carlisle, Crittenden, Fulton, Graves, Hickman and 3 more66 min
Apr 22, 10:56 AM CDTMesoscale DiscussionSPCDaviess, Hancock, Henderson, McLean, Ohio, Union and 1 more94 min
Apr 22, 1:30 PM CDTSevere Thunderstorm WatchSPCAdair, Allen, Barren, Breckinridge, Bullitt, Butler and 34 more8 hr
Apr 22, 3:17 PM CDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyle, Bracken and 47 more88 min
Apr 22, 3:50 PM CDTSevere Thunderstorm WatchSPCAnderson, Bath, Bell, Boone, Bourbon, Boyd and 65 more7 hr
Apr 22, 5:11 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Boone and 81 more94 min
Apr 22, 11:06 AM CDTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Franklin, Hinds and 8 more114 min
Apr 22, 11:30 AM CDTSevere Thunderstorm WatchSPCAdams, Amite, Claiborne, Copiah, Covington, Franklin and 13 more8 hr
Apr 22, 2:25 PM CDTMesoscale DiscussionSPCAdams, Amite, Claiborne, Copiah, Covington, Franklin and 13 more95 min
Apr 22, 6:40 PM CDTSevere Thunderstorm WatchSPCAdams, Amite, Covington, Forrest, Franklin, Jefferson Davis and 10 more7 hr
Apr 22, 11:18 AM CDTMesoscale DiscussionSPCBlount, Sevier117 min
Apr 22, 5:17 PM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 23 more58 min

Nearby

Mesoscale Discussions in Tennessee, 2005Mesoscale Discussions in Alabama, 2005Mesoscale Discussions in Mississippi, 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.