Alert archive / Tennessee / Mesoscale Discussions in 2003

Mesoscale Discussion 846

May 8, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 8, 2003, 9:55 AM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 8, 2003, 9:55 AM CDT (14:55 UTC)
Expired
May 8, 2003, 12:30 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 86 counties

Mississippi County, AR, Allen County, KY, Barren County, KY, Butler County, KY, Calloway County, KY, Christian County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, Monroe County, KY, Muhlenberg County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Dunklin County, MO, Pemiscot County, MO, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN

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 12:00Z, 2.9 hours before the alert went out and 120 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 12:00Z on 2003-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 360 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 12:00Z on 2003-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 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
360 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
628 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.3

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
May 8, 1:18 AM CDTMesoscale DiscussionSPCBenton, Garland, Grant, Hot Spring, Lincoln, Montgomery and 2 more3 hr
May 8, 1:55 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll5 hr
May 8, 5:02 AM CDTMesoscale DiscussionSPCCrawford, Franklin, Howard, Johnson, Logan, Madison and 8 more2 hr
May 8, 6:20 AM CDTTornado WatchSPCCrawford, Franklin, Logan, Montgomery, Scott, Sebastian and 1 more3 hr
May 8, 7:33 AM CDTMesoscale DiscussionSPCCrawford, Franklin, Johnson, Logan, Montgomery, Scott and 2 more87 min
May 8, 8:25 AM CDTTornado WatchSPCBaxter, Boone, Cleburne, Conway, Craighead, Crittenden and 18 more5 hr
May 8, 10:21 AM CDTMesoscale DiscussionSPCClay, Cleburne, Craighead, Greene, Independence, Izard and 8 more84 min
May 8, 10:25 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 3 more6 hr
May 8, 11:59 AM CDTMesoscale DiscussionSPCClay, Cleburne, Craighead, Greene, Independence, Izard and 8 more2 hr
May 8, 12:24 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Mississippi and 2 more2 hr
May 8, 5:31 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Johnson, Logan and 4 more59 min
May 8, 5:45 PM CDTTornado WatchSPCBenton, Crawford, Sebastian, Washington5 hr
May 8, 6:38 PM CDTMesoscale DiscussionSPCBenton, Crawford, Washington2 hr
May 8, 12:20 PM CDTSevere Thunderstorm WatchSPCDaviess, Hancock, Henderson, McLean, Union, Webster4 hr
May 8, 2:11 PM CDTMesoscale DiscussionSPCDaviess, Hancock, Henderson, McLean, Ohio, Union and 1 more2 hr
May 8, 2:20 PM CDTMesoscale DiscussionSPCBallard, Butler, Caldwell, Calloway, Christian, Graves and 12 more85 min
May 8, 5:15 PM CDTTornado WatchSPCAdair, Allen, Barren, Breckinridge, Bullitt, Butler and 41 more6 hr
May 8, 3:51 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Barry, Barton, Benton, Buchanan and 32 more3 hr
May 8, 4:15 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more7 hr
May 8, 7:50 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more85 min
May 8, 7:55 AM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 27 more95 min
May 8, 1:50 PM CDTTornado WatchSPCAtchison7 hr
May 8, 4:16 PM CDTMesoscale DiscussionSPCAndrew, Barton, Bates, Benton, Buchanan, Caldwell and 35 more29 min
May 8, 4:40 PM CDTTornado WatchSPCAndrew, Barton, Bates, Buchanan, Caldwell, Carroll and 24 more6 hr

Nearby

Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Missouri, 2003Every mesoscale discussion in 2003

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.