Alert archive / Tennessee / Mesoscale Discussions in 2003

Mesoscale Discussion 754

May 5, 20036 states

The Storm Prediction Center issued this mesoscale discussion at May 5, 2003, 4:18 AM CDT for 6 states. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
May 5, 2003, 4:18 AM CDT (09:18 UTC)
Expired
May 5, 2003, 5:15 AM CDT
In force
57 min
Issued by
the Storm Prediction Center
All 116 counties

Colbert County, AL, Lauderdale County, AL, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Randolph County, AR, Sharp County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Allen County, KY, Ballard County, KY, Barren County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Green County, KY, Hart County, KY, Hickman County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Stoddard County, MO, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Marshall County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Bedford County, TN, Benton 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, Gibson County, TN, Giles 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, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Warren County, TN, Wayne County, TN, Weakley 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

Little Rock, AR (KLZK), launched 00:00Z, 9.3 hours before the alert went out and 140 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, Little Rock, AR at 00:00Z on 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2245 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, Little Rock, AR at 00:00Z on 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 square meters per square second.1939587897117Sfc1 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
2245 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
658 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
313 m²/s²
Significant tornado parameter
4.4
Supercell composite
14.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

649 
ACUS11 KWNS 050918
SWOMCD
SPC MCD 050918 
KYZ000-TNZ000-ALZ000-MSZ000-ILZ000-MOZ000-ARZ000-051015-

MESOSCALE DISCUSSION 0754
NWS STORM PREDICTION CENTER NORMAN OK
0418 AM CDT MON MAY 05 2003

AREAS AFFECTED...NERN AR / SERN MO / WRN AND MIDDLE TN / NRN MS /
NRN AL...

CONCERNING...TORNADO WATCH 242...244...

VALID 050918Z - 051015Z

SEVERE / TORNADO THREAT CONTINUES ACROSS THE AREA.

OVERALL THREAT APPEARS TO BE DIMINISHING ACCORDING TO LATEST RADAR
IMAGERY.  HOWEVER...UNSTABLE AIRMASS AND STRONG DEEP-LAYER WIND
FIELD REMAINS OVER THIS REGION...SUGGESTING THE SEVERE POTENTIAL
WILL PERSIST FOR THE NEXT FEW HOURS.  ALL THREE OF THESE WATCHES --
242...243...AND 244 -- WILL BE REPLACED BY 05/10Z WITH A NEW TORNADO
WATCH FROM NERN AR / SERN MO EWD INTO NRN MS / NRN AL / MIDDLE TN. 
LITTLE OR NO NEW STORM DEVELOPMENT IS EXPECTED WEST OF ONGOING NERN
AR STORMS AS SHORT-WAVE RIDGING EVIDENT IN WV IMAGERY AS FAR E AS
SERN OK WILL CONTINUE MOVING EWD INTO AR.  


..GOSS.. 05/05/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LMK...OHX...HUN...PAH...MEG...LZK...SGF...

36579153 36879052 37228791 37368543 35468564 34618798
34249123 34919220

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 4:55 AM CDTTornado WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more6 hr
May 5, 6:07 AM CDTMesoscale DiscussionSPCDeKalb, Jackson, Marshall83 min
May 5, 6:15 AM CDTTornado WatchSPCDeKalb, Jackson, Marshall3 hr
May 5, 7:11 AM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more2 hr
May 5, 8:50 AM CDTTornado WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 13 more6 hr
May 5, 9:05 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Hale and 13 more115 min
May 5, 9:35 AM CDTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 10 more5 hr
May 5, 10:38 AM CDTMesoscale DiscussionSPCBibb, Blount, Colbert, Cullman, Fayette, Franklin and 15 more3 hr
May 5, 11:06 AM CDTMesoscale DiscussionSPCBibb, Colbert, Cullman, Fayette, Franklin, Greene and 12 more114 min
May 5, 12:52 PM CDTMesoscale DiscussionSPCBibb, Calhoun, Chambers, Cherokee, Chilton, Clay and 11 more113 min
May 5, 2:13 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 32 more62 min
May 5, 2:35 PM CDTTornado WatchSPCBibb, Blount, Colbert, Cullman, Fayette, Franklin and 15 more7 hr
May 5, 5:40 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 26 more2 hr
May 4, 7:19 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more86 min
May 4, 7:34 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 7 more116 min
May 4, 9:26 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 7 more2 hr
May 4, 9:42 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 29 more93 min
May 5, 12:50 AM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 34 more5 hr
May 5, 1:20 AM CDTTornado WatchSPCArkansas, Clay, Craighead, Crittenden, Cross, Greene and 7 more6 hr
May 5, 9:56 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more2 hr
May 5, 10:40 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 21 more5 hr
May 5, 1:05 PM CDTTornado WatchSPCCleburne, Conway, Craighead, Crawford, Crittenden, Cross and 21 more3 hr
May 5, 1:13 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 17 more2 hr
May 5, 3:25 PM CDTTornado WatchSPCArkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 62 more7 hr
May 5, 5:18 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleveland, Columbia and 24 more117 min
May 4, 10:40 PM CDTTornado WatchSPCCrittenden, Daviess, Henderson, Hopkins, McLean, Ohio and 2 more5 hr
May 4, 11:37 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 38 more23 min
May 4, 11:45 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 44 more5 hr
May 5, 1:30 AM CDTMesoscale DiscussionSPCCrittenden, Daviess, Henderson, Hopkins, McLean, Ohio and 2 more90 min
May 5, 2:31 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 55 more89 min
May 5, 3:41 AM CDTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 13 more34 min
May 5, 3:50 AM CDTTornado WatchSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more6 hr
May 5, 6:32 AM CDTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more88 min
May 5, 7:35 AM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bell and 69 more5 hr
May 5, 9:19 AM CDTMesoscale DiscussionSPCBallard, Caldwell, Carlisle, Crittenden, Graves, Henderson and 10 more56 min
May 5, 10:12 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bell, Boyle and 58 more93 min
May 5, 11:59 AM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bell, Boyle and 65 more61 min
May 5, 12:20 PM CDTTornado WatchSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 73 more7 hr
May 5, 2:47 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 68 more118 min
May 5, 4:42 PM CDTMesoscale DiscussionSPCBoone, Boyd, Bracken, Campbell, Carter, Fleming and 12 more3 hr
May 5, 5:15 PM CDTTornado WatchSPCBracken, Campbell, Grant, Greenup, Kenton, Lewis and 4 more5 hr
May 5, 6:33 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 69 more57 min
May 5, 6:47 PM CDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Campbell, Carter and 15 more88 min
May 4, 8:05 PM CDTMesoscale DiscussionSPCAudrain, Bollinger, Callaway, Cape Girardeau, Clark, Crawford and 27 more85 min
May 4, 9:05 PM CDTMesoscale DiscussionSPCBates, Benton, Boone, Caldwell, Carroll, Cass and 23 more85 min
May 4, 11:05 PM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 17 more5 hr
May 5, 1:46 AM CDTMesoscale DiscussionSPCCity of Saint Louis89 min
May 5, 3:15 AM CDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more6 hr

Nearby

Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Arkansas, 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.