Alert archive / Tennessee / Mesoscale Discussions in 2003

Mesoscale Discussion 747

May 4, 20037 states

The Storm Prediction Center issued this mesoscale discussion at May 4, 2003, 9:26 PM CDT for 7 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 4, 2003, 9:26 PM CDT (02:26 UTC)
Expired
May 4, 2003, 11:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 80 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Lee County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Woodruff County, AR, Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Posey County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Scott County, MO, Benton County, MS, DeSoto County, MS, Marshall County, MS, Panola County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Shelby County, TN, Stewart County, TN, Tipton County, TN, Weakley 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, 2.4 hours before the alert went out and 113 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.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
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, 9:42 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, 4:18 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Independence and 14 more57 min
May 5, 4:55 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 9 more6 hr
May 5, 7:11 AM CDTMesoscale DiscussionSPCCrittenden, Cross, Lee, Mississippi, St. Francis2 hr
May 5, 9:56 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more2 hr
May 5, 10:38 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more3 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 5, 5:40 PM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Desha, Drew2 hr
May 4, 8:05 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 73 more85 min
May 4, 10:40 PM CDTTornado WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 14 more5 hr
May 4, 11:05 PM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 33 more5 hr
May 5, 1:30 AM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 16 more90 min
May 5, 1:46 AM CDTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Clinton, Coles and 25 more89 min
May 5, 3:41 AM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more34 min
May 5, 3:50 AM CDTTornado WatchSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more6 hr
May 5, 6:32 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more88 min
May 5, 9:19 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more56 min
May 5, 12:20 PM CDTTornado WatchSPCHardin7 hr
May 4, 11:37 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 5 more23 min
May 4, 11:45 PM CDTTornado WatchSPCClark, Crawford, Floyd, Harrison, Orange, Perry and 1 more5 hr
May 5, 2:31 AM CDTMesoscale DiscussionSPCCrawford, Floyd, Harrison89 min
May 5, 7:35 AM CDTTornado WatchSPCHarrison, Perry5 hr
May 5, 10:12 AM CDTMesoscale DiscussionSPCHarrison, Perry93 min
May 5, 11:59 AM CDTMesoscale DiscussionSPCHarrison, Perry61 min
May 5, 2:47 PM CDTMesoscale DiscussionSPCCrawford, Dubois, Floyd, Gibson, Harrison, Perry and 4 more118 min
May 5, 4:27 PM CDTMesoscale DiscussionSPCSteuben3 hr
May 5, 4:42 PM CDTMesoscale DiscussionSPCOhio3 hr
May 5, 6:33 PM CDTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 6 more57 min
May 5, 9:35 AM CDTTornado WatchSPCCalloway, Fulton5 hr
May 5, 11:06 AM CDTMesoscale DiscussionSPCFulton114 min
May 5, 2:13 PM CDTMesoscale DiscussionSPCFulton62 min
May 5, 2:35 PM CDTTornado WatchSPCFulton7 hr
May 5, 5:15 PM CDTTornado WatchSPCBracken, Campbell, Grant, Greenup, Kenton, Lewis and 4 more5 hr
May 5, 6:47 PM CDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Campbell, Carter and 15 more88 min
May 5, 9:05 AM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 32 more115 min
May 4, 9:05 PM CDTMesoscale DiscussionSPCBates, Benton, Boone, Caldwell, Carroll, Cass and 23 more85 min
May 5, 3:15 AM CDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 25 more6 hr
May 5, 6:07 AM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Bradley, Cumberland, Fentress, Grundy and 15 more83 min
May 5, 8:50 AM CDTTornado WatchSPCBledsoe, Blount, Bradley, Grundy, Hamilton, Loudon and 8 more6 hr
May 5, 12:52 PM CDTMesoscale DiscussionSPCBledsoe, Blount, Bradley, Hamilton, McMinn, Marion and 5 more113 min

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.