Alert archive / Tennessee / Mesoscale Discussions in 2004

Mesoscale Discussion 440

April 22, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2004, 11:25 PM CDT for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2004, 11:25 PM CDT (04:25 UTC)
Expired
Apr 23, 2004, 12:30 AM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 26 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Mississippi County, AR, Poinsett County, AR, Fulton County, KY, Hickman County, KY, Butler County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Crockett County, TN, Dyer County, TN, Fayette County, TN, Haywood County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton 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, 4.4 hours before the alert went out and 163 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 2004-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2009 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 2004-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
2009 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
2.5
Supercell composite
13.7

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
Apr 22, 7:10 PM CDTMesoscale DiscussionSPCBoone, Franklin, Howard, Johnson, Logan, Madison and 5 more35 min
Apr 22, 7:50 PM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more4 hr
Apr 22, 9:50 PM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more6 hr
Apr 22, 10:52 PM CDTMesoscale DiscussionSPCConway, Pope, Searcy, Stone, Van Buren53 min
Apr 22, 11:40 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more6 hr
Apr 23, 12:54 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more96 min
Apr 23, 3:12 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 5 more93 min
Apr 23, 7:33 AM CDTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Jackson, Lee, Poinsett and 2 more87 min
Apr 23, 10:37 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Fulton, Izard and 3 more113 min
Apr 23, 2:10 PM CDTSevere Thunderstorm WatchSPCBenton, Crawford, Sebastian, Washington6 hr
Apr 23, 6:01 PM CDTMesoscale DiscussionSPCCrawford, Scott, Sebastian59 min
Apr 23, 12:51 PM CDTMesoscale DiscussionSPCBarton, Bates, Benton, Camden, Cedar, Dade and 12 more114 min
Apr 23, 3:05 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Cedar, Dade, Greene, Hickory and 8 more5 hr
Apr 23, 11:09 AM CDTMesoscale DiscussionSPCBedford, Bledsoe, Cannon, Cheatham, Coffee, Cumberland and 34 more2 hr

Nearby

Mesoscale Discussions in Tennessee, 2004Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Arkansas, 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.