Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 306

April 9, 20049 counties in Arkansas; 21 counties in Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2004, 3:32 PM CDT for 9 counties in Arkansas; 21 counties in Oklahoma; 6 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2004, 3:32 PM CDT (20:32 UTC)
Expired
Apr 9, 2004, 5:00 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 36 counties

Crawford County, AR, Franklin County, AR, Logan County, AR, Montgomery County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Collin County, TX, Cooke County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.5 hours before the alert went out and 194 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, Norman, OK at 12:00Z on 2004-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Norman, OK at 12:00Z on 2004-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 143 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1639 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
143 m²/s²
0-3 km storm-relative helicity
167 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.

<!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 9, 1:00 PM CDTMesoscale DiscussionSPCBenton, Washington3 hr
Apr 9, 4:00 PM CDTSevere Thunderstorm WatchSPCConway, Crawford, Franklin, Garland, Hot Spring, Johnson and 10 more5 hr
Apr 9, 1:51 PM CDTMesoscale DiscussionSPCAtoka, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more114 min
Apr 9, 2:15 PM CDTSevere Thunderstorm WatchSPCAtoka, Beckham, Blaine, Bryan, Caddo, Canadian and 27 more6 hr
Apr 9, 4:20 PM CDTMesoscale DiscussionSPCCimarron115 min
Apr 8, 7:19 PM CDTMesoscale DiscussionSPCBailey, Castro, Cochran, Gaines, Hockley, Lamb and 3 more26 min
Apr 8, 7:40 PM CDTSevere Thunderstorm WatchSPCCochran, Gaines, Hockley, Terry, Yoakum4 hr
Apr 8, 8:42 PM CDTMesoscale DiscussionSPCBriscoe, Cochran, Collingsworth, Crosby, Dawson, Dickens and 15 more63 min
Apr 8, 10:18 PM CDTMesoscale DiscussionSPCCrosby, Dickens, Floyd, Gaines, Garza, Hall and 7 more57 min
Apr 9, 5:49 PM CDTMesoscale DiscussionSPCBrown, Burnet, Callahan, Coleman, Comanche, Concho and 17 more86 min

Nearby

Mesoscale Discussions in Oklahoma, 2004Mesoscale Discussions in Arkansas, 2004Mesoscale Discussions in Texas, 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.