Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2284

September 30, 2004Lea County, New Mexico; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 30, 2004, 6:17 PM MDT for Lea County, New Mexico; 21 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Sep 30, 2004, 6:17 PM MDT (00:17 UTC)
Expired: Sep 30, 2004, 7:45 PM MDT
In force: 88 min
Issued by: the Storm Prediction Center

All 22 counties

Lea County, NM, Andrews County, TX, Armstrong County, TX, Borden County, TX, Carson County, TX, Castro County, TX, Crosby County, TX, Dawson County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Howard County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Potter County, TX, Randall County, TX, Swisher County, TX, Terry County, TX

The radar

The Lubbock radar (KLBB), 71 km from the middle of the area, began a volume at 00:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.3 hours before the alert went out and 213 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1185 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1035 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

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.

Issued	Product	Office	Counties	Lasted
Oct 1, 3:50 PM MDT	Mesoscale Discussion	SPC	Archer, Collin, Cooke, Dallas, Delta, Denton and 15 more	85 min

Nearby

Mesoscale Discussions in Texas, 2004 Mesoscale Discussions in New Mexico, 2004 Every 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; radar from the NEXRAD Level II archive.