Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 1141

June 24, 201421 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2014, 4:35 PM CDT for 21 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 24, 2014, 4:35 PM CDT (21:35 UTC)
Expired: Jun 24, 2014, 7:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 21 counties

Anderson County, TX, Cherokee County, TX, Collin County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Gregg County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Navarro County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 77 km from the middle of the area, began a volume at 21:35 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.6 hours before the alert went out and 75 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: 852 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1060 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 91 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.

Issued	Product	Office	Counties	Lasted
Jun 23, 9:35 PM CDT	Mesoscale Discussion	SPC	Andrews, Crane, Culberson, Ector, Gaines, Glasscock and 10 more	115 min
Jun 24, 11:34 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Coleman, Comanche and 22 more	116 min
Jun 24, 2:06 PM CDT	Mesoscale Discussion	SPC	Dallam, Hartley, Moore, Oldham, Sherman	114 min
Jun 24, 3:11 PM CDT	Severe Thunderstorm Watch	SPC	Dallam, Hansford, Hartley, Hemphill, Hutchinson, Lipscomb and 4 more	8 hr
Jun 24, 5:38 PM CDT	Mesoscale Discussion	SPC	Hemphill, Lipscomb, Ochiltree, Wheeler	97 min

Nearby

Mesoscale Discussions in Texas, 2014 Every mesoscale discussion in 2014

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.