Alert archive / Texas / Mesoscale Discussions in 2013

Mesoscale Discussion 781

May 23, 201310 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 23, 2013, 12:22 PM CDT for 10 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 23, 2013, 12:22 PM CDT (17:22 UTC)
Expired: May 23, 2013, 2:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Brewster County, TX, Crane County, TX, Jeff Davis County, TX, Loving County, TX, Pecos County, TX, Presidio County, TX, Reeves County, TX, Terrell County, TX, Ward County, TX, Winkler County, TX

The radar

The Midland/Odessa radar (KMAF), 145 km from the middle of the area, began a volume at 17:26 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 watches that followed

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

Severe Thunderstorm Watch 214May 23, 2:05 PM CDT

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 5.4 hours before the alert went out and 145 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: 1598 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 1591 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 246 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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.

Issued	Product	Office	Counties	Lasted
May 23, 8:52 AM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Denton, Fannin, Grayson, Montague	53 min
May 23, 1:04 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Childress, Cottle, Crosby and 17 more	116 min
May 23, 1:38 PM CDT	Tornado Watch	SPC	Andrews, Armstrong, Bailey, Baylor, Borden, Briscoe and 54 more	8 hr
May 23, 2:03 PM CDT	Severe Thunderstorm Watch	SPC	Brewster, Brown, Coke, Coleman, Concho, Crane and 24 more	8 hr
May 23, 3:32 PM CDT	Mesoscale Discussion	SPC	Castro, Cottle, Crosby, Dickens, Fisher, Floyd and 10 more	88 min
May 23, 3:46 PM CDT	Mesoscale Discussion	SPC	Brewster, Crane, Culberson, Ector, Jeff Davis, Loving and 8 more	59 min
May 23, 6:10 PM CDT	Mesoscale Discussion	SPC	Armstrong, Borden, Briscoe, Callahan, Carson, Castro and 29 more	95 min

Nearby

Mesoscale Discussions in Texas, 2013 Every mesoscale discussion in 2013

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.