Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 936

June 18, 202024 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2020, 8:01 PM CDT for 24 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2020, 8:01 PM CDT (01:01 UTC)
Expired: Jun 18, 2020, 10:00 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 5%

All 24 counties

Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Howard County, TX, Irion County, TX, Martin County, TX, McCulloch County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Sterling County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX

The radar

The San Angelo radar (KSJT), 45 km from the middle of the area, began a volume at 01:02 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

Midland Regional, TX (KMAF), launched 00:00Z, 1.0 hours before the alert went out and 133 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: 153 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 4177 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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 19, 3:18 PM CDT	Mesoscale Discussion	SPC	Bailey, Borden, Briscoe, Castro, Cochran, Cottle and 19 more	117 min
Jun 19, 4:07 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Archer, Armstrong, Bailey, Baylor, Borden and 56 more	9 hr
Jun 19, 6:15 PM CDT	Mesoscale Discussion	SPC	Armstrong, Baylor, Borden, Briscoe, Carson, Castro and 46 more	2 hr

Nearby

Mesoscale Discussions in Texas, 2020 Every mesoscale discussion in 2020

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.