Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 899

May 30, 201919 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2019, 1:10 PM CDT for 19 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 30, 2019, 1:10 PM CDT (18:10 UTC)
Expired: May 30, 2019, 3:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Concho County, TX, Crane County, TX, Crockett County, TX, Edwards County, TX, Glasscock County, TX, Irion County, TX, Kimble County, TX, Kinney County, TX, Menard County, TX, Midland County, TX, Pecos County, TX, Reagan County, TX, Schleicher County, TX, Sterling County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX

The radar

The San Angelo radar (KSJT), 127 km from the middle of the area, began a volume at 18:10 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.

Tornado Watch 298May 30, 2:45 PM CDT

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 6.2 hours before the alert went out and 121 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: 1553 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.7

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
May 30, 9:26 AM CDT	Mesoscale Discussion	SPC	Pecos, Ward	94 min
May 30, 1:40 PM CDT	Mesoscale Discussion	SPC	Dallam	3 hr
May 30, 2:26 PM CDT	Mesoscale Discussion	SPC	Brewster, Hudspeth, Jeff Davis, Presidio	2 hr
May 30, 2:43 PM CDT	Tornado Watch	SPC	Brewster, Crane, Crockett, Culberson, Hudspeth, Jeff Davis and 8 more	7 hr
May 30, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	Bandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 8 more	5 hr
May 30, 6:12 PM CDT	Mesoscale Discussion	SPC	Brewster, Culberson, Hudspeth, Jeff Davis, Loving, Pecos and 4 more	93 min

Nearby

Mesoscale Discussions in Texas, 2019 Every mesoscale discussion in 2019

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.