Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 619

May 12, 201615 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 12, 2016, 3:35 AM CDT for 15 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 12, 2016, 3:35 AM CDT (08:35 UTC)
Expired: May 12, 2016, 5:00 AM CDT
In force: 85 min
Issued by: the Storm Prediction Center

Counties Brown County, TX, Callahan County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Hamilton County, TX, Jones County, TX, Nolan County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX

The radar

The Dyess AFB radar (KDYX), 44 km from the middle of the area, began a volume at 08:33 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 00:00Z, 8.6 hours before the alert went out and 226 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: 2369 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1270 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.1

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 11, 7:11 PM CDT	Mesoscale Discussion	SPC	Callahan, Eastland, Erath, Fisher, Haskell, Hood and 13 more	94 min
May 11, 8:11 PM CDT	Mesoscale Discussion	SPC	Clay, Cooke, Grayson, Montague	3 hr
May 11, 9:52 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Eastland, Erath and 15 more	53 min
May 11, 10:13 PM CDT	Mesoscale Discussion	SPC	Armstrong, Childress, Collingsworth, Donley, Gray, Hall and 4 more	92 min
May 11, 10:55 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Callahan, Coke, Coleman, Fisher, Jones and 4 more	6 hr
May 12, 2:12 AM CDT	Mesoscale Discussion	SPC	Clay, Montague, Wichita	93 min

Nearby

Mesoscale Discussions in Texas, 2016 Every mesoscale discussion in 2016

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.