Alert archive / Texas / Mesoscale Discussions in 2014

Mesoscale Discussion 433

April 27, 20149 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2014, 6:28 PM CDT for 9 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Apr 27, 2014, 6:28 PM CDT (23:28 UTC)
Expired: Apr 27, 2014, 8:00 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Bastrop County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Fayette County, TX, Lee County, TX, Milam County, TX, Robertson County, TX, Washington County, TX

The radar

The Ft Hood radar (KGRK), 64 km from the middle of the area, began a volume at 23:29 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, 11.5 hours before the alert went out and 291 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: 2370 J/kg
Mixed-layer CIN: -265 J/kg
Mixed-layer LCL: 662 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 453 m²/s²
0-3 km storm-relative helicity: 548 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
Apr 27, 5:09 AM CDT	Mesoscale Discussion	SPC	Clay, Wichita	96 min
Apr 27, 7:55 AM CDT	Mesoscale Discussion	SPC	Clay, Collin, Cooke, Dallas, Delta, Denton and 10 more	95 min
Apr 27, 9:03 AM CDT	Mesoscale Discussion	SPC	Anderson, Collin, Dallas, Delta, Ellis, Falls and 15 more	27 min
Apr 27, 9:16 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bell, Collin, Delta, Falls, Fannin and 16 more	6 hr
Apr 27, 11:27 AM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Bosque, Camp, Collin, Coryell and 27 more	93 min
Apr 27, 12:25 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion, Morris, Red River	2 hr
Apr 27, 1:46 PM CDT	Tornado Watch	SPC	Bowie, Camp, Cass, Franklin, Gregg, Harrison and 7 more	9 hr
Apr 27, 2:56 PM CDT	Severe Thunderstorm Watch	SPC	Delta, Ellis, Fannin, Henderson, Hopkins, Hunt and 6 more	5 hr
Apr 27, 4:52 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass, Marion, Morris, Red River, Titus	53 min
Apr 27, 5:14 PM CDT	Mesoscale Discussion	SPC	Delta, Falls, Freestone, Henderson, Hopkins, Hunt and 6 more	91 min
Apr 27, 6:11 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Franklin, Harrison, Marion and 4 more	64 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.