Alert archive / Texas / Mesoscale Discussions in 2016

Mesoscale Discussion 222

March 17, 201612 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 17, 2016, 2:13 AM CDT for 12 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Mar 17, 2016, 2:13 AM CDT (07:13 UTC)
Expired: Mar 17, 2016, 4:45 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Collin County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Grayson County, TX, Jack County, TX, Johnson County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Tarrant County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 61 km from the middle of the area, began a volume at 07:13 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, 7.2 hours before the alert went out and 36 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2858 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 119 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
Mar 17, 5:57 AM CDT	Mesoscale Discussion	SPC	Collin, Cooke, Dallas, Delta, Denton, Ellis and 13 more	3 hr
Mar 17, 9:37 AM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Collin, Cooke, Dallas and 27 more	83 min
Mar 17, 1:19 PM CDT	Severe Thunderstorm Watch	SPC	Angelina, Cherokee, Jasper, Nacogdoches, Newton, Panola and 5 more	9 hr
Mar 17, 3:48 PM CDT	Mesoscale Discussion	SPC	Sabine	87 min
Mar 17, 6:22 PM CDT	Mesoscale Discussion	SPC	Harrison, Newton, Panola, Sabine, San Augustine, Shelby	53 min
Mar 17, 6:22 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bandera, Bastrop, Bexar, Brazos and 43 more	2 hr

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.