Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 373

March 29, 200715 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 29, 2007, 7:32 PM CDT for 15 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Mar 29, 2007, 7:32 PM CDT (00:32 UTC)
Expired: Mar 29, 2007, 9:00 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Anderson County, TX, Camp County, TX, Cherokee County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Henderson County, TX, Morris County, TX, Rains County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 00:32 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, 0.5 hours before the alert went out and 173 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: 378 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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
Mar 29, 10:01 PM CDT	Mesoscale Discussion	SPC	Anderson, Collin, Cooke, Dallas, Delta, Denton and 23 more	119 min
Mar 30, 4:44 AM CDT	Mesoscale Discussion	SPC	Andrews, Bandera, Crane, Crockett, Dimmit, Ector and 20 more	2 hr
Mar 30, 6:11 AM CDT	Severe Thunderstorm Watch	SPC	Andrews, Borden, Brown, Callahan, Coke, Coleman and 40 more	6 hr
Mar 30, 9:31 AM CDT	Mesoscale Discussion	SPC	Bandera, Bell, Bexar, Blanco, Bosque, Brown and 55 more	59 min
Mar 30, 9:51 AM CDT	Tornado Watch	SPC	Archer, Bell, Blanco, Bosque, Brown, Burnet and 48 more	8 hr
Mar 30, 11:47 AM CDT	Tornado Watch	SPC	Coke, Crockett, Edwards, Fisher, Irion, Jones and 12 more	6 hr
Mar 30, 12:00 PM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coleman, Comanche, Concho, Eastland and 20 more	2 hr
Mar 30, 2:58 PM CDT	Mesoscale Discussion	SPC	Coryell, McLennan	92 min
Mar 30, 3:31 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Clay, Coleman, Collin, Comanche and 34 more	89 min
Mar 30, 4:51 PM CDT	Mesoscale Discussion	SPC	Bandera, Bastrop, Bell, Blanco, Bosque, Brown and 67 more	54 min
Mar 30, 5:25 PM CDT	Tornado Watch	SPC	Anderson, Bandera, Bell, Bexar, Blanco, Bosque and 65 more	8 hr

Nearby

Mesoscale Discussions in Texas, 2007 Every mesoscale discussion in 2007

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.