Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 262

March 25, 200914 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 25, 2009, 3:47 PM CDT for 14 counties in Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Mar 25, 2009, 3:47 PM CDT (20:47 UTC)
Expired: Mar 25, 2009, 5:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Coryell County, TX, Ellis County, TX, Falls County, TX, Freestone County, TX, Henderson County, TX, Hill County, TX, Kaufman County, TX, Lampasas County, TX, Limestone County, TX, McLennan County, TX, Navarro County, TX, Rains County, TX, San Saba County, TX, Van Zandt County, TX

The radar

The Ft Hood radar (KGRK), 104 km from the middle of the area, began a volume at 20:48 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, 8.8 hours before the alert went out and 137 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: 2348 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 24, 7:30 PM CDT	Mesoscale Discussion	SPC	Angelina, Nacogdoches, Sabine, San Augustine, Shelby	2 hr
Mar 24, 11:25 PM CDT	Tornado Watch	SPC	Jasper, Newton, Sabine, San Augustine, Tyler	5 hr
Mar 25, 10:55 AM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Blanco, Bosque, Brown, Burleson and 40 more	65 min
Mar 25, 11:27 AM CDT	Severe Thunderstorm Watch	SPC	Bell, Bosque, Brown, Callahan, Coke, Coleman and 47 more	7 hr
Mar 25, 12:51 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bandera, Bastrop, Bexar, Blanco and 48 more	114 min
Mar 25, 1:48 PM CDT	Mesoscale Discussion	SPC	Bosque, Brown, Callahan, Coleman, Collin, Comanche and 31 more	87 min
Mar 25, 2:06 PM CDT	Tornado Watch	SPC	Anderson, Bandera, Bastrop, Bexar, Blanco, Brazos and 36 more	7 hr
Mar 25, 2:42 PM CDT	Mesoscale Discussion	SPC	Bowie, Camp, Cass, Delta, Franklin, Gregg and 11 more	93 min
Mar 25, 3:57 PM CDT	Mesoscale Discussion	SPC	Bandera, Bastrop, Bexar, Blanco, Brazos, Burleson and 31 more	93 min
Mar 25, 5:29 PM CDT	Mesoscale Discussion	SPC	Angelina, Brazos, Burleson, Grimes, Houston, Jasper and 15 more	91 min
Mar 25, 5:40 PM CDT	Tornado Watch	SPC	Angelina, Cherokee, Gregg, Harrison, Jasper, Marion and 8 more	6 hr

Nearby

Mesoscale Discussions in Texas, 2009 Every mesoscale discussion in 2009

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.