Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 230

February 24, 200516 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2005, 7:04 AM CST for 16 counties in Texas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Feb 24, 2005, 7:04 AM CST (13:04 UTC)
Expired: Feb 24, 2005, 8:30 AM CST
In force: 86 min
Issued by: the Storm Prediction Center

Counties Bee County, TX, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, DeWitt County, TX, Fort Bend County, TX, Galveston County, TX, Harris County, TX, Jackson County, TX, Karnes County, TX, Lavaca County, TX, Live Oak County, TX, Matagorda County, TX, Refugio County, TX, Wharton County, TX, Wilson County, TX

The radar

The Houston radar (KHGX), 121 km from the middle of the area, began a volume at 13:07 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.1 hours before the alert went out and 316 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: 35 J/kg
Mixed-layer CIN: -322 J/kg
Mixed-layer LCL: 425 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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
Feb 23, 6:46 PM CST	Mesoscale Discussion	SPC	Andrews, Gaines, Yoakum	119 min
Feb 23, 7:36 PM CST	Mesoscale Discussion	SPC	Bandera, Bell, Blanco, Burnet, Caldwell, Comal and 26 more	84 min
Feb 23, 8:15 PM CST	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Edwards and 11 more	7 hr
Feb 23, 11:12 PM CST	Mesoscale Discussion	SPC	Brown, Coke, Coleman, Concho, Crockett, Irion and 13 more	2 hr
Feb 23, 11:37 PM CST	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 12 more	113 min
Feb 24, 1:47 AM CST	Mesoscale Discussion	SPC	Bandera, Bee, Blanco, Caldwell, DeWitt, Edwards and 19 more	88 min
Feb 24, 2:15 AM CST	Severe Thunderstorm Watch	SPC	Atascosa, Bee, Bexar, DeWitt, Goliad, Karnes and 6 more	6 hr
Feb 24, 4:12 AM CST	Mesoscale Discussion	SPC	Aransas, Atascosa, Bee, Brazoria, Calhoun, DeWitt and 11 more	93 min
Feb 24, 4:45 AM CST	Severe Thunderstorm Watch	SPC	Brazoria, Calhoun, Jackson, Matagorda, Wharton	5 hr

Nearby

Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.