Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 1064

May 29, 200520 parishes in Louisiana; Jasper County, Newton County, Orange County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2005, 10:53 PM CDT for 20 parishes in Louisiana; Jasper County, Newton County, Orange County, Texas. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued: May 29, 2005, 10:53 PM CDT (03:53 UTC)
Expired: May 29, 2005, 11:30 PM CDT
In force: 37 min
Issued by: the Storm Prediction Center

All 23 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Pointe Coupee Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Jasper County, TX, Newton County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 63 km from the middle of the area, began a volume at 03:53 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.9 hours before the alert went out and 62 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: 1553 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1148 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.1
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
May 29, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	Acadia, Allen, Calcasieu, Cameron, Evangeline, Iberia and 4 more	6 hr
May 30, 1:33 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Assumption, Beauregard, Calcasieu, Cameron and 12 more	87 min
May 30, 2:25 AM CDT	Severe Thunderstorm Watch	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	5 hr
May 30, 4:35 AM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 12 more	85 min
May 30, 6:17 AM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 12 more	58 min
May 30, 1:48 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 9 more	117 min
May 29, 7:45 PM CDT	Mesoscale Discussion	SPC	Anderson, Bell, Blanco, Burnet, Coryell, Falls and 9 more	90 min
May 29, 9:01 PM CDT	Mesoscale Discussion	SPC	Brooks, Hidalgo, Jim Hogg, Jim Wells, Kenedy, Kleberg and 4 more	89 min
May 29, 10:05 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bastrop, Bee, Bexar, Brazoria and 40 more	55 min
May 29, 11:08 PM CDT	Mesoscale Discussion	SPC	Brooks, Hidalgo, Jim Hogg, Kenedy, Kleberg, Nueces and 2 more	67 min
May 29, 11:25 PM CDT	Severe Thunderstorm Watch	SPC	Brooks, Cameron, Hidalgo, Kenedy, Willacy	6 hr
May 30, 1:55 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Kenedy, Willacy	95 min
May 30, 4:08 AM CDT	Mesoscale Discussion	SPC	Brooks, Cameron, Hidalgo, Kenedy, Willacy	67 min

Nearby

Mesoscale Discussions in Louisiana, 2005 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.