Alert archive / Louisiana / Mesoscale Discussions in 2004

Mesoscale Discussion 2392

November 1, 200422 parishes in Louisiana; 7 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Nov 1, 2004, 6:34 PM CST for 22 parishes in Louisiana; 7 counties in Mississippi. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Nov 1, 2004, 6:34 PM CST (00:34 UTC)
Expired: Nov 1, 2004, 8:30 PM CST
In force: 116 min
Issued by: the Storm Prediction Center

All 29 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Landry Parish, LA, Tensas Parish, LA, Vermilion Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Adams County, MS, Claiborne County, MS, Issaquena County, MS, Jefferson County, MS, Sharkey County, MS, Warren County, MS, Wilkinson County, MS

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.6 hours before the alert went out and 155 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: 1262 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.8

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
Nov 1, 9:37 PM CST	Mesoscale Discussion	SPC	Calcasieu, Cameron	3 hr
Nov 2, 3:30 AM CST	Mesoscale Discussion	SPC	Acadia, East Baton Rouge, East Feliciana, Iberville, Lafayette, Pointe Coupee and 4 more	2 hr
Nov 2, 9:52 AM CST	Mesoscale Discussion	SPC	Ascension, Assumption, Iberia, Iberville, Jefferson, Lafourche and 12 more	113 min

Nearby

Mesoscale Discussions in Louisiana, 2004 Mesoscale Discussions in Mississippi, 2004 Every mesoscale discussion in 2004

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.