Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 2369

October 31, 20054 parishes in Louisiana; 22 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 31, 2005, 2:54 PM CST for 4 parishes in Louisiana; 22 counties in Texas. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Oct 31, 2005, 2:54 PM CST (20:54 UTC)
Expired
Oct 31, 2005, 4:00 PM CST
In force
66 min
Issued by
the Storm Prediction Center
All 26 counties

Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Vernon Parish, LA, Brazoria County, TX, Calhoun County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Jacinto County, TX, Tyler County, TX, Waller County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 20:57 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

Shreveport, LA (KSHV), launched 12:00Z, 8.9 hours before the alert went out and 271 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2005-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2005-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1173 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
169 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.

IssuedProductOfficeCountiesLasted
Oct 31, 1:35 PM CSTSevere Thunderstorm WatchSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more6 hr
Oct 31, 1:53 PM CSTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 12 more97 min
Oct 31, 3:10 PM CSTSevere Thunderstorm WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 8 more6 hr
Oct 31, 5:10 PM CSTMesoscale DiscussionSPCCaldwell, Grant, Jackson, LaSalle, Natchitoches, Ouachita and 2 more95 min
Oct 30, 11:48 PM CSTMesoscale DiscussionSPCHemphill, Lipscomb, Ochiltree, Roberts, Wheeler117 min
Oct 31, 10:55 AM CSTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Blanco, Brazos and 33 more65 min
Oct 31, 11:25 AM CSTSevere Thunderstorm WatchSPCAnderson, Angelina, Atascosa, Austin, Bastrop, Bell and 54 more7 hr
Oct 31, 5:26 PM CSTMesoscale DiscussionSPCBee, Brooks, Cameron, Duval, Hidalgo, Jim Hogg and 9 more94 min

Nearby

Mesoscale Discussions in Texas, 2005Mesoscale Discussions in Louisiana, 2005Every 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.