Alert archive / Louisiana / Mesoscale Discussions in 2007

Mesoscale Discussion 287

March 14, 200710 parishes in Louisiana; Jefferson County, Orange County, Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2007, 6:17 PM CDT for 10 parishes in Louisiana; Jefferson County, Orange County, Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Mar 14, 2007, 6:17 PM CDT (23:17 UTC)
Expired
Mar 14, 2007, 7:45 PM CDT
In force
88 min
Issued by
the Storm Prediction Center

Counties Acadia Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Jefferson County, TX, Orange County, TX

The radar

The Lake Charles radar (KLCH), 86 km from the middle of the area, began a volume at 23:16 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.3 hours before the alert went out and 272 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, Slidell Radar S, LA at 12:00Z on 2007-03-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 499 joules per kilogram.LCLLFCEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2007-03-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 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
499 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
670 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
84 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
Mar 13, 9:35 PM CDTMesoscale DiscussionSPCAransas, Bee, Brazoria, Calhoun, Chambers, Goliad and 6 more115 min
Mar 13, 11:11 PM CDTMesoscale DiscussionSPCBrooks, Jim Hogg, Kenedy64 min
Mar 14, 9:52 AM CDTMesoscale DiscussionSPCAransas, Atascosa, Austin, Bastrop, Bee, Bell and 37 more113 min
Mar 14, 10:34 AM CDTSevere Thunderstorm WatchSPCAransas, Austin, Bee, Brazoria, Brazos, Burleson and 24 more8 hr
Mar 14, 1:05 PM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Bell, Brazoria, Brazos and 33 more85 min
Mar 14, 3:11 PM CDTMesoscale DiscussionSPCAransas, Austin, Bastrop, Bee, Brazoria, Caldwell and 25 more94 min
Mar 14, 6:46 PM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Calhoun, Colorado, DeWitt and 10 more59 min

Nearby

Mesoscale Discussions in Louisiana, 2007Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007

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.