Alert archive / Louisiana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 251, NWS New Orleans, LA

May 11, 1995Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at May 11, 1995, 4:47 PM CDT for Saint Bernard Parish, Louisiana. It was in force for 28 min.

The area

The counties it named.

The facts

Issued: May 11, 1995, 4:47 PM CDT (21:47 UTC)
Expired: May 11, 1995, 5:15 PM CDT
In force: 28 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.8 hours before the alert went out and 43 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: 1596 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, May 11, 3:52 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORTS
NATIONAL WEATHER SERVICE NEW ORLEANS LA
352 PM CDT THU MAY  11 1995

TIME(CDT)  .....CITY LOCATION...... STATE ...EVENT/REMARKS...
           ....COUNTY LOCATION......

0\340 PM    GALLIANO                  LA   1.50 INCH DIAMETER HAIL
05/11/95   LAFOURCHE                      REPORTED BY THE GALLIANO
                                          EMERGENCY OPERATIONS CENTER.

Local storm report, May 11, 4:20 PM CDT, 27 minutes before

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Local storm report, May 11, 4:29 PM CDT, 18 minutes before

<!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>
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The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 2:25 PM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	65 min
May 11, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Plaquemines	67 min
May 11, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	Saint Bernard	67 min
May 11, 3:28 PM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	62 min
May 11, 3:36 PM CDT	Tornado Warning	LIX	Lafourche	54 min
May 11, 4:17 PM CDT	Tornado Warning	LIX	Plaquemines	58 min
May 11, 4:17 PM CDT	Tornado Warning	LIX	Jefferson	22 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1995 Every severe thunderstorm warning in 1995

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.