Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS New Orleans, LA

August 24, 2021Lafourche Parish, Louisiana

NWS New Orleans, LA issued this special weather statement at Aug 24, 2021, 4:27 AM CDT for Lafourche Parish, Louisiana. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 24, 2021, 4:27 AM CDT (09:27 UTC)
Expired
Aug 24, 2021, 5:15 AM CDT
In force
48 min
Issued by
NWS New Orleans, LA
Hail
0.00 in
Wind
30

County Lafourche Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.5 hours before the alert went out and 273 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, Lake Charles Mun, LA at 00:00Z on 2021-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 990 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, Lake Charles Mun, LA at 00:00Z on 2021-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
990 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1431 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS New Orleans, LA wrote its last area forecast discussion before this special weather statement went out at Aug 23, 11:45 PM CDT, 4 hours 42 minutes earlier.

Area forecast discussion, Aug 23, 11:45 PM CDT, 4 hours 42 minutes before
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</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.
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      <p id="message2">
        Please try again in a few minutes.
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In the hours before

Special weather statement, Aug 24, 4:27 AM CDT, 0 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.
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 7:00 PM CDTSpecial Weather StatementLIXIberville30 min
Aug 23, 7:03 PM CDTSpecial Weather StatementLIXSaint Charles27 min
Aug 23, 7:13 PM CDTFlash Flood WarningLIXAscension, East Baton Rouge, Iberville57 min
Aug 23, 7:18 PM CDTSpecial Marine WarningLIX117 min
Aug 23, 7:28 PM CDTSpecial Weather StatementLIXJefferson47 min
Aug 23, 8:37 PM CDTSpecial Weather StatementLIXLafourche38 min
Aug 23, 9:08 PM CDTSpecial Marine WarningLIX97 min
Aug 23, 10:29 PM CDTSpecial Marine WarningLIX91 min
Aug 23, 11:56 PM CDTSpecial Marine WarningLIX94 min
Aug 24, 2:49 PM CDTSpecial Weather StatementLIXEast Feliciana26 min
Aug 24, 3:19 PM CDTSpecial Weather StatementLIXIberville26 min
Aug 24, 3:26 PM CDTSpecial Weather StatementLIXEast Feliciana49 min
Aug 24, 3:27 PM CDTSpecial Weather StatementLIXTerrebonne33 min
Aug 24, 3:41 PM CDTSpecial Weather StatementLIXEast Baton Rouge34 min
Aug 24, 4:05 PM CDTSpecial Weather StatementLIXPointe Coupee40 min
Aug 24, 4:07 PM CDTSpecial Weather StatementLIXIberville38 min
Aug 24, 4:07 PM CDTSpecial Weather StatementLIXTerrebonne38 min
Aug 24, 4:18 PM CDTSpecial Weather StatementLIXIberville27 min
Aug 24, 4:31 PM CDTSpecial Weather StatementLIXAssumption44 min
Aug 24, 4:51 PM CDTSpecial Weather StatementLIXLafourche39 min
Aug 24, 5:52 PM CDTSpecial Marine WarningLIX38 min
Aug 23, 7:33 PM CDTSpecial Weather StatementLIXHancock42 min
Aug 24, 5:36 PM CDTSpecial Weather StatementLIXHancock39 min

Nearby

Special Weather Statements in Louisiana, 2021Every special weather statement in 2021

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.