Alert archive / Louisiana / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 229, NWS New Orleans, LA

August 26, 2023Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 26, 2023, 6:25 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 26, 2023, 6:25 PM CDT (23:25 UTC)
Expired: Aug 26, 2023, 6:45 PM CDT
In force: 20 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.4 hours before the alert went out and 30 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: 2280 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1147 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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.

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 26, 3:51 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Aug 26, 3:51 PM CDT, 2 hours 34 minutes before

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In the hours before

Special weather statement, Aug 26, 3:44 PM CDT, 2 hours 41 minutes before

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Special weather statement, Aug 26, 4:30 PM CDT, 1 hour 55 minutes before

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Special weather statement, Aug 26, 4:53 PM CDT, 1 hour 32 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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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Aug 26, 6:11 PM CDT, 14 minutes before

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<head>
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  <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.
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      <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.

Issued	Product	Office	Counties	Lasted
Aug 26, 3:50 AM CDT	Excessive Heat Watch	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	10 hr
Aug 26, 2:19 PM CDT	Excessive Heat Warning	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	30 hr
Aug 26, 3:17 PM CDT	Red Flag Warning	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 9 more	29 hr
Aug 26, 3:44 PM CDT	Special Weather Statement	LIX	Livingston	31 min
Aug 26, 4:30 PM CDT	Special Weather Statement	LIX	Ascension	30 min
Aug 26, 4:53 PM CDT	Special Weather Statement	LIX	Saint Helena	37 min
Aug 26, 6:11 PM CDT	Special Weather Statement	LIX	Saint Tammany	34 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2023 Every severe thunderstorm warning in 2023

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.