Alert archive / Louisiana / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 217, NWS New Orleans, LA

August 1, 2023Iberville Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 1, 2023, 7:20 PM CDT for Iberville Parish, Louisiana. It was in force for 40 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 1, 2023, 7:20 PM CDT (00:20 UTC)
Expired: Aug 1, 2023, 8:00 PM CDT
In force: 40 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Iberville Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.3 hours before the alert went out and 179 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: 1419 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 2088 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: -47 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 1, 6:27 PM CDT, 53 minutes earlier.

Area forecast discussion, Aug 1, 6:27 PM CDT, 53 minutes before

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In the hours before

Special weather statement, Aug 1, 6:42 PM CDT, 38 minutes before

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<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.

Issued	Product	Office	Counties	Lasted
Aug 2, 2:21 AM CDT	Heat Advisory	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	41 hr
Aug 2, 10:25 AM CDT	Special Weather Statement	LIX	Jefferson	50 min
Aug 2, 11:14 AM CDT	Special Weather Statement	LIX	Jefferson	46 min
Aug 2, 1:04 PM CDT	Special Weather Statement	LIX	Terrebonne	41 min
Aug 2, 2:31 PM CDT	Severe Thunderstorm Warning	LIX	Livingston, Tangipahoa	44 min
Aug 2, 2:36 PM CDT	Special Weather Statement	LIX	East Feliciana	39 min
Aug 2, 2:53 PM CDT	Special Marine Warning	LIX		67 min
Aug 2, 3:05 PM CDT	Special Marine Warning	LIX		40 min
Aug 2, 3:09 PM CDT	Special Weather Statement	LIX	Ascension	51 min
Aug 2, 3:20 PM CDT	Special Weather Statement	LIX	East Feliciana	40 min
Aug 2, 3:26 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, West Feliciana	49 min
Aug 2, 3:29 PM CDT	Special Weather Statement	LIX	Livingston	46 min
Aug 2, 3:52 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Livingston	38 min
Aug 2, 3:54 PM CDT	Special Weather Statement	LIX	Ascension, Saint James	51 min
Aug 2, 4:06 PM CDT	Special Weather Statement	LIX	West Baton Rouge	24 min
Aug 2, 4:13 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	32 min
Aug 2, 4:22 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, Iberville, Saint James	38 min
Aug 2, 4:43 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, West Baton Rouge	47 min
Aug 2, 4:48 PM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	117 min
Aug 2, 4:56 PM CDT	Special Weather Statement	LIX	Assumption	34 min
Aug 2, 5:28 PM CDT	Special Weather Statement	LIX	Assumption	32 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.