Alert archive / Louisiana / Flash Flood Warnings in 2022

Flash Flood Warning 37, NWS New Orleans, LA

June 30, 20225 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Jun 30, 2022, 12:47 PM CDT for 5 parishes in Louisiana. It was in force for 78 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: Jun 30, 2022, 12:47 PM CDT (17:47 UTC)
Expired: Jun 30, 2022, 2:05 PM CDT
In force: 78 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.8 hours before the alert went out and 57 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: 1869 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 548 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 49 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 flash flood 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 flash flood warning went out at Jun 30, 10:49 AM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jun 30, 10:49 AM CDT, 1 hour 58 minutes before

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<body>
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    <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.
      </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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    </section>
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In the hours before

Special weather statement, Jun 30, 11:30 AM CDT, 1 hour 17 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>
</html>

Special weather statement, Jun 30, 12:33 PM CDT, 14 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>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 11:30 AM CDT	Special Weather Statement	LIX	Plaquemines	30 min
Jun 30, 12:33 PM CDT	Special Weather Statement	LIX	Orleans	27 min
Jun 30, 1:02 PM CDT	Special Weather Statement	LIX	Saint Tammany	28 min
Jun 30, 1:52 PM CDT	Special Weather Statement	LIX	Lafourche	23 min
Jun 30, 2:15 PM CDT	Flash Flood Warning	LIX	Lafourche, Saint Charles, Saint John the Baptist	82 min
Jun 30, 2:20 PM CDT	Special Weather Statement	LIX	Pointe Coupee	25 min
Jun 30, 2:53 PM CDT	Special Weather Statement	LIX	Saint John the Baptist	22 min
Jun 30, 2:56 PM CDT	Special Weather Statement	LIX	Saint Helena	49 min
Jun 30, 3:41 PM CDT	Flash Flood Warning	LIX	Livingston, Saint Helena, Tangipahoa	78 min
Jun 30, 2:55 AM CDT	Areal Flood Advisory	LIX	Hancock, Harrison, Pearl River	3 hr
Jun 30, 4:29 AM CDT	Flash Flood Warning	LIX	Harrison	3 hr
Jun 30, 2:42 PM CDT	Special Weather Statement	LIX	Wilkinson	33 min

Nearby

Flash Flood Warnings in Louisiana, 2022 Every flash flood warning in 2022

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.