Alert archive / Louisiana / River Flood Warnings in 2026

River Flood Warning 33, NWS New Orleans, LA

May 9, 2026Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this river flood warning at May 9, 2026, 10:11 PM CDT for Saint Tammany Parish, Louisiana. It took effect at May 9, 2026, 11:04 PM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: May 9, 2026, 10:11 PM CDT (03:11 UTC)
In effect from: May 9, 2026, 11:04 PM CDT
Expired: May 10, 2026, 7:43 PM CDT
In force: 21 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: Minor

County Saint Tammany Parish, LA

The radar

The Hammond radar (KHDC), 45 km from the middle of the area, began a volume at 03:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Tchefuncte River near Folsom (FLSL1).

Action stage: 15 ft
Minor stage: 16 ft
Moderate stage: 17 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07375000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river 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 river flood warning went out at May 9, 6:45 PM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, May 9, 6:45 PM CDT, 3 hours 26 minutes before

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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.
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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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In the hours before

Local storm report, May 9, 9:22 PM CDT, 49 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
May 9, 7:37 PM CDT	River Flood Warning	LIX	Washington	26 hr
May 9, 8:11 PM CDT	River Flood Warning	LIX	Saint Helena	37 hr
May 9, 10:12 PM CDT	River Flood Warning	LIX	Tangipahoa	33 hr
May 10, 3:39 AM CDT	Dense Fog Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Saint Tammany, Tangipahoa and 2 more	5 hr
May 9, 7:39 PM CDT	River Flood Warning	LIX	Pearl River	37 hr
May 9, 7:44 PM CDT	River Flood Warning	LIX	Harrison	48 hr
May 9, 7:44 PM CDT	River Flood Warning	LIX	Harrison	19 hr

Nearby

River Flood Warnings in Louisiana, 2026 Every river flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.