Alert archive / Louisiana / Flash Flood Warnings in 2026

Flash Flood Warning 30, NWS New Orleans, LA

May 9, 2026Jefferson Parish, Orleans Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 9, 2026, 11:49 AM CDT for Jefferson Parish, Orleans Parish, Louisiana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 9, 2026, 11:49 AM CDT (16:49 UTC)
Expired: May 9, 2026, 2:03 PM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Jefferson Parish, LA, Orleans Parish, LA

The radar

The Hammond radar (KHDC), 81 km from the middle of the area, began a volume at 16:49 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 nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.8 hours before the alert went out and 51 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: 1031 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 9.1

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 May 9, 7:08 AM CDT, 4 hours 41 minutes earlier.

Area forecast discussion, May 9, 7:08 AM CDT, 4 hours 41 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>

In the hours before

Local storm report, May 9, 9:23 AM CDT, 2 hours 26 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>

Local storm report, May 9, 9:54 AM CDT, 1 hour 55 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>

Local storm report, May 9, 10:32 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>

Local storm report, May 9, 10:38 AM CDT, 1 hour 11 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>

Local storm report, May 9, 11:18 AM CDT, 31 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>

Local storm report, May 9, 11:19 AM CDT, 30 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 8, 7:54 PM CDT	River Flood Warning	LIX	Saint Tammany	6 days
May 8, 8:03 PM CDT	River Flood Warning	LIX	Tangipahoa	5 days
May 8, 10:10 PM CDT	Special Weather Statement	LIX	Iberville	35 min
May 8, 10:41 PM CDT	Special Weather Statement	LIX	West Baton Rouge	34 min
May 8, 11:03 PM CDT	Special Weather Statement	LIX	Ascension	27 min
May 9, 12:52 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge	38 min
May 9, 1:28 AM CDT	Special Weather Statement	LIX	East Baton Rouge, West Baton Rouge	32 min
May 9, 1:39 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, Livingston, Pointe Coupee, West Baton Rouge	47 min
May 9, 3:58 AM CDT	Special Marine Warning	LIX		62 min
May 9, 3:59 AM CDT	Special Weather Statement	LIX	Orleans	31 min
May 9, 4:56 AM CDT	Special Marine Warning	LIX		64 min
May 9, 6:07 AM CDT	Special Weather Statement	LIX	East Baton Rouge, Saint Helena, Washington	53 min
May 9, 6:35 AM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	40 min
May 9, 6:38 AM CDT	Severe Thunderstorm Warning	LIX	Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington	52 min
May 9, 6:58 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	47 min
May 9, 7:02 AM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	118 min
May 9, 7:16 AM CDT	Special Marine Warning	LIX		89 min
May 9, 7:33 AM CDT	Special Weather Statement	LIX	Saint Tammany	42 min
May 9, 7:56 AM CDT	Special Marine Warning	LIX		64 min
May 9, 8:13 AM CDT	Flash Flood Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	2 hr
May 9, 9:00 AM CDT	Special Marine Warning	LIX		60 min
May 9, 9:07 AM CDT	River Flood Warning	LIX	Saint Tammany	48 hr
May 9, 9:07 AM CDT	River Flood Warning	LIX	Saint Tammany	29 hr
May 9, 9:21 AM CDT	Areal Flood Advisory	LIX	Ascension, Iberville, Livingston	3 hr
May 9, 11:14 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans	35 min
May 9, 11:52 AM CDT	River Flood Warning	LIX	Saint Tammany	3 days
May 9, 12:07 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	3 hr
May 9, 12:11 PM CDT	Flash Flood Warning	LIX	Assumption, Lafourche, Terrebonne	3 hr
May 9, 12:19 PM CDT	Areal Flood Advisory	LIX	Saint Charles	3 hr
May 9, 1:49 PM CDT	Areal Flood Advisory	LIX	Orleans, Saint Tammany	3 hr
May 9, 2:03 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans	102 min
May 9, 3:04 PM CDT	Areal Flood Advisory	LIX	Assumption, Lafourche, Terrebonne	82 min
May 9, 3:18 PM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	3 hr
May 9, 4:44 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, Iberville, Livingston, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more	91 min
May 8, 7:55 PM CDT	River Flood Warning	LIX	Pearl River	67 hr
May 8, 10:55 PM CDT	Special Weather Statement	LIX	Wilkinson	35 min
May 9, 1:01 AM CDT	Special Weather Statement	LIX	Hancock	29 min
May 9, 1:43 AM CDT	Special Weather Statement	LIX	Harrison	17 min
May 9, 4:36 AM CDT	Special Weather Statement	LIX	Amite	24 min
May 9, 4:40 AM CDT	Special Weather Statement	LIX	Amite	35 min
May 9, 5:16 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike, Walthall	44 min
May 9, 5:41 AM CDT	Flash Flood Warning	LIX	Amite, Pike, Walthall, Wilkinson	4 hr
May 9, 7:49 AM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison	41 min
May 9, 8:25 AM CDT	Special Weather Statement	LIX	Harrison, Jackson	50 min
May 9, 8:36 AM CDT	River Flood Warning	LIX	Pike, Walthall	20 hr
May 9, 9:07 AM CDT	Areal Flood Advisory	LIX	Harrison	113 min
May 9, 11:50 AM CDT	River Flood Warning	LIX	Pike	8 hr

Nearby

Flash Flood Warnings in Louisiana, 2026 Every flash 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.