Alert archive / Louisiana / Flash Flood Warnings in 2024

Flash Flood Warning 17, NWS New Orleans, LA

January 24, 2024Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jan 24, 2024, 4:49 PM CST for Saint Tammany Parish, Louisiana. It was in force for 5 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: Jan 24, 2024, 4:49 PM CST (22:49 UTC)
Expired: Jan 24, 2024, 9:45 PM CST
In force: 5 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Emergency: Flash flood emergency
Damage threat: Catastrophic
Flood severity: None

County Saint Tammany Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.8 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: 102 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 328 m²/s²
0-3 km storm-relative helicity: 402 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

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 Jan 24, 3:54 PM CST, 55 minutes earlier.

Area forecast discussion, Jan 24, 3:54 PM CST, 55 minutes before

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In the hours before

Local storm report, Jan 24, 3:01 PM CST, 1 hour 48 minutes before

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Local storm report, Jan 24, 3:07 PM CST, 1 hour 42 minutes before

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Local storm report, Jan 24, 3:34 PM CST, 1 hour 15 minutes before

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      <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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        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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Local storm report, Jan 24, 3:45 PM CST, 1 hour 4 minutes before

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<body>
  <main class="wrap">
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      <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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Local storm report, Jan 24, 4:06 PM CST, 43 minutes before

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<body>
  <main class="wrap">
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      <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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Local storm report, Jan 24, 4:08 PM CST, 41 minutes before

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<head>
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  <title>Service Notice</title>
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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.
      </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>
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</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 23, 10:46 PM CST	Dense Fog Advisory	LIX	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 13 more	11 hr
Jan 24, 1:42 AM CST	Special Weather Statement	LIX	East Baton Rouge, West Baton Rouge	33 min
Jan 24, 2:17 AM CST	Special Weather Statement	LIX	East Feliciana, West Feliciana	28 min
Jan 24, 5:27 AM CST	Areal Flood Advisory	LIX	Pointe Coupee, West Feliciana	2 hr
Jan 24, 6:29 AM CST	Flash Flood Warning	LIX	Pointe Coupee, West Feliciana	5 hr
Jan 24, 8:44 AM CST	Flash Flood Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge, West Feliciana	3 hr
Jan 24, 10:16 AM CST	Areal Flood Advisory	LIX	East Baton Rouge, Iberville, Livingston, West Baton Rouge	3 hr
Jan 24, 10:31 AM CST	River Flood Warning	LIX	Saint Tammany	7 days
Jan 24, 10:35 AM CST	River Flood Warning	LIX	Saint Tammany	67 hr
Jan 24, 10:35 AM CST	River Flood Warning	LIX	Saint Tammany	44 hr
Jan 24, 10:37 AM CST	River Flood Warning	LIX	Washington	18 days
Jan 24, 10:37 AM CST	River Flood Warning	LIX	Saint Tammany	34 days
Jan 24, 10:42 AM CST	River Flood Warning	LIX	Tangipahoa	6 days
Jan 24, 10:46 AM CST	River Flood Warning	LIX	Saint Tammany	5 days
Jan 24, 11:28 AM CST	Special Marine Warning	LIX		32 min
Jan 24, 11:44 AM CST	Special Marine Warning	LIX		61 min
Jan 24, 11:59 AM CST	Special Weather Statement	LIX	Washington	46 min
Jan 24, 12:27 PM CST	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa, Washington	8 hr
Jan 24, 12:30 PM CST	Severe Thunderstorm Warning	LIX	Washington	32 min
Jan 24, 12:57 PM CST	Special Weather Statement	LIX	Washington	33 min
Jan 24, 1:01 PM CST	Flash Flood Warning	LIX	Ascension, Assumption, Lafourche, Livingston, Saint Charles, Saint James and 2 more	9 hr
Jan 24, 1:43 PM CST	Flash Flood Warning	LIX	Saint Tammany, Washington	5 hr
Jan 24, 3:53 PM CST	Flash Flood Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	99 min
Jan 24, 4:01 PM CST	Dense Fog Advisory	LIX	Ascension, Assumption, Jefferson, Livingston, Orleans, Plaquemines and 6 more	17 hr
Jan 24, 10:12 AM CST	Special Weather Statement	LIX	Pike	33 min
Jan 24, 10:37 AM CST	Flash Flood Warning	LIX	Amite, Pike, Walthall	3 hr
Jan 24, 10:42 AM CST	River Flood Warning	LIX	Pearl River	69 hr
Jan 24, 10:42 AM CST	River Flood Warning	LIX	Pearl River	47 hr
Jan 24, 10:44 AM CST	Special Weather Statement	LIX	Pike	46 min
Jan 24, 10:52 AM CST	Tornado Warning	LIX	Pike, Walthall	38 min
Jan 24, 1:32 PM CST	Special Weather Statement	LIX	Pearl River	43 min

Nearby

Flash Flood Warnings in Louisiana, 2024 Every flash flood warning in 2024

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.