Alert archive / Louisiana / Areal Flood Warnings in 2016

Areal Flood Warning 13, NWS New Orleans, LA

August 14, 20167 parishes in Louisiana

NWS New Orleans, LA issued this areal flood warning at Aug 14, 2016, 4:00 PM CDT for 7 parishes in Louisiana. It was in force for 24 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: Aug 14, 2016, 4:00 PM CDT (21:00 UTC)
Expired: Aug 15, 2016, 4:00 PM CDT
In force: 24 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Ascension Parish, LA, East Baton Rouge Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint James Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.0 hours before the alert went out and 237 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1262 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 122 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 areal 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 areal flood warning went out at Aug 13, 4:24 PM CDT, 23 hours 36 minutes earlier.

Area forecast discussion, Aug 13, 4:24 PM CDT, 23 hours 36 minutes before

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Hazardous weather outlook, Aug 13, 5:15 PM CDT, 22 hours 45 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
Aug 13, 10:12 PM CDT	Areal Flood Warning	LIX	Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 3 more	18 hr
Aug 14, 12:50 PM CDT	Special Weather Statement	LIX	Terrebonne	25 min
Aug 14, 1:28 PM CDT	Special Weather Statement	LIX	Assumption	47 min
Aug 14, 1:41 PM CDT	Special Weather Statement	LIX	Ascension, East Baton Rouge, East Feliciana, Livingston, Saint Helena	2 hr
Aug 14, 4:29 PM CDT	Special Weather Statement	LIX	Jefferson	46 min
Aug 14, 5:24 PM CDT	Special Weather Statement	LIX	Saint Tammany	51 min
Aug 14, 6:16 PM CDT	Special Weather Statement	LIX	Saint Tammany	29 min

Nearby

Areal Flood Warnings in Louisiana, 2016 Every areal flood warning in 2016

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.