Alert archive / New Jersey / Areal Flood Advisories in 2018

Areal Flood Advisory 274, NWS Philadelphia/Mount Holly

September 1, 2018Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood advisory at Sep 1, 2018, 4:05 PM EDT for Cape May County, New Jersey. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Sep 1, 2018, 4:05 PM EDT (20:05 UTC)
Expired: Sep 1, 2018, 7:05 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Cape May County, NJ

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 221 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: 881 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 101 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Sep 1, 3:58 PM EDT, 7 minutes earlier.

Area forecast discussion, Sep 1, 3:58 PM EDT, 7 minutes before

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Hazardous weather outlook, Sep 1, 3:48 AM EDT, 12 hours 17 minutes before

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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.
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      <p id="message2">
        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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In the hours before

Local storm report, Sep 1, 11:36 AM EDT, 4 hours 29 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 Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 1, 6:07 AM EDT	Special Marine Warning	PHI		53 min
Sep 1, 6:57 AM EDT	Special Marine Warning	PHI		63 min
Aug 31, 8:00 PM EDT	Areal Flood Warning	PHI	Berks, Chester	4 hr
Aug 31, 8:28 PM EDT	Areal Flood Warning	PHI	Sussex	3 hr
Aug 31, 8:55 PM EDT	Areal Flood Warning	PHI	New Castle	3 hr
Sep 1, 4:30 AM EDT	Areal Flood Advisory	PHI	Sussex	4 hr
Sep 1, 5:36 AM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Sep 1, 4:03 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr

Nearby

Areal Flood Advisories in New Jersey, 2018 Every areal flood advisory in 2018

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.