Alert archive / New Jersey / Areal Flood Advisories in 2018

Areal Flood Advisory 249, NWS Philadelphia/Mount Holly

August 19, 2018Atlantic County, Burlington County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 19, 2018, 3:31 AM EDT for Atlantic County, Burlington County, Ocean County, New Jersey. It was in force for 101 min.

The area

The counties it named.

The facts

Issued: Aug 19, 2018, 3:31 AM EDT (07:31 UTC)
Expired: Aug 19, 2018, 5:12 AM EDT
In force: 101 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 25 km from the middle of the area, began a volume at 07:30 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

Brookhaven, NY (KOKX), launched 00:00Z, 7.5 hours before the alert went out and 188 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: 240 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: 17 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 Aug 18, 11:50 PM EDT, 3 hours 41 minutes earlier.

Area forecast discussion, Aug 18, 11:50 PM EDT, 3 hours 41 minutes before

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Hazardous weather outlook, Aug 18, 11:36 PM EDT, 3 hours 55 minutes before

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In the hours before

Special weather statement, Aug 18, 9:49 PM EDT, 5 hours 42 minutes before

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  <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>
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      <p id="message2">
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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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The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 8:52 PM EDT	Special Weather Statement	PHI	Ocean	23 min
Aug 18, 9:07 PM EDT	Special Marine Warning	PHI		83 min
Aug 18, 9:23 PM EDT	Special Marine Warning	PHI		97 min
Aug 19, 1:03 AM EDT	Areal Flood Advisory	PHI	Cape May	4 hr
Aug 19, 4:11 AM EDT	Areal Flood Warning	PHI	Ocean	4 hr
Aug 19, 10:00 AM EDT	Areal Flood Advisory	PHI	Chester, Delaware, Montgomery, Philadelphia	110 min
Aug 19, 2:05 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	8 hr
Aug 18, 9:49 PM EDT	Special Weather Statement	PHI	Kent	26 min
Aug 19, 1:11 AM EDT	Areal Flood Advisory	PHI	Kent, 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; radar from the NEXRAD Level II archive.