Alert archive / New Jersey / Coastal Flood Advisories in 2020

Coastal Flood Advisory 10, NWS Philadelphia/Mount Holly

April 7, 202010 counties in New Jersey; Bucks County, Delaware County, Philadelphia County, Pennsylvania; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this coastal flood advisory at Apr 7, 2020, 9:30 PM EDT for 10 counties in New Jersey; Bucks County, Delaware County, Philadelphia County, Pennsylvania; Kent County, New Castle County, Sussex County, Delaware. It took effect at Apr 8, 2020, 7:00 PM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Apr 7, 2020, 9:30 PM EDT (01:30 UTC)
In effect from: Apr 8, 2020, 7:00 PM EDT
Expired: Apr 9, 2020, 6:00 AM EDT
In force: 11 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 01:32 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.5 hours before the alert went out and 199 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: 1245 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 118 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 coastal 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 coastal flood advisory went out at Apr 7, 7:44 PM EDT, 1 hour 46 minutes earlier.

Area forecast discussion, Apr 7, 7:44 PM EDT, 1 hour 46 minutes before

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Hazardous weather outlook, Apr 7, 3:41 PM EDT, 5 hours 49 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        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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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 2:30 AM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	30 min
Apr 8, 2:35 AM EDT	Special Weather Statement	PHI	Camden	25 min
Apr 8, 2:40 AM EDT	Special Weather Statement	PHI	Hunterdon	35 min
Apr 8, 2:51 AM EDT	Special Weather Statement	PHI	Cumberland	24 min
Apr 8, 2:58 AM EDT	Special Weather Statement	PHI	Burlington	32 min
Apr 8, 3:13 AM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Middlesex	32 min
Apr 8, 3:25 AM EDT	Special Weather Statement	PHI	Burlington, Ocean	35 min
Apr 8, 3:50 AM EDT	Gale Watch	PHI		24 hr
Apr 8, 4:21 AM EDT	Special Weather Statement	PHI	Cumberland	39 min
Apr 8, 4:52 AM EDT	Special Marine Warning	PHI		83 min
Apr 8, 4:56 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland	64 min
Apr 8, 3:24 PM EDT	Gale Warning	PHI		58 hr
Apr 8, 7:19 PM EDT	Wind Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	24 hr
Apr 8, 1:53 AM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Northampton	37 min
Apr 8, 1:55 AM EDT	Special Weather Statement	PHI	Chester, Delaware	50 min
Apr 8, 1:59 AM EDT	Special Weather Statement	PHI	Berks	46 min
Apr 7, 11:10 PM EDT	Special Weather Statement	PHI	Sussex	35 min
Apr 7, 11:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	27 min
Apr 8, 12:53 AM EDT	Special Weather Statement	PHI	Kent	52 min
Apr 8, 1:06 AM EDT	Special Weather Statement	PHI	New Castle	39 min

Nearby

Coastal Flood Advisories in New Jersey, 2020 Coastal Flood Advisories in Pennsylvania, 2020 Coastal Flood Advisories in Delaware, 2020 Every coastal flood advisory in 2020

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.