Alert archive / New Jersey / Coastal Flood Advisories in 2020

Coastal Flood Advisory 34, NWS Philadelphia/Mount Holly

November 29, 2020Cape May County, Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this coastal flood advisory at Nov 29, 2020, 3:03 PM EST for Cape May County, Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Sussex County, Delaware. It took effect at Nov 30, 2020, 6:00 AM EST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Nov 29, 2020, 3:03 PM EST (20:03 UTC)
In effect from: Nov 30, 2020, 6:00 AM EST
Expired: Nov 30, 2020, 1:00 PM EST
In force: 7 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 20:02 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 12:00Z, 8.1 hours before the alert went out and 144 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: 2094 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 73 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 Nov 29, 9:22 AM EST, 5 hours 41 minutes earlier.

Area forecast discussion, Nov 29, 9:22 AM EST, 5 hours 41 minutes before

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Hazardous weather outlook, Nov 29, 5:03 AM EST, 10 hours before

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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
Nov 29, 2:41 AM EST	Gale Warning	PHI		42 hr
Nov 29, 3:06 PM EST	Wind Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 2 more	25 hr

Nearby

Coastal Flood Advisories in New Jersey, 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.