Alert archive / New Jersey / Coastal Flood Warnings in 2023

Coastal Flood Warning 5, NWS Philadelphia/Mount Holly

December 17, 2023Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this coastal flood warning at Dec 17, 2023, 3:06 AM EST for Cumberland County, Salem County, New Jersey; Kent County, New Castle County, Delaware. It took effect at Dec 17, 2023, 9:00 AM EST. It was in force for 20 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: Dec 17, 2023, 3:06 AM EST (08:06 UTC)
In effect from: Dec 17, 2023, 9:00 AM EST
Expired: Dec 18, 2023, 5:22 AM EST
In force: 20 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 63 km from the middle of the area, began a volume at 08:08 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 8.1 hours before the alert went out and 179 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: 1950 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 130 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 warning 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 warning went out at Dec 16, 11:07 PM EST, 3 hours 59 minutes earlier.

Area forecast discussion, Dec 16, 11:07 PM EST, 3 hours 59 minutes before

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Hazardous weather outlook, Dec 16, 10:45 PM EST, 4 hours 21 minutes 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
Dec 16, 7:38 PM EST	Small Craft Advisory	PHI		22 hr
Dec 17, 9:19 AM EST	Dense Fog Advisory	PHI	Carbon, Monroe	7 hr

Nearby

Coastal Flood Warnings in New Jersey, 2023 Coastal Flood Warnings in Delaware, 2023 Every coastal flood warning in 2023

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.