Alert archive / New Jersey / Coastal Flood Watches in 2018

Coastal Flood Watch 1, NWS Philadelphia/Mount Holly

February 28, 20187 counties in New Jersey; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this coastal flood watch at Feb 28, 2018, 3:43 PM EST for 7 counties in New Jersey; Kent County, Sussex County, Delaware. It took effect at Mar 2, 2018, 5:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 28, 2018, 3:43 PM EST (20:43 UTC)
In effect from: Mar 2, 2018, 5:00 AM EST
Expired: Mar 1, 2018, 4:07 PM EST
In force
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE, Atlantic County, NJ, Burlington County, NJ, Cape May County, NJ, Cumberland County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 20:42 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 12:00Z, 8.7 hours before the alert went out and 217 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: 1775 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 250 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 watch 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 watch went out at Feb 28, 11:34 AM EST, 4 hours 9 minutes earlier.

Area forecast discussion, Feb 28, 11:34 AM EST, 4 hours 9 minutes before

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Hazardous weather outlook, Feb 28, 3:45 AM EST, 11 hours 58 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
Feb 28, 3:12 PM EST	High Wind Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 9 more	24 hr
Feb 28, 3:33 PM EST	Winter Storm Watch	PHI	Sussex	24 hr
Feb 28, 3:36 PM EST	Gale Watch	PHI		12 hr
Feb 28, 3:36 PM EST	Storm Watch	PHI		12 hr
Feb 28, 3:45 PM EST	Flood Watch	PHI	Burlington, Camden, Hunterdon, Mercer, Middlesex, Monmouth and 4 more	45 hr

Nearby

Coastal Flood Watches in New Jersey, 2018 Coastal Flood Watches in Delaware, 2018 Every coastal flood watch 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.