Alert archive / New Jersey / Coastal Flood Advisories in 2011

Coastal Flood Advisory 19, NWS Philadelphia/Mount Holly

May 17, 201110 counties in New Jersey; Delaware County, Philadelphia County, Pennsylvania; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood advisory at May 17, 2011, 3:57 PM EDT for 10 counties in New Jersey; Delaware County, Philadelphia County, Pennsylvania; 5 counties in Maryland. It took effect at May 17, 2011, 7:00 PM EDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: May 17, 2011, 3:57 PM EDT (19:57 UTC)
In effect from: May 17, 2011, 7:00 PM EDT
Expired: May 18, 2011, 10:00 AM EDT
In force: 15 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, 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, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 78 km from the middle of the area, began a volume at 19:59 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.0 hours before the alert went out and 79 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: 65 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 May 17, 11:10 AM EDT, 4 hours 47 minutes earlier.

Area forecast discussion, May 17, 11:10 AM EDT, 4 hours 47 minutes before

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Hazardous weather outlook, May 17, 9:49 AM EDT, 6 hours 8 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
May 16, 8:45 PM EDT	Coastal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	7 hr
May 17, 3:45 AM EDT	Coastal Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	12 hr
May 17, 5:10 AM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Ocean, Somerset	2 hr
May 17, 5:35 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Cumberland	3 hr

Nearby

Coastal Flood Advisories in New Jersey, 2011 Coastal Flood Advisories in Maryland, 2011 Coastal Flood Advisories in Pennsylvania, 2011 Every coastal flood advisory in 2011

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.