Alert archive / New York / Areal Flood Advisories in 2018

Areal Flood Advisory 21, NWS New York, NY

April 16, 2018Bronx County, Rockland County, New York; Bergen County, New Jersey

NWS New York, NY issued this areal flood advisory at Apr 16, 2018, 5:26 PM EDT for Bronx County, Rockland County, New York; Bergen County, New Jersey. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Apr 16, 2018, 5:26 PM EDT (21:26 UTC)
Expired: Apr 16, 2018, 8:15 PM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Bergen County, NJ, Bronx County, NY, Rockland County, NY

The radar

The Brookhaven radar (KOKX), 97 km from the middle of the area, began a volume at 21:26 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, 9.4 hours before the alert went out and 97 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: 7 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 391 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 902 m²/s²
0-3 km storm-relative helicity: 990 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New York, NY wrote its last area forecast discussion before this areal flood advisory went out at Apr 16, 4:49 PM EDT, 37 minutes earlier.

Area forecast discussion, Apr 16, 4:49 PM EDT, 37 minutes before

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Hazardous weather outlook, Apr 16, 4:16 PM EDT, 1 hour 10 minutes before

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In the hours before

Local storm report, Apr 16, 1:46 PM EDT, 3 hours 40 minutes before

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Local storm report, Apr 16, 2:05 PM EDT, 3 hours 21 minutes before

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Local storm report, Apr 16, 2:33 PM EDT, 2 hours 53 minutes before

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Local storm report, Apr 16, 2:34 PM EDT, 2 hours 52 minutes before

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Local storm report, Apr 16, 2:42 PM EDT, 2 hours 44 minutes before

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Local storm report, Apr 16, 2:51 PM EDT, 2 hours 35 minutes before

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The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 16, 6:26 AM EDT	Areal Flood Advisory	OKX	Bronx, Kings, New York, Orange, Queens, Richmond and 1 more	4 hr
Apr 16, 7:19 AM EDT	Flash Flood Warning	OKX	Bronx, Kings, New York, Orange, Queens, Richmond and 1 more	4 hr
Apr 16, 8:34 AM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	3 hr
Apr 16, 10:23 AM EDT	Special Weather Statement	OKX	Suffolk	37 min
Apr 16, 10:28 AM EDT	Areal Flood Advisory	OKX	Suffolk	3 hr
Apr 16, 11:21 AM EDT	Flash Flood Warning	OKX	Bronx, Kings, New York, Orange, Queens, Richmond and 2 more	3 hr
Apr 16, 11:55 AM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	2 hr
Apr 16, 1:47 PM EDT	Small Craft Advisory	OKX		54 hr
Apr 16, 2:13 PM EDT	Coastal Flood Statement	OKX	Nassau, Queens, Suffolk	12 hr
Apr 16, 2:20 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, New York, Orange, Queens, Richmond and 2 more	115 min
Apr 16, 11:25 AM EDT	River Flood Warning	OKX	Bergen	13 hr
Apr 16, 12:35 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	115 min

Nearby

Areal Flood Advisories in New York, 2018 Areal Flood Advisories in New Jersey, 2018 Every areal flood advisory 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.