Alert archive / New York / Areal Flood Advisories in 2021

Areal Flood Advisory 99, NWS New York, NY

August 22, 2021Kings County, Nassau County, Queens County, New York

NWS New York, NY issued this areal flood advisory at Aug 22, 2021, 1:32 PM EDT for Kings County, Nassau County, Queens County, New York. It was in force for 118 min.

The area

The counties it named.

The facts

Issued: Aug 22, 2021, 1:32 PM EDT (17:32 UTC)
Expired: Aug 22, 2021, 3:30 PM EDT
In force: 118 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Kings County, NY, Nassau County, NY, Queens County, NY

The radar

The Brookhaven radar (KOKX), 81 km from the middle of the area, began a volume at 17:35 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, 5.5 hours before the alert went out and 81 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: 36 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 563 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Aug 22, 11:14 AM EDT, 2 hours 18 minutes earlier.

Area forecast discussion, Aug 22, 11:14 AM EDT, 2 hours 18 minutes before

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Hazardous weather outlook, Aug 22, 11:58 AM EDT, 1 hour 34 minutes before

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In the hours before

Local storm report, Aug 22, 12:39 PM EDT, 53 minutes before

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Local storm report, Aug 22, 12:45 PM EDT, 47 minutes before

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Local storm report, Aug 22, 12:53 PM EDT, 39 minutes before

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Local storm report, Aug 22, 12:58 PM EDT, 34 minutes before

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Local storm report, Aug 22, 1:15 PM EDT, 17 minutes before

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Local storm report, Aug 22, 1:18 PM EDT, 14 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
Aug 21, 8:46 PM EDT	Flash Flood Warning	OKX	Kings, Queens	5 hr
Aug 21, 9:03 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more	87 min
Aug 21, 10:18 PM EDT	Flash Flood Warning	OKX	New York	4 hr
Aug 21, 10:37 PM EDT	Areal Flood Advisory	OKX	Bronx, Nassau, New York, Queens, Westchester	83 min
Aug 21, 10:47 PM EDT	Flash Flood Warning	OKX	Bronx, Nassau, New York, Queens	103 min
Aug 22, 1:22 AM EDT	Flash Flood Warning	OKX	Richmond	117 min
Aug 22, 2:49 AM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens	86 min
Aug 22, 8:39 AM EDT	Areal Flood Advisory	OKX	Suffolk	4 hr
Aug 22, 2:44 PM EDT	Flash Flood Warning	OKX	Bronx, Kings, New York, Queens, Richmond, Rockland and 1 more	3 hr
Aug 22, 3:17 PM EDT	Flash Flood Warning	OKX	Kings, Nassau, Queens	2 hr
Aug 22, 4:32 PM EDT	Coastal Flood Statement	OKX	Nassau, Queens, Suffolk, Westchester	10 hr
Aug 22, 4:51 PM EDT	Flash Flood Warning Considerable damage threat	OKX	Bronx, New York, Orange, Rockland, Westchester	6 hr
Aug 22, 5:17 PM EDT	Small Craft Advisory	OKX		42 hr
Aug 22, 12:18 AM EDT	Flash Flood Warning	OKX	Essex, Passaic	2 hr
Aug 22, 4:11 AM EDT	River Flood Warning	OKX	Bergen	34 hr
Aug 22, 10:54 AM EDT	Flash Flood Warning	OKX	Southeastern Connecticut Planning Region	3 hr
Aug 22, 12:23 PM EDT	Flash Flood Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	4 hr

Nearby

Areal Flood Advisories in New York, 2021 Every areal flood advisory in 2021

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.