Alert archive / New York / Coastal Flood Statements in 2023

Coastal Flood Statement 64, NWS New York, NY

October 31, 2023Nassau County, New York

NWS New York, NY issued this coastal flood statement at Oct 31, 2023, 4:31 AM EDT for Nassau County, New York. It took effect at Oct 31, 2023, 9:00 AM EDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Oct 31, 2023, 4:31 AM EDT (08:31 UTC)
In effect from
Oct 31, 2023, 9:00 AM EDT
Expired
Oct 31, 2023, 12:00 PM EDT
In force
3 hr
Issued by
NWS New York, NY

County Nassau County, NY

The radar

The Brookhaven radar (KOKX), 62 km from the middle of the area, began a volume at 08:34 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 00:00Z, 8.5 hours before the alert went out and 62 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2023-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2023-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -279 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
728 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
-279 m²/s²
0-3 km storm-relative helicity
-157 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 31, 3:28 AM EDTFreeze WatchOKXOrange12 hr
Oct 31, 3:30 PM EDTSmall Craft AdvisoryOKX35 hr
Oct 31, 3:37 PM EDTFreeze WatchOKXWestchester24 hr

Nearby

Coastal Flood Statements in New York, 2023Every coastal flood statement 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.