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Forecast Discussion for New York City/Upton, NY

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169
FXUS61 KOKX 261947
AFDOKX

Area Forecast Discussion
National Weather Service New York NY
347 PM EDT Sun Apr 26 2026

.WHAT HAS CHANGED...
Small Craft Advisories have been extended in time on the ocean
waters through the day Monday.

&&

.KEY MESSAGES...
1) Mostly dry with near normal temperatures through mid-week.


2) A widespread rainfall is expected Wednesday night into
Thursday, with a cooler pattern then in place through the
weekend.

&&

.DISCUSSION...
.KEY MESSAGE 1...
Offshore low pressure will slowly drift east tonight through
Monday, allowing high pressure to nose in from the north.

Under clear and nearly calm conditions, lows should drop into
upper 30s and lower 40s CWA wide. Some of the outlying areas
will drop to the lower to middle 30s and some patchy frost is
possible across the interior and Pine Barrens of Long Island,
especially the Lower Hudson Valley, where radiative cooling is
maximized. However, given the marginal possibility for frost, and
low areal coverage, frost advisories were not issued.

High pressure remains in control through the day Tuesday. A cold
front approaches, but runs into ridging aloft, so not looking
for too much in the way of rain Tuesday night, with just a
slight chance of showers across NE NJ, and the Lower Hudson
Valley. Better chances for precipitation Wednesday afternoon as
another frontal system and area of low pressure from the Mid-
West approaches.

With heights building aloft, warmer temperatures are expected,
but they are expected to be near normal, generally in the 60s.

.KEY MESSAGE 2...
Global dynamical and AI-based ensemble systems continue to advertise
anomalously low H5 heights over the East late this week, with
stubborn troughing thanks to strong blocking setting up between the
Canadian Maritimes and Greenland. The strength and placement of
these features will help drive the sensible weather locally through
the weekend.

Ahead of this, an advancing frontal system leads the incoming
trough, with shortwave energy rounding the trough helping to
instigate a surface wave of low pressure along the boundary. This
will bring a widespread rainfall as the system passes through
Wednesday night into Thursday morning, with potential for the rain
to linger later into the day. QPF looks to average between a half
inch and one inch through Thursday, with NBM V5 90th percentile
around 1.5 inches. Hydrological concerns appear minimal, and should
largely prove beneficial with NYC, NE NJ, and the LoHud Valley in
moderate drought.

Thereafter, still some uncertainty with additional chances for rain
into the weekend, but for now, increasing confidence in cooler than
normal conditions late this week into early next, with daytime highs
mid to late week largely in the 50s and low 60s, and chances for wet
weather at times, though a washout appears unlikely.

&&

.AVIATION /20Z SUNDAY THROUGH FRIDAY/...
High pressure builds in from the north through this evening,
and then remains over the region through Monday.

VFR.

Wind generally ENE, and briefly SE, 8-14kt. Winds back to NE
and N this evening and into the overnight, around 5kt, and even
become variable at a few locations. Monday morning a NE flow
develops, with winds possibly more east along the coast late
morning into the afternoon.


 ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...

A late day sea breeze, around 22Z, is possible at KJFK Monday.

Otherwise no unscheduled amendments expected.


.OUTLOOK FOR 18Z MONDAY THROUGH FRIDAY...

Monday afternoon - Tuesday. VFR.

Wednesday - Thursday: MVFR or lower with showers late day into
Thursday, tapering off late Thursday. Slight chance of thunder.
NW gusts 15-20kt Thursday.

Friday: Mainly VFR, MVFR possible with a slight chance of
showers. NW gusts 20-25kt.

Detailed information, including hourly TAF wind component forecasts,
can be found at: https:/www.weather.gov/zny/n90

&&

.MARINE...
Seas will remain elevated on the ocean waters into Tuesday with
a persistent NE flow and SCAs were extended through the day
Monday. SCAs may need to be extended in time with subsequent
forecasts.

Seas on the ocean may linger aoa 5 ft through at
least Thursday.

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...None.
NJ...None.
MARINE...Small Craft Advisory until 6 PM EDT Monday for ANZ350-353-355.

&&

$$

DISCUSSION...JP/DR
AVIATION...MET
MARINE...JP/DR

Previous Forecast Discussions may be found at
NWS New York City/Upton, NY (OKX) Office Forecast Discussions.
(Click 'Previous Version' there to view past versions successively.
Some may differ only in time posted.)

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