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Forecast Discussion for New York City/Upton, NY

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948
FXUS61 KOKX 210012
AFDOKX

Area Forecast Discussion
National Weather Service New York NY
812 PM EDT Wed May 20 2026

.WHAT HAS CHANGED...
With thunderstorms pushing east, the Severe Thunderstorm Watch
has been cancelled everywhere except Long Island and
southeastern CT.

The showers and thunderstorms have allowed temperatures to
decrease, allowing for the cancellation of the Heat Advisory.

&&

.KEY MESSAGES...
1) Unsettled with periods of showers expected for the upcoming
holiday weekend along with a much cooler airmass over the
region.

&&

.DISCUSSION...
.KEY MESSAGE 1...
The end of the week will remain dry and much
cooler. The dry period will be short-lived as unsettled weather
with periods of showers looks likely for the upcoming holiday
weekend. The frontal boundary that moves through today/Wednesday
will remain to our south with multiple disturbances/waves of
low pressure moving along it through the weekend. Moisture from
these systems will overrun high pressure to our north and east.

The main challenge for this period is timing when the most
widespread shower activity will occur. The highest probabilities
currently are from late Friday through early Sunday. However, there
is still some uncertainty, especially if the surface ridging from
the high is stronger. This would help suppress the showers a bit
further south, with at least the northern half of the region seeing
less rainfall. Chances for showers continue late Sunday into
Memorial Day as additional energy may pass to west or northwest.

Otherwise, will remain mostly cloudy through the weekend with
temperatures likely running below normal for late May in the low to
mid 60s. Nighttime temperatures should be in the 50s. The frontal
boundary may get pushed further south by next Tuesday, which could
help lower any chance for showers.

&&

.AVIATION /00Z THURSDAY THROUGH MONDAY/...
Showers and thunderstorms have pushed east of most terminals,
except for KISP and KGON. These are expected to push east of
these terminals by 9 pm or thereafter.

Mainly VFR conditions are expected through the TAF period,
except for a brief period Thursday morning into the afternoon in
association with showers moving through.

Winds will mainly be northerly near 10 kt. Winds become more NE
Thursday without much change in wind speed, then shift to the SE
by late afternoon.

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

Amendments expected due to changes in flight categories in
association with showers moving through. Widespread thunder has
generally ended, though isolated thunder is still possible
through 01Z.


.OUTLOOK FOR 00Z FRIDAY THROUGH MONDAY...

Thursday Night: Mainly VFR.

Friday: Possible showers and MVFR conditions late at night.

Saturday: MVFR or lower with showers. E-NE wind gusts 15-20 kt.

Sunday: MVFR or lower with showers. E-NE wind gusts 15-20 kt during
the day.

Monday: Chance of MVFR or lower with showers.

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

&&

.MARINE...
A Small Craft Advisory over ocean waters has been expired early.
Waves are below 5 ft. Its possible waves could return above 5 ft
with the front and any stronger showers or thunderstorms this
evening into early tonight. However, should this occur, it would
likely be too brief and local for a widespread SCA issuance.

Winds and waves will remain below SCA levels through Saturday
morning. Saturday morning into Sunday winds and waves may once again
reach SCA levels, while waves on ocean waters could remain elevated
into the start of next week.

&&

.CLIMATE...
Record High Minimum Temperatures:

May 20:
KEWR: 72/1996
KBDR: 61/2019
KNYC: 74/1996
KLGA: 77/1996
KJFK: 63/1996
KISP: 62/1996

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...None.
NJ...None.
MARINE...None.

&&

$$

DISCUSSION...JM/JP/BR
AVIATION...JP
MARINE...JM/BR

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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