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Forecast Discussion for New York City/Upton, NY
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466
FXUS61 KOKX 091147
AFDOKX
Area Forecast Discussion
National Weather Service New York NY
747 AM EDT Tue Jun 9 2026
.WHAT HAS CHANGED...
High rip current risk has been issued for ocean beaches
from Southwest Suffolk west through Brooklyn today into this
evening.
&&
.KEY MESSAGES...
1) Seasonable and dry conditions through tonight.
2) Airmass trending warmer towards late week, becoming hot and
humid Thursday and Friday.
3) Showers back in the forecast mid to late week with potential
for thunderstorms as well.
4) Weekend into early next week, initially still hot but not as
humid. Mainly dry conditions.
&&
.DISCUSSION...
.KEY MESSAGE 1...
High pressure will move farther out into the Atlantic.
Seasonable temperatures along with dry conditions expected
today. These temperatures will be warmer than yesterday, ranging
from the mid 70s to lower 80s. Clouds increase tonight ahead of
a low pressure system to the west. Relatively warmer lows result
tonight, ranging from upper 50s to mid 60s.
.KEY MESSAGE 2...
Airmass will be getting warmer and more humid especially towards
Thursday and Friday. Overall pattern in mid levels conveys
ridging. Wednesday night lows will be warmer than the previous
night by several degrees. The area will be getting into the
warm sector during this timeframe of early Thursday through
Friday. SW flow advects in low level warm air.
Thursday highs mostly upper 80s to lower 90s range across the
region with some mid 90s in NE NJ. Friday highs slightly less
values with the range, mainly mid 80s to lower 90s across the
region. Dewpoints during these days will be in the upper 60s to
near 70 degrees, making the air feel quite uncomfortable. The
resulting heat indices reach mid 90s to near 100 for maximum
during the day for much of the region Thursday and much of the
western half of the region for Friday.
The characteristics of this airmass diagnosed by 850mb
temperatures rise near 18 to 20 degrees C Thursday into Friday.
.KEY MESSAGE 3...
Mid level trough moves in Wednesday with a warm front
approaching and moving through from the west. Clouds will be
abundant and chances of showers will increase. The resulting
temperatures will be a little lower compared to the previous day
but the airmass will be getting more humid. Chances for
thunderstorms will be slight during the afternoon hours.
For Thursday, less mid level forcing present but temperatures
will be remarkably warmer with more sunshine, generating more
CAPE. There is some positive vorticity advection on a smaller
scale late day Thursday into Thursday evening which will have a
higher chance of showers and thunderstorms. These could be
locally strong to possibly severe with some models indicating a
significant amount of CAPE, around a few thousand J/kg of CAPE.
Models have differences in the CAPE and bulk shear 0-6 km AGL
near 25-35 kt.
Layer precipitable waters at times approach 2 inches, with
potential for heavy downpours with thunderstorms.
A cold front approaching for Friday will make for another chance
of showers and thunderstorms.
.KEY MESSAGE 4...
The cold front may slow down upon its exit for the weekend,
potentially lingering some showers, but just a slight chance.
Overall, weekend looks to be mainly dry with lower dewpoints.
Still hot temperatures near 90 for quite a few locations. Max
heat indices stay mostly under 90 though.
&&
.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
High pressure to the south gradually shifts further offshore.
VFR through tonight.
WSW flow backs SW-S into early afternoon as speeds increase
to 10-15 kt, and could be a little stronger (15-20 kt) at KJFK
with Ambrose jet development possibly enhancing speeds here.
Gusts to around 20 kt at city terminals as well, with an
occasional gust possible elsewhere. Any gusts subside in the
evening, and SW flow continues into Wed AM, speeds under 10 kt.
Lowering cigs after 12Z Wed and MVFR conds possible at times w/
developing SHRA.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
Gusts may be more occasional at times.
Sustained speeds at JFK could briefly reach 20 kt mid to late
afternoon.
.OUTLOOK FOR 12Z WEDNESDAY THROUGH SATURDAY...
Wednesday: MVFR or lower possible in showers during the
afternoon/evening. Thunderstorms possible, primarily north and
west of the NYC metros. SW winds G20kt.
Thursday-Friday: MVFR or lower possible at times w/ chances of
showers and thunderstorms in the afternoon and evening.
Saturday: Generally VFR.
Detailed information, including hourly TAF wind component forecasts,
can be found at: https:/www.weather.gov/zny/n90
&&
.MARINE...
Marginal SCA conditions for western ocean late today into this
evening with otherwise sub-SCA conditions through the weekend
with the overall synoptic pattern.
Rip Currents...
For today into this evening, the rip current risk for Southwest
Suffolk back west through Brooklyn ocean beaches is high. This
is due to southerly fetch increasing and building waves to 3 to
4 ft with around 4-5 second period southerly swell as well as
southerly winds increasing onshore to near 20 kt during the
afternoon. For Southeast Suffolk ocean shorelines today into
this evening, waves and onshore winds are expected to be less
with a moderate rip current risk for those beaches.
For Wednesday, southwest flow near 10-15 kt is expected along
the ocean beaches with main southerly swell of near 3-4 ft with
near 5 second period. Rip current risk for ocean beaches
Wednesday is moderate.
&&
.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...High Risk for Rip Currents through this evening for NYZ075-080-178-
179.
NJ...None.
MARINE...None.
&&
$$
DISCUSSION...JM
AVIATION...DR
MARINE...JM
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