597
FXUS61 KOKX 111049
AFDOKX
Area Forecast Discussion
National Weather Service New York NY
649 AM EDT Sun Aug 11 2024
.SYNOPSIS...
A frontal boundary will continue to push slowly east offshore
as high pressure noses in from the west through tonight. A low
pressure trough will approach on Monday and pass through by
Monday evening, then weak high pressure will be in control for
much of the week. A series of surface troughs may pivot through
toward the end of the week. The next frontal system may approach
next Saturday.
&&
.NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
Forecast mainly on track. A weak wave developing along the
frontal boundary to our south has brought clouds beck to much
of the NYC metro area. These should spread mainly east across
Long Island and perhaps coastal CT this morning, otherwise skies
today should be partly to mostly sunny, with some fair wx Cu
developing especially NW of NYC. A sprinkle cannot be ruled out
this morning near the coast. Light NW-N winds should become
light/variable as a lobe of the high building to the west
settles over the area, then SE-S sea breezes 5-10 mph expected
this afternoon, and a SW flow inland. A fine late summer day
expected in terms of temps and humidity, with highs mostly in
the lower 80s, and dewpoints mostly in the mid/upper 50s.
Skies becoming mostly clear and winds becoming light W-NW
tonight should promote good radiational cooling especially
outside the NYC urban heat island. Temps in NYC should bottom
out in the mid 60s, with lower 60s for most coastal and suburban
spots, and mid/upper 50s well inland and in the Long Island Pine
Barrens.-- End Changed Discussion --
&&
.SHORT TERM /MONDAY THROUGH TUESDAY/...
An upper level trough pivots through on Monday and exits Monday
night, and should bring some afternoon/early evening showers
especially inland. There should also be some modest sfc-based
instability that just barely reaches the equilibrium level on
model fcst soundings, so have also mentioned slight chance of
thunder except for ern Long Island and SE CT. High temps on Mon
should reach the upper 70s/lower 80s, with dewpoints again in
the mid/upper 50s. Lows for Mon night should be the same in most
places, maybe a touch cooler in the outlying areas, where some
isolated lower 50s may be possible.
The stretch of warm and pleasantly dry wx will continue into
Tue, with temps/dewpoints on Tue similar to those fcst for Mon.
&&
.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
No major changes were made to the long term forecast Tuesday night
through next Saturday.
Key Points:
* Mainly dry conditions are expected. There is just a low
chance of a shower or thunderstorm Thursday, Friday, and
Saturday afternoon/evening.
* Temperatures will be near to slightly below seasonable levels
for this time of year.
Broad upper level troughing will remain over the region Tuesday
night into Wednesday, but should shift off the New England
coast late in the week. Weak surface high pressure largely
remains in control. Cyclonic flow and suppressed heights will
likely remain Thursday and Friday with the trough just to the
east. Some energy will likely pivot around the trough and may
help induce some weak surface troughs Thursday and Friday. These
troughs and associated upper energy may be enough to develop a
shower or thunderstorm in the afternoon and evening both
Thursday and Friday, mainly inland. Coverage remains uncertain
this far out and have capped PoP at slight chance, similar to
the latest NBM.
The trough shifts farther offshore late Friday into the start
of next weekend. Heights may briefly rise before another trough
attempts to establish itself over the northeast next weekend.
This may also help send the next frontal system towards the area
and aid in triggering some showers or possibly a thunderstorm
Saturday afternoon and evening.
Temperatures through much of the period will be slightly below
normal for mid August. Dew points will remain lower than they
have been for much of the summer. There may be a slight uptick
in dew points and humidity by next weekend, but still holding
short of seeing dew points in the 70s.
&&
.AVIATION /12Z SUNDAY THROUGH THURSDAY/...
-- Changed Discussion --
VFR with high pressure in control.
Light and variable flow to start will become W-WSW at most
terminals except along the coast where winds should become
SW-S by afternoon. Wind speeds increase to near 10 kt this
afternoon. Winds diminish this evening as they veer to the
W-WNW.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
Variable wind direction 12z-15z, but speeds should remain 5 kt
or less.
Winds at KLGA could end more NW-N into early this afternoon.
OUTLOOK FOR 12Z MONDAY THROUGH THURSDAY...
Monday: VFR. Afternoon/early evening shower/thunderstorm
possible.
Tuesday-Thursday: VFR.
Detailed information, including hourly TAF wind component
forecasts, can be found at: https:/www.weather.gov/zny/n90-- End Changed Discussion --
&&
.MARINE...
Seas were still flirting with 5 ft near 44025 and 44097 but are
on the decline, so have not re-issued SCA. Otherwise, a weak
pressure gradient will lead to winds and seas below SCA levels
into late week.
&&
.HYDROLOGY...
There are no hydrologic concerns through next week.
&&
.TIDES/COASTAL FLOODING...
Gradually subsiding onshore swell of 3-4 ft with 8-second period
lingers into today, highest east. RCMOS forecasts a high risk
until late afternoon for Hither Hills, and until midday for
Smith Point, which makes sense given the ongoing swell and just
having come off a high risk yesterday. Will go with that
guidance and forecast a moderate risk at other forecast points
for W Suffolk, Nassau, and NYC. Can re-evaluate this as AM beach
reports come in.
The rip current risk should drop to low for the more western
ocean beaches on Monday, with a moderate risk continuing for the
Suffolk ocean beaches with a 2-3 ft swell.
&&
.OKX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
CT...None.
NY...High Risk for Rip Currents until 2 PM EDT this afternoon for NYZ081.
NJ...None.
MARINE...None.-- End Changed Discussion --
&&
$$
SYNOPSIS...BG/DS
NEAR TERM...BG/DS
SHORT TERM...BG
LONG TERM...DS
AVIATION...DS
MARINE...BG/DS
HYDROLOGY...BG/DS
TIDES/COASTAL FLOODING...