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Forecast Discussion for New York City/Upton, NY
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077
FXUS61 KOKX 031149
AFDOKX
Area Forecast Discussion
National Weather Service New York NY
649 AM EST Mon Nov 3 2025
.SYNOPSIS...
High pressure shifts farther out to sea tonight. Weak low pressure
then approaches from the south Monday ahead of a fast moving cold
front passage occurring Monday night. High pressure returns Tuesday
into Wednesday. A quick passing low moves through Wednesday
night into Thursday followed by high pressure again for Friday.
Another low may impact the area Friday night into Saturday.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Weak low pressure emerges off the Carolina coast early this
morning and heads NE through the day. An inverted trough
extends north toward the forecast area, acting as a focus for
moisture convergence. Meanwhile, upper troughing extending south
from Canada helps push a cold front through the Great Lakes
Region with the front crossing the local area in the evening.
There will be a brief period of subsidence created by the two
systems. Showers will still be possible from late morning
through early evening with lift from their respective mid level
shortwaves combined with an approaching left exit region of a
strong upper jet streak from the northern stream system. Models
continue with the trend of a wetter scenario, so have introduced
likely PoPs for eastern LI an SE CT. Highest overall chances of
rain would be in the afternoon to early evening.
Soundings show some weak MUCAPE of 100-150 J/kg, especially for
eastern areas, during the passage of the cold front, so some low
topped convection is possible. Added a short period of slight
chance thunder in the early evening as the cold front moves
through for the eastern half of the forecast area.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY NIGHT/...
High pressure then builds in from the west and a stronger
pressure gradient develops over the region thanks strengthening
low pressure near the Canadian Maritimes. Dry and turning
breezy overnight Monday into Tuesday with WNW gusts 20-30 mph.
Winds start diminishing Tuesday afternoon into Tuesday night
with the surface ridge shifting in. NBM temps were closely
followed in the short term. Seasonable temps are in the
forecast.
A very progressive pattern sets up for Wednesday and into the
long term with a series of high and low pressure systems passing
through Wednesday into next weekend.
High pressure remains over the area on Wednesday morning with an
area of low pressure developing to the NW that slides north of the
area by Wednesday night. Much of the day Wednesday is expected to be
dry with increasing chances for showers toward evening and into
Wednesday night as the low treks north of the area and into the
Gulf of Maine by late Wednesday night.
&&
.LONG TERM /THURSDAY THROUGH SUNDAY/...
Gusty NW flow expected as high pressure builds in once again
from the west on Thursday. High pressure settles over the area
late Thursday night and into Friday morning with once again
another low pressure system approaching from the Great Lakes
region. The low pushes a cold front through the area with a
chance of showers Friday night into Saturday morning. Another
pair of successive high and low pressure systems may impact the
area Saturday and Sunday respectively.
Regarding temperatures, highs each day Thursday through Sunday
will be fairly seasonable with temperatures generally in the
upper 50s to possibly lower 60s. The coolest days will be
Thursday and Sunday with gusty NW flow advecting in cooler air
where the highs are expected to be in the lower to middle 50s.
Lows follow a similar pattern with temperatures each night
being in the mid to upper 30s inland to the upper 40s along the
coast. The exception is Thursday night where cooler temperatures
across the area will mean lows in the 30s for much of the area,
to near 40 along the coast.
&&
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
Mainly VFR through the TAF period. Weak low pressure will pass
south of the area terminals today followed by a cold frontal
passage this evening.
Showers possible this afternoon for a period. Conditions should
remain VFR except for KISP and KGON which may briefly flirt
with MVFR cigs after 18Z. An additional line of showers is
expected this evening, mainly impacting KGON and KBDR after
Tuesday 00Z until about 04Z, though cigs remain VFR. Can not
rule out a isolated rumble of thunder with the showers after
00z.
Southerly winds around 10 kt or less, then winds become west-
northwest gusting 20-28kts behind the front. Gusts to near 30 kt
will be possible on Tuesday.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
Onset of precipitation today may be off an hour or two.
Timing of gusts this evening may be off by an hour or two.
.OUTLOOK FOR 12Z TUESDAY THROUGH FRIDAY...
Monday Night-Tuesday: VFR. NW winds G20-25kt Monday night and G25-30
kt on Tuesday.
Wednesday: VFR. Chance of showers at night SW-S winds G15-20 kt in
the afternoon, becoming W G15-25 kt at night.
Thursday: VFR. NW winds G20-25kt possible.
Friday: VFR. SW-S winds G15-20kt possible.
Detailed information, including hourly TAF wind component forecasts,
can be found at: https:/www.weather.gov/zny/n90
&&
.MARINE...
Conditions will remain below SCA levels through the day today.
Increasing winds ahead of a cold front passage should bring the
next chance of SCA conditions Monday night. SCA conditions then
continue on Tuesday and an advisory continues for all waters
except for the ocean waters from Fire Island Inlet to Montauk
Point. Gusts 25-30 kt expected during this time for these
locations. SPC HREF is showing a greater than 50% chance of
seeing 30 kt winds, with max wind speeds greater than 35 kt over
the ocean waters from Fire Island Inlet to Montauk Point as
well as the central and eastern sound. Additionally, HRRR 10 m
wind gust potential also supports even higher gusts of around 40
kt across some of these ocean zones. NBM probabilities of
greater than 35 kt is not as high, but looking at forecast
soundings, and seeing 40 to 45 kt at the top of the mixed layer,
along with 35 to 40 kt average in the mixed layer. This is
likely due to cold frontal passage and strong cold advection
immediately after the passage. Therefore, decided to issue a
Gale Watch for the ocean waters from Fire Island Inlet to
Montauk Point. The remaining ocean zone may see occasional
gusts to gale force, but do not think it will quite hit it often
enough at this time.
Winds then diminish Tuesday night.
Waves build to 5 to 9 ft on the ocean waters late tonight into
Tuesday morning, slowly subsiding late Tuesday morning onward.
Waves should fall below 5 ft on the ocean by late Tuesday night.
Sub-SCA conditions are then expected on all waters through
Wednesday morning, but winds and waves increase once again to
above SCA criteria on the ocean by Wednesday afternoon. All
other waters may see SCA conditions with gusts near 25 kt by
Wednesday night. These conditions persist for all waters through
at least Thursday afternoon. It`s also possible that the ocean
sees gale conditions with gusts 35-40 kt late Wednesday night
into Thursday afternoon. A brief period of calm conditions may
overspread the area by Thursday night, but SCA conditions
quickly return by Friday afternoon.
&&
.HYDROLOGY...
There are no hydrologic concerns through this week.
&&
.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...None.
NJ...None.
MARINE...Small Craft Advisory from 6 PM this evening to 6 PM EST
Tuesday for ANZ331-332-335-338-340-345-355.
Gale Watch from 6 PM EST this evening through Tuesday
afternoon for ANZ350-353.
&&
$$
SYNOPSIS...JP
NEAR TERM...JP
SHORT TERM...JP
LONG TERM...JP
AVIATION...BC
MARINE...JP
HYDROLOGY...JP
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