Marine Weather and Tide Forecast for Norwalk, CT

NEAR TERM /THROUGH TODAY/
The steady light rain has ended, but there could be a few pockets of light rain or sprinkles overnight. Will maintain a slight chance of light rain and/or sprinkles. High pressure centered near Nova Scotia will build into the area tonight behind the departing low. This will bring in some drier through the night. This should keep Father's Day dry, but with plenty of cloudy clover. Model time height cross sections show mid level dry air with deep moisture below 700 mb. There could be enough drying for some peaks of sun in the afternoon across eastern CT and eastern LI.

Lows tonight will in the mid to upper 50s for much of the area, but around 60 for the NYC metro. Highs Sunday will be in the 60s to around 70. Stayed with the warmer NBM as locations on Saturday overachieved for those locations where the rain stopped. Airmass should be very similar, minus the rain.

SHORT TERM /TONIGHT THROUGH 6 PM MONDAY/
Weak high pressure will remain in control even as the center of the high gradually works east out into the North Atlantic.
There will remain plenty of low-level moisture with mostly cloudy conditions lingering for all but eastern LI and SE CT, where there could be breaks in the cloud cover. A weak easterly flow will continue as well with high pressure across the area and a stalled frontal boundary to the south over the Mid Atlantic states.

Lows Sunday night will change little in the mid to upper 50s, except around 60 for the NYC metro. Highs Monday will begin there gradual uptick heading into the upcoming week, around 70 for most locations.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/
Weak riding aloft Monday night into Tuesday as the h5 flow gets amplified by a shortwave shifting in to the Ohio Valley. Most of the time is expected to be dry as the mean ridging aloft should help offset any subtle PVA, but left in a slight chance of an afternoon shower across the western half of the forecast area as per NBM. The warm front then moves through during the day Wednesday with rain chances for both Tuesday night due to lift ahead of the front, and for Wednesday with frontal passage itself, followed by increasing instability later in the day.

Global models still disagree regarding when of an amplifying h5 trough axis shifts through within the Thursday night-Friday time frame. GFS has slowed down noticeably in this regard over the past 24 hours, with ECMWF and Canadian more consistently showing the axis shifting through during Friday morning. Not surprisingly, LREF ensemble clusters therefore lean toward the EPS/CMCE camp over GEFS.
Associated cold front is therefore still slated for a Thursday night passage, but before then, a pre-frontal trough may act as a focus for convective initiation in an increasingly unstable air mass. As such, NBM has expanded likely PoPs (60-70%) into most of the Lower Hudson Valley and adjacent spots for Thursday afternoon/early evening. Potential shear and CAPE would lead to the chance of at least strong thunderstorms. Too early in the game to have much confidence in the severe wx potential, but something to watch.
Leaned more toward the 25th percentile NBM for highs on Thursday for most spots, which is still warmer than the deterministic numbers. h8 temps progged at 18-19C without too much convective debris should allow for low-mid 90s in the typically warmest spots. This coupled with dewpoints around 70 could have some heat impacts.

High pressure would then be the dominant feature for Friday and Saturday with only perhaps a weak cold front or trough moving through during Friday night. Cold pool aloft on Friday could help trigger an isolated afternoon shower or thunderstorm. High temperatures both days in the 80s and about 3-5 degrees above normal.

AVIATION /06Z SUNDAY THROUGH THURSDAY/
A stationary front will remain to the south of the terminals through Sunday night. High pressure builds towards the terminals from the northeast through Sunday, and remains Sunday night.

MVFR through the TAF period at the NYC metro terminals and east, except becoming VFR at KGON mid morning. MVFR, becoming VFR at KBDR and KSWF by midday, with timing uncertain, depending how quickly high pressure builds in from the northeast. There is a chance that the NYC metro terminals briefly become VFR late Sunday afternoon into the early evening, however, confidence is low.

There is a chance of light rain at the NYC metro terminals this morning with no impacts to visibilities or ceilings.

NE winds around 10 kt or less through the TAF period.

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

Improvement to VFR possible late Sunday afternoon into the early evening.


OUTLOOK FOR 06Z MONDAY THROUGH THURSDAY

Late Sunday Night: MVFR, except VFR likely at KGON and KSWF.

Monday: MVFR possible.

Tuesday: Mainly VFR. slight chance of showers late day into the night, with a chance of MVFR to IFR.

Wednesday - Thursday: Mostly VFR. A chance of showers and thunderstorms, mainly in the afternoon and evening.

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

MARINE
SCA remains up for the ocean waters tonight with NE flow at 15 to 20 kt and gusts up to 25 kt. Seas will build to around 5 ft.
The flow relaxes some the second half of the night. It is possible that 5 ft seas linger a bit longer into Sunday morning.
Confidence remains low. Otherwise, sub SCA conditions expected through Monday.

Winds and seas remain below SCA levels across all waters Monday night through at least Thursday morning. SW winds pick up in the afternoon ahead of a cold front, with gusts possibly up to 25 kt on the ocean - lasting into the evening. Ocean seas could reach 5 ft Thursday night into Friday.

HYDROLOGY
No hydrologic impacts expected through the end of the week.

Next chance for impacts would be Thursday into Thursday night with scattered thunderstorms. The airmass is moist, but the anticipated speed of the cells would mitigate potential rain amounts. With that said, there's still the potential of at least minor urban/poor drainage flooding.

TIDES/COASTAL FLOODING
There is a moderate rip current risk at ocean beaches on Sunday with an E-SE wave component around 4 ft at 6s. The rip current risk is low on Monday and the E-SE wave component subsides to around 3 ft at 7s.

OKX WATCHES/WARNINGS/ADVISORIES
CT...None.
NY...None.
NJ...None.
MARINE...Small Craft Advisory until 6 AM EDT early this morning for ANZ350-353-355.