Marine Weather Net

Long Island Sound East of New Haven CT/Port Jefferson NY Marine Forecast


TODAY

NW
WINDS
20 - 25
KNOTS

TONIGHT

NW
WINDS
20 - 25
KNOTS

SUN

NW
WINDS
20 - 25
KNOTS

SUN NIGHT

NW
WINDS
15 - 20
KNOTS

The Marine Weather Forecast In Detail:
ANZ330 Forecast Issued: 1247 PM EST Sat Jan 23 2021

GALE WARNING IN EFFECT THROUGH SUNDAY MORNING
Today...Nw Winds 20 To 25 Kt With Gusts Up To 35 Kt. Seas 2 To 4 Ft.
Tonight...Nw Winds 20 To 25 Kt With Gusts Up To 35 Kt. Seas 2 To 4 Ft. Chance Of Light Freezing Spray.
Sun...Nw Winds 20 To 25 Kt, Diminishing To 15 To 20 Kt In The Afternoon. Gusts Up To 35 Kt. Seas 2 To 3 Ft. Chance Of Light Freezing Spray In The Morning.
Sun Night...Nw Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt After Midnight. Gusts Up To 30 Kt. Seas 2 To 3 Ft.
Mon...Nw Winds 10 To 15 Kt With Gusts Up To 20 Kt, Diminishing To 5 To 10 Kt In The Afternoon. Seas 1 Ft Or Less.
Mon Night...Ne Winds 5 To 10 Kt. Seas 1 Ft Or Less. Chance Of Snow After Midnight.
Tue...Ne Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas 1 Ft Or Less. Snow Likely. Vsby 1 To 3 Nm.
Tue Night...N Winds 10 To 15 Kt With Gusts Up To 20 Kt. Seas Around 2 Ft.
Wed...N Winds 5 To 10 Kt. Seas Around 2 Ft.
Wed Night...N Winds Around 10 Kt. Seas 1 Ft Or Less.
SHARE THIS PAGE:           
1247 PM EST Sat Jan 23 2021
Synopsis for the Long Island Waters and New York Harbor - ANZ300
Low pressure slowly weakens over the Canadian Maritimes this weekend, while high pressure builds in from the west. The high weakens Sunday night and Monday as low pressure approaches. The low passes south of the area Monday night into Tuesday night. High pressure returns Wednesday through Friday. Another low may move south of the region Thursday.
Area Forecast Discussion
National Weather Service New York NY
1251pm EST Sat Jan 23 2021

Synopsis
Low pressure slowly weakens over the Canadian Maritimes this weekend, while high pressure builds in from the west. The high weakens Sunday night and Monday as low pressure approaches. The low passes south of the area Monday night into Tuesday night. High pressure returns Wednesday through Friday. Another low may move south of the region Thursday.

Near Term - Until 6pm This Evening
A few minor changes with this update, specifically with temperatures being a degree or two warmer.

The combination of high pressure building in from the west and low pressure gradually weakening over the Canadian Maritimes this weekend, will result in a decent pressure gradient across the area through this afternoon. Gusty NW winds are expected through the day and into the evening, gusting 30-35 mph.

Skies will generally remain mostly sunny through the day save for any midlevel stratocumulus during the afternoon that advects in from the northwest. High temperatures will struggle to get into the upper 20s to low 30s, with wind chills in the upper teens today under the brisk northwest flow.

Short Term - 6pm This Evening Through Sunday Night
High pressure continues to build in from the west Saturday night into Sunday morning with dry conditions in store. Low temperatures Sunday morning will be quite cold, in the low teens to near 20 across NYC and western Long Island, under mostly clear skies. Winds should stay up into Sunday morning, which may temper lows a bit. Wind chills will be in the single digits to the low teens. For now went with NBM temperatures, and adjusted toward lower MOS values, especially across the interior and SW CT.

The gusty NW winds will continue overnight Saturday and into the day on Sunday, though less so than on Saturday, 20-25 mph and finally beginning to taper by Sunday evening. Highs on Sunday will moderate somewhat into the lower and middle 30s, closer to normal for this time of year.

Long Term - Monday Through Friday
Progressive flow will dominate across the country with near zonal flow. A shortwave moves into the ridge through Monday, reaching the Ohio Valley by 00Z Tuesday. This shortwave passes through the area during Tuesday. Guidance has come into better consensus with the track of the upper ridge and the track and depth of the surface low. There still is some uncertainty with the track and how the system will interact with the northern stream broad longwave trough. The trend has been for a more northern track. At this time the column will remain cold enough for an all light snow event. However, if the northern stream is weaker the storm may track farther north and mixing will be possible along the coast. And if the blocking remains in place with a stronger northern stream, the low will track farther to the south. At this time the precipitation begins Monday evening and continues into early Tuesday evening, with a prolonged period of light snow. Another low does begin to develop off the mid Atlantic coast early Tuesday, and with the progressive flow moves quickly east into the Atlantic. Again, on the current track the potential for higher impacts will be across areas north and west, with lower impacts to areas east of New York City, and portions of southeastern Connecticut, as high pressure remains to the north.

High pressure and a building upper ridge return for Wednesday. Then another southern system quickly moves into the ridge Wednesday night into Thursday, with the potential for another surface low tracking south of the area. Then high pressure returns for Friday.

Marine
High pressure is in control with strong NW flow through Sunday. Gales will persist across the ocean waters, the Eastern Sound and Peconic and Gardiners Bays today into Sunday. Elsewhere, SCA are forecast through Sunday. There is a chance of light freezing spray across the ocean waters and western LI Sound for a period late Saturday night into early Sunday, given the combination of subfreezing air temperatures, strong winds and wave action over these areas. Warm sea surface temperatures may mitigate this to be more scattered in nature across the waters.

Winds and ocean seas will be gradually diminishing below SCA (Small Craft Advisory) levels by Monday morning as the pressure gradient weakens.

Sub SCA (Small Craft Advisory) conditions are expected Monday through Tuesday. Ocean seas 5 to 6 feet will be possible Tuesday night into Wednesday, with marginal wind gusts, as northerly winds increase behind departing low pressure.

Small craft conditions will once again be possible on the ocean waters Thursday as winds and seas increase with a low that is expected to pass south of the waters.

Hydrology
Mainly dry conditions are expected through the weekend. No hydrologic concerns are anticipated through next week.

NOAA New York NY Office: Watches - Warnings - Advisories
CT...None. NY...None. NJ...None.
MARINE...
Small Craft Advisory until 11am EST Sunday for ANZ335-338-345. Gale Warning until 7am EST Sunday for ANZ330-340-350-353-355.