Sunday, April18, 2021
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Marine Weather and Tides
Portland, CT

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:03AMSunset 7:35PM Sunday April 18, 2021 1:59 AM EDT (05:59 UTC) Moonrise 10:05AMMoonset 1:04AM Illumination 37% Phase: Waxing Crescent; Moon at 6 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 600 Am Edt Tue Mar 30 2021
Today..E winds around 5 kt, becoming S late this morning and afternoon. Seas 1 ft or less.
Tonight..S winds around 10 kt. Seas 1 to 2 ft.
Wed..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Chance of showers in the morning, then chance of rain in the afternoon.
Wed night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 nm.
Thu..W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers.
Thu night..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Fri..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
ANZ300 1129 Pm Edt Sat Apr 17 2021
Synopsis for the long island waters and new york harbor.. Weak high pressure remains in the area into early next week. A strong cold front then crosses the area Wednesday into Wednesday night. High pressure then begins to build back slowly on Thursday.


7 Day Forecast for Marine Location Near Portland, CT
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location: 41.56, -72.63     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 180528 AFDOKX

Area Forecast Discussion National Weather Service New York NY 128 AM EDT Sun Apr 18 2021

SYNOPSIS. Weak high pressure remains in the area into early next week. A strong cold front then crosses the area Wednesday into Wednesday night. High pressure then briefly returns for the end of the work week into the first part of next weekend.

NEAR TERM /UNTIL 6 AM THIS MORNING/. Forecast on track.

Weak high pressure will be over the region. Just enough moisture and lift for the chance of a few sprinkles, but mainly a dry night is expected with low temperatures near or slightly above normal.

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM MONDAY/. High pressure remains relatively weak during this period, although heights will slowly build. Fair weather cumulus are expected to build during the day, but in the absence of significant lift it should remain dry.

Westerly winds through the boundary layer look just weak enough to allow for sea breezes to develop in the afternoon. This, and some uncertainty surrounding cloud cover complicate the high temperature forecast. 850mb temperature in the afternoon is expected to be near 1C, so this should allow for highs mostly in the lower and middle 60s. Deterministic NBM numbers are near the 25th percentile in most cases along with the median not leaning toward the 25th percentile. Will therefore go with the 50th percentile numbers, having more support from the ensembles and 850mb temps, and made minor tweaks mainly for sea breezes.

Dry weather then continues Sunday night. A shortwave and moisture approach from the west late at night. Not of much consequence from this - probably just a thickening of clouds.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/. A shortwave crosses the area during the day on Monday, but with low levels remaining relatively dry and the best upper support remaining south of the area, not expecting more than a slight chance of showers. Any showers that do develop will quickly come to an end Monday evening as the shortwave move offshore and ridging builds aloft. This will result in a dry and generally sunny day on Tuesday, with temperatures rising above normal under broad southwest flow.

Clouds will increase Tuesday evening ahead of a developing low across the Ohio Valley. Models are in generally good agreement with this system, taking it into western New York by Wednesday morning, then continuing north into northern New England by Thursday morning. While much of Tuesday night will remain dry, showers will overspread the area from west to east through the day on Wednesday ahead of a strong cold front that is expected to cross the region Wednesday evening. The best chance of rain will be Wednesday afternoon into Wednesday evening. A few rumbles of thunder are possible during the afternoon as well, primarily for New York City and points north and west.

The showers will come to an end Wednesday night as the cold front pushes offshore. Behind the front, much cooler air will be ushered into the region on Thursday under gusty westerly flow. With the surface and upper lows lingering across New England, can't completely rule out a few showers Thursday into Thursday night, but expect that the area will remain mostly dry during this time frame.

High pressure then briefly builds into the region on Friday before shifting offshore Saturday afternoon. The next system then begins to approach the region from the south late in the day on Saturday. As would be expected at this time range, significant model differences remain, so for now included just slight chance to low end chance PoPs Saturday night.

AVIATION /06Z SUNDAY THROUGH THURSDAY/. VFR as weak high pressure builds over the region through tonight.

Mainly light flow under 5 kt early this morning will become NW after day break. The flow backs a bit towards the W, possibly WSW, in the afternoon. A SW sea breeze is likely at ISP, BDR, and GON in the afternoon with a S-SSW sea breeze at JFK. Winds become light overnight.

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

Timing of the S-SSW sea breeze at JFK may be off by 1-2 hours. The direction may vary 20-30 degrees to the right of forecast once the sea breeze passes the terminal. This sea breeze may cross LGA 21-23z as winds weaken in the early evening.

OUTLOOK FOR 06Z MONDAY THROUGH THURSDAY. Sunday Night. VFR. Monday. Mainly VFR. Slight chance of showers. Tuesday. VFR. Wednesday. MVFR or lower possible. Showers likely with a slight chance of thunder from NYC metro on west. Thursday. Mainly VFR.

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

MARINE. A weak pressure gradient will continue over the waters through the rest of the weekend with relatively light winds and conditions remaining below advisory levels.

Sub-SCA conditions are expected for the start of the work week, although wind gusts could approach SCA criteria on the ocean waters west of Fire Island Inlet for several hours Tuesday afternoon into Tuesday evening. Low pressure and an associated cold front then approach the waters during the day on Wednesday. Winds will increase through the day on Wednesday, with gusts on the ocean approaching 25 kt by Wednesday evening. Winds then continue to increase Wednesday night and remain gusty through the day on Thursday, with SCA conditions expected on all waters. Ocean seas will also increase to 5-7 ft. and remain elevated through Thursday night.

HYDROLOGY. No hydrologic impacts are expected through the forecast period.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . None.

SYNOPSIS . FEB/JC NEAR TERM . FEB/JC SHORT TERM . JC LONG TERM . FEB AVIATION . DS MARINE . FEB/JC HYDROLOGY . FEB/JC


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWHC3 - 8465705 - New Haven, CT 24 mi66 min NNW 5.1 G 8 49°F 48°F1010.2 hPa
44039 - Central Long Island Sound 29 mi60 min Calm G 1.9 47°F 44°F
NLNC3 - 8461490 - New London, CT 32 mi66 min 45°F 1009.2 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 34 mi50 min NW 6 G 6 46°F 1008.1 hPa33°F
BRHC3 - 8467150 - Bridgeport, CT 40 mi66 min W 1.9 G 4.1 49°F 47°F1009.1 hPa

Wind History for New Haven, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Meriden, Meriden Markham Municipal Airport, CT11 mi67 minN 010.00 miOvercast44°F38°F79%1009.3 hPa
Hartford, Hartford-Brainard Airport, CT12 mi67 minN 010.00 miOvercast46°F38°F73%1009.1 hPa
Chester, Chester Airport, CT14 mi65 minN 010.00 miOvercast45°F36°F71%1009.1 hPa
New Haven, Tweed-New Haven Airport, CT23 mi67 minNW 310.00 miOvercast50°F36°F59%1009.2 hPa

Link to 5 minute data for KMMK

Wind History from MMK (wind in knots)
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Last 24hrNW7NW8NW6NW4CalmNW6NW7N7N8NW14
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W9NW10N7NW8NW10N5NW4NW5NW3CalmCalmCalmCalmCalm
1 day agoN7NW7NW5NW4N4NW6--NW9N11
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2 days agoSE4CalmE3E4CalmCalmE3CalmSE5SE7SE4SE7SE7SE4SE7E6NE7N7N4NE85N6N5N5

Tide / Current Tables for Portland, Connecticut
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Portland
Click for Map
Sun -- 12:53 AM EDT     0.73 feet Low Tide
Sun -- 01:04 AM EDT     Moonset
Sun -- 05:51 AM EDT     2.26 feet High Tide
Sun -- 06:05 AM EDT     Sunrise
Sun -- 10:04 AM EDT     Moonrise
Sun -- 01:46 PM EDT     0.42 feet Low Tide
Sun -- 06:43 PM EDT     1.74 feet High Tide
Sun -- 07:34 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.91.41.92.22.32.21.91.51.210.70.50.40.71.11.51.71.71.61.41.21.1

Tide / Current Tables for Rocky Hill, Connecticut
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Rocky Hill
Click for Map
Sun -- 01:05 AM EDT     Moonset
Sun -- 02:08 AM EDT     0.68 feet Low Tide
Sun -- 06:05 AM EDT     Sunrise
Sun -- 06:44 AM EDT     2.08 feet High Tide
Sun -- 10:04 AM EDT     Moonrise
Sun -- 03:02 PM EDT     0.39 feet Low Tide
Sun -- 07:34 PM EDT     Sunset
Sun -- 07:36 PM EDT     1.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.80.70.81.31.722.121.71.41.10.90.70.50.40.611.41.61.61.51.31.1

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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