Monday, April19, 2021
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Marine Weather and Tides
Greenport, NY

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 6:02AMSunset 7:36PM Monday April 19, 2021 11:21 PM EDT (03:21 UTC) Moonrise 11:00AMMoonset 1:53AM Illumination 57% Phase: First Quarter Moon; Moon at 8 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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ANZ340 Peconic And Gardiners Bays- 1102 Pm Edt Mon Apr 19 2021
Rest of tonight..SW winds around 5 kt. Waves 1 ft or less.
Tue..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves 1 ft or less.
Tue night..SW winds 10 to 15 kt. Waves 1 ft or less.
Wed..S winds 10 to 15 kt with gusts up to 25 kt. Waves 1 ft or less. Showers.
Wed night..W winds 20 to 25 kt with gusts up to 30 kt. Waves 1 ft or less, then 2 to 3 ft after midnight. Showers likely, mainly in the evening.
Thu..W winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to 3 ft.
Thu night..W winds 20 to 25 kt with gusts up to 30 kt. Waves 2 to 3 ft.
Fri..W winds 15 to 20 kt with gusts up to 25 kt. Waves 1 to 2 ft.
Fri night..W winds 10 to 15 kt with gusts up to 25 kt. Waves 1 ft or less.
ANZ300 1102 Pm Edt Mon Apr 19 2021
Synopsis for the long island waters and new york harbor.. High pressure moves offshore overnight into Tuesday. A strong cold front approaches Tuesday night, moving across the waters late Wednesday. High pressure follows for the end of the week.


7 Day Forecast for Marine Location Near Greenport, NY
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location: 41.1, -72.37     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 192348 AFDOKX

Area Forecast Discussion National Weather Service New York NY 748 PM EDT Mon Apr 19 2021

SYNOPSIS. An upper level trough passes through the area this evening. Shortwave ridging builds in for Tuesday, giving way to a low pressure system. Deepening low pressure passes just west or through the area on Wednesday. High pressure builds in behind the system, then another low may impact the area over the weekend.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. Mid level shortwave trough will slide offshore this evening, with weak ridging and subsidence building in from the west into the overnight. Shwrs will continue to decrease in coverage and intensity thru 2Z. With light winds and some good radiational cooling, some locally patchy fog is not out of the question overnight, especially across Long Island and coastal CT. Have left fog out of the grids, however, as it's not expected to be widespread and confidence is low. NARRE_TL and SREF all have low probs, 20-30% of <3mi, in the aforementioned areas. Low temps will be in the upper 40s across the area, with NBM temperatures used with local adjustments.

SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/. The upper ridge axis settles to the east of the area on Tuesday as high pressure builds in from the west. Deep southwesterly flow results, as a deeper trough takes shape over the Great Lakes. The day should remain mostly cloud free. West/southwest winds and a deep mixed layer will keep the region dry, gusty and warm during the day. Winds will be gusty--15-20mph by the afternoon. NBM deterministic max temperatures were again below the interquartile range for most locations, so adjusted up to near the 50th-75th percentile, which gives highs in the low 70s for the urban areas, and in the mid to upper 60s elsewhere. This approach has worked well this spring for this kind of regime when the deterministic NBM temps are on the low end of the ensemble envelope. By Tuesday night, the upper trough and attendant cold front begin to push east through central PA. Cloud cover will be on the increase as the frontal system approaches, with precipitation chances increasing somewhat toward daybreak.

LONG TERM /WEDNESDAY THROUGH MONDAY/. Two lows to look at in the extended. The first develops along a strong cold front near the Oh Valley on Tue. This low deepens as it passes thru the area on Wed. The GFS/ECMWF/NAM all take the low on basically same track thru the Hudson Valley. This track puts the area in the warm sector with chances for some convection invof the low passage. Ern areas will be much more stable in the llvls than wrn areas, which will have the best chance for tstms. Areas most at risk for tstms are NJ, all of NY outside of LI, and Fairfield county in CT. The main threat for svr is damaging winds with 40-50kt of wind already available in the low to mid lvls.

Strong caa Wed ngt. Low temps in the 30s for all areas, with perhaps a few 20s across the nwrn interior.

The cold airmass produces highs about 5-10 degrees blw normal for Thu. With h85 winds progged blw 50kt attm, did not go advy strength in the grids attm. However, winds can often overperform this time of year with deep mixing so it is something to watch.

Fair wx Fri into Sat, then low pres develops over the sern conus and tracks offshore for the 2nd half of the weekend. This would be a rainstorm. This far out, there is still some uncertainty wrt the track and intensity. Nonetheless, NBM likely pops were used for the fcst due to the current model consensus.

AVIATION /00Z TUESDAY THROUGH SATURDAY/. Weak low pressure moves off the mid-Atlantic coast tonight with weak high pressure briefly building in for Tuesday.

Mainly VFR conditions are expected through the TAF period. There will be a chance for some low clouds and patchy fog for eastern terminals late tonight into early Tuesday morning, but confidence remains too low to put in TAFs at this time.

Initially the winds will be S-SW up to 10 kt early this evening for most terminals, then the winds become more variable in direction and light thereafter as they lower to 5 kts or less. The winds will be increasing by the early afternoon on Tuesday to 10-15 kt, with gusts near 20 kt into the afternoon.

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

Amendments not anticipated through much of tonight, with maybe the exception of some patchy fog for a few of the eastern terminals late. On Tuesday gusts may occur 1 to 2 hours earlier than indicated in TAFs.

OUTLOOK FOR 0Z WEDNESDAY THROUGH SATURDAY. Tuesday night. Mainly VFR. MVFR possible late at night. Possible rain showers north and west of NYC terminals for late night. LLWS possible late with SW winds of 40 kt at 2kft. Wednesday. MVFR or lower possible. LLWS likely with SW winds of 45- 50 kt at 2kft. Showers with a chance of thunder. S gusts 20-25kt, becoming W to NW going into the evening. Thursday. VFR. WNW gusts 25-30kt. Friday. VFR. WNW gusts 20-25kt. Saturday. MVFR possible with a chance of rain. S-SW gusts near 15 kt.

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

MARINE. Winds and seas will remain below SCA levels through Tuesday with a weak pressure gradient in place. With southwesterly flow increasing by Tuesday afternoon, and a prefrontal trough approaching by late Tuesday night, occasional gusts of 20-25 kt are possible, especially over the ocean waters.

An sca will likely be needed on Wed as low pres passes n of the waters. As the low pulls away, increasing wly winds will approach gale force Wed ngt and Thu. Lingering sca conditions possible on Fri, especially on the ocean with elevated seas. All areas briefly blw sca lvls on Sat before a coastal low impacts the area Sat ngt and Sun.

HYDROLOGY. No hydrologic impacts are expected through the week.

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




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44039 - Central Long Island Sound 15 mi82 min Calm G 1.9 50°F 47°F
MTKN6 - 8510560 - Montauk, NY 22 mi52 min 48°F 48°F1011.3 hPa
NLNC3 - 8461490 - New London, CT 23 mi52 min 51°F 1011.4 hPa
NWHC3 - 8465705 - New Haven, CT 31 mi52 min SSE 1.9 G 1.9 53°F 51°F1011.8 hPa
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 33 mi32 min SW 3.9 G 5.8 48°F 47°F1 ft1011.7 hPa47°F
BRHC3 - 8467150 - Bridgeport, CT 43 mi52 min NE 1.9 G 1.9 53°F 50°F1010.5 hPa
44069 47 mi67 min SW 5.8 G 7.8 54°F 55°F49°F

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chester, Chester Airport, CT21 mi27 minN 010.00 miOvercast54°F39°F58%1011.2 hPa
The Gabreski Airport, NY23 mi29 minN 00.25 miFog38°F37°F97%1012 hPa
Groton / New London, Groton / New London Airport, CT23 mi26 minN 010.00 miPartly Cloudy47°F41°F80%1011.1 hPa
Montauk, Montauk Airport, NY24 mi28 minN 0 mi48°F46°F93%1011.8 hPa

Link to 5 minute data for KSNC

Wind History from SNC (wind in knots)
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Tide / Current Tables for Greenport, Long Island Sound, New York
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Greenport
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Mon -- 01:53 AM EDT     Moonset
Mon -- 03:59 AM EDT     2.40 feet High Tide
Mon -- 06:03 AM EDT     Sunrise
Mon -- 11:00 AM EDT     Moonrise
Mon -- 11:02 AM EDT     0.48 feet Low Tide
Mon -- 04:59 PM EDT     1.91 feet High Tide
Mon -- 07:33 PM EDT     Sunset
Mon -- 11:10 PM EDT     0.88 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.72.12.32.42.321.61.30.90.60.50.611.41.71.81.91.81.61.41.210.9

Tide / Current Tables for Shinnecock Canal, Railroad Bridge, New York Current
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Shinnecock Canal
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Mon -- 12:00 AM EDT     1.16 knots Max Flood
Mon -- 01:53 AM EDT     Moonset
Mon -- 03:11 AM EDT     -0.00 knots Slack
Mon -- 06:04 AM EDT     Sunrise
Mon -- 06:34 AM EDT     -1.19 knots Max Ebb
Mon -- 10:31 AM EDT     0.00 knots Slack
Mon -- 11:01 AM EDT     Moonrise
Mon -- 12:32 PM EDT     0.84 knots Max Flood
Mon -- 03:30 PM EDT     -0.00 knots Slack
Mon -- 06:48 PM EDT     -0.99 knots Max Ebb
Mon -- 07:34 PM EDT     Sunset
Mon -- 10:17 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.210.70.1-0.5-1-1.2-1.2-0.9-0.6-0.30.30.80.80.60.3-0.3-0.7-0.9-1-0.8-0.5-0.10.4

Weather Map
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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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