Sunday, March29, 2020
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Marine Weather and Tides
Greenport, NY

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:35AMSunset 7:14PM Sunday March 29, 2020 1:30 AM EDT (05:30 UTC) Moonrise 9:29AMMoonset 12:00AM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 909 Pm Edt Sat Mar 28 2020
.small craft advisory in effect through Sunday afternoon...
Overnight..E winds 15 to 20 kt. Gusts up to 25 kt. Waves 1 ft or less, then around 2 ft. Occasional rain late this evening, then occasional rain and drizzle. Patchy fog. Vsby 1 to 3 nm.
Sun..E winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Occasional rain and drizzle in the morning, then light rain and drizzle in the afternoon. Patchy fog in the morning. Areas of fog in the afternoon. Vsby 1 to 3 nm.
Sun night..E winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Waves 2 to 3 ft in the evening, then 1 ft or less. Light rain and drizzle likely in the evening. Areas of fog. Vsby 1 to 3 nm.
Mon..NW winds 5 to 10 kt. Waves 1 ft or less. Chance of showers in the afternoon.
Mon night..N winds 5 to 10 kt. Waves 1 ft or less. Chance of showers in the evening.
Tue..NE winds 5 to 10 kt. Waves 1 ft or less.
Tue night..E winds 5 to 10 kt. Waves 1 ft or less.
Wed..NE winds around 10 kt. Waves 1 ft or less.
Wed night..N winds 10 to 15 kt. Waves 1 ft or less.
Thu..NW winds 10 to 15 kt. Waves 1 ft or less.
Thu night..NW winds around 10 kt. Waves 1 ft or less.
ANZ300 909 Pm Edt Sat Mar 28 2020
Synopsis for the long island waters and new york harbor.. A warm front will continue to approach from the south overnight, stalling just south of long island Sunday morning. Weak low pressure and a trailing cold front will then move across the waters Sunday night. Low pressure over the western great lakes and new england weakens Monday into Tuesday. Another low passes well south and east during the middle of the week, followed by high pressure to close out 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 290118 AFDOKX

Area Forecast Discussion National Weather Service New York NY 918 PM EDT Sat Mar 28 2020

SYNOPSIS. A warm front will continue to approach from the south overnight, stalling just south of Long Island Sunday morning. Weak low pressure and a trailing cold front will then move across the area Sunday night. Low pressure over the western Great Lakes and New England weakens Monday into Tuesday. Another low will pass well south and east during the middle of the week, followed by high pressure to close out the week.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. Occasional rain will continue tonight as a warm front slowly approaches from the south. A closed upper low will track toward the Great Lakes tonight, while a high amplitude ridge will work off the eastern seaboard. This will place the area under prolonged period of large scale warm advection. The low levels are becoming saturated as noted by lowering ceilings and visibilities.

Much of the dynamics are displaced well west of the area, there is decent thermal forcing through the overnight as a 35-40 kt southerly LLJ works across the area. While widespread rain may diminish overnight, there is enough low level moisture to continue a high probability of measurable rain. This will likely come in the form of intermittent light rain and drizzle.

East winds will strengthen through tonight with the potential for gusts up to 25 mph, mainly near the coast.

Lows will remain well above normal, generally in the mid 40s.

SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/. Warm front stalls just south of Long Island on Sunday with occasional rain and drizzle through most of the day. Gusty east winds along the coast in the morning will diminish through the afternoon. A frontal wave will then approach from the west in the afternoon. While there is marginal elevated instability in the afternoon with height falls aloft, there is no surface based instability and the forcing is week. There could be a brief shower in the evening hours as a weak cold front passes through the area, otherwise any light rain and/or drizzle will taper off during the evening hours.

Highs Sunday will be around 50, with lows again the 40s.

LONG TERM /MONDAY THROUGH SATURDAY/. Stacked low pressure over the western Great Lakes region will track southeast into northern and central New York Monday morning into Tuesday morning, weakening as it does so. Associated cold pool aloft will lead to some instability, while at the surface, an inverted trough will be in place. This will allow enough instability and lift for some light showers through the period, though exactly where they will be is still uncertain. However, highest chances would be for areas closest to the stacked low, which would be for more northern portions of the forecast area. Best chances for showers would be Monday afternoon into the first part of Monday night.

Mainly dry conditions are then forecast Tuesday afternoon through the rest of the week. However, there will be chances for passing showers as a coastal low passes well south and east late Tuesday night into Wednesday, mainly across western and southern sections.

As the storm intensifies and expands well east of the region Thursday night, the western edge of the precipitation field will move westward toward our area. Some vorticity maxima may move through aloft, as well as spokes of surface troughs rotating around the low which will aid in the possibility for showers, but right now, looks to only be a slight chance for extreme eastern areas.

Thereafter, dry conditions are forecast through the end of the week with high pressure building in.

Other than some above normal temperatures for Monday, seasonable temperatures are expected through the week.

AVIATION /01Z SUNDAY THROUGH THURSDAY/. A warm front will approach from the south through tonight. The front becomes stationary south of Long Island on Sunday.

Flight categories are continuing to lower to IFR with pockets of LIFR in rain. IFR and LIFR conditions are likely through the rest of the night. The rain may become intermittent overnight and could be in the form of drizzle. Light rain and drizzle continue Sunday morning with IFR, possibly LIFR at times, is expected through the day. Some improvement is possible late in the day.

NE-E winds become 10-15 kt overnight especially near the coast. Gusts up to 20 kt are also expected near the coast into Sunday morning. NE-E winds around 10-15 kt Sunday morning and afternoon gradually weaken late in the day.

OUTLOOK FOR 00Z MONDAY THROUGH THURSDAY. Sunday Night. IFR or LIFR early, then improving to VFR late. Monday. Mainly VFR. A few showers possible in the afternoon and at night. Tuesday-Wednesday. Mainly VFR. Slight chance of showers Tuesday morning and then again on Wednesday. Thursday. VFR.

MARINE. East winds will continue to gradually strengthen through the with SCA conditions developing across all waters with gusts 25 to 30 kt. Seas will build to 5 to 8 ft on the ocean and 2 to 4 ft on the sound, possibly as high as 5 ft in spots. Winds will diminish from west to east on Sunday as the pressure gradient relaxes. However, SCA seas are expected to linger on the ocean waters through Sunday night.

Waves on the ocean waters will remain around 5 ft Monday, diminishing slowly through the day, falling below 5 ft early Monday night. Thereafter, light winds will lend to sub SCA waves.

A coastal storm will pass well south and east of the region in the middle of the week, however it will pass far enough south to allow winds to remain below 25 kt through the forecast period.

HYDROLOGY. Rainfall amounts through Sunday evening will range from 0.50 to 0.75 inches. This will be falling over a long period of time, so no hydrologic impacts are expected with this system. No hydrologic impacts are anticipated through the coming week.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is undergoing its final stages of testing, and is operating at full power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . Small Craft Advisory until noon EDT Sunday for ANZ335-338. Small Craft Advisory until 6 PM EDT Sunday for ANZ330-340-345. Small Craft Advisory until 6 AM EDT Monday for ANZ350-353-355.

SYNOPSIS . JP/DW NEAR TERM . DW/DS SHORT TERM . DW LONG TERM . JP AVIATION . DS MARINE . JP/DW HYDROLOGY . JP/DW EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MTKN6 - 8510560 - Montauk, NY 22 mi42 min 44°F 44°F1018.4 hPa
NLNC3 - 8461490 - New London, CT 23 mi42 min NE 2.9 G 7 45°F 44°F1019.1 hPa
NWHC3 - 8465705 - New Haven, CT 31 mi42 min E 2.9 G 8 46°F 44°F1018 hPa
BRHC3 - 8467150 - Bridgeport, CT 43 mi42 min E 13 G 20 45°F 44°F1017.9 hPa

Wind History for New London, CT
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chester, Chester Airport, CT21 mi35 minE 82.50 miLight Rain43°F42°F100%1018.3 hPa
The Gabreski Airport, NY23 mi37 minE 9 G 225.00 miLight Rain Fog/Mist45°F43°F93%1017.6 hPa
Groton / New London, Groton / New London Airport, CT23 mi34 minENE 114.00 miLight Rain Fog/Mist44°F44°F100%1019 hPa
Montauk, Montauk Airport, NY24 mi36 minENE 9 G 16 mi45°F43°F93%1018.8 hPa

Link to 5 minute data for KSNC

Wind History from SNC (wind in knots)
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Last 24hrNE4NE3CalmCalmCalmCalmSE5E4E5E7SE5E6
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2 days agoN6N6
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Tide / Current Tables for Greenport, Shelter Island Sound, New York
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Shinnecock Canal, Railroad Bridge, New York Current
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Shinnecock Canal
Click for Map
Sun -- 01:23 AM EDT     -0.00 knots Slack
Sun -- 04:31 AM EDT     -1.41 knots Max Ebb
Sun -- 06:37 AM EDT     Sunrise
Sun -- 08:23 AM EDT     0.00 knots Slack
Sun -- 09:29 AM EDT     Moonrise
Sun -- 10:40 AM EDT     1.02 knots Max Flood
Sun -- 01:37 PM EDT     -0.00 knots Slack
Sun -- 04:36 PM EDT     -1.22 knots Max Ebb
Sun -- 07:12 PM EDT     Sunset
Sun -- 08:08 PM EDT     0.00 knots Slack
Sun -- 11:00 PM EDT     1.27 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.3-0.5-1.1-1.4-1.4-1-0.6-0.20.40.910.80.4-0.3-0.9-1.2-1.2-0.9-0.5-0.10.411.3

Weather Map
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wmap_A
GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (1,6,7,8)
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Ground Weather Radar Station Upton, NY
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.