Monday, January20, 2020
Privacy Policy
L-36.com


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 7:09AMSunset 4:52PM Monday January 20, 2020 6:23 AM EST (11:23 UTC) Moonrise 4:16AMMoonset 2:16PM Illumination 23% Phase: Waning Crescent; Moon at 25 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
    EDIT      (on/off)   Help
ANZ340 Peconic And Gardiners Bays- 328 Am Est Mon Jan 20 2020
.small craft advisory in effect until 10 am est this morning...
Today..N winds 15 to 20 kt, diminishing to 10 to 15 kt late. Gusts up to 25 kt early. Waves around 2 ft.
Tonight..NW winds 10 to 15 kt. Waves around 2 ft in the evening, then 1 ft or less.
Tue..NW winds 5 to 10 kt. Waves 1 ft or less.
Tue night..N winds 5 to 10 kt. Waves 1 ft or less.
Wed..N winds 5 to 10 kt. Waves 1 ft or less.
Wed night..N winds around 5 kt. Waves 1 ft or less.
Thu..NW winds around 5 kt. Waves 1 ft or less.
Thu night..W winds around 5 kt, becoming nw after midnight. Waves 1 ft or less.
Fri..NE winds 5 to 10 kt. Waves 1 ft or less.
Fri night..NE winds 10 to 15 kt. Waves 1 ft or less.
ANZ300 328 Am Est Mon Jan 20 2020
Synopsis for the long island waters and new york harbor.. High pressure gradually builds towards region today, then over the waters through the middle of the week. The high will begin to retreat into the maritimes on Fri.


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


Area Discussion for - New York City/Upton, NY
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KOKX 200857 AFDOKX

Area Forecast Discussion National Weather Service New York NY 357 AM EST Mon Jan 20 2020

SYNOPSIS. A Canadian high will builds towards the area today, and set up over the area for most of the week. The high will begin to retreat on Friday, with low pressure potentially impacting the area over the weekend.

NEAR TERM /UNTIL 6 PM THIS EVENING/. MSAS centered a 1043 high over nern SD at 8Z. The center of the high will build to around Omaha by 00Z. The pressure across the forecast area will build around 10mb today. A gradual decrease in winds is expected as the gradient weakens. High temperatures below freezing, with the NBM used. Wind chills in the single digits and teens.

SHORT TERM /6 PM THIS EVENING THROUGH 6 AM TUESDAY/. Cold with single digits and teens for lows. A blend of the guidance was used, which was much colder than the NBM. If winds overperform, the forecast temperatures may be too cold. Most likely spots for the winds to stay up are the north shore of Long Island, New York City and close surrounds, and the remaining immediate shorelines. Areas with snow cover over CT and the Hudson Valley, along with the Pine Barrens of Long Island, will be the most likely spots to decouple.

LONG TERM /TUESDAY THROUGH SUNDAY/. Quiet for much of the period with the influence of high pressure until next weekend with a high moving farther northward and approaching low pressure from the south.

For Tuesday and going through Thursday, an air mass from the North Central US will be building into the region. Strong high pressure builds in gradually from the west Tuesday through Wednesday, moving overhead Wednesday night into Thursday. This will make for light and variable winds with the very weak pressure gradient. The high weakens Thursday night into Friday allowing for more clouds to move into the region as subsidence weakens.

Dry weather is expected through Friday. Next chances for precip arrive Friday night with increasing chances of precip for next weekend.

Next weekend, forecast has gusty E-NE flow and some potential heavy precip. Track of low center moves near region, either directly over the region or offshore. A lot of uncertainty with this event being a week away especially with the speed and position of the low center. Precip type will be highly dependent on track. Overall looking at the ECMWF, GFS, and Canadian models, the center of the low could track close enough to have some warming aloft. The retreating high going farther northward signals some cold air damming potential so with temperatures at 850mb getting potentially a few degrees C above freezing, could have a wintry mix Friday night into early Saturday changing to rain Saturday from south to north. Depending on how the low evolves next weekend, could have some wintry precip as well as Saturday night into Sunday. Have this as a rain and snow mix across the interior with a forecast of having the low move east of the area with colder air working into the area on the backside of the low.

Regarding temperatures, the air mass for Tuesday through Wednesday will be from the North Central states. Winds will be northerly but gradually decreasing as the center of the high moves in closer to the local area. The decrease of northerly winds will gradually lessen the cold air advection allowing for the air mass to moderate by midweek. Conveyed a gradual warmup for daytime highs each day Tuesday through Thursday going from several degrees below normal to several degrees above normal. There is more weight towards MOS for all temperatures Tuesday through Tuesday night as well as Wednesday night and Thursday night. The nighttime temperature use more MOS to convey radiational cooling conditions with more vast range of lows between NYC and rural sections.

AVIATION /09Z MONDAY THROUGH FRIDAY/. High pressure gradually builds to the west through tonight.

VFR.

NW winds around 15ktg20-25kt through this afternoon for NYC/NJ metro terminals. Gusts will likely be occasional for outlying terminals early this morning, but they should become frequent around 20 kt once again by mid morning. The wind direction should average right of 310 magnetic through the period. Winds and gusts subside for the evening push.

OUTLOOK FOR 06Z TUESDAY THROUGH FRIDAY. Late Tonight-Friday. VFR.

MARINE. Advisory level winds will gradually diminish today. The ocean will be the last place to fall below Small Craft Advisory levels tonight. Wavewatch was running a little low on the ocean so was adjusted up. Winds and seas then remain below advisory levels for the entire area until Friday, when swell from approaching low pressure could warrant an advisory on the ocean.

HYDROLOGY. There is potential for widespread precip next weekend. Still it is too soon to tell what exact hydrologic impacts there will be due to uncertainty with precip types and amounts.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is still operating at reduced power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . Small Craft Advisory until 6 PM EST this evening for ANZ338- 355. Small Craft Advisory until 10 AM EST this morning for ANZ330- 335-340-345. Small Craft Advisory until 8 PM EST this evening for ANZ350- 353.




Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 21 mi28 min NW 18 G 24 20°F 1016.5 hPa8°F
MTKN6 - 8510560 - Montauk, NY 22 mi53 min 22°F 40°F1018.1 hPa
NLNC3 - 8461490 - New London, CT 23 mi53 min 20°F 43°F1017.7 hPa
NWHC3 - 8465705 - New Haven, CT 31 mi53 min 20°F 37°F1018.8 hPa
BRHC3 - 8467150 - Bridgeport, CT 43 mi53 min 19°F 39°F1019.5 hPa

Wind History for New London, CT
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
-12
PM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
-12
PM
6
AM
Last
24hr
W3
NW1
W4
G7
NW5
G8
N7
G11
NW4
G7
NW5
G11
N4
G8
N3
G7
NW5
G9
NW3
G7
N6
G9
N4
N4
G10
N9
G13
N5
G14
NW4
G10
NW7
G14
NW6
G11
N8
G14
N10
G15
NW4
G8
1 day
ago
NW3
G6
N3
G9
N4
G7
NW2
S2
S5
G8
S5
S4
S5
SE4
E3
NE1
N3
S11
S12
G17
SW3
NW1
N3
SW4
SW5
G11
W5
G8
W4
G9
W4
G8
W4
G8
2 days
ago
NW7
G13
N13
G19
NW8
G16
N14
G25
N11
G17
N9
G18
N15
G19
N8
G13
N10
G17
N6
G17
NW7
G14
N9
G12
N7
G11
N4
G7
NW3
G6
NW4
G7
N5
G9
NW3
N5
G9
NW5
NW3
W4
NW2
G7
N8
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chester, Chester Airport, CT21 mi68 minNNW 7 G 1310.00 miOvercast18°F6°F62%1017.3 hPa
The Gabreski Airport, NY23 mi30 minNNW 15 G 2210.00 miMostly Cloudy20°F8°F60%1019.5 hPa
Groton / New London, Groton / New London Airport, CT23 mi27 minNNW 1310.00 miFair19°F6°F57%1018.4 hPa
Montauk, Montauk Airport, NY24 mi29 minno data mi22°F9°F57%1018.3 hPa

Link to 5 minute data for KSNC

Wind History from SNC (wind in knots)
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hr--------W6
G13
------NW12
G22
NW10
G17
NW6
G13
NW10
G16
NW6
G12
--NW5NW12NW10
G16
NW15
G23
NW12
G23
--NW9
G14
NW13NW9
G19
N7
G13
1 day agoN44N4Calm------SW5SE5--E5--------S8----5
G12
6
G15
--------
2 days agoNW16
G24
--NW16
G26
----NW11
G22
NW11
G18
--NW12
G22
N9
G18
------N8
G15
N7
G13
N8N9--N7NW3NW5----N5

Tide / Current Tables for Greenport, Shelter Island Sound, New York
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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
   EDIT      (on/off)   Help   One Week of Data
Shinnecock Canal
Click for Map
Mon -- 02:16 AM EST     1.54 knots Max Flood
Mon -- 03:16 AM EST     Moonrise
Mon -- 05:28 AM EST     -0.00 knots Slack
Mon -- 07:10 AM EST     Sunrise
Mon -- 08:37 AM EST     -1.59 knots Max Ebb
Mon -- 12:17 PM EST     0.00 knots Slack
Mon -- 01:17 PM EST     Moonset
Mon -- 03:01 PM EST     1.09 knots Max Flood
Mon -- 04:52 PM EST     Sunset
Mon -- 05:34 PM EST     -0.00 knots Slack
Mon -- 08:48 PM EST     -1.53 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.61.31.51.51.10.4-0.4-1-1.5-1.6-1.3-0.9-0.20.611.110.4-0.3-0.9-1.4-1.5-1.3-0.9

Weather Map
       (on/off)   Help Weather Map
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 (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Upton, NY
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
Disclaimer:
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.