Greenport, NY Marine Weather and Tide Forecast
L-36.com

Marine Weather and Tide Forecast for Greenport, NY


December 10, 2023 6:42 PM EST (23:42 UTC)
Sunrise 7:03AM   Sunset 4:22PM   Moonrise  5:34AM   Moonset 3:29PM 

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. Privacy and Cookie policy

Marine Forecasts
    EDIT      Help
ANZ340 Peconic And Gardiners Bays- 337 Pm Est Sun Dec 10 2023
.storm warning in effect through Monday morning...
Tonight..S winds 20 to 25 kt with gusts up to 40 kt, increasing to 25 to 30 kt with gusts up to 50 kt late this evening and overnight. Waves 2 to 4 ft. Rain with isolated tstms. Vsby 1 to 3 nm.
Mon..W winds 20 to 25 kt with gusts up to 35 kt. Waves 2 to 4 ft. Showers in the morning.
Mon night..W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Waves around 2 ft.
Tue..W winds 5 to 10 kt. Waves 1 ft or less.
Tue night..SW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft.
Wed..W winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Waves around 2 ft.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.
Thu..NW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft.
Thu night..W winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Fri..W winds around 15 kt with gusts up to 25 kt. Waves around 2 ft.
Fri night..W winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft.
winds and waves may be higher in and near tstms.

ANZ300 337 Pm Est Sun Dec 10 2023
Synopsis for the long island and connecticut coastal waters.. A strengthening frontal system pushes through tonight into Monday morning. The deepening low pressure along it will move away quickly into canada by Monday evening. High pressure will then build from the southwest on Monday night into Tuesday. A cold front approaches Tuesday night and passes through late Tuesday night or Wednesday morning. Another high will then build from the west for later in the week, then shift off the new england coast Saturday night.


7 Day Forecast for Marine Location Near Greenport, NY
   Hourly   EDIT   Help   Map

Area Discussion for - New York City/Upton, NY
      (on/off)   Help   
NOTE: mouseover dotted underlined text for definition
FXUS61 KOKX 102150 AFDOKX

Area Forecast Discussion National Weather Service New York NY 450 PM EST Sun Dec 10 2023

SYNOPSIS
A strengthening frontal system pushes through tonight into Monday morning. The deepening low pressure along it will move away quickly into Canada by Monday evening. High pressure will then build from the southwest on Monday night into Tuesday. A cold front approaches Tuesday night and pass through late Tuesday night or Wednesday morning. Another strong high will then build from the west for later in the week, then shift off the New England coast Saturday night.

NEAR TERM /THROUGH MONDAY/
A very dynamic system will impact our area into tonight, continuing to advance downstream from Appalachians and into the the eastern coastal plain. The complex frontal system along with the cold front is forecast to be progressive across the southern U.S. as the base of the upper trough becomes negatively tilted as it swings from the Lower Mississippi Valley to the East Coast through tonight, with a deepening surface low forecast to track from the Mid Atlantic into the Northeast late tonight into Monday AM.

The first batch of rain with a few embedded convective elements is shifting northeast. Even though this batch exits to the north, a train of heavy rain with a few embedded thunderstorms, or at least claps of thunder get established from south to north as it gets later in the evening. This is all due to a conveyor belt of moisture with anomalous high for this time of the year PWATs and Integrated Water Vapor Transport. All the ingredients are in place for a widespread heavy rain event, with a thick warm cloud layer up to 9 to 10 kft, PWATs up to 1.5 inches, and mean RH up around 95 percent.
A very strong LLJ of 60-65 kt providing a classic warm tongue at 850 and 925 mb, along with a trough going negatively tilted is suggestive of an active night. This saturated deep layer column shown by all guidance and upstream soundings only increases confidence for a significant event. To the east of the boundary is lots of high theta E or low latitude air origin, thus the warm rain processes will be in place to drive some higher rainfall rates. WPC has put the area in a rare slight risk of excessive rainfall, with a moderate risk across portions of Central and Eastern CT. See the hydrology section for further details.

The period of strongest winds along the east side of the frontal boundary will be going forward until about 1-2 AM for the eastern half of the city and Nassau, and until 3 AM for Central LI, and until 6-7 am for far eastern portions of LI and New London, CT.
Gusts up to 55-60 mph seem like they can happen. The forecast model soundings do not have the strongest of inversions, and have more of an isothermal look to them, thus a 2-3 hour window for the strong to damaging wind gusts is in place. Also, the a wet soil from tonight's heavy rain could result in some uprooted trees. Thus the High Wind Warning continues, with the addition now of Southern New London, CT.
Northern New London, CT is now in a wind advisory until late Mon morning. The front should begin to pivot through eastern areas towards 8-10z. The winds will decrease a bit momentarily into the start of the morning commute for a couple of hours as the winds switch around to the NW quickly. As this happens, across NW zones, particularly Orange County look for the precip to end as a brief period of snow. With surface temps likely still being above freezing any snow will have difficulty sticking, with perhaps a dusting or so on the grassy surfaces. The column dries out quickly so any stead snow would end quickly, with snow showers lingering into the mid morning hours, especially in the higher elevations.

During Monday morning lingering showers will move away to the northeast, thus toward mid to late morning day skies will be clearing from SW to NE. The winds will pick up again, but not get to the highest levels seen during the night. Gusts of 35 to 40 mph appear to be a good bet for the mid to late morning as cold advection is maximized as the upper trough axis pivots through. Late in the day and into the evening the pressure gradient begins to decrease somewhat. It will be a good 10 to 15 degrees cooler with 40s across the area into the afternoon.

SHORT TERM /MONDAY NIGHT/
As high pressure builds from the southwest look for the winds to gradually decrease with gusts still around 20 to 25 mph at times during the evening. After midnight under clear skies any gusts should end with temperatures falling to seasonably cold levels.
Temperatures should get below freezing in most places with lows in the middle and upper 20s in the more rural area, to mainly lower 30s across the city and urban locations.

LONG TERM /TUESDAY THROUGH SUNDAY/
No changes to the long term. Followed the NBM closely.

Quasi-zonal flow aloft in the wake of one departing trough on Tue will give way to another northern stream trough on Wednesday, which should drive a cold front through either late Tuesday night or Wednesday morning. Confluent mid level flow after this trough passage, followed by ridging aloft Fri, will then maintain strong sfc high pressure over the area, with perhaps a weak intervening cold frontal passage Friday night. Guidance has been trending towards hanging on to high pressure over the area through the weekend. As high pressure shifts east is where model spread starts to really increase. There is potential for another low pressure system to impact the area late Sunday, but large differences remain in timing, strength and location.

Forecast follows the NBM for the most part given close enough NWP model guidance agreement during this time frame, with only minor adjustments. Fair wx should prevail through the period, with only slight chance to chance PoP for next Sunday. Near normal temps Tue- Wed, and a little below normal Wed night-Thu after the cold frontal passage, should moderate to a few degrees above normal Fri-Sat via ridging sfc and aloft.

AVIATION /22Z SUNDAY THROUGH FRIDAY/
** HIGH AVIATION IMPACTS EXPECTED THROUGH MOST OF THE TAF PERIOD **

A strong cold front moves through tonight.

Mostly IFR through the night with rain, heavy at times, and iso TSTM. Precipitation may mix with or briefly change over to snow Monday morning at KSWF. Not enough confidence to include in the TAF at this time.

Strengthening southerly flow into this evening, more so from approx KJFK/KLGA eastward. LLWS for all but KSWF until the cold front passage. 2kft winds 60kt+ at KISP and KGON, and 45-55kt for the other terminals.

FROPA timing is 1-4Z for western and NYC terminals and 6-10Z for eastern coastal terminals as the cold front slows down. Behind the FROPA, winds shift to the NW-WNW with gusts 25-35kt lasting well into the day Monday.

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

Isolated TSRA possible before around 03-05z, but somewhat less likely before 01z. Forecast winds and gusts may be too strong by at least 5 kt this evening ahead of the cold front.

OUTLOOK FOR 18Z SUNDAY THROUGH FRIDAY...

Monday: VFR in afternoon. NW-WNW winds G25-35kt

Tuesday: VFR. SW gusts 15-20 kt in the afternoon.

Wednesday: VFR. W to NW gusts 15-20 kt in the afternoon.

Thursday and Friday: VFR.

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

MARINE
Continuing with Gale and Storm warnings on the area waters as a strong cold front pushes across the waters tonight. Storm warnings are in effect for the central and eastern ocean zones as well as the south shore bays, Peconic and Garners Bays and the eastern part of Long Island Sound. These locations have the best chances to see wind gusts reach 50 kt, especially from about midnight tonight through early Monday morning. The Storm warnings are up until 11am, however its possible they will be able to be dropped down to a Gale warning earlier. Gales are then expected on all waters through much, if not all of the day Monday, with small craft conditions likely into at least the first of Monday night.

Sub small craft conditions may prevail for a good portion of Tuesday across the waters in all likelihood, with small craft conditions returning through the remainder of the period. Meanwhile W flow gusting up to 25 kt on all waters Tue night, should shift NW by Wed morning after a cold frontal passage. Gusts could peak at 30 kt on the ocean Wed night. Lingering 25 kt gusts are possible, especially on the eastern ocean and the open Sound waters into daytime Thursday.

HYDROLOGY
A flood watch remains in effect through Monday morning for the entire area. Across portions Central and Eastern Southern Connecticut, 3 to 5 inches of rainfall is likely, with locally 6+ amounts possible. For Long Island 2 to 4 inches is likely, with locally 4+ inch amounts possible. Most of this rain will fall in a 12 hour period.

As a result, widespread urban and poor drainage flooding is likely, with some areas of more significant flooding possible, including the flooding of some rivers and streams. WPC has much of the forecast area in a Slight Risk in their excessive rainfall outlook for today and tonight, with a rare Moderate Risk for Central and Eastern portions of Southern CT. Based on the current rainfall forecast main stem rivers across CT are forecast to reach minor and moderate flood stage.

TIDES/COASTAL FLOODING
A strong cold front will bring increasing S flow into tonight. The system brings potential for minor coastal flooding with the Monday morning high tide cycle. Winds quickly shift to the W-NW late tonight/early Monday morning, which will help keep water levels down during times of high tide. That said, latest Stevens NYHOPS 95th percentile numbers and taking into account wave runup on south facing coastlines suggest some potential for the CT coastline and the forks of Long Island to touch minor thresholds.

OKX WATCHES/WARNINGS/ADVISORIES
CT...Flood Watch through Monday afternoon for CTZ005>012.
Wind Advisory until 11 AM EST Monday for CTZ008-010-011.
High Wind Warning until 11 AM EST Monday for CTZ012.
NY...Flood Watch through Monday afternoon for NYZ067>075-078>081- 176>179.
High Wind Warning until 11 AM EST Monday for NYZ078>081.
Wind Advisory until 6 AM EST Monday for NYZ075-176>179.
NJ...Flood Watch through Monday afternoon for NJZ002-004-006- 103>108.
MARINE...Gale Warning until 6 PM EST Monday for ANZ331-335-338-355.
Storm Warning until 11 AM EST Monday for ANZ332-340-345-350- 353.


Weather Reporting Stations
   EDIT       (on/off)   Help
Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 21 mi43 min SSW 23G26 57°F
MTKN6 - 8510560 - Montauk, NY 22 mi55 min 57°F 49°F29.78
NLHC3 24 mi55 min 59°F 47°F29.80
NWHC3 - 8465705 - New Haven, CT 31 mi55 min SSW 14G16 54°F 48°F29.80
BRHC3 - 8467150 - Bridgeport, CT 43 mi55 min SSW 6G11 55°F 50°F29.73
44069 47 mi73 min 53°F 43°F53°F

toggle option: (graph/table)

Wind History for New Haven, CT
(wind in knots)    EDIT      (on/off)   Help


Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KSNC CHESTER,CT 21 sm27 minS 12G208 smOvercast Lt Rain 59°F59°F100%29.80
KFOK FRANCIS S GABRESKI,NY 23 sm49 minS 12G197 smOvercast Lt Rain 57°F55°F94%29.83
KGON GROTONNEW LONDON,CT 23 sm21 minSSW 168 smOvercast Lt Rain 57°F57°F100%29.81
KMTP MONTAUK,NY 24 sm48 minSSW 09G19--57°F55°F94%29.85

Wind History from SNC
(wind in knots)


Tide / Current for Greenport, Long Island Sound, New York
   
EDIT   Weekend mode (on/off)   (on/off)   Help
Greenport
Click for Map
Sun -- 01:46 AM EST     0.31 feet Low Tide
Sun -- 04:33 AM EST     Moonrise
Sun -- 07:03 AM EST     Sunrise
Sun -- 08:02 AM EST     2.85 feet High Tide
Sun -- 02:28 PM EST     Moonset
Sun -- 02:35 PM EST     0.00 feet Low Tide
Sun -- 04:20 PM EST     Sunset
Sun -- 08:31 PM EST     2.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Greenport, Long Island Sound, New York, Tide feet
12
am
0.8
1
am
0.4
2
am
0.3
3
am
0.6
4
am
1.2
5
am
1.8
6
am
2.3
7
am
2.7
8
am
2.8
9
am
2.7
10
am
2.2
11
am
1.6
12
pm
1.1
1
pm
0.5
2
pm
0.1
3
pm
0
4
pm
0.4
5
pm
0.9
6
pm
1.4
7
pm
1.8
8
pm
2.1
9
pm
2.1
10
pm
1.8
11
pm
1.4



Tide / Current for Shinnecock Canal, Railroad Bridge, New York Current
   EDIT      (on/off)   Help
Shinnecock Canal
Click for Map
Sun -- 01:04 AM EST     0.00 knots Slack
Sun -- 03:53 AM EST     1.51 knots Max Flood
Sun -- 04:33 AM EST     Moonrise
Sun -- 07:03 AM EST     Sunrise
Sun -- 07:04 AM EST     -0.00 knots Slack
Sun -- 10:15 AM EST     -1.57 knots Max Ebb
Sun -- 02:03 PM EST     0.00 knots Slack
Sun -- 02:30 PM EST     Moonset
Sun -- 04:21 PM EST     Sunset
Sun -- 04:22 PM EST     1.12 knots Max Flood
Sun -- 07:10 PM EST     -0.00 knots Slack
Sun -- 10:20 PM EST     -1.43 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Shinnecock Canal, Railroad Bridge, New York Current, knots
12
am
-0.6
1
am
-0
2
am
0.7
3
am
1.3
4
am
1.5
5
am
1.4
6
am
0.9
7
am
0.1
8
am
-0.7
9
am
-1.3
10
am
-1.6
11
am
-1.5
12
pm
-1.1
1
pm
-0.7
2
pm
-0
3
pm
0.7
4
pm
1.1
5
pm
1.1
6
pm
0.8
7
pm
0.1
8
pm
-0.6
9
pm
-1.2
10
pm
-1.4
11
pm
-1.3




Weather Map
       (on/off)   Help


GEOS Local Image of north east   
EDIT

Upton, NY,



NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE