Friday, November27, 2020
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Marine Weather and Tides
Groton Long Point, CT

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:49AMSunset 4:22PM Friday November 27, 2020 11:27 PM EST (04:27 UTC) Moonrise 4:08PMMoonset 4:58AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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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ANZ237 Block Island Sound- 1016 Pm Est Fri Nov 27 2020
Overnight..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..NW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft.
Sat night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sun..W winds around 10 kt. Seas 2 to 3 ft.
Sun night..SW winds around 10 kt. Seas around 2 ft.
Mon..SE winds 15 to 20 kt with gusts up to 25 kt, increasing to 20 to 25 kt with gusts up to 40 kt in the afternoon. Seas 4 to 6 ft. Showers likely. Vsby 1 to 3 nm.
Mon night..S winds 20 to 25 kt, diminishing to 15 to 20 kt after midnight. Gusts up to 40 kt. Seas 6 to 9 ft. Showers. Vsby 1 to 3 nm.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 8 ft. A chance of showers.
Tue night and Wed..W winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 8 ft.
Wed night..W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 1016 Pm Est Fri Nov 27 2020
Synopsis for massachusetts and rhode island coastal waters.. Spotty showers are possible tonight. Otherwise, high pressure brings dry weather through the weekend. Strong low pressure moves across the northeast usa Monday and Tuesday, bringing the risk of strong southerly gales and high seas along with heavy rain. Mariners will want to stay tuned to the forecast. Dry weather returns on Wednesday. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo.


7 Day Forecast for Marine Location Near Groton Long Point , CT
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location: 41.3, -71.99     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 280241 AFDOKX

Area Forecast Discussion National Weather Service New York NY 941 PM EST Fri Nov 27 2020

SYNOPSIS. High pressure builds in for the remainder of the weekend. Developing low pressure across the southeast Sunday night will deepen on Monday as it tracks into the northeast. The low will meander near the Great Lakes region Monday night into Tuesday, before tracking into southeast Canada on Wednesday and Thursday. High pressure returns for the end of the week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/. Clouds have managed to dissipate or shift out of some of the forecast area over the past couple of hours. Expecting the sky to vary between mostly cloudy and mostly clear through night. Adjusted hourly temperatures and dewpoints along with the cloud cover as temps have been allowed to drop more quickly than previously forecast due to clearing in some areas. Still thinking lows generally be in the upper 30s to low 40s throughout the CWA, though some spots closer to the NYC metro may remain in the middle 40s.

SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/. A weak cold front moves through the area on Saturday with perhaps some breaks in the clouds. A few hi-res models do show the potential for some light passing showers by Saturday morning mainly for CT and the Lower Hudson Valley, but confidence on these is low and as such, decided to keep out of the forecast.

Either way, clouds should be fairly persistent through much of the day with gradual clearing into the afternoon. Winds will remain out of the NW and may pick up a bit during the afternoon as the pressure gradient tightens between the departing trough to the east and high pressure building in from the west. High temperatures will remain slightly above average, as they have for the last several days, with values in the middle to upper 50s in the NYC metro and Long Island with values in the low to middle 50s in the Lower Hudson Valley and CT.

Skies become mostly clear by Saturday night as high pressure builds in from the west. Though winds may be a bit brisk out of the NW, the potential for rapid radiational cooling exists for anywhere the wind can become calm for any period of time. Areas with the highest potential to cool are areas away from the coastline.

LONG TERM /SUNDAY THROUGH FRIDAY/. The 11/27 12z model suite has continue to come into better overall agreement through early next week. The main weather story will be with a deepening low pressure that tracks well to our west on Monday, sending a strong frontal system across the region on Monday night. This system will bring an all rain event, but a widespread soaking rainfall is expected.

Sunday will be dry with slightly above average for this time of year with surface high pressure along the eastern Seaboard. Highs will be in the lower to middle 50s.

A southern stream upper low and vortmax currently over the Four Corners region will track eastward this weekend and begin interacting with a progressive and digging northern stream shortwave Sunday night. The southern stream vort max will then phase into the northern stream by Monday night, becoming a larger upper cyclone. The timing of the phasing has slowed down since 24 hours ago. This has led to a bit weaker surface low pressure that deepens on as it tracks up the Appalachians to the northeast on Monday.

The low will send its associated warm front across the region Monday afternoon with widespread rain beginning Monday morning and continuing into the afternoon. The associated triple point will move across the region Monday evening which will effectively bring in drier air aloft and end the widespread rain. The rain may be locally heavy at times, especially Monday afternoon and evening. Due to the large scale synoptic forcing and some very weak instability, a rumble of thunder cannot be ruled out. The low level wind field also strengthens in the afternoon and evening, which could bring wind gusts 35 to 40 mph near the coast. Will have to monitor if portions of the area get fully into the warm sector which could bring a slightly better chance of thunderstorms. The chance for any wind headlines appears low at this time. The slower development of the overall system along appears to keep the strongest winds well to our south and east.

The main frontal system moving east of the area Monday night occurs with the drying aloft, significantly decreasing the coverage of rain. Winds should also weaken Monday night as the pressure gradient relaxes with the main surface low situated well to our northwest.

On Tuesday, an impressive vort max within the deep and anomalous upper low approaches the region. As the vort max and cold pocket aloft associated with the upper low moves overhead, there could be a few showers that develop in the afternoon. Otherwise, temperatures will slowly trend downward into Tuesday night. The upper low and surface low lift up into southeast Canada by Tuesday. Our region will still be within cyclonic flow aloft. Other than some scattered to broken clouds, dry conditions are forecast.

Surface high pressure returns for the end of the week. There may be another strong southern stream system developing across the Plains on Friday, but any impacts from this system would occur next weekend if this feature were to verify as currently modeled.

The warmest temperatures next week occur on Monday as strong southerly flow brings readings into the upper 50s and lower 60s. Temperatures trend downward the rest of the week with highs below normal on Wednesday and Thursday in the 40s.

AVIATION /03Z SATURDAY THROUGH WEDNESDAY/. High pressure remains in control.

VFR. Light NW winds for the rest of the night. NW winds increase Sunday afternoon with gusts under 20 kt.

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

No unscheduled amendments are expected.

OUTLOOK FOR 06Z SUNDAY THROUGH WEDNESDAY. Saturday night and Sunday. VFR. Monday. MVFR/IFR with rain. SE wind 15-20kt G25-40kt, strongest near the coast. Tuesday. MVFR with chance SHRA. SW-W G25-30kt. Wednesday. VFR. SW-W G20-25kt.

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

MARINE. Winds and seas will remain relatively calm and below SCA criteria under high pressure building into the area for the weekend. Sub SCA conditions are likely Sunday into Sunday night. Gales are possible on all waters Monday into Monday night. However, the highest probability of seeing gales may be on the ocean waters and possibly eastern Long Island Sound and eastern Long Island Bays. Will continue to mention potential in the HWO. Ocean seas will rapidly build on Monday, becoming 8 to 12 ft Monday night. High ocean seas should then continue through Tuesday night. Winds will weaken Monday night into Tuesday with small craft conditions most likely on the ocean. Small craft conditions on the ocean may continue on Wednesday.

HYDROLOGY. A period of moderate to heavy rain is expected Monday into Monday evening. A widespread 1 to 2 inch rainfall is forecast, which could lead to some minor urban flooding.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 7 mi58 min 55°F1013.9 hPa
MTKN6 - 8510560 - Montauk, NY 17 mi58 min 54°F1014.2 hPa
QPTR1 - 8454049 - Quonset Point, RI 37 mi58 min 50°F1014 hPa
NWPR1 - 8452660 - Newport, RI 38 mi58 min 53°F1014 hPa
NAXR1 - Narragansett Bay Reserve, RI 42 mi103 min NW 2.9 50°F 1015 hPa48°F
PRUR1 42 mi70 min 51°F 50°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 42 mi58 min 1014.5 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi58 min 51°F1013.2 hPa
FOXR1 - 8454000 - Providence, RI 47 mi58 min 48°F1014.1 hPa
PVDR1 47 mi58 min 1014.2 hPa
NWHC3 - 8465705 - New Haven, CT 49 mi58 min 51°F1015.4 hPa

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Groton / New London, Groton / New London Airport, CT4 mi92 minNNE 410.00 miOvercast51°F45°F80%1014 hPa
Westerly, Westerly State Airport, RI11 mi35 minN 08.00 miA Few Clouds45°F43°F93%1014.2 hPa
Montauk, Montauk Airport, NY16 mi34 minN 4 mi53°F46°F80%1014.6 hPa
Block Island State Airport, RI23 mi32 minN 310.00 miMostly Cloudy50°F48°F93%1014.5 hPa

Link to 5 minute data for KGON

Wind History from GON (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3CalmCalmSW4SW4SW4SW3CalmCalmCalmNW3CalmN4N4Calm
1 day agoS6S5SE5E5E6SE3S6S9S7S5SW9SW11S16S10S9SW7SW9SW8SW3SW3W4W5W4Calm
2 days agoN5NE10E11NE9NE10NE10N5N6NE5N5CalmSW13SW14SW14
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Tide / Current Tables for Noank, Mystic River entrance, Connecticut
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Noank
Click for Map
Fri -- 12:56 AM EST     0.31 feet Low Tide
Fri -- 03:58 AM EST     Moonset
Fri -- 06:50 AM EST     Sunrise
Fri -- 06:52 AM EST     2.59 feet High Tide
Fri -- 01:36 PM EST     0.18 feet Low Tide
Fri -- 03:08 PM EST     Moonrise
Fri -- 04:20 PM EST     Sunset
Fri -- 07:15 PM EST     2.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.30.51.11.62.12.52.62.42.11.71.20.60.30.20.511.51.92.121.81.51.1

Tide / Current Tables for The Race, Long Island Sound, New York Current (2) (expired 1993-12-31)
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The Race
Click for Map
Fri -- 12:20 AM EST     -2.97 knots Max Ebb
Fri -- 03:32 AM EST     0.00 knots Slack
Fri -- 03:58 AM EST     Moonset
Fri -- 06:26 AM EST     2.73 knots Max Flood
Fri -- 06:50 AM EST     Sunrise
Fri -- 09:19 AM EST     -0.01 knots Slack
Fri -- 12:44 PM EST     -3.47 knots Max Ebb
Fri -- 03:08 PM EST     Moonrise
Fri -- 04:09 PM EST     0.00 knots Slack
Fri -- 04:21 PM EST     Sunset
Fri -- 06:58 PM EST     2.59 knots Max Flood
Fri -- 09:48 PM EST     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.9-2.8-2-0.80.72.12.72.61.90.5-1-2.2-3.2-3.4-2.8-1.7-0.31.32.32.62.31.2-0.3-1.5

Weather Map
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wmap_A
GEOS Local Image of    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
Ground Weather Radar Station Boston, MA
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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.