Wednesday, May27, 2020
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Marine Weather and Tides
Groton Long Point, CT

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 5:17AMSunset 8:13PM Wednesday May 27, 2020 7:27 AM EDT (11:27 UTC) Moonrise 9:30AMMoonset 12:00AM Illumination 28% 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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ANZ237 Block Island Sound- 716 Am Edt Wed May 27 2020
Today..S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog this morning with vsby 1 nm or less.
Tonight..S winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Vsby 1 nm or less.
Thu..S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. Vsby 1 to 3 nm.
Thu night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. A chance of rain. Vsby 1 to 3 nm.
Fri and Fri night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of showers.
Sat night..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Sun and Sun night..NW winds 5 to 10 kt. Seas 2 to 4 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 716 Am Edt Wed May 27 2020
Synopsis for massachusetts and rhode island coastal waters.. Areas of dense fog should lift by mid to late morning. High pressure will be in control through Thursday. By Thursday night, high pressure begins to move further east, with an increasing chance for showers. A cold front will bring scattered showers and Thunderstorms Friday into Saturday as it crosses the region. High pressure will build into the northeast over the weekend. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.


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 271007 AFDOKX

Area Forecast Discussion National Weather Service New York NY 607 AM EDT Wed May 27 2020

SYNOPSIS. Offshore high pressure will continue ridging across the area through Thursday. A slow moving cold front approaches Friday and moves through Saturday. High pressure returns Sunday into early next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Minor update to temps/dewpoints to better reflect current condition trends. Otherwise, fog has once again developed over the region. Intensity has mainly been patchy dense, so will continue to go with an SPS to highlight the threat. The fcst includes areas of dense fog wording however, to account for any sudden decrease in vis across the board thru sunrise.

The fog and stratus burn off gradually again today. A consensus of the models was used for timing. There remains the risk that areas along the immediate s coast do not burn off completely, especially today with the sly llvl flow beginning to increase.

A blend of the MET/MAV was used for temps, which seems to have a better handle along the coasts. The guidance is otherwise similar to the NBM.

There is a low rip current risk for today.

SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/. Sly llvl flow increases tngt as the entire pattern shifts slightly ewd. This looks to produce some llvl speed convergence and shallow lift as a result. This would favor the development of drizzle, and it looks like the NAM is hitting this hard. The GFS less so. Although the NAM tends to overdo llvl moisture, the moisture is already here, so this bias is minimized. Will fcst areas of fog and drizzle tngt and again Thu ngt as the setup remains virtually the same.

Overlaid on this backdrop of dz/fg is the upr wave currently off the SC coast, which is progged to pass w of the cwa on developing sw flow aloft. This could provide enough forcing to produce shwrs tngt, in addition to the otherwise expected drizzle. This feature was resolved similarly by the 12Z models. Pops were capped at chance however, as the very high pops in the model data may be contaminated by the likelihood of drizzle, which is technically a no pop event. Similar problem with pops for late Thu and Thu ngt as moisture transport vectors suggest additional priming of the airmass from the s, but no strong trigger. Kept pops at the chance category for the embedded shwrs, and went with coverage for the drizzle.

Temps followed the NBM closely, with clouds expected to remain locked in all day Thu attm yielding more uniform readings.

There is a moderate rip current risk on Thu.

LONG TERM /FRIDAY THROUGH TUESDAY/. A strong upper level ridge over the Western Atlantic slowly weakens and moves offshore into the weekend. A northern stream shortwave will traverses across the US and Canada border into Friday and then across New England this weekend. At the same time, a southern stream upper low over the southern Plains will slowly weaken and lift towards the eastern seaboard on Friday. The interactions of these two streams and how the Western Atlantic ridge breaks down will be key to the timing of potential unsettled weather Friday and Saturday.

The surface high and ridge break down further on Friday as the aforementioned northern stream shortwave approaches. This sends a slow moving cold front towards the area on Friday, with development of a pre-frontal trough near or just west of the area late Friday. Showers and thunderstorms are possible, especially north and west of NYC, late in the day and evening. The cold front slowly moves into the area Friday night. Loss of daytime heating should act to weaken any shower and thunderstorm activity.

The cold front may not fully move east of the area until late Saturday. The interactions of the southern and northern stream appear to be key to whether or not a wave develops along the front (GFS, GEFS), or if the deepest moisture and best lift end up offshore on Saturday (ECMWF, CMC). Despite some of the models showing little to no precipitation, have kept chance PoPs through the day. This is due to the actual cold front being slow to move east and lingering upper trough axis near the region.

Dry conditions return Saturday night as the front should be offshore. High pressure builds down out of Southern Canada for Sunday into early next week with dry conditions expected.

Warm and humid conditions will continue into Saturday. The warmest day will likely be Friday with highs away from the coast in the upper 70s and lower 80s. Temperatures Saturday are a bit challenging and could end up higher if the front is slow to clear the area and conditions are mainly dry. A return to temperatures slightly cooler than normal are forecast Sunday into next Tuesday with highs in the upper 60s and lower 70s. Humidity levels will be much lower during this time as well.

AVIATION /10Z WEDNESDAY THROUGH SUNDAY/. High pressure remains through today with a moist light onshore flow continuing.

Low stratus and fog moving in from SE to NW. Terminals such as KISP and KGON are forecast to have a longer time period at IFR or below while KSWF is forecast to have MVFR for a shorter period of time. IFR/LIFR conditions expected to improve to VFR/MVFR by late morning.

Winds will generally be SE-S at 5-10 kt through the TAF period. Some terminal winds will become light and variable at 5 kts or less into this morning.

OUTLOOK FOR 06Z THURSDAY THROUGH SUNDAY. Wednesday night-Thursday. More low stratus and fog. Wednesday has IFR conditions forecast with sub-IFR possible. Thursday probably a mix of IFR and MVFR. A chance of showers on Thursday. Thursday night. A chance of showers. Patchy fog. MVFR or lower possible. Friday. A chance of showers and thunderstorms. Patchy fog early. MVFR or lower possible. Friday night-Saturday night. MVFR possible. A chance of showers and thunderstorms Friday evening. A chance of showers late Friday night and Saturday with a slight chance of thunderstorms. A chance of showers Saturday evening. Sunday. Mainly VFR.

MARINE. Dense fog will continue to produce hazardous conditions this mrng, and the advy remains in effect for all waters. The fog will likely return tngt and again Thu. Winds and seas will remain blw sca lvls thru Thu.

More fog is possible Friday morning. Winds may increase ahead of a cold front on Friday and could come close to 20 kt on the ocean. Ocean seas also build to 5 to 6 ft. Winds should gradually weaken Friday night into Saturday, but 5 ft ocean seas may persist into the first half of the weekend. Winds and seas are then expected to remain below SCA levels late Saturday into Sunday.

HYDROLOGY. Showers are possible at times Thursday into Saturday. Some thunderstorms are also possible Friday into Saturday with a chance for minor urban and poor drainage flooding.

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 . Dense Fog Advisory until 11 AM EDT this morning for ANZ330-335- 338-340-345-350-353-355.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 5 mi47 min Calm G 1 56°F 1023.5 hPa56°F
NLNC3 - 8461490 - New London, CT 7 mi57 min SW 1.9 G 4.1 57°F 56°F1024.1 hPa
MTKN6 - 8510560 - Montauk, NY 17 mi57 min 56°F 54°F1024.4 hPa
QPTR1 - 8454049 - Quonset Point, RI 37 mi57 min WSW 4.1 G 5.1 58°F 60°F1024.5 hPa
NWPR1 - 8452660 - Newport, RI 38 mi57 min SSW 5.1 G 6 55°F 52°F1024.4 hPa
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 42 mi37 min SE 3.9 G 5.8 54°F 53°F3 ft1024.9 hPa54°F
NAXR1 - Narragansett Bay Reserve, RI 42 mi102 min SSW 1.9 56°F 1024 hPa56°F
PRUR1 42 mi105 min 64°F 64°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 42 mi57 min SW 4.1 G 6 57°F 1024.9 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi57 min 56°F 59°F1024.3 hPa
FOXR1 - 8454000 - Providence, RI 47 mi57 min S 6 G 8 59°F 60°F1024.2 hPa
PVDR1 47 mi57 min SSE 8.9 G 9.9 59°F 1024.3 hPa59°F
NWHC3 - 8465705 - New Haven, CT 49 mi57 min SSW 1.9 G 1.9 58°F 58°F1023.5 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 mi31 minN 02.00 miFog/Mist57°F55°F96%1024.2 hPa
Westerly, Westerly State Airport, RI11 mi34 minSW 31.50 miFog/Mist60°F55°F86%1024.5 hPa
Montauk, Montauk Airport, NY16 mi33 minN 0 mi57°F55°F96%1024.8 hPa
Block Island State Airport, RI23 mi31 minWSW 51.00 miFog/Mist56°F55°F100%1024.8 hPa

Link to 5 minute data for KGON

Wind History from GON (wind in knots)
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Last 24hrS3S4S6S6SW5S7S7S7SW6S6S5S6S4S5S5CalmNW4S4SW3SW3SW4SW3CalmCalm
1 day agoNE6NE8N5NE3S6SE10SE11SE9SE11SE11SE7E7SE3SE3SE3E3CalmCalmCalmCalmCalmSW3SW3S3
2 days agoNE9NE11NE9NE8NE11SE13SE15E17
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Tide / Current Tables for Noank, Mystic River entrance, Connecticut
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Noank
Click for Map
Wed -- 12:30 AM EDT     2.79 feet High Tide
Wed -- 05:19 AM EDT     Sunrise
Wed -- 07:58 AM EDT     0.22 feet Low Tide
Wed -- 09:30 AM EDT     Moonrise
Wed -- 01:23 PM EDT     2.16 feet High Tide
Wed -- 08:01 PM EDT     0.71 feet Low Tide
Wed -- 08:11 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.82.521.510.70.40.20.411.51.92.12.11.91.51.210.80.70.91.42

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
Wed -- 12:14 AM EDT     2.64 knots Max Flood
Wed -- 03:10 AM EDT     -0.01 knots Slack
Wed -- 05:20 AM EDT     Sunrise
Wed -- 06:38 AM EDT     -3.22 knots Max Ebb
Wed -- 09:30 AM EDT     Moonrise
Wed -- 09:59 AM EDT     0.01 knots Slack
Wed -- 12:48 PM EDT     2.66 knots Max Flood
Wed -- 03:52 PM EDT     -0.00 knots Slack
Wed -- 07:08 PM EDT     -2.68 knots Max Ebb
Wed -- 08:11 PM EDT     Sunset
Wed -- 10:12 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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2.62.41.50.2-1.3-2.6-3.1-3.2-2.6-1.401.32.32.62.11.1-0.2-1.6-2.4-2.7-2.5-1.5-0.20.9

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (7,2,3,4)
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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.