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Marine Weather and Tides
Version 3.4 |
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues. 6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. |
| Sunrise 5:56AM | Sunset 7:41PM | Monday April 23, 2018 10:49 PM EDT (02:49 UTC) | Moonrise 12:47PM | Moonset 2:30AM | Illumination 63% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 802 Pm Edt Mon Apr 23 2018 Tonight..SE winds around 5 kt. Seas 1 ft or less. Tue..SE winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 ft or less. Tue night..E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 ft or less, then 2 to 3 ft after midnight. Rain after midnight with vsby 1 to 3 nm. Wed..SE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Areas of fog. Vsby 1 to 3 nm. Wed night..SE winds 10 to 15 kt with gusts up to 20 kt, becoming sw after midnight. Seas 2 to 3 ft. Rain likely, mainly in the evening. Patchy fog. Vsby 1 to 3 nm. Thu..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Chance of rain in the morning. Thu night..W winds 5 to 10 kt. Seas subsiding to 1 ft or less. Fri..SW winds 5 to 10 kt. Seas 1 ft or less. Fri night..S winds 5 to 10 kt. Seas 1 ft or less. Sat..SW winds 5 to 10 kt. Seas 1 ft or less. Sat night..W winds around 10 kt. Seas 1 ft or less. | ANZ300 802 Pm Edt Mon Apr 23 2018 Synopsis for the long island waters and new york harbor.. High pressure tracks east across the western atlantic, while low pressure over the southern states works northward through the middle of the week. The low will lift across the area on Wednesday and Wednesday night, exiting to the north on Thursday. High pressure returns Thursday night with a wave of low pressure passing near the area on Friday and Friday night. A weak frontal system on then moves through on Saturday. |
7 Day Forecast for Marine Location Near Saybrook Manor, CT
Hourly EDIT Helplocation: 41.21, -72.41 debug
Area Discussion for - New York City/Upton, NY
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kokx 232355 cca afdokx area forecast discussion... Corrected national weather service new york ny 755 pm edt Mon apr 23 2018 Synopsis High pressure track east across the western atlantic, while low pressure over the southern states works northward through the middle of the week. The low will lift across the area on Wednesday and Wednesday night, exiting to the north on Thursday. High pressure returns Thursday night with a wave of low pressure passing near the area on Friday and Friday night. A weak frontal system on then moves through on Saturday followed by sprawling high pressure building in early next week. Near term until 6 am Tuesday morning Made minor changes this update to reflect the latest trends in observations and guidance. The forecast appears on track. Upper air pattern features a southern branch closed low working slowly east across the tennessee valley, and an upper ridge moving off the eastern seaboard. Conditions will remain dry and just below seasonable levels for overnight lows. Used a blend of the MOS with slight adjustments. High level cloudiness ahead of the low will very slowly work northeast. Depending on how fast the clouds and low level moisture come in could result in some locations cooling more quickly than others with some patchy fog as well. Short term 6 am Tuesday morning through Wednesday Models are in good overall agreement in taking low pressure over the tennessee valley northeast through Wednesday, taking the low near or just west of nyc late Wednesday. The ECMWF is on the slower side of the guidance. Clouds will overspread the area from the SW during the day with light overrunning rains developing from west to east in the evening and becoming steadier overnight. A strong low-level jet will enhance warm advection rains toward daybreak, with the possibility of a thunderstorm during the morning and afternoon hours. The coverage will diminish in the afternoon and may become more convective in nature. Instability aloft though is marginal and not surface-based. Rainfall totals will be highest from nyc and points north and west due to orographic enhancement with a modest SE flow. Gusts up to 30 mph will be possible along the coast. Amounts will range form 0.75 inches far eastern areas to 1.25 in the hills north and west of nyc. Should the upper trough become more negatively tilted than forecast, these amounts will likely need to be increased due to more offshore convection and warm conveyor belts rains working into the region highs on Tuesday will be a bit cooler due to the cloud cover and onshore flow, but will be milder Tuesday night for the same reason. Highs on Wednesday will be similar. |
Long term Wednesday night through Monday There are some differences in the upper pattern right out of the long term gate Wed night that continue through the remainder of the period. The general h5 flow consists of troughing over eastern north america giving way to western ridging during the second half of the weekend or early next week. Models begin with differences in location of the upper low, ec cmc the slowest moving with the nam GFS the fastest. Given the scenario, have sided with the slower moving, and thus have pops continuing bust decreasing Wed night. A wave of low pres tracks through or near the nyc metro area Wed night with a temporary lull in winds during the eve. This combined with a s-se flow could keep areas of fog around into the eve, but since winds will be shifting to the s-sw, have only gone patchy attm. Elevated instability also appears to be present during the eve, although its marginal so have included schc thunder. A few areas of rain may linger into thu, especially across northern zones, otherwise dry weather returns into Fri with weak sfc ridging building in. A shortwave trough tracking through the plains midweek tracks through the SE states Thu and up the east coast on fri. All nwp, except the GFS keeps pcpn offshore, although 12z cmc and ec have trended westward. Pcpn remains east of the area, but is closer, thus have schc-chc pops in the forecast to account for this. High uncertainty with a potential frontal system impacting the area on sat. GFS is less amplified aloft, keeping energy associated with trough axis well to the N while cmc ec are sharper cut off at h5. Have gone with consensus for the time being with a schc-chc pops. Deep layered ridging then builds in behind this resulting in dry and warm weather into next week. Near to slightly above normal temps are expected through the period. Aviation 00z Tuesday through Saturday High pressure will continue move off the coast into Tuesday afternoon. Low pressure approaches from the southwest Tuesday night. Se-sse winds will diminish this evening and become light and variable outside of city terminals. Se winds increase on Tuesday to 10-15 kt. A few gusts 15 to 20 kt are possible in the late morning and afternoon. Winds back towards the E Tuesday evening. Vfr through 00z Wednesday with MVFR developing in -ra 00z-06z Wednesday. Ny metro enhanced aviation weather support... detailed information, including hourly TAF wind component fcsts, can be found at: http: |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| 44039 - Central Long Island Sound | 14 mi | 50 min | SSE 5.8 G 7.8 | 46°F | ||||
| LDLC3 - New London Ledge CT - Ledge Light Weather | 19 mi | 175 min | S 9.9 G 11 | 47°F | 37°F | |||
| NLNC3 - 8461490 - New London, CT | 20 mi | 50 min | SSW 4.1 G 6 | 47°F | 47°F | 1031.3 hPa (+0.0) | ||
| MTKN6 - 8510560 - Montauk, NY | 26 mi | 50 min | 45°F | 45°F | 1031.6 hPa (+0.3) | |||
| NWHC3 - 8465705 - New Haven, CT | 27 mi | 50 min | S 5.1 G 6 | 48°F | 50°F | 1031.6 hPa (+1.0) | ||
| 44017 - 23 Nautical Miles Southwest of Montauk Point, NY | 41 mi | 60 min | S 5.8 G 7.8 | 46°F | 44°F | 1 ft | 1032.1 hPa (+0.3) | 42°F |
| BRHC3 - 8467150 - Bridgeport, CT | 41 mi | 56 min | SSW 4.1 G 7 | 49°F | 47°F | 1030.7 hPa |
Wind History for New London, CT
(wind in knots) EDIT (on/off) Help| 11 PM | 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 | |
| Last 24hr | -- | -- | N | N | N | N | N | N G8 | N | N | N G7 | N | S | SW G11 | S G11 | S | S G12 | S G11 | SW G10 | S G12 | S G12 | S | S | S |
| 1 day ago | N G7 | N G8 | N | N | N | N | N | NW | N | N | NE | N G8 | N G9 | N G12 | N G14 | W G7 | SW G17 | SW G15 | SW G16 | SW G13 | SW G9 | W G6 | W | |
| 2 days ago | N G10 | N G4 | NW G8 | W | N | N G5 | N G5 | N | N | N G6 | N G8 | N G8 | W G14 | N G10 | W G9 | N G14 | NW G12 | NW G8 | SW G14 | SW | N G7 | NW | NW G7 | NW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Chester, Chester Airport, CT | 13 mi | 55 min | no data | 10.00 mi | Fair | 45°F | 33°F | 66% | 1031.2 hPa |
| Groton / New London, Groton / New London Airport, CT | 21 mi | 54 min | S 5 | 10.00 mi | Fair | 44°F | 41°F | 89% | 1031.3 hPa |
Wind History from SNC (wind in knots)
| 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 | |
| Last 24hr | W | W | Calm | Calm | N | N | N | N | N | NE | NE | E | Calm | S | S | S | S | S | S G14 | S | S | S | S | Calm |
| 1 day ago | NW | NW | NW | NW | NW | NW | Calm | NW | N | N | N | NW G17 | NW G17 | NW G16 | NW G17 | NW | NW | W G12 | S | SW | W | |||
| 2 days ago | NW G14 | NW | NW G13 | NW | NW | NW | NW | NW | NW | N | N | G14 | W G13 | NW G16 | NW | G18 | W G17 | W G17 | NW G18 | NW G21 | NW G15 | NW | NW | NW |
Tide / Current Tables for Saybrook Jetty, Connecticut River, Connecticut
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Saybrook Jetty Click for Map Mon -- 02:30 AM EDT Moonset Mon -- 05:22 AM EDT 3.96 feet High Tide Mon -- 05:57 AM EDT Sunrise Mon -- 11:45 AM EDT 0.00 feet Low Tide Mon -- 12:47 PM EDT Moonrise Mon -- 06:02 PM EDT 3.48 feet High Tide Mon -- 07:38 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.8 | 1.5 | 2.4 | 3.2 | 3.7 | 3.9 | 3.9 | 3.4 | 2.8 | 2 | 1.1 | 0.2 | 0 | 0.5 | 1.3 | 2.2 | 2.8 | 3.3 | 3.5 | 3.3 | 2.8 | 2.2 | 1.5 | 0.8 |
Tide / Current Tables for The Race, Long Island Sound, New York Current
EDIT (on/off) Help One Week of Data| The Race Click for Map Mon -- 12:05 AM EDT 0.01 knots Slack Mon -- 02:29 AM EDT Moonset Mon -- 02:57 AM EDT 2.60 knots Max Flood Mon -- 05:56 AM EDT Sunrise Mon -- 06:18 AM EDT -0.00 knots Slack Mon -- 09:27 AM EDT -3.08 knots Max Ebb Mon -- 12:46 PM EDT Moonrise Mon -- 12:49 PM EDT 0.00 knots Slack Mon -- 03:38 PM EDT 2.60 knots Max Flood Mon -- 07:03 PM EDT -0.01 knots Slack Mon -- 07:37 PM EDT Sunset Mon -- 10:01 PM EDT -2.81 knots Max Ebb Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| -0.1 | 1.2 | 2.2 | 2.6 | 2.3 | 1.5 | 0.4 | -1 | -2.2 | -3 | -3 | -2.2 | -1.1 | 0.3 | 1.6 | 2.4 | 2.6 | 2.1 | 1.3 | 0.1 | -1.3 | -2.4 | -2.8 | -2.5 |
Weather Map and Satellite Images
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GOES 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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for New York City/Upton, NY (22,6,7,8)
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Ground Weather Radar Station Upton, NY
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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 numerious 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. |