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Marine Weather and Tides
Version 3.4 |
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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. |
| Sunrise 5:15AM | Sunset 8:28PM | Monday June 18, 2018 12:59 PM EDT (16:59 UTC) | Moonrise 10:44AM | Moonset 12:00AM | Illumination 27% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 1038 Am Edt Mon Jun 18 2018 Today..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 1 ft or less, then around 2 ft this afternoon. Tonight..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 to 2 ft. Chance of showers and tstms. Vsby 1 to 3 nm. Tue..NW winds 5 to 10 kt. Seas 1 ft or less. Chance of showers in the morning. Tue night..NE winds 5 to 10 kt. Seas 1 ft or less. Wed..SE winds around 5 kt, becoming S in the afternoon. Seas 1 ft or less. Wed night..SW winds 5 to 10 kt, becoming E after midnight. Seas 1 ft or less. Chance of showers. Thu..NE winds 5 to 10 kt. Seas 1 ft or less. Thu night..E winds 5 to 10 kt, becoming ne after midnight. Seas 1 ft or less. Fri..NE winds around 5 kt, becoming se in the afternoon. Seas 1 ft or less. Fri night..SW winds 5 to 10 kt. Seas 1 ft or less. Winds and seas higher in and near tstms. | ANZ300 1038 Am Edt Mon Jun 18 2018 Synopsis for the long island waters and new york harbor.. A low pressure trough will set up to the west of the waters today, followed by a cold frontal passage from the north tonight. Weak high pressure will build in on Tuesday, then give way to another cold front pushing through on Wednesday. High pressure will build over the waters on Thursday, then slide offshore on Friday. |
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 181516 afdokx area forecast discussion national weather service new york ny 1116 am edt Mon jun 18 2018 Synopsis A trough of low pressure builds in to western portions of the tri-state today, followed by a cold front crossing the area tonight. Weak high pressure then builds in Tuesday and Tuesday night before giving way to another cold front pushing through the area Wednesday and Wednesday night. High pressure then builds over the area through Thursday night then slides offshore Friday and Friday night. Another frontal system impacts the area this weekend. Near term through tonight A small decrease in clouds was made in the gridded forecast database this morning with most observations within a few degrees agreement with forecast values for temperatures and dewpoints. The forecast overall remains on track. Wnw flow sets up aloft by this afternoon as the deep layered ridge axis sinks to the se. It should be dry this morning due to subsidence from the departing ridge. A weak 700-500 hpa shortwave trough moves into western areas this afternoon, as a pre- frontal trough sets up over the lower hudson valley and NE nj as well. The pre- frontal trough will enhance low level convergence to the W and N of nyc with the shortwave serving as a trigger to act on capes progged in this area of at least 1500 j kg and around 30-35 kt of 0-6 km bulk shear. Bulk richardson numbers are fairly high (generally greater than 70) so they do not support super cells and but favor the possibility of multi- cellular convection out ahead of the cold front. The NAM has been fairly consistent in indicating this potential over NE nj lower hudson valley late this afternoon early this evening over the past two nights. The latest convection allowing models (cams) are supporting this idea as well, but a few hours faster. The GFS is a bit slower than both the NAM and cams. Based on this, agree with SPC in assessing a marginal risk for severe thunderstorms over the lower hudson valley, but would think that the threat GOES a bit farther S into NE nj than they indicate. Any severe storms over the hudson valley could maintain themselves as they track into interior portions of s ct winchell, so there is a marginal severe threat there as well. If there is any severe weather this afternoon early evening in the threat area, it will be due to damaging wind gusts. After this first round of convection, there should be a lull, then there should be another round late tonight ahead of the cold front. There is some question as to how well this convection holds together as it moves into our marine dominated airmass, so have capped pops at chance. However, precipitable waters increase to around 2" this afternoon and remain high until the cold front moves through. As a result, there is the threat for locally heavy rainfall with both rounds of convection. Refer to the hydrology section of the afd for details. With the cmc-global being alone in wanting to linger precipitation into Tuesday, have opted for the faster timing of a non-cmc-global blend with the cold frontal precipitation. Highs today should be around 10-15 degrees above normal. With interior areas and most of nyc reaching the upper 80s to lower 90s and some pockets of mid 90s passable in NE nj and the lower hudson valley. It is this area that there is a high likelihood of heat indices reaching 100 degrees this afternoon. As a result, have continued the heat advisory from 15z to 00z for ne nj and the lower hudson valley. Elsewhere heat indices should top out in the 90s over the interior and most of nyc and in the 80s near the immediate coast. Lows tonight will run around 10 degrees above normal. |
There is a high risk of rip currents at atlantic beaches mainly this afternoon and evening. Short term Tuesday Nw flow at all levels will dry and clear things out fairly rapidly. Highs on Tuesday should be around 5 to 10 degrees above normal. It likely will be warmer at coastal areas on Tuesday than today, due to the lack of a seabreeze on Tuesday due to the nw flow. Long term Tuesday night through Sunday Nw flow aloft continues Tuesday night and with no shortwaves progged to move through the area, it should remain dry with minimal cloud cover. The flow flattens on Wednesday as a northern stream closed low builds into quebec. As it does so, a shortwave rotating around the base of this trough moves towards the area in the afternoon. This could bring some spotty showers to mainly western zones Wednesday afternoon. The axis of this cutoff low then crosses the area Wednesday night, brining more widespread showers to the entire area. In addition with showalter indices progged to go to the 0 to 4 range, have added a slight chance of thunder to the forecast as well. Precipitable waters return to around 1.75 to 2 by late Wednesday, so locally heavy rainfall could again be possible. See the hydrology section of the afd for details. Nw flow then returns to the region on the backside of the trough Thursday and Thursday night. With relatively dry low levels, both of these periods should remain dry. Deep layered ridging builds in Friday and Friday night, with associated subsidence keeping things dry. A mean trough builds into the NE for the upcoming weekend with unsettled weather the likely outcome - so should see a few rounds of showers and possibly some rumbles of thunder as well mainly from Saturday afternoon through Sunday. Temperatures Wednesday-Sunday should generally be within a few degrees of either side of normal. Aviation 15z Monday through Friday High pressure to the south will give way to an approaching cold front tonight. Stratus continues to advect up the coast today. Will likely hold right along the beachfront during the day light hours, but could see occasional sct MVFR clouds this afternoon. Will have to watch potential for it to come onshore at kisp or kgon with sct- bkn ifr CIGS this evening. Widely scattered tstms with brief MVFR ifr vsby and gusty winds are possible with a pre-frontal trough late today and early this evening, most likely from about 20z-22z at kswf, 21z-23z at khpn kbdr, 22z-01z at the nyc metro terminals, and 00z-02z at kisp. Since the expected coverage is scattered at most and not guaranteed to have direct terminal impacts, have continued to mention via vcts rather than prob30 tempo. Currently a low to moderate confidence forecast on development and timing. An additional round of showers isolated tstms possible with the front itself late tonight as it passes through. S-sw flow will increase today, with sustained winds 10-15 kt and gusts around 20 kt this afternoon and early evening. Sea breezes at kjfk klga kisp could be stronger, with sustained winds at or just over 15 kt and gusts approaching 25 kt. 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 |
| LDLC3 - New London Ledge CT - Ledge Light Weather | 19 mi | 50 min | SW 15 G 16 | 69°F | 1015.5 hPa | 62°F | ||
| NLNC3 - 8461490 - New London, CT | 20 mi | 42 min | SSW 8.9 G 15 | 80°F | 63°F | 1014.3 hPa | ||
| MTKN6 - 8510560 - Montauk, NY | 26 mi | 42 min | 71°F | 64°F | 1014.9 hPa | |||
| NWHC3 - 8465705 - New Haven, CT | 27 mi | 42 min | S 6 G 7 | 71°F | 66°F | 1014.5 hPa | ||
| 44017 - 23 Nautical Miles Southwest of Montauk Point, NY | 41 mi | 70 min | SSW 16 G 18 | 65°F | 62°F | 2 ft | 1015.9 hPa (-1.7) | 64°F |
| BRHC3 - 8467150 - Bridgeport, CT | 41 mi | 48 min | S 6 G 11 | 78°F | 62°F | 1013.8 hPa |
Wind History for New London, CT
(wind in knots) EDIT (on/off) Help| 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 | 5 AM | 6 AM | -12 PM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | |
| Last 24hr | S | S | S | S | S | S | S | S | S | SW | S | S | S | S | SW | S G6 | S | S | SW G11 | SW G13 | SW G15 | SW G16 | SW G13 | |
| 1 day ago | N G10 | W | SW G15 | SW G14 | W G15 | SW G13 | W G7 | SW G9 | SW | W G6 | W | NE | NW G5 | NW G6 | -- | -- | N | N | N G8 | N | N | N | SW G6 | S G9 |
| 2 days ago | E G10 | S G9 | S | S | S | S | S | S | SE | S | S | SW | W | NW | -- | -- | N | NW | N | N | SE | SE | N | 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 | 65 min | SW 10 G 18 | 10.00 mi | Fair | 82°F | 69°F | 66% | 1014.9 hPa |
| Groton / New London, Groton / New London Airport, CT | 21 mi | 64 min | SW 12 | 10.00 mi | Fair | 75°F | 66°F | 74% | 1014.2 hPa |
Wind History from SNC (wind in knots)
| 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 | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | |
| Last 24hr | Calm | SW | S | S | S G10 | S | S | S | S | S | SW | SW | SW | SW | SW | SW | SW | SW | SW | SW G15 | SW | S G17 | SW | S G17 |
| 1 day ago | NW | SW | SW G12 | SW | SW | SW | SW | W | SW | SW | SW | W | Calm | Calm | NW | N | N | N | NW | G10 | ||||
| 2 days ago | N | N G14 | N | NW | NW | NW | N | Calm | Calm | Calm | SW | Calm | Calm | W | W | W | NW | NW G13 | NW | N | N | N |
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 -- 02:40 AM EDT 4.53 feet High Tide Mon -- 05:15 AM EDT Sunrise Mon -- 09:03 AM EDT -0.28 feet Low Tide Mon -- 10:44 AM EDT Moonrise Mon -- 03:19 PM EDT 4.00 feet High Tide Mon -- 08:25 PM EDT Sunset Mon -- 09:24 PM EDT 0.33 feet Low Tide 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 |
| 3.2 | 4 | 4.4 | 4.5 | 4 | 3.2 | 2.2 | 1.2 | 0.2 | -0.3 | 0 | 0.9 | 2 | 2.9 | 3.6 | 4 | 3.9 | 3.3 | 2.6 | 1.8 | 1 | 0.4 | 0.4 | 1.1 |
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 -- 12:21 AM EDT 3.22 knots Max Flood Mon -- 03:37 AM EDT -0.00 knots Slack Mon -- 05:14 AM EDT Sunrise Mon -- 06:46 AM EDT -3.71 knots Max Ebb Mon -- 10:04 AM EDT 0.00 knots Slack Mon -- 10:42 AM EDT Moonrise Mon -- 12:56 PM EDT 3.21 knots Max Flood Mon -- 04:20 PM EDT -0.00 knots Slack Mon -- 07:18 PM EDT -3.28 knots Max Ebb Mon -- 08:23 PM EDT Sunset Mon -- 10:31 PM EDT 0.00 knots Slack 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 |
| 3.2 | 3 | 2.2 | 1 | -0.6 | -2.3 | -3.4 | -3.7 | -3 | -1.7 | -0.1 | 1.5 | 2.8 | 3.2 | 2.8 | 1.9 | 0.5 | -1.1 | -2.5 | -3.2 | -3.1 | -2.1 | -0.8 | 0.7 |
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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for New York City/Upton, NY (12,3,4,5)
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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. |