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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 5:05AM | Sunset 8:20PM | Wednesday June 20, 2018 9:27 AM EDT (13:27 UTC) | Moonrise 12:53PM | Moonset 12:57AM | Illumination 46% |  |
Marine Forecasts
EDIT (on/off) Help| ANZ232 Nantucket Sound- 716 Am Edt Wed Jun 20 2018 Today..SW winds around 5 kt, increasing to 5 to 10 kt this afternoon. Seas around 2 ft. Tonight..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft. A chance of showers. Thu..S winds 5 to 10 kt, becoming E in the afternoon. Seas 1 foot or less. Thu night..NE winds 5 to 10 kt. Seas 1 foot or less. Fri..E winds 5 to 10 kt. Seas 1 foot or less. Fri night..SE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Sat..SE winds 5 to 10 kt. Seas around 2 ft. Showers likely. Sat night..S winds 10 to 15 kt. Seas 2 to 4 ft. Showers likely. Sun..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Sun night..W winds 10 to 15 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 Jun 20 2018 Synopsis for massachusetts and rhode island coastal waters.. High pres builds across the waters early today will shift e. Low pres will pass S of long island late tonight, bringing showers and patchy fog from cape cod southward through early Thu. High pres returns with dry conditions on Fri. Low pres and an associated warm front will approach late Fri night, bringing showers Sat into Sat night. Showers may linger as a cold front approaches Sunday. 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 New Seabury, MA
Hourly EDIT Helplocation: 41.55, -70.48 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 201123 afdbox area forecast discussion national weather service boston norton ma 723 am edt Wed jun 20 2018 Synopsis Dry weather is expected today as high pressure builds across new england. Showers are likely tonight south of the mass pike as low pressure passes south of new england. High pressure from canada brings dry weather Thursday and Friday. A cold front them brings a chance of showers at times this weekend, followed by dry weather early next week. Near term until 6 pm this evening Only minor tweaks to the forecast this morning. Last several runs of the hrrr have been advertising a stronger seabreeze for a time later this morning into this afternoon. Given the light flow in place right now, the location of a high pressure moving offshore, and the past success of the hrrr dealing with the seabreeze, have included it in the forecast with this morning update. Definitely not the strongest signal, but one that makes sense given the synoptic pattern. Previous discussion... high pressure across ny state will push SE during the day, so expect light W winds to shift to SW during the afternoon. May see enough mixing across E coastal areas to see gusts up to around 20 kt this afternoon, mainly from boston north to cape ann. Clouds will increase during the afternoon as mid and upper level moisture starts to approach ahead of the next system. Expect seasonable temps today, up to the lower 80s across ne mass to the ct valley, though only in the mid 70s or so along s coastal areas with the onshore wind. Short term 6 pm this evening through 6 pm Thursday Tonight... 00z model suite remains in pretty good agreement with the approach of low pressure out of middle appalachians. Noted that the models are trending a bit further S with the low pres as the h5 long wave trough across the NE u.S. Into labrador and newfoundland tends to flatten at its base S of new england. The low moves off the nj coast around 09z or so with a rather sharp northern extent of the precip shield. Looks like the best chance for showers will occur across N ct ri into S coastal mass where likely pops are in the forecast. The higher QPF amounts area also suppressed to the s, so expect maybe 0.1 to 0.2 inches, possibly a bit higher on the islands. Looks like conditions should remain mainly dry, but can't rule out a few brief showers possibly as far N as the mass pike. Thursday... leftover showers along S coastal areas should push offshore by midday, though there is some timing issues amongst the model suite during this timeframe. Leaned toward the somewhat faster gfs ggem timing. Skies should become mostly clear during the afternoon, though a few clouds may linger across CAPE cod and the islands. It will be a cooler day on Thursday along the mass E coast as winds become e-ne by around midday or early afternoon. Temps there will only top off in the mid 60s to lower 70s, coolest on the outer CAPE and nantucket, ranging to the lower 80s across the ct valley. Long term Thursday night through Tuesday Highlights... * dry and seasonable on Friday * unsettled weather for this weekend * dry weather early next week overview... 20 00z guidance continues to show improved agreement in the mid level pattern from earlier cycles. This agreement still breaks down in some of the finer details Saturday night into Sunday, but not to the point where confidence is lost in the overall trends. High pressure should move offshore, opening the door for a low pressure to move through the great lakes into the saint lawrence valley. This trajectory will force both the warm and cold fronts of this system across southern new england sometime this weekend. At this time, expecting an increasing risk for showers late Friday night into Saturday, peaking about Saturday evening, then diminishing into Sunday. A secondary cold front should cause showers to linger later Sunday. This weekend still doesn't look like a washout. Another high pressure should return with dry weather early next week. Not seeing any major deviations from normal temperatures for this period. Perhaps a bit cooler than normal Saturday, depending upon timing of a warm front and amount of sunshine. Aviation 11z Wednesday through Sunday Forecaster confidence levels... low - less than 30 percent. |
Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Thursday ... High confidence. Today...VFR. May see brief MVFR vsbys in patchy fog INVOF kack through around 14z. Winds shift to w-sw up to around 10 kt inland, and 10-15 kt across E ma ri. Latest runs of the hrrr indicate local seabreezes from about 15z-20z. Timing may be a little off, but thinking a brief seabreeze will develop at spots until SW winds increase. May see gusts up to 20 kt on portions of CAPE cod after 20z or so. Tonight... MainlyVFR. May see brief MVFR vsbys in patchy fog along S coastal terminals around or after 04z. Scattered -shra move from w-e this evening S of the mass pike. Best chance across central and NE ct ri and S coastal mass with brief local MVFR cigs. W-sw winds gusting to 15-20 kt this evening across cape cod. Winds shift to light w-nw across the interior after 06z. Thursday...VFR. Any leftover -shra along S coastal areas move offshore by mid morning, though may linger until midday across cape cod and the islands. N-nw winds shift to e-ne by around midday, with some gusts to 20 kt along E coastal terminals possible. Kbos terminal... High confidence in taf. Moderate confidence on duration and timing of seabreeze. Kbdl terminal... High confidence in taf. Outlook Thursday night through Sunday ... Moderate confidence. Thursday night through Friday:VFR. Friday night:VFR. Slight chance shra. Saturday: mainlyVFR, with areas MVFR possible. Shra likely. Saturday night: mainlyVFR, with local ifr possible. Chance shra, isolated tsra. Sunday: mainlyVFR, with local MVFR possible. Chance shra. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Thursday ... High confidence. Today and tonight... Light W winds early today shift to sw, up to 15-20 kt on the eastern waters late today. May see gusts up to 25 kt late this afternoon into this evening on the eastern outer waters, where seas may briefly build up to 4 ft. Small craft advisory has been issued. Winds may gust up to 20 kt on the lower end of narragansett bay into buzzards bay with locally choppy seas this afternoon. Reduced visibility in showers and patchy fog tonight mainly across the south coastal waters. Thursday... N-nw winds early Thu will shift to e-ne by midday thu with gusts up to 20 kt possible. Leftover reduced visibility along S coastal waters through midday thu, then improving. Outlook Thursday night through Sunday ... Moderate confidence. Thursday night through Friday: winds less than 25 kt. Friday night: winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers. Saturday: winds less than 25 kt. Seas locally approaching 5 ft. Rain showers likely. Saturday night: winds less than 25 kt. Local rough seas. Rain showers likely, with isolated thunderstorms. Sunday: winds less than 25 kt. Areas of rough seas. Slight chance of rain showers. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... Small craft advisory from 4 pm this afternoon to 10 pm edt this evening for anz250. Synopsis... Belk evt near term... Belk evt short term... Evt long term... Belk aviation... Belk evt marine... Belk evt |
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 |
| WAXM3 - Waquoit Bay Reserve, MA | 3 mi | 103 min | Calm | 70°F | 1013 hPa | 60°F | ||
| BZBM3 - 8447930 - Woods Hole, MA | 10 mi | 40 min | 70°F | 65°F | 1013.1 hPa | |||
| 44020 - NANTUCKET SOUND | 11 mi | 38 min | SSE 1.9 G 1.9 | 66°F | 65°F | 1 ft | 1013 hPa | 59°F |
| 44090 | 22 mi | 28 min | 64°F | |||||
| NTKM3 - 8449130 - Nantucket Island, MA | 27 mi | 40 min | W 4.1 G 6 | 70°F | 68°F | 1013.1 hPa | ||
| BUZM3 - Buzzards Bay, MA | 31 mi | 88 min | N 4.1 G 4.1 | 63°F | 1013.7 hPa (+1.2) | |||
| FRXM3 | 38 mi | 40 min | 67°F | 55°F | ||||
| FRVM3 - 8447386 - Fall River, MA | 38 mi | 46 min | 67°F | 68°F | 1013.2 hPa | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 38 mi | 40 min | W 1.9 G 2.9 | 66°F | 1012.7 hPa | |||
| PRUR1 | 44 mi | 40 min | 70°F | 53°F | ||||
| NWPR1 - 8452660 - Newport, RI | 45 mi | 46 min | NW 4.1 G 5.1 | 67°F | 61°F | 1012.8 hPa | ||
| NAXR1 - Narragansett Bay Reserve, RI | 46 mi | 103 min | NE 5.1 | 69°F | 1013 hPa | 56°F | ||
| PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 46 mi | 46 min | NE 1 G 1.9 | 67°F | 1013 hPa | |||
| CPTR1 - 8452944 - Conimicut Light, RI | 47 mi | 40 min | SSW 1.9 G 2.9 | 66°F | 69°F | 1012.8 hPa | ||
| QPTR1 - 8454049 - Quonset Point, RI | 49 mi | 40 min | NNE 1.9 G 2.9 | 68°F | 67°F | 1013 hPa | ||
| 44018 - SE Cape Cod 30NM East of Nantucket, MA | 49 mi | 38 min | W 3.9 G 5.8 | 61°F | 1 ft | 1013 hPa (+1.0) | 57°F |
Wind History for Nantucket Island, MA
(wind in knots) EDIT (on/off) Help| 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 | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | N G9 | N G11 | N G14 | N G8 | NE | N | E | N G6 | N | SW | SW | SW G7 | W | W | W | W | W | W | W | -- | NW | SE | SW | W |
| 1 day ago | SW G19 | SW G19 | SW G20 | SW G19 | SW G19 | SW G17 | SW G19 | SW G21 | S G18 | SW G17 | SW G17 | SW G19 | SW G18 | SW G20 | SW G16 | SW G18 | SW G15 | SW G20 | SW G13 | SW G16 | SW G11 | SW G12 | W G11 | W G8 |
| 2 days ago | N | N | N | N | E | S | S | S G10 | SW G11 | SW G9 | SW G9 | SW G11 | SW G10 | SW G10 | SW G12 | SW G11 | SW G11 | SW G10 | SW G10 | SW G10 | SW G10 | SW G15 | SW G19 | SW G16 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Otis Air National Guard Base, MA | 8 mi | 33 min | S 4 | 10.00 mi | Fair | 72°F | 53°F | 53% | 1013.2 hPa |
| Marthas Vineyard Airport, MA | 12 mi | 35 min | WSW 7 | 10.00 mi | Fair | 71°F | 59°F | 66% | 1012.9 hPa |
| Hyannis, Barnstable Municipal-Boardman Airport, MA | 14 mi | 32 min | SSW 5 | 10.00 mi | Fair | 72°F | 52°F | 50% | 1012.7 hPa |
Wind History from FMH (wind in knots)
| 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 | -12 PM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | NW G16 | N G15 | N | N G36 | N G15 | N G16 | N | N | N | N | Calm | Calm | Calm | Calm | N | NW | Calm | Calm | Calm | Calm | Calm | Calm | SE | S |
| 1 day ago | SW G25 | SW G27 | SW G24 | SW G25 | SW G24 | SW G25 | SW G25 | SW G28 | SW G27 | SW G24 | SW G24 | SW G25 | SW G24 | SW G23 | SW G19 | SW G22 | SW G21 | SW G22 | SW | W G18 | W | NW | N G15 | N G16 |
| 2 days ago | Calm | SW | Calm | SE | SE | SE | SE | S | S | S | SW | SW | S | SW | S | SW | SW | SW | SW | SW | SW | SW | SW | SW G21 |
Tide / Current Tables for Succonnesset Point, Nantucket Sound, Massachusetts
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Succonnesset Point Click for Map Wed -- 12:57 AM EDT Moonset Wed -- 05:07 AM EDT Sunrise Wed -- 06:11 AM EDT 2.10 feet High Tide Wed -- 06:52 AM EDT First Quarter Wed -- 12:13 PM EDT -0.06 feet Low Tide Wed -- 12:52 PM EDT Moonrise Wed -- 06:53 PM EDT 2.04 feet High Tide Wed -- 08:19 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 |
| 0.1 | 0.3 | 0.6 | 1.1 | 1.5 | 1.9 | 2.1 | 2 | 1.7 | 1.2 | 0.7 | 0.2 | -0.1 | 0 | 0.3 | 0.7 | 1.2 | 1.6 | 1.9 | 2 | 1.9 | 1.5 | 1.1 | 0.6 |
Tide / Current Tables for Cape Cod Canal, Massachusetts Current
EDIT (on/off) Help One Week of Data| Cape Cod Canal Click for Map Wed -- 12:08 AM EDT 4.11 knots Max Flood Wed -- 12:57 AM EDT Moonset Wed -- 03:25 AM EDT -0.16 knots Slack Wed -- 05:07 AM EDT Sunrise Wed -- 06:24 AM EDT -4.62 knots Max Ebb Wed -- 06:52 AM EDT First Quarter Wed -- 09:37 AM EDT 0.20 knots Slack Wed -- 12:48 PM EDT 4.40 knots Max Flood Wed -- 12:53 PM EDT Moonrise Wed -- 04:17 PM EDT -0.20 knots Slack Wed -- 07:02 PM EDT -4.34 knots Max Ebb Wed -- 08:20 PM EDT Sunset Wed -- 10:13 PM EDT 0.19 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 |
| 4.1 | 3.9 | 3.3 | 2 | -2.4 | -3.9 | -4.6 | -4.5 | -3.8 | -2.4 | 1.9 | 3.5 | 4.2 | 4.4 | 4.1 | 3.4 | 1.7 | -2.7 | -4 | -4.3 | -4.1 | -3.2 | -1.4 | 2.6 |
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 Boston, MA (9,2,3,4)
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Ground Weather Radar Station Boston, MA
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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. |