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Marine Weather and Tides
Version 3.4 |
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. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:59AM | Sunset 5:51PM | Tuesday October 22, 2019 9:24 AM EDT (13:24 UTC) | Moonrise 12:01AM | Moonset 3:03PM | Illumination 35% |  |
ANZ232 Nantucket Sound- 716 Am Edt Tue Oct 22 2019
.small craft advisory in effect from 5 pm edt this afternoon through late tonight...
Today..NE winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. Patchy fog this afternoon. Showers likely this afternoon with vsby 1 to 3 nm.
Tonight..E winds 15 to 20 kt, becoming se 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft. Patchy fog. Showers. Vsby 1 nm or less.
Wed..SW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 3 ft. Patchy fog in the morning. Showers likely in the morning with vsby 1 nm or less.
Wed night..W winds 10 to 15 kt with gusts up to 20 kt, becoming nw 5 to 10 kt after midnight. Seas around 3 ft.
Thu..W winds 5 to 10 kt. Seas around 2 ft.
Thu night..SW winds 5 to 10 kt. Seas around 2 ft.
Fri..SW winds around 5 kt. Seas around 2 ft in the morning, then 1 foot or less.
Fri night..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Sat..NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the morning.
Sat night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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.
.small craft advisory in effect from 5 pm edt this afternoon through late tonight...
Today..NE winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft. Patchy fog this afternoon. Showers likely this afternoon with vsby 1 to 3 nm.
Tonight..E winds 15 to 20 kt, becoming se 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 4 ft. Patchy fog. Showers. Vsby 1 nm or less.
Wed..SW winds 10 to 15 kt, becoming W 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas around 3 ft. Patchy fog in the morning. Showers likely in the morning with vsby 1 nm or less.
Wed night..W winds 10 to 15 kt with gusts up to 20 kt, becoming nw 5 to 10 kt after midnight. Seas around 3 ft.
Thu..W winds 5 to 10 kt. Seas around 2 ft.
Thu night..SW winds 5 to 10 kt. Seas around 2 ft.
Fri..SW winds around 5 kt. Seas around 2 ft in the morning, then 1 foot or less.
Fri night..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Sat..NW winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the morning.
Sat night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 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 Tue Oct 22 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres over the maritimes moves farther offshore today. A cold front will then pass through tonight into Wed, bringing S winds along with a chance of rain. High pres and dry weather follow for the rest of this week. 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.
Synopsis for massachusetts and rhode island coastal waters.. High pres over the maritimes moves farther offshore today. A cold front will then pass through tonight into Wed, bringing S winds along with a chance of rain. High pres and dry weather follow for the rest of this week. 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 Barnstable Town, MA
Hourly EDIT Helplocation: 41.63, -70.31 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 221102 afdbox area forecast discussion national weather service boston norton ma 702 am edt Tue oct 22 2019 Synopsis Weak high pressure will bring dry weather this morning. Spotty light drizzle rain develops this afternoon, with more widespread rain tonight ahead of an approaching cold front. Behind this front, dry conditions and seasonable temperatures follow Wednesday afternoon into Friday. Another cold front may bring a some showers late Friday into early Saturday. High pressure builds in for most of next weekend before another chance of rain next week. Near term until 6 pm this evening 7 am update... cirrus and some low clouds which developed over central eastern ma and ri this morning have kept temperatures warmer than expected. Temperatures hover in the 40s for much of southern new england; 50s along the coast. Regional radar continues to show light returns, but much if not all of this is falling as virga given the very dry mid levels which will take some time to saturate. The most likely location to see appreciable precip first will be southeast ma by early afternoon where moist low level flow undercuts the drier mid levels. Expecting at least a little bit of sunshine to start the day, but it shouldn't last long as clouds continue to thicken and lower. Previous discussion... 22 00z guidance continued to advertise the idea of a very dry layer between 5-10 kft. This dry air will need to be overcome before rainfall can begin in earnest. This should take most of the day. Right now, am focused on two areas most likely to see rainfall during the afternoon. The first area will be towards southeast ma where onshore flow should result in lower clouds and some patchy drizzle. The other area will be along and west of the ct river, which may be in range of an approaching mid level shortwave and surface cold front. Clouds will limit sunshine into this afternoon. Below normal temperatures are expected. Short term 6 pm this evening through 6 pm Wednesday Tonight... Approaching mid level trough and upper jet combined with deepening moisture plume will result in an area of rain showers moving west to east ahead of a cold front. Most of the best dynamics still appear to be focused to our north. Have increased pops due to high confidence in measurable precipitation, however, expecting rainfall total to be under an inch through Wednesday morning region-wide. Lowest rainfall totals towards the south coast. Wednesday... High pressure builds in behind a cold front. Winds turn west. Decreasing clouds and becoming drier. Near normal temperatures. Long term Wednesday night through Monday Highlights... * dry and seasonable through Thursday * light showers possible late Friday into Saturday * dry latter half of the weekend before rain chances return next week Wednesday night through Thursday... looking at the synoptic pattern for this period we see a broad upper trough over the central eastern us centered around a hudson bay low, while ridging over the eastern pacific moves onshore along the west coast. By Wednesday night the latest lobe of energy rotating around main low has moved out bringing rising heights and building surface high pressure. This together with a very dry post frontal airmass will bring clear skies and dry weather well into Thursday. By Thursday afternoon wrap around mid level moisture may introduce some scattered mid high clouds but nothing significant. Most noticeable sensible weather would be some breezy winds as model soundings indicate a well mixed boundary layer tapping into the 25-30kt 850mb jet. Friday and Saturday... next chance of rain comes during this period, though still some question to the timing and extent. Increasing moisture ahead of an approaching shortwave trough will bring clouds on Friday, preceding rain chances Friday evening and especially overnight. Confidence remains on the low end given significant guidance disagreement on the weekend pattern... GFS continuing to dig deeper while the ec depicts a shallower, more transient wave. For now going with a blend of guidance, favoring the quicker solution; expecting to see showers move in around late Friday and linger through early to mid day Saturday. Seasonable temperatures Friday in the low 60s followed by a bit of a cool down, in the 50s on Saturday. Behind the rain high pressure builds in for cool, clear night Saturday. This may lead to some frost Sunday morning with lows in the 30s. Sunday and Monday... increasing model spread, substantial by late weekend, leads to decreased forecast confidence this late in the period. Seems to be good consensus that Sunday stands a better chance of being dry, while another frontal wave may bring rain back to the forecast to start the week. For now introducing rain chances during the overnight hours Sunday into early Monday. |
Aviation 12z Tuesday through Saturday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Wednesday ... 12z update... today... High confidence in trends, moderate confidence in timing. MainlyVFR to start except for some sites in eastern ma and ri where fog and low clouds have developed. These should be improving in the next two hours. CIGS trending to low- endVFR to MVFR through the morning towards the south coast, with areas of ifr this afternoon. Areas of drizzle and light rain develop this afternoon. E winds becoming brisk around 10 to 15 kts, gusts up to 20 kts especially along the shore. Tonight... High confidence. Widespread ifr lifr developing with period of rain moving west to east. Winds becoming SE and strengthening over the waters with 15 to 20 kts sustained, gusts up to 25 kts right up to the immediate shore. Wednesday... Mix of conditions ranging from ifr toVFR to start. BecomingVFR by afternoon. Kbos terminal... High confidence in TAF trends. Kbdl terminal... High confidence in TAF trends. Outlook Wednesday night through Saturday ... Moderate confidence. Wednesday night:VFR. Breezy. Thursday through Thursday night:VFR. Friday:VFR. Slight chance shra. Friday night:VFR. Chance shra. Saturday:VFR. Slight chance shra. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Wednesday ... persistent E NE winds up to 20 kt into this evening with some 25 kt gusts will result in building seas over the waters. S to se winds develop tonight ahead of a cold front, then become W on Wednesday. Vsbys reduced in rain and fog late today through tonight. Small craft advisories expanded into CAPE cod bay and nantucket sound for tonight, and also extended through Wednesday across the outer coastal waters. Outlook Wednesday night through Saturday ... Moderate confidence. Wednesday night: winds less than 25 kt. Local rough seas. Thursday through Thursday night: winds less than 25 kt. Areas of seas approaching 5 ft. Friday: winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers. Friday night: winds less than 25 kt. Chance of rain showers. Saturday: winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... Small craft advisory from 5 pm this afternoon to 4 am edt Wednesday for anz231-232. Small craft advisory until midnight edt tonight for anz235-237. Small craft advisory until 6 pm edt Wednesday for anz250- 254>256. Small craft advisory from 2 pm this afternoon to 6 pm edt Wednesday for anz251. Synopsis... Belk bw near term... Belk bw short term... Belk long term... Bw aviation... Belk bw marine... Belk bw |
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 |
| 44020 - NANTUCKET SOUND | 10 mi | 34 min | 57°F | 2 ft | ||||
| WAXM3 - Waquoit Bay Reserve, MA | 12 mi | 99 min | N 1 | 54°F | 1019 hPa | 53°F | ||
| 44090 | 15 mi | 54 min | 57°F | 1 ft | ||||
| BZBM3 - 8447930 - Woods Hole, MA | 20 mi | 54 min | 55°F | 59°F | 1019.8 hPa | |||
| NTKM3 - 8449130 - Nantucket Island, MA | 26 mi | 54 min | NE 7 G 11 | 56°F | 56°F | 1019.2 hPa | ||
| 44018 - SE Cape Cod 30NM East of Nantucket, MA | 41 mi | 34 min | ENE 9.7 G 14 | 55°F | 6 ft | 1020.7 hPa (+1.4) | 48°F | |
| BUZM3 - Buzzards Bay, MA | 42 mi | 84 min | NE 15 G 17 | 55°F | 1019.9 hPa (+0.6) | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 46 mi | 54 min | NE 8.9 G 11 | 52°F | 1020.3 hPa | |||
| FRVM3 - 8447386 - Fall River, MA | 46 mi | 54 min | 51°F | 58°F | 1020.6 hPa | |||
| FRXM3 | 46 mi | 54 min | 52°F | 50°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 | NE G19 | NE G18 | NE G19 | N G15 | NE G21 | N G16 | NE G19 | NE G15 | N G16 | NE G16 | NE G15 | NE G15 | NE G13 | NE G16 | NE G12 | NE G10 | NE G13 | NE G15 | NE G14 | NE G14 | NE G14 | NE G11 | NE G11 | NE |
| 1 day ago | S G8 | S G8 | SE G8 | S G9 | SE G7 | SE | SE | E | E | E | E G9 | E | E G10 | E G10 | E G11 | SE | E G12 | E | NE G14 | E G17 | NE G21 | NE G18 | NE G21 | NE G19 |
| 2 days ago | NW G12 | NW G12 | N G10 | NW | NW G12 | NW G11 | SW G14 | W G10 | SW | SW G6 | SW | W | W | SW | SW | -- | -- | -- | -- | -- | -- | S | S | SE |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Hyannis, Barnstable Municipal-Boardman Airport, MA | 4 mi | 88 min | NE 5 | 10.00 mi | Mostly Cloudy | 55°F | 51°F | 87% | 1019.3 hPa |
| Otis Air National Guard Base, MA | 11 mi | 34 min | ENE 10 | 10.00 mi | Overcast | 55°F | 51°F | 88% | 1020 hPa |
| Marthas Vineyard Airport, MA | 22 mi | 31 min | NE 9 | 10.00 mi | Overcast | 56°F | 52°F | 87% | 1019.5 hPa |
Link to 5 minute data for KHYA
Wind History from HYA (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 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | |
| Last 24hr | NE G16 | NE G21 | N | NE G20 | N G25 | N G23 | N G18 | NE | NE | NE | NE | N | N | N | N | N | NE | N | N | NE | NE | N | NE | NE |
| 1 day ago | SE | S | S | SE | SE | E | E | Calm | E | E | E | Calm | NE | NE | NE | NE | E | E | E | NE | NE | NE | NE | |
| 2 days ago | NW | NW | N | N | S | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm |
Tide / Current Tables for Hyannis Port, Nantucket Sound, Massachusetts
EDIT Weekend mode (on/off) (on/off) Help One Week of DataHyannis Port
Click for Map
Tue -- 12:00 AM EDT Moonrise
Tue -- 12:36 AM EDT -0.00 feet Low Tide
Tue -- 07:01 AM EDT Sunrise
Tue -- 07:20 AM EDT 2.84 feet High Tide
Tue -- 12:56 PM EDT 0.30 feet Low Tide
Tue -- 03:02 PM EDT Moonset
Tue -- 05:49 PM EDT Sunset
Tue -- 07:33 PM EDT 3.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:00 AM EDT Moonrise
Tue -- 12:36 AM EDT -0.00 feet Low Tide
Tue -- 07:01 AM EDT Sunrise
Tue -- 07:20 AM EDT 2.84 feet High Tide
Tue -- 12:56 PM EDT 0.30 feet Low Tide
Tue -- 03:02 PM EDT Moonset
Tue -- 05:49 PM EDT Sunset
Tue -- 07:33 PM EDT 3.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.1 | 0 | 0.5 | 1.1 | 1.6 | 2.1 | 2.6 | 2.8 | 2.8 | 2.4 | 1.8 | 1.1 | 0.5 | 0.3 | 0.6 | 1.2 | 1.8 | 2.3 | 2.8 | 3.1 | 3.1 | 2.8 | 2.2 | 1.4 |
Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
EDIT (on/off) Help One Week of DataPollock Rip Channel
Click for Map
Tue -- 12:58 AM EDT 1.81 knots Max Flood
Tue -- 04:35 AM EDT -0.00 knots Slack
Tue -- 06:59 AM EDT Sunrise
Tue -- 07:08 AM EDT -1.47 knots Max Ebb
Tue -- 10:20 AM EDT 0.00 knots Slack
Tue -- 01:32 PM EDT 1.49 knots Max Flood
Tue -- 03:01 PM EDT Moonset
Tue -- 04:51 PM EDT -0.00 knots Slack
Tue -- 05:48 PM EDT Sunset
Tue -- 07:29 PM EDT -1.52 knots Max Ebb
Tue -- 10:39 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:58 AM EDT 1.81 knots Max Flood
Tue -- 04:35 AM EDT -0.00 knots Slack
Tue -- 06:59 AM EDT Sunrise
Tue -- 07:08 AM EDT -1.47 knots Max Ebb
Tue -- 10:20 AM EDT 0.00 knots Slack
Tue -- 01:32 PM EDT 1.49 knots Max Flood
Tue -- 03:01 PM EDT Moonset
Tue -- 04:51 PM EDT -0.00 knots Slack
Tue -- 05:48 PM EDT Sunset
Tue -- 07:29 PM EDT -1.52 knots Max Ebb
Tue -- 10:39 PM EDT 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 1.6 | 1.8 | 1.7 | 1.3 | 0.5 | -0.4 | -1.2 | -1.5 | -1.3 | -0.9 | -0.2 | 0.5 | 1.1 | 1.5 | 1.5 | 1.2 | 0.7 | -0.1 | -1 | -1.5 | -1.5 | -1.1 | -0.5 | 0.3 |
Weather Map
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GEOS 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.
Link to Loop
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. |