|
Marine Weather and Tides
Version 3.4 |
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 5:56AM | Sunset 7:31PM | Friday August 23, 2019 6:16 PM EDT (22:16 UTC) | Moonrise 11:49PM | Moonset 1:38PM | Illumination 41% |  |
ANZ232 Nantucket Sound- 416 Pm Edt Fri Aug 23 2019
Tonight..N winds around 5 kt, increasing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Sat..NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft.
Sat night..NE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Seas 2 to 3 ft.
Sun..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Sun night through Mon night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Tue night..E winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Wed..E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. 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.
Tonight..N winds around 5 kt, increasing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Sat..NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft.
Sat night..NE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Gusts up to 20 kt. Seas 2 to 3 ft.
Sun..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Sun night through Mon night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Tue..E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Tue night..E winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Wed..E winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers. 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 416 Pm Edt Fri Aug 23 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres centered over the great lakes this evening will build east over quebec and northern new england tonight and Sat. The high will shift east toward the canadian maritimes Sun and linger there through mid week. A tropical depression is likely to form off the coast of florida early next week. The system may track close enough to effect the coastal waters by mid week with elevated seas. 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 centered over the great lakes this evening will build east over quebec and northern new england tonight and Sat. The high will shift east toward the canadian maritimes Sun and linger there through mid week. A tropical depression is likely to form off the coast of florida early next week. The system may track close enough to effect the coastal waters by mid week with elevated seas. 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 231954 afdbox area forecast discussion national weather service boston norton ma 354 pm edt Fri aug 23 2019 Synopsis Large high pressure over the great lakes will continue to transport drier and less humid air into new england and eventually a fall-like airmass this weekend. Expect mild afternoons and cool nights with dry weather Saturday followed by possibly a few showers Sunday especially eastern ma into ri, but a washout is not expected. High pressure settles over the canadian maritimes early next week supporting dry cool weather here along with breezy conditions across CAPE cod and the islands. Meanwhile we'll be watching a potential tropical system tracking from the bahamas to well south of new england early to middle of next week. Near term until 6 am Saturday morning 350 pm update... 1026 mb high over the great lakes continues to advect a dry airmass (dew pt down to 49 at bos) across the region. Very pleasant 330 pm conditions with temps in the 70s (81 at boston) and dew pts in the 50s. However a potent northern stream short wave over the eastern great lakes providing SW flow aloft across southern new england and streaming warm advection cloudiness over the area. In fact this short wave fairly potent and trying to develop a baroclinic leaf on satellite over eastern pa to southeast ny. However with frontal boundary well south of new england per offshore buoys all reporting northerly winds, next frontal wave tracks well south of new england with too much dry air over ct ri ma for any risk of rain. Thus dry weather prevails this evening and overnight. Fairly light nnw winds shift to nne after midnight. Very comfortable tonight with lows in the 50s regionwide, except low to mid 60s along the coast including city of boston and possibly providence too. But with dew pts in the 50s very comfortable. Short term 6 am Saturday morning through Saturday night 350 pm update ... Saturday ... 1025+ mb high over ontario advects eastward into quebec, providing a dry nne flow into southern new england. Expect highs in the 70s and dew pts in the upper 40s to lower 50s. Definitely a touch of early fall in the air. Cross sections reveal some cirrus and diurnal CU scu so expect a mix of Sun and clouds Saturday. Overall a real nice day by late aug standards. Saturday night ... northeast pressure gradient increases as frontal wave develops well south of new england but combines with 1030 mb high (yeah a sign of early fall) over the maritimes. Thus becoming breezy and with a surge of wind and moisture off the atlantic expecting scattered showers to come onshore especially toward Sunday morning and over eastern ma into ri. Remainder of the region should remain dry until Sunday. Long term Sunday through Friday 350 pm update ... highlights... * expect much cooler than normal temperatures Sunday and Monday especially along the east coast * onshore winds will bring spotty light rain or showers at times into mid week * temperatures return to near normal levels around mid week * another chance for showers late Wednesday into Thursday details... Sunday through Tuesday... this period of the forecast will feature mostly dry conditions with cooler than average temperatures throughout and comfortable humidity. Sunday we see the high over northern new england shift east a bit, bringing northerly winds around to the northeast. While most of the column is very dry, below 850mb moisture advection off the ocean will bring some low level cloud cover and light showers or drizzle. The only locations that should deal with this would be eastern ma into ri with clearer skies to further west. Not a washout by any means, but could see scattered drizzle. A tightening pressure gradient on the south end of the high will bring increasingly gusty northeast winds, especially on the southern waters and along the south coast where gusts will reach 25-30 mph. Those on the water will likely see increased seas as well. Temperatures are quite a bit below normal given h85 temps of 8c and onshore flow... Those along the east coast may not make it out of the 60s. Monday and Tuesday the inverted ridge of high pressure lingers over sne helping keep things dry while the mid level low moves out replaced by weak ridging. Mid level height rises and some drying at the low levels should keep us mostly precip free, but with lingering low mid level clouds each day. Onshore E NE flow continues throughout keeping the immediate east coast cooler. Highs remain in the low 70s, 5-10 degrees below average for late august. Comfortable humidity sticks around too, with dewpoints in the 50s to low 60s. As the high moves away the gradient relaxes and the gusty winds along the south coast should subside through the day Monday. Wednesday through Friday... high degree of uncertainty with how mid-late week plays out, dependent on the trajectory of two low pressure systems, including one potential tropical system currently in the early stages of development off the coast of florida which may pass sne somewhere off the coast around mid week. At this point confidence is increasing that we'll see temperatures moderating back toward normal by Wed thur into the 70s and 80s as a warm frontal boundary moves north. This, associated with a large low pressure system moving into the hudson bay area. Ahead of its cold front warm moist air is |
pulled up over the east coast Wednesday Thursday bringing rain and thunderstorm chances back to the forecast late Wednesday and Thursday. At this point the system off of florida looks to stay well offshore of sne, phasing with the passing trough over the maritimes by late week. This should limit any impacts in southern new england to potentially some higher surf and rough seas, but given that this is still 5-6 days out, much too soon to get into any details... Something we will be monitoring over the next week. Aviation 20z Friday through Wednesday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Saturday night ... Moderate confidence. 18z update ... tonight ... VFR and dry weather with light nnw winds. Saturday ... VFR with nnw winds becoming nne. Dry weather continues. Saturday night ... VFR to start but becoming MVFR from east to west as nne onshore flow increases up to 20 kt across eastern ma. Kbos terminal... High confidence in taf kbdl terminal... High confidence in taf. Outlook Sunday through Wednesday ... Moderate to high confidence. Sunday: mainlyVFR, with local MVFR possible. Breezy. Slight chance shra. Sunday night: mainlyVFR, with local MVFR possible. Breezy. Monday:VFR. Breezy. Monday night:VFR. Tuesday:VFR. Breezy. Tuesday night: mainlyVFR, with local MVFR possible. Breezy. Slight chance shra. Wednesday: mainlyVFR, with local MVFR possible. Slight chance shra, isolated tsra. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Saturday night ... High confidence. 350 pm update ... tonight ... large high pressure moves from the northern great lakes into ontario providing dry weather across the southern new england waters along with a modest nnw wind. Saturday ... large high pressure moves from ontario to quebec with modest nne winds but dry weather continues. Saturday night ... a series of weak waves of low pres develop off the mid atlc coast. This combines with strong 1030+ mb high pres over the maritimes to yield NE 20-30 kt across the southern new england waters. Strongest winds likely south of CAPE cod and the islands. Scattered showers may lower vsby at times. Outlook Sunday through Wednesday ... Moderate confidence. Sunday: low risk for small craft advisory winds with gusts up to 30 kt. Seas up to 5 ft. Slight chance of rain showers. Sunday night: low risk for small craft advisory winds with gusts up to 25 kt. Seas up to 5 ft. Monday: low risk for small craft advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers. Monday night through Tuesday night: winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers. Wednesday: winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers, isolated thunderstorms. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... None. Synopsis... Nocera bw near term... Nocera short term... Nocera long term... Bw aviation... Nocera bw marine... Nocera 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 | 27 min | N 7.8 G 12 | 73°F | 76°F | 1 ft | 61°F | |
| WAXM3 - Waquoit Bay Reserve, MA | 12 mi | 92 min | W 1.9 | 75°F | 1015 hPa | 66°F | ||
| 44090 | 15 mi | 47 min | 69°F | |||||
| BZBM3 - 8447930 - Woods Hole, MA | 20 mi | 47 min | 71°F | 74°F | 1014.3 hPa | |||
| NTKM3 - 8449130 - Nantucket Island, MA | 26 mi | 47 min | N 7 G 9.9 | 73°F | 77°F | 1014.6 hPa | ||
| 44018 - SE Cape Cod 30NM East of Nantucket, MA | 41 mi | 87 min | W 5.8 G 5.8 | 67°F | 2 ft | 1014.4 hPa (+0.7) | 63°F | |
| BUZM3 - Buzzards Bay, MA | 42 mi | 77 min | W 9.9 G 9.9 | 69°F | 1015.2 hPa (+0.4) | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 46 mi | 47 min | N 7 G 8 | 77°F | 1014.7 hPa | |||
| FRVM3 - 8447386 - Fall River, MA | 46 mi | 47 min | 75°F | 80°F | 1015 hPa | |||
| FRXM3 | 46 mi | 47 min | 75°F | 59°F |
Wind History for Nantucket Island, MA
(wind in knots) EDIT (on/off) Help| 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 | 2 PM | 3 PM | 4 PM | 5 PM | |
| Last 24hr | SW G12 | SW G11 | SW | SW G11 | SW G9 | SW G9 | W G9 | SW G10 | W G12 | NW G10 | SW | SW | W | N G5 | N G8 | N G11 | N G14 | N G11 | N | NW G9 | NW G8 | NW G8 | N G9 | N |
| 1 day ago | S G11 | S G11 | SW G11 | SW G12 | SW G13 | SW G12 | SW G14 | SW G12 | SW G13 | SW G13 | SW G8 | S G6 | S | S | SW | SW G6 | W G8 | SW G13 | SW G12 | SW G17 | SW G15 | SW G14 | SW G17 | SW G14 |
| 2 days ago | S | SW G6 | SE | S | SE G5 | S | S G7 | S G6 | S | S | S | S | S G6 | S | S G11 | S G10 | S G11 | S G11 | S G17 | S G9 | S G11 | S G16 | S G13 | SW G12 |
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 | 21 min | N 0 | 10.00 mi | Fair | 72°F | 60°F | 66% | 1014 hPa |
| Otis Air National Guard Base, MA | 11 mi | 92 min | N 5 | 10.00 mi | Fair | 73°F | 60°F | 65% | 1014.6 hPa |
| Chatham, Chatham Municipal Airport, MA | 18 mi | 25 min | Var 4 | 10.00 mi | Fair | 71°F | 61°F | 71% | 1014.8 hPa |
| Marthas Vineyard Airport, MA | 22 mi | 24 min | WSW 3 | 10.00 mi | Fair | 70°F | 64°F | 82% | 1014.4 hPa |
Link to 5 minute data for KHYA
Wind History from HYA (wind in knots)
| 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 | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | SW | SW | SW | SW | SW | W | NW | Calm | Calm | N | N | Calm | NW | N | N | NW | NW | NW | Calm | |||||
| 1 day ago | S G17 | SW | SW | SW G21 | SW | SW | SW | SW | S | SW | SW | SW | SW | SW G23 | SW G21 | SW | SW G20 | |||||||
| 2 days ago | S | SE | S | S | Calm | Calm | S | S | S | S | S | S G18 | S G18 | S G22 | S | SW G21 | S G20 |
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
Fri -- 05:57 AM EDT Sunrise
Fri -- 06:16 AM EDT 2.75 feet High Tide
Fri -- 10:58 AM EDT Last Quarter
Fri -- 11:57 AM EDT 0.28 feet Low Tide
Fri -- 01:37 PM EDT Moonset
Fri -- 06:34 PM EDT 2.98 feet High Tide
Fri -- 07:29 PM EDT Sunset
Fri -- 11:48 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 05:57 AM EDT Sunrise
Fri -- 06:16 AM EDT 2.75 feet High Tide
Fri -- 10:58 AM EDT Last Quarter
Fri -- 11:57 AM EDT 0.28 feet Low Tide
Fri -- 01:37 PM EDT Moonset
Fri -- 06:34 PM EDT 2.98 feet High Tide
Fri -- 07:29 PM EDT Sunset
Fri -- 11:48 PM EDT Moonrise
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 |
| 0.2 | 0.6 | 1.2 | 1.7 | 2.2 | 2.5 | 2.7 | 2.7 | 2.3 | 1.7 | 1 | 0.5 | 0.3 | 0.5 | 1.2 | 1.8 | 2.3 | 2.7 | 2.9 | 2.9 | 2.6 | 2.1 | 1.4 | 0.7 |
Tide / Current Tables for Cape Cod Canal, Massachusetts Current
EDIT (on/off) Help One Week of DataCape Cod Canal
Click for Map
Fri -- 03:26 AM EDT -0.11 knots Slack
Fri -- 05:58 AM EDT Sunrise
Fri -- 06:31 AM EDT -3.87 knots Max Ebb
Fri -- 09:25 AM EDT 0.17 knots Slack
Fri -- 10:58 AM EDT Last Quarter
Fri -- 12:23 PM EDT 3.66 knots Max Flood
Fri -- 01:39 PM EDT Moonset
Fri -- 03:51 PM EDT -0.12 knots Slack
Fri -- 06:58 PM EDT -3.86 knots Max Ebb
Fri -- 07:30 PM EDT Sunset
Fri -- 09:53 PM EDT 0.02 knots Slack
Fri -- 11:49 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 03:26 AM EDT -0.11 knots Slack
Fri -- 05:58 AM EDT Sunrise
Fri -- 06:31 AM EDT -3.87 knots Max Ebb
Fri -- 09:25 AM EDT 0.17 knots Slack
Fri -- 10:58 AM EDT Last Quarter
Fri -- 12:23 PM EDT 3.66 knots Max Flood
Fri -- 01:39 PM EDT Moonset
Fri -- 03:51 PM EDT -0.12 knots Slack
Fri -- 06:58 PM EDT -3.86 knots Max Ebb
Fri -- 07:30 PM EDT Sunset
Fri -- 09:53 PM EDT 0.02 knots Slack
Fri -- 11:49 PM EDT Moonrise
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 |
| 3.7 | 3.5 | 2.8 | 1.6 | -1.9 | -3.1 | -3.8 | -3.8 | -3.2 | -1.7 | 2 | 3.1 | 3.6 | 3.6 | 3.1 | 2.2 | -0.9 | -2.7 | -3.6 | -3.9 | -3.5 | -2.5 | 0.9 | 2.7 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES 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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Boston, MA (18,4,5,8)
(on/off) Help
Ground Weather Radar Station Boston, MA
(on/off) Help
Ad by Google
|
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. |