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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 5:51AM | Sunset 7:44PM | Saturday August 17, 2019 7:45 PM EDT (23:45 UTC) | Moonrise 9:06PM | Moonset 7:39AM | Illumination 94% |  |
ANZ230 Boston Harbor- 716 Pm Edt Sat Aug 17 2019
Tonight..SE winds 5 to 10 kt, becoming S after midnight. Waves 1 foot or less. Patchy fog. A slight chance of showers with isolated tstms this evening. Vsby 1 nm or less after midnight.
Sun..S winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less. Patchy fog. Vsby 1 nm or less.
Sun night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms. Vsby 1 to 3 nm.
Mon..SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Mon night..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Tue..NW winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. A chance of showers.
Tue night..S winds around 5 kt. Waves 1 foot or less. A chance of showers.
Wed through Thu..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. Vsby 1 to 3 nm.
Thu night..W winds 5 to 10 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. 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..SE winds 5 to 10 kt, becoming S after midnight. Waves 1 foot or less. Patchy fog. A slight chance of showers with isolated tstms this evening. Vsby 1 nm or less after midnight.
Sun..S winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less. Patchy fog. Vsby 1 nm or less.
Sun night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms. Vsby 1 to 3 nm.
Mon..SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Mon night..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Tue..NW winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. A chance of showers.
Tue night..S winds around 5 kt. Waves 1 foot or less. A chance of showers.
Wed through Thu..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. Vsby 1 to 3 nm.
Thu night..W winds 5 to 10 kt. Waves 1 foot or less. Winds and waves higher in and near tstms. 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 Pm Edt Sat Aug 17 2019
Synopsis for massachusetts and rhode island coastal waters.. A weak ridge of high pressure across the region will result in light east to southeast into early Sunday. Most of Monday will see south to southwest winds ahead of an approaching cold front. The cold front will cross the waters Monday night to bring northwest winds for Tuesday. 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.. A weak ridge of high pressure across the region will result in light east to southeast into early Sunday. Most of Monday will see south to southwest winds ahead of an approaching cold front. The cold front will cross the waters Monday night to bring northwest winds for Tuesday. 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 Hull, MA
Hourly EDIT Helplocation: 42.32, -70.92 debug
Area Discussion for - Boston, MA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus61 kbox 172241 afdbox area forecast discussion national weather service boston norton ma 641 pm edt Sat aug 17 2019 Synopsis Very warm and humid conditions Sunday with an increasing risk for some showers and thunderstorms. These conditions continue through midweek, when a cold front will sweep through. Drier and not as warm late next week. Near term until 6 am Sunday morning 640 pm update... continuing to monitor t-storms moving eastward towards sne. Numerous thunderstorms were noted moving thru ny state and crossing into western new england early this evening, aided by a short wave, robust instability of 1000-2000 j kg, and effective wind shear of 30-40 kts. As the thunderstorms move eastward with respect to southern new england, they should diminish in intensity and coverage, though more robust convection will pass to our north. However, a few strong storms are possible over our far interior zones early this evening, and possibly an isolated severe, even as diurnal instability begins to wane, as shear in our area was still 30-35 kts. Have upped pops to likely over far western ma, tapering pops to the e. Cams showing diminishing coverage of convection in our area, still expect this to be the overall trend this evening. At 22-23z, with higher cloud deck out of the way, visible satellite imagery was showing the marine influenced stratus deck starting to work its way back inland from south coastal ri ct ma. This trend will continue this evening per previous forecast. 4 pm discussion follows... earlier strong t-storm with heavy rainfall has weakened over sw ri with just isolated showers in the interior. Mlcapes around 1000 j kg with 0-6km shear 25-30 kt so can't rule out widely scattered convection to further develop in the interior through the afternoon given marginal instability in place. However, best forcing is to the west assocd with the approaching shortwave. This is where a few strong to severe storms are possible through the afternoon. This shortwave expected to move across northern new eng this evening. Perhaps enough forcing for a few showers t-storms from new york state spilling into western new eng this evening as instability persists. And some of the hi-res cams indicate a line of weakening convection moving through western and interior ma before dissipating. Drier air aloft then moves in from the north so expect mainly dry conditions late tonight. Expect low clouds to redevelop across sne with patchy fog as well, especially near the coast. A mild and humid night with lows 65-70. Short term 6 am Sunday morning through Sunday night Sunday... warm sector airmass across sne with boundary layer winds turning sw. This will result in low clouds and patchy fog burning off and giving way to at least partial sunshine. 850 mb temps 17-18c which normally supports temps into the lower 90s, but mixing depth may fall short of 850 mb so will go a bit cooler with highs mid upper 80s with a few locations in ct valley possibly reaching 90. Cooler along the coast where sea breezes develop. Quite humid airmass with dewpoints into the lower 70s. Moderate instability develops in the afternoon with capes 1500-2000 j kg. While synoptic forcing is limited, enough instability to support scattered showers t-storms in the afternoon, mainly interior where best instability is located. Sunday night... expect scattered showers t-storms to linger into the evening as decent instability persists within a well defined theta-e ridge. Then convection diminishing overnight. Another warm and humid night with lows upper 60s to lower 70s. Patchy low clouds and fog may redevelop. Long term Monday through Saturday Guidance shows ridging over the southern usa, shifting to the SW us during wed-fri as a hudson bay trough deepens and extends southward into the eastern u.S. Sne remains under the influence of decent mid- level flow, steering a series of shortwaves in our direction thru mid-week. Exact timing is uncertain on the shortwaves passing thru, but with increased moisture, each will have the ability to produce some showers and possibly some thunderstorms to our area. A cold front pushes south towards into our area Monday night Tuesday. However there is model uncertainty on whether or not the front pushes south of sne, at least for a period of time, or if it stalls over our area. If the 12z NAM solution pans out, we could get a brief reprieve on shower potential during Tuesday. However because of the uncertainty, we will have a continued risk for showers and thunderstorms during this timeframe. The front should move back north of our area as a warm front during Tuesday night Wednesday, which will keep or bring back an unstable airmass over our area. Then as the upper trough deepens and pushes short wave energy thru the eastern great lakes region, a cold front will pass thru our area. The cold frontal passage should pass thru our area during thu. The approach and passage of this front will likely bring our greatest chance for showers and thunderstorms for the week. High pressure builds in from the west for fri-sat. The base of the upper trough may lag behind, which could keep a cold pool over new england on Friday. With much drier air in place, model QPF is |
lacking, and for now will continue with this dry forecast. By Saturday the upper trough should be to our east, with dry conditions prevailing. Until the cold front pushes east of our region on thu, it will be very warm and humid. Dewpoints will remain in the mid 60s to low 70s, with relief from the humidity thu-fri. With temperatures rising to around 90 degrees early next week, we may need heat advisories for a time. Aviation 00z Sunday through Thursday Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Sunday night ... Moderate confidence. Tonight... widespread ifr lifr CIGS developing this evening, originating along the southern coastline of ct ri ma, and spreading inland during the night. Areas of fog, especially near the coast. A few showers t-storms moving into western ma this evening before weakening. Sunday... ifr conditions improving toVFR by late morning, but slower improvement CAPE islands. Scattered showers t-storms developing in the afternoon, mainly interior with brief lower conditions. Sunday night... patchy MVFR ifr stratus and patchy fog may develop, especially near the coast. But low confidence in areal extent of lower cigs vsbys. Scattered evening showers t-storms possible. Kbos terminal... Moderate confidence in taf. Expect CIGS to drop to ifr tonight with risk of lifr cigs. Some fog but vsbys should remain AOA 2 miles. Kbdl terminal... Moderate confidence in taf. A period of ifr cigs expected later tonight. Outlook Monday through Thursday ... Moderate confidence. Monday:VFR. Chance shra, slight chance tsra. Monday night:VFR. Slight chance shra, isolated tsra. Tuesday:VFR. Chance shra, slight chance tsra. Tuesday night: mainlyVFR, with local ifr possible. Chance shra, slight chance tsra, patchy br. Wednesday:VFR. Chance shra, slight chance tsra. Wednesday night: mainlyVFR, with local ifr possible. Chance shra, slight chance tsra, patchy br. Thursday: mainlyVFR, with local MVFR possible. Chance shra, slight chance tsra. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Sunday night ... High confidence. Primary marine concern will be areas of fog and poor vsbys tonight into Sun morning and and possibly another round sun night. Generally light winds and seas through the period. Outlook Monday through Thursday ... Moderate confidence. Monday through Monday night: winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers, isolated thunderstorms. Tuesday: winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers, isolated thunderstorms. Tuesday night: winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers, slight chance of thunderstorms. Wednesday through Wednesday night: winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers, slight chance of thunderstorms. Thursday: winds less than 25 kt. Local rough seas. Chance of rain showers, slight chance of thunderstorms. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... None. Synopsis... Kjc nmb near term... Kjc nmb short term... Kjc long term... Nmb aviation... Kjc nmb marine... Kjc nmb |
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 |
| BHBM3 - 8443970 - Boston, MA | 7 mi | 52 min | 69°F | 1015.8 hPa | ||||
| 44013 - BOSTON 16 NM East of Boston, MA | 14 mi | 56 min | ESE 12 G 14 | 67°F | 67°F | 2 ft | 1014.6 hPa (-1.5) | 67°F |
| 44029 - Buoy A0102 - Mass. Bay/Stellwagen | 23 mi | 102 min | ESE 12 G 12 | 67°F | 2 ft | 1015.4 hPa | ||
| 44018 - SE Cape Cod 30NM East of Nantucket, MA | 42 mi | 56 min | ESE 12 G 12 | 66°F | 2 ft | 1016 hPa (-1.7) | 66°F | |
| FOXR1 - 8454000 - Providence, RI | 44 mi | 46 min | S 7 G 9.9 | 77°F | 74°F | 1015.4 hPa (-1.0) | ||
| FRVM3 - 8447386 - Fall River, MA | 44 mi | 52 min | 77°F | 77°F | 1015.9 hPa | |||
| BLTM3 - 8447387 - Borden Flats Light at Fall River, MA | 45 mi | 46 min | ESE 8.9 G 12 | 76°F | 1015.5 hPa (-1.2) | |||
| FRXM3 | 45 mi | 52 min | 77°F | 71°F | ||||
| 44090 | 46 mi | 46 min | 70°F | 1 ft | ||||
| CPTR1 - 8452944 - Conimicut Light, RI | 47 mi | 46 min | SE 8 G 11 | 75°F | 75°F | 1015.6 hPa (-1.1) | ||
| IOSN3 - Isle of Shoals, NH | 47 mi | 46 min | ESE 7 G 7 | 66°F | 1015.9 hPa (-0.8) | 66°F |
Wind History for Providence, RI
(wind in knots) EDIT (on/off) Help| 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 G14 | S G13 | S G10 | S G10 | S | S G11 | S G13 | SW G9 | SW | S | S | SE | SE | S | SE | SW G8 | S | S G12 | S | S G10 | S G10 | S G9 | S G12 | S G12 |
| 1 day ago | S G11 | S | S | S G11 | SE | SE | E | E | E G6 | E | NE | E | E | SE | SE G6 | S | SW | S | S | S G7 | S G12 | S G14 | S G17 | S |
| 2 days ago | E G12 | E | E | E | -- | E | E | NE | NE | NE | NE | NE G6 | E | NE | NE | E | E | E G6 | S | S G6 | S G10 | S G10 | S G13 | S G16 |
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 |
| Boston, Logan International Airport, MA | 7 mi | 2.9 hrs | ENE 9 | 10.00 mi | Mostly Cloudy | 71°F | 64°F | 81% | 1016 hPa |
| East Milton, MA | 13 mi | 2.8 hrs | Var 6 | mi | 77°F | 71°F | 82% | 1016.9 hPa | |
| Norwood, Norwood Memorial Airport, MA | 16 mi | 2.9 hrs | ESE 6 | 10.00 mi | Mostly Cloudy | 84°F | 70°F | 63% | 1015.5 hPa |
| Beverly, Beverly Municipal Airport, MA | 18 mi | 2.9 hrs | SE 9 | 10.00 mi | Partly Cloudy | 73°F | 66°F | 78% | 1016.3 hPa |
| Marshfield Airport, MA | 20 mi | 2.2 hrs | SE 8 | 10.00 mi | Fair | 75°F | 69°F | 83% | 1015.9 hPa |
| Laurence G Hanscom Field Airport, MA | 22 mi | 2.8 hrs | E 9 | 10.00 mi | Mostly Cloudy | 80°F | 68°F | 67% | 1016.6 hPa |
Link to 5 minute data for KBOS
Wind History from BOS (wind in knots)
| 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 | 7 PM | |
| Last 24hr | E | E | SE | Calm | SE | SE | SE | E | SE | SE | E | E | SE | SE | E | SE | E | E | E | E | E | E | E | E |
| 1 day ago | E | E | E | SE | Calm | Calm | Calm | Calm | Calm | NW | NE | NE | E | E | SE | SE | E | E | E | E | E | E | E | E |
| 2 days ago | SE | SE | E | NE | E | Calm | Calm | NE | NE | Calm | Calm | SE | E | E | NE | E | SE | SE | SE | E | E | E | E | E |
Tide / Current Tables for Lovell Island, The Narrows, Boston Harbor, Massachusetts
EDIT Weekend mode (on/off) (on/off) Help One Week of DataLovell Island
Click for Map
Sat -- 01:03 AM EDT 9.74 feet High Tide
Sat -- 05:52 AM EDT Sunrise
Sat -- 07:18 AM EDT 0.20 feet Low Tide
Sat -- 07:39 AM EDT Moonset
Sat -- 01:32 PM EDT 8.95 feet High Tide
Sat -- 07:28 PM EDT 0.77 feet Low Tide
Sat -- 07:42 PM EDT Sunset
Sat -- 09:06 PM EDT Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 01:03 AM EDT 9.74 feet High Tide
Sat -- 05:52 AM EDT Sunrise
Sat -- 07:18 AM EDT 0.20 feet Low Tide
Sat -- 07:39 AM EDT Moonset
Sat -- 01:32 PM EDT 8.95 feet High Tide
Sat -- 07:28 PM EDT 0.77 feet Low Tide
Sat -- 07:42 PM EDT Sunset
Sat -- 09:06 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 |
| 9.1 | 9.7 | 9.2 | 7.8 | 5.9 | 3.6 | 1.4 | 0.3 | 0.5 | 1.7 | 3.5 | 5.6 | 7.6 | 8.8 | 8.8 | 7.9 | 6.3 | 4.3 | 2.3 | 0.9 | 1 | 2.1 | 3.9 | 5.9 |
Tide / Current Tables for Boston Harbor, Massachusetts Current
EDIT (on/off) Help One Week of DataBoston Harbor
Click for Map
Sat -- 12:40 AM EDT -0.00 knots Slack
Sat -- 05:05 AM EDT -1.22 knots Max Ebb
Sat -- 05:52 AM EDT Sunrise
Sat -- 07:12 AM EDT 0.00 knots Slack
Sat -- 07:39 AM EDT Moonset
Sat -- 10:31 AM EDT 1.13 knots Max Flood
Sat -- 01:07 PM EDT -0.00 knots Slack
Sat -- 05:28 PM EDT -1.12 knots Max Ebb
Sat -- 07:33 PM EDT 0.00 knots Slack
Sat -- 07:42 PM EDT Sunset
Sat -- 09:06 PM EDT Moonrise
Sat -- 10:44 PM EDT 1.06 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 12:40 AM EDT -0.00 knots Slack
Sat -- 05:05 AM EDT -1.22 knots Max Ebb
Sat -- 05:52 AM EDT Sunrise
Sat -- 07:12 AM EDT 0.00 knots Slack
Sat -- 07:39 AM EDT Moonset
Sat -- 10:31 AM EDT 1.13 knots Max Flood
Sat -- 01:07 PM EDT -0.00 knots Slack
Sat -- 05:28 PM EDT -1.12 knots Max Ebb
Sat -- 07:33 PM EDT 0.00 knots Slack
Sat -- 07:42 PM EDT Sunset
Sat -- 09:06 PM EDT Moonrise
Sat -- 10:44 PM EDT 1.06 knots Max Flood
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 |
| 0.4 | -0.2 | -0.6 | -0.9 | -1.1 | -1.2 | -1 | -0.2 | 0.6 | 1 | 1.1 | 1.1 | 0.7 | 0.1 | -0.4 | -0.7 | -1 | -1.1 | -1.1 | -0.5 | 0.4 | 0.9 | 1 | 1 |
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Boston, MA (19,4,5,8)
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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. |