Friday, February26, 2021
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Marine Weather and Tides
Hingham, MA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:21AMSunset 5:31PM Friday February 26, 2021 11:11 PM EST (04:11 UTC) Moonrise 5:46PMMoonset 7:24AM Illumination 100% Phase: Full Moon; Moon at 15 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ230 Boston Harbor- 1016 Pm Est Fri Feb 26 2021
Overnight..S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A slight chance of snow showers.
Sat..SE winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Gusts up to 25 kt. Waves 2 to 3 ft. Showers with snow showers likely. Vsby 1 to 3 nm.
Sat night..W winds 5 to 10 kt. Waves around 2 ft.
Sun..W winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less. A chance of rain.
Sun night..SE winds 5 to 10 kt, becoming S after midnight. Waves 1 foot or less. A chance of rain.
Mon and Mon night..NW winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft.
Tue through Wed night..SW winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance. 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 1016 Pm Est Fri Feb 26 2021
Synopsis for massachusetts and rhode island coastal waters.. High pressure begins to depart for the canadian maritimes overnight into Saturday morning. A broad low crosses the waters late on Saturday. A cold front will pass through the waters on Monday. High pressure builds in late on Tuesday into Wednesday. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo.


7 Day Forecast for Marine Location Near Hingham, MA
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location: 42.26, -70.89     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 270259 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 959 PM EST Fri Feb 26 2021

SYNOPSIS. High pressure slowly moves east of southern New England tonight. Mainly rain expected on Saturday as low pressure lifts through. Brief reprieve as high pressure builds in Saturday night. Rain returns Sunday into Monday, especially near the South Coast, as low pressure passes southeast of New England. Dry weather should prevail most of next week.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/.

10PM Update .

No changes were made to the previous forecast. High cirrus that had overspread the area will break around midnight before mid and low level clouds approach on the leading edge of the incoming precipitation shield. Temperatures appear to be bottoming out at this hour, but as expected, will slowly increase overnight due to southerly/southwesterly flow, 850 mb WAA, and increasing cloud cover. S/SW will pick up in intensity through sunrise.

An associated upper-level ridge axis on the heels of a departing high pressure system builds eastward ahead of a couple of short- wave troughs set to propagate over the northeast overnight.

The aforementioned shortwaves will be responsible for 2 weak surface low-pressure systems. The primary surface low, which will be moving ENE over the Great Lakes will produce a short period of snowfall along a surface warm front for the western zones before sunrise.

SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/. Highlights

* Snow early across many areas on Saturday, but quickly transitions to all rain.

* Southern New England dries out Saturday night

An upper-level shortwave trough and associated surface low will produce a brief period of snow for southern New England on Saturday morning. Currently not expecting more than a coating to an inch across some of the western zones before a quick transition to rain.

By mid-morning a 60 kt southerly low-level jet at 850 will rapidly usher in air too warm to support surface snow. With the strong WAA aloft, a low-level inversion will limit strong winds mixing down to the surface. Nonetheless, could still see gusts up to 30 mph over The Cape/Islands.

Expect all areas to transition to rain before noon-time. Currently expecting the south coast/Cape/Islands to see the heaviest precipitation as this is where forcing will be the strongest. This will be a fast moving system and is expected to be clear of the region by about 6-7 pm tomorrow.

West/northwest winds and drier air move in behind the surface low resulting in a brief period of clearing skies Saturday night before another weak low-pressure system consisting of primarily rain approaches southern New England on Sunday.

LONG TERM /SUNDAY THROUGH FRIDAY/. Highlights . * Rain Sunday-Monday, especially near South Coast. * Dry for most of next week - brief shot of colder air Tuesday. * High uncertainty regarding possible coastal low for end of week.

Overview:

Split flow is expected to dominate across CONUS through early next week before transition to mean trough over eastern third of country later in week. How we get to that eventual pattern is questionable, as models/ensembles show significant differences in timing and extent of upstream ridging (or even a closed low moving across southeast U.S. per 12z GFS). What this all means is we have good confidence in forecast through Wednesday, then much less confidence due to very high uncertainty Thu/Fri, more so than for a typical Day 6/7 forecast. I'll focus on a couple of details below:

Mon/Tue:

First system Sun/Mon tracks through Great Lakes while a weaker secondary low should pass SE of New England. What dynamics are available are focused near South Coast, so that's where best chance of seeing rain is (although we can't rule it out elsewhere as cold front moves through). We should get a quick shot of colder air behind system Tue, but that will be short lived as upper flow flattens for a time.

Thu/Fri:

This is where uncertainty reigns supreme. Model/ensemble solutions are all over the place with regard to possible coastal low passing near or SE of New England. ECMWF and its ensembles show more clustering in time/space than does GFS and its ensembles, which is due to a more pronounced eastern U.S. trough (as opposed to a digging closed low on GFS pushing into southeastern states). As usual we're leaning on NBM guidance which means we will have no more than lower-end chance PoPs for South Coast. Temperature profiles suggest a rain/snow mix is possible, but probabilities for accumulating snow are pretty low and are focused on higher elevations, assuming precip can even get that far N.

AVIATION /03Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels.

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

High confidence in VFR conditions overnight. High clouds move in after midnight before low clouds overspread the region. A seabreeze that developed in Boston should subside by 02Z. Winds will shift southerly overnight.

Medium to high confidence for Saturday, VFR/MVFR to start, but conditions will deteriorate quickly to IFR as precipitation spreads in beginning shortly before 12Z. Should start off as snow for many locations, but quickly change over to rain through the morning hours. The only exception is across the higher terrain where snow lingers into the early afternoon before transitioning to rain. Conditions may deteriorate further to LIFR between 14Z and 18Z when the heaviest precipitation falls across the region. Conditions remain IFR after precipitation ends, improving to VFR Saturday night.

Areas of patchy dense fog likely Saturday across the interior due to melting of the existing snow pack. LLWS looks marginal, 40kts from the south at 2000ft. LLWS was not included in the most recent TAF update but may be considered in later amendments.

KBOS TAF . High confidence in TAF.

KBDL TAF . High confidence in TAF.

Outlook /Sunday through Wednesday/ .

Sunday: Mainly VFR, with local MVFR possible. Chance RA.

Sunday Night: Mainly VFR, with areas IFR possible. Chance RA.

Monday: VFR. Breezy.

Monday Night: VFR. Windy with gusts up to 35 kt.

Tuesday: VFR. Strong winds with local gusts up to 40 kt.

Tuesday Night: VFR. Breezy.

Wednesday: VFR. Slight chance RA.

MARINE. Gale warning for the outer Marine zones south and east of The Cape/Nantucket. Small craft advisory in effect for the remaining near-shore waters excluding Boston Harbor/Narragansett Bay

Tonight . High confidence

Increasing S/SE winds and gusts. Wave heights increase to 2-4 feet by sunrise as low-pressure approaches southern New England

Saturday . Moderate confidence

Strong low-level jet moves over the coastal waters on Saturday with an area of low-pressure. Expecting wind gusts from 25-35 kts over the coastal waters beginning as early as 15Z for the outer waters. Wave heights increase to 7-9 feet for the outer waters and 4-6 feet for the near-shore waters Saturday afternoon. Gusts settle down after sunset and wave-heights begin to subside early Sunday morning.

Outlook /Sunday through Wednesday/ .

Sunday through Monday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain.

Monday Night: Low risk for gale force winds with gusts up to 35 kt. Rough seas up to 13 ft.

Tuesday: Low risk for gale force winds with gusts up to 35 kt. Rough seas up to 14 ft.

Tuesday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas.

Wednesday: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain.

TIDES/COASTAL FLOODING. Tides are astronomically high Monday with Boston at 11.0 FT MLLW (12:36 PM), Nantucket 3.6 FT MLLW (12:02 PM), and Providence at 5.0 FT MLLW (9:23 AM). Current expectation is for a surge of less than one foot along the south coast, and perhaps around 1 foot along eastern MA coast, which would keep the total water level below the minor flood category for both coasts.

In addition, winds are expected to shift to the W/NW in the morning as a cold front moves offshore, lessening the potential along E MA coast. If front ends up slowing down, it's possible we could see minor splashover (sub-Coastal Flood Advisory level) along both coasts, but that seems to be a worst case scenario right now.

Doesn't appear to be a prolonged period of strong enough S/SE winds to build up seas offshore more than 4-5 FT, so beach erosion is not expected to be an issue right now either.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory from 10 AM to 7 PM EST Saturday for ANZ232>234. Small Craft Advisory from 10 AM Saturday to 1 AM EST Sunday for ANZ231-251. Small Craft Advisory from 10 AM Saturday to 7 PM EST Sunday for ANZ235-237-256. Gale Warning from 10 AM to 10 PM EST Saturday for ANZ250-254- 255.

SYNOPSIS . RM/JWD NEAR TERM . RM/KS SHORT TERM . RM LONG TERM . JWD AVIATION . RM/KS/JWD MARINE . RM/JWD TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 11 mi60 min 34°F 36°F1031.8 hPa
44013 - BOSTON 16 NM East of Boston, MA 14 mi42 min S 18 G 19 36°F 39°F1033.4 hPa29°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 25 mi68 min S 18 G 21 37°F 3 ft1032.3 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 40 mi32 min SSE 16 G 19 35°F 41°F1032.6 hPa27°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 41 mi54 min SE 7 G 8.9 37°F 1033.3 hPa
FOXR1 - 8454000 - Providence, RI 41 mi60 min S 1.9 G 4.1 36°F 37°F1033 hPa
FRVM3 - 8447386 - Fall River, MA 41 mi54 min 36°F 39°F1033.6 hPa
44090 42 mi46 min 38°F1 ft
FRXM3 42 mi54 min 36°F 29°F
PVDR1 42 mi54 min SSE 4.1 G 5.1 37°F 1033.4 hPa26°F
CPTR1 - 8452944 - Conimicut Light, RI 45 mi54 min SSE 8 G 8.9 36°F 39°F1032.7 hPa
NAXR1 - Narragansett Bay Reserve, RI 49 mi87 min SW 4.1 36°F 1033 hPa29°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 49 mi54 min SW 5.1 G 8 37°F 1033.8 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA11 mi18 minS 1010.00 miMostly Cloudy32°F25°F75%1032.8 hPa
East Milton, MA12 mi21 minSSE 10 mi29°F25°F85%1033.1 hPa
Norwood, Norwood Memorial Airport, MA16 mi19 minSSW 310.00 miFair31°F22°F69%1032.9 hPa
Marshfield Airport, MA16 mi37 minSSE 610.00 miFair34°F28°F81%1033.2 hPa
Beverly, Beverly Municipal Airport, MA22 mi19 minSSE 410.00 miFair34°F26°F73%1032 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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Last 24hrW12W10W9W11W6W7W6NW7NW8NW65NW12
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Tide / Current Tables for Crow Point, Hingham Harbor entrance, Massachusetts
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Crow Point
Click for Map
Fri -- 04:12 AM EST     0.46 feet Low Tide
Fri -- 06:23 AM EST     Sunrise
Fri -- 06:23 AM EST     Moonset
Fri -- 10:23 AM EST     10.54 feet High Tide
Fri -- 04:46 PM EST     Moonrise
Fri -- 04:46 PM EST     -0.62 feet Low Tide
Fri -- 05:30 PM EST     Sunset
Fri -- 10:56 PM EST     9.64 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.55.63.51.50.50.92.64.87.19.310.410.396.94.31.8-0.1-0.60.52.44.87.299.6

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Fri -- 01:52 AM EST     -1.19 knots Max Ebb
Fri -- 04:14 AM EST     0.00 knots Slack
Fri -- 06:23 AM EST     Sunrise
Fri -- 06:24 AM EST     Moonset
Fri -- 07:12 AM EST     1.26 knots Max Flood
Fri -- 10:01 AM EST     -0.00 knots Slack
Fri -- 01:58 PM EST     -1.34 knots Max Ebb
Fri -- 04:40 PM EST     0.00 knots Slack
Fri -- 04:46 PM EST     Moonrise
Fri -- 05:30 PM EST     Sunset
Fri -- 07:40 PM EST     1.35 knots Max Flood
Fri -- 10:32 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1-1.1-1.2-1-0.20.71.21.31.20.70-0.6-1-1.3-1.3-1.2-0.70.31.11.31.31.10.4-0.3

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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 numerous 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.