Friday, January22, 2021
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Marine Weather and Tides
Salem, MA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 7:04AMSunset 4:46PM Friday January 22, 2021 11:58 AM EST (16:58 UTC) Moonrise 12:57PMMoonset 2:34AM Illumination 69% Phase: Waxing Gibbous; Moon at 9 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 Am Est Fri Jan 22 2021
.gale watch in effect from Saturday afternoon through Sunday evening...
This afternoon..W winds 5 to 10 kt. Waves 1 foot or less. A slight chance of showers.
Tonight..NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Waves around 2 ft.
Sat..NW winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 3 ft.
Sat night..NW winds around 20 kt with gusts up to 30 kt. Waves 2 to 3 ft. Light freezing spray.
Sun..W winds around 20 kt with gusts up to 30 kt. Waves around 2 ft. Light freezing spray.
Sun night..NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Waves around 2 ft.
Mon..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Mon night and Tue..N winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft. A chance of snow. Vsby 1 to 3 nm.
Tue night..NW winds around 10 kt. Waves around 2 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 1016 Am Est Fri Jan 22 2021
Synopsis for massachusetts and rhode island coastal waters.. Weak high pres early today gives way to a cold front which crosses the waters later tonight. High pres builds in from the great lakes for the weekend, settling over the waters by Mon. 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 Salem, MA
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location: 42.53, -70.89     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 221516 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 1016 AM EST Fri Jan 22 2021

SYNOPSIS. Mild afternoon Friday will be followed by a strong cold frontal passage tomorrow night. This cold front will begin the transition to colder/blustery conditions for the weekend. A storm system may bring accumulating snow to parts of Southern New England around Monday night into Tuesday but will hinge on a favorable storm track. High pressure for midweek brings a return to dry and seasonably cooler weather. Another weather system passes well south of the region Thursday.

NEAR TERM /UNTIL 7 PM THIS EVENING/. 10 AM Update:

**Scattered, brief heavy snow showers or snow squalls possible north and west of I-95 late-afternoon into early evening**

Confidence has increasd that we'll see a few scattered snow- showers later this afternoon. On the large scale, there is some weak synoptic forcing for ascent in the form of Q-Vec convergece. On the meso-scale, 12Z soundings and model soundings have both revealed steep low level lapse rates between 6.5-7.5 dc/km. The biggest challenge for snow showers to develop will be lift at the surface. Meso-analysis suggests this forcing will come in the form of low-level convergence ahead of the cold front that will push through the region tonight. Confidence is further supported by latest hi- res guidance from the HREF members which continue to support scattered snow showers later this afternoon. Currently, the best chance for snow showers will be north and west of I-95 in MA. However, can't rule out snow showers for zones south of I-90.

Previous discussion:

A cold front is expected to move through southern New England this afternoon and evening. A surface low pressure and mid level cold pool remain to our north. While there will be several pulses of energy moving along the southern periphery of this cold pool, it is more along the lines of shear vorticity rather than a well-defined shortwave. Lapse rates look sufficient from this combination of synoptic features to warrant a mention of snow showers and flurries across the higher terrain of southern New England. Up to an inch of snow accumulation expected.

With the timing of the cold front expected to be later this afternoon, west to southwest winds should result in high temperatures 5-10 degrees above normal once more.

SHORT TERM /7 PM THIS EVENING THROUGH 6 PM SATURDAY/. Colder and drier air arrives behind a cold front tonight into Saturday. The core of a high pressure should remain to our west through Saturday. So while our region remains close enough to get enough subsidence to maintain mainly dry weather during this time, we are not quite close enough to not have to contend with gusty winds, especially Saturday as the presence of colder air generates gusty northwest flow.

Anticipating low temperatures to be near normal Saturday morning, but high temperatures to be below normal as cold air continues to arrive.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/. Highlights .

* Remains blustery/windy and colder Sat night into Sunday. Sub-zero wind chills Sat night in the interior, and single-digit wind chills in the urban areas. Temps below-normal.

* Gradual moderation to temps and slackening of winds Sunday night into Mon.

* Low pressure may brush areas south of the Mass Pike with a light- accumulating snow on Tues. All outcomes still on the table, including a larger hit or a miss, but those details will hinge on a storm track which remains less certain.

* Dry weather with near to below-average temps for midweek.

Details:

Saturday Night into Sunday:

Dry, but blustery and quite cold will be the theme for the remainder of the weekend.

925 mb temps on Sat night are around -12 to -16C, and only moderate to values around -8 to -12C on Sunday. This will support lows in the single digits to mid teens Sat nite, with highs Sunday in the mid 20s to around the freezing mark. However northerly winds will be quite robust given enhanced p-gradient from high pressure over the Appalachians and lower pressure over Nova Scotia/Canadian Maritimes region. This will produce below-zero wind chills on Sat night (5 to to 10 below in the Berkshires, and down to 5 below across most of Worcester, Tolland, northern Middlesex and western Essex Counties), with single digit above wind chills for the rest of Southern New England. Lowest wind chills during the day on Sunday around the single digits to low teens above zero. Certainly will want to put on the winter coats, hats and gloves if heading outside! Expecting wind gusts around 25-35 mph for most, though we may be approaching Advisory level gusts across eastern MA and Cape Cod Sat night into early on Sunday.

Sunday Night into Monday:

Still fairly chilly Sunday night, but winds/wind gusts will be slackening as high pressure settles over Southern New England. This will support more of a stronger radiational cooling setup, as 925 mb temps continue to gradually modify (around -6 to -9C). Given the radiational cooling potential, lows should be similar to Sat night, but lower wind speeds should lead to less of a wind chill.

High pressure remains established on Monday, supporting dry weather with rising 500 mb heights to our south and southwest associated with a prominent southeast CONUS ridge. Will see initially clear skies with clouds lowering and thickening later in the day from SW to NE. Highs range from the mid 20s Berkshires/northern Worcester Hills to the mid to upper 30s elsewhere.

Monday Night into Tuesday Night:

Primary low pressure area near the mid-MS Valley early Mon night lifts into the OH Valley/northern mid-Atlc; as it does so, it looks to transfer its energy to secondary coastal low development near the Chesapeake Bay area overnight into early Tues. This secondary low then takes over for Tues/Tues night, with most individual low centers across EPS/GEFS/GEPS ensembles keeping this secondary low mainly south of 40N latitude.

Recent trends in guidance have shown a northward trend to the precip shield associated with the primary low. This trend is significant enough where the potential for some minor snow accumulations now appears feasible at least for our southernmost areas on Tues. Looks like this northward shift is occurring due the strength of the southeast CONUS 500 mb ridge forcing the initiating shortwave trough to translate further north/northwest. However there remains a wide range of outcomes in the 00z guidance. A mostly-miss in the GFS, while the international guidance range from a light-accumulating snow (ECMWF) for areas south of the Mass Pike, to a plowable type snow (Canadian GEM) across a larger part of SNE. I do have some questions on how much QPF we can realize as well, given the energy transfer from primary to secondary development. Will focus PoPs in the late Mon nite to Tues/early Tues nite timeframe, while raising PoPs over NBM toward a lower Chance level near the NH/southern VT border tapering up to more solid chance (40%) toward CT and RI. Given these uncertainties, felt handling PoPs this way is the most prudent approach and later shifts can than up or downshift these as needed pending later/mesoscale guidance trends. System as a whole looks progressive and we are also (currently) pretty far-removed from both primary and secondary cyclones. Each of those factors may also tend to cut into any accumulations.

Wednesday into Thursday Night:

In the wake of the potential early-week system, high pressure then ridges southward Wed and looks to linger into Thurs night. This would support dry and seasonably chilly weather under northerly winds. The Canadian GEM does advertise another system that may brush our southern areas on Thurs, but the GFS/ECMWF are dry. Will maintain a dry forecast for this period.

AVIATION /15Z FRIDAY THROUGH TUESDAY/. Forecaster Confidence Levels.

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

12z TAF Update:

Today through Saturday: High confidence.

VFR. A cold front moves through this afternoon that may bring scattered snow showers or possible snow squalls (timing 19-00z). Best chance from ORH westward, that may briefly reduce visby to sub-IFR levels. Clearing to VFR tonight into Saturday.

SW winds become W today, then gusty NW flow up to 30 kt Saturday.

KBOS TAF . Moderate confidence in TAF. Isolated snow showers/squall possible 21-00z but not certain. Would bring brief IFR or lower visby.

KBDL TAF . High confidence in TAF. Scattered snow showers/squalls possible around 19-22z, with brief IFR or lower visby.

Outlook /Saturday Night through Tuesday/ .

Saturday: VFR. Windy with gusts up to 30 kt.

Saturday Night: VFR. Strong winds with areas of gusts up to 40 kt.

Sunday: VFR. Strong winds with gusts up to 40 kt.

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

Monday: VFR. Breezy.

Monday Night: Mainly VFR, with local IFR possible. Chance SN.

Tuesday: MVFR/IFR conditions possible. Breezy. Chance SN.

MARINE. A cold front will move across the waters this afternoon into this evening. Gusty west to northwest winds develop behind this cold front tonight into Saturday. Small Craft Advisories will be needed for a time. The air will be cold enough where there is a concern for freezing spray across most of the coastal waters late tonight into Saturday. Rough seas generally across the southern coastal waters today, but will develop farther north late tonight into Saturday.

Outlook /Saturday Night through Tuesday/ .

Saturday: Strong winds with gusts up to 35 kt. Areas of rough seas. Freezing spray.

Saturday Night: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 11 ft. Freezing spray.

Sunday: Strong winds with gusts up to 40 kt. Rough seas up to 11 ft. Freezing spray.

Sunday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Areas of rough seas. Freezing spray.

Monday: Winds less than 25 kt. Areas of seas approaching 5 ft.

Monday Night: Winds less than 25 kt. Seas locally approaching 5 ft. Chance of snow. Areas of visibility 1 to 3 nm.

Tuesday: Winds less than 25 kt. Seas up to 5 ft. Chance of snow. Visibility 1 to 3 nm.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Gale Watch from Saturday afternoon through Sunday evening for ANZ230>237-250-251-254>256. Small Craft Advisory from 11 PM this evening to 1 PM EST Saturday for ANZ231>234-250-251. Small Craft Advisory from 4 PM this afternoon to 1 PM EST Saturday for ANZ235-237. Small Craft Advisory until 1 PM EST Saturday for ANZ254>256.

SYNOPSIS . Belk/Loconto NEAR TERM . RM SHORT TERM . Belk LONG TERM . Loconto AVIATION . Belk/Loconto MARINE . Belk/Loconto


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 15 mi64 min 39°F 40°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 17 mi114 min N 7.8 G 12 36°F 1 ft1001.7 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi48 min W 9.7 G 14 38°F 43°F1003.2 hPa28°F
IOSN3 - Isle of Shoals, NH 33 mi58 min NNW 1.9 G 2.9 32°F 1002.4 hPa (+0.9)26°F
BGXN3 - Great Bay Reserve, NH 37 mi73 min W 2.9 32°F 1003 hPa25°F
44073 39 mi114 min NNW 5.8 G 7.8 34°F 42°F
CMLN3 39 mi174 min 43°F
44098 - Jeffrey's Ledge, NH (160) 42 mi62 min 44°F2 ft
44018 - SE Cape Cod 30NM East of Nantucket, MA 45 mi48 min WNW 9.7 G 14 38°F 43°F1001.6 hPa30°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beverly, Beverly Municipal Airport, MA4 mi65 minNW 710.00 miPartly Cloudy40°F25°F55%1002 hPa
Boston, Logan International Airport, MA13 mi64 minW 810.00 miPartly Cloudy38°F24°F57%1002.9 hPa
Lawrence Municipal Airport, MA18 mi64 minW 410.00 miPartly Cloudy36°F26°F67%1003.2 hPa
Laurence G Hanscom Field Airport, MA22 mi67 minW 610.00 miMostly Cloudy39°F26°F60%1004.1 hPa

Link to 5 minute data for KBVY

Wind History from BVY (wind in knots)
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Tide / Current Tables for Beverly, Massachusetts
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Beverly
Click for Map
Fri -- 01:33 AM EST     Moonset
Fri -- 06:03 AM EST     8.36 feet High Tide
Fri -- 07:06 AM EST     Sunrise
Fri -- 11:56 AM EST     Moonrise
Fri -- 12:19 PM EST     1.46 feet Low Tide
Fri -- 04:44 PM EST     Sunset
Fri -- 06:36 PM EST     7.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.72.43.656.67.98.486.95.53.92.41.51.72.43.54.96.47.37.46.85.74.32.9

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Fri -- 01:00 AM EST     0.00 knots Slack
Fri -- 01:33 AM EST     Moonset
Fri -- 04:29 AM EST     0.32 knots Max Flood
Fri -- 07:05 AM EST     Sunrise
Fri -- 07:10 AM EST     -0.00 knots Slack
Fri -- 11:35 AM EST     -0.36 knots Max Ebb
Fri -- 11:56 AM EST     Moonrise
Fri -- 01:37 PM EST     0.00 knots Slack
Fri -- 04:44 PM EST     Sunset
Fri -- 05:02 PM EST     0.30 knots Max Flood
Fri -- 07:46 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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-0.200.20.30.30.30.20-0.1-0.2-0.3-0.3-0.3-0.20.10.20.30.30.20.1-0-0.1-0.2-0.3

Weather Map
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wmap_A
GEOS 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.
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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.