Monday, July13, 2020
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Marine Weather and Tides
Salem, MA

Version 3.4
NOTICE
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 5:17AMSunset 8:21PM Monday July 13, 2020 9:33 PM EDT (01:33 UTC) Moonrise 12:35AMMoonset 1:40PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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- 717 Pm Edt Mon Jul 13 2020
Tonight..S winds around 5 kt, becoming nw after midnight. Waves 1 foot or less. Showers with tstms likely this evening. Some tstms may produce gusty winds and heavy rainfall this evening.
Tue..NE winds 5 to 10 kt. Waves 1 foot or less, then around 2 ft in the afternoon. A chance of showers in the morning. Showers likely in the afternoon.
Tue night..NE winds around 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft. Patchy fog. A chance of showers in the evening with vsby 1 to 3 nm.
Wed..NE winds 5 to 10 kt. Waves around 2 ft in the morning, then 1 foot or less. Patchy fog in the morning.
Wed night..NE winds 5 to 10 kt. Waves 1 foot or less. Patchy fog after midnight with vsby 1 to 3 nm.
Thu..E winds 5 to 10 kt. Waves 1 foot or less. Patchy fog in the morning with vsby 1 to 3 nm.
Thu night..S winds 5 to 10 kt. Waves 1 foot or less.
Fri..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Fri night..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers in the evening.
Sat..SW winds around 5 kt. Waves 1 foot or less.
Sat night..SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog after midnight with vsby 1 to 3 nm. 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 717 Pm Edt Mon Jul 13 2020
Synopsis for massachusetts and rhode island coastal waters.. Small crafts will continue through Tuesday evening for rhode island's coast waters and waters south of block island, martha's vineyard, and nantucket. Additionally, a high surf advisory continues until 8 pm Tuesday. For Tuesday we can expect pop-up afternoon showers or a Thunderstorm. Then high pressure returns Wednesday and Thursday, providing fair weather. Sct'd showers and Thunderstorms return for Friday. 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 Salem, MA
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location: 42.53, -70.89     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 132250 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 650 PM EDT Mon Jul 13 2020

SYNOPSIS. Showers and thunderstorms diminish early tonight followed by another mild and muggy night. Breezy, cooler and less humid conditions on Tuesday with showers and scattered thunderstorms in the afternoon. High pressure then brings fair weather for Wednesday and Thursday. Scattered showers and thunderstorms return early Friday and Friday night. High pressure then bring rain-free but very warm weather for Saturday and Sunday. Another cold front may bring a few thunderstorms Monday.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/.

650 PM Update .

Showers/storms in NE MA and SE MA had dissipated by 640 PM. A couple of showers/storms were moving from Eastern NY into the Berkshires. Storms in NE CT were diminishing, and one storm south of Quabbin Res was moving east toward some lingering energy . 2000 J/Kg in Srn Worcester Co. Expect leftover convection to slowly diminish through early tonight.

The rest of the night will feature fair but humid air, with temperatures falling into the mid and upper 60s. Fog will linger along the coast, primarily near Cape Cod and the Islands.

Previous Update .

Thunderstorms coverage diminish into the evening with areas of fog developing along the coastal areas and interior fog-prone areas, especially over areas where rain has fallen. Fog coverage will also hinge on the extent to which boundary layer winds decouple. We also cannot rule out some isolated showers but it should be a mostly dry night for most locations. The Berkshires East Slopes will see the coolest readings with overnight lows in the upper 50s to low 60s thanks to dew points falling into the upper 50s. As for most of us away from the interior high terrain, another muggy and mild night is in store with lows bottoming out in the mid 60s.

SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/. Tuesday .

* Much cooler day than of late with scattered thunderstorms in the afternoon.

572 Dm closed low slides east over VT/NH, surface low slides offshore into Gulf of Maine. This reinforces onshore flow from the northeast over Eastern MA and RI, and northerly flow over the interior. Lobe of vorticity traversing the area will lead to showers and scattered thunderstorms areawide. Best thunderstorm coverage looks to be in Central MA into Northern RI during the afternoon hours, which is far enough removed from the stabilizing effect of onshore flow and drier air from the cold air advection out in Western MA/CT. However, we have an impressive cold pool aloft with - 12 to -14C at 500mb. This is anomalously cold by mid July standards with only the 10th percentile according to NAEFS Situational Awareness Table. There may be some strong storms particularly over Central MA in the afternoon with CAM guidance showing 1000 J/kg of MLCAPE and good low-level lapse rates of up to 7.5C/km. But with dew points falling into the upper 50s to low 60s, not expecting severe weather, in line with SPC having our entire area in the general thunder category. Also expect plenty of diurnal cumulus with the anomalously strong cold air advection for mid-July standards in Southern New England. Overall, expect a considerably cooler day on Tuesday with highs generally in the mid 70s to mid 80s with mixing up to 850mb and 850mb temperatures are between +12 to +14C. People in Western MA/CT would feel particularly refreshing with dew points falling into the upper 50s by the afternoon hours.

Tuesday night .

Showers diminish into the overnight hours and temperatures will be much cooler than of late, with much of interior MA falling into the 50s. Enjoy!

LONG TERM /WEDNESDAY THROUGH MONDAY/. Big Picture .

Upper low moves offshore Wednesday morning. Upper ridge builds over New England during Wednesday and then moves offshore on Thursday. Shortwave in the Nrn Tier zonal flow crosses on Friday. Another ridge then builds overhead Saturday through next Monday.

Mid-July normals for 500-mb contours are around 580 Dm. Forecast values are in the mid 580s to low 590s through the period, so above normal temperatures are expected most of the period. Shallow surface east-northeast winds may undercut the deep warmth Wed-Thursday, especially in Eastern MA. But as those winds become south-southwest later week and and weekend that should trend back to above-normal temperatures.

Model mass fields are similar through Friday, with only minor differences over the weekend. Those differences are the usual ones dealing with shortwaves in a zonal flow. Confidence is moderate-high through through Monday.

Daily details .

Wednesday .

Upper low and cold pool from Tuesday will be moving off for the Maritimes Wednesday. But it remains close enough Wednesday morning that the cold pool instability may generate a few morning showers in Eastern MA. High pressure builds south from Nrn New England, bringing a low-level northeast flow through at least the Central Hills. Dew points in the mid 50s to low 60s will mean a comfortable day for most.

Models hint at some pcpn in Northwest MA in the afternoon/evening, but parameters are weak . forecast CAPE less than 100, LI at plus 4 . and leave that scenario less than credible. Mixing to 900-925 mb taps favorable temps for sfc max values in the 70s and low 80s. Low level east flow will keep the cooler temps in eastern MA.

Quiet weather Wednesday night with light wind and areas of fog.

Thursday .

High pressure remains along the coast and favors another dry day on Thursday. Overall a south-southeast surface flow with westerly winds aloft. GFS again hints at afternoon light pcpn in Northwest MA, but again the instability parameters are weak at best. Mixing to 850 mb taps 11-13C temps, so max sfc temps in the upper 70s to lower 80s, possibly a little cooler where the southeast wind is off the water.

Friday .

Upper shortwave moves east from the Great Lakes, driving a surface cold front east. Southwest upper jet increases during the day, with the right entrance to the jet moving over Srn New England. Lifted Index is forecast sub-zero Friday afternoon. PW values climb to between 1.5 and 2.0 inches. Will forecast scattered showers/tstms, some with local downpoours. Convection will linger into Friday night. The cold front is forecast to move through Friday night . expect the chance of convection to end after passage.

Saturday through Monday .

Upper ridge and surface high pressure build over Southern New England Saturday and Sunday. Expect dry weather over the weekend. Some signs of a shortwave forcing its way through the flow on Monday. A cold front works down from the north on Monday and may bring a few showers/thunder. Mixing up to 800 mb will tap 12-13C temps at that level, similar to 17-18C at 850 mb. Expect max sfc temps in the upper 80s and low 90s. Huidity levels will be high, with dew points 65 to 70 during the period . with heat index values in the low to mid 90s Sunday and Monday.

AVIATION /00Z TUESDAY THROUGH SATURDAY/. Forecaster Confidence Levels .

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

Tonight: Moderate confidence.

Showers and thunderstorms diminishing in coverage early in the night. Will see conditions across the interior improve to VFR, but not out of the question a few spot that had showers/storms see some patchy fog develop, especially in terminals in fog- prone areas such as KBAF and KBDL. Cape Cod and the Island terminals, especially KACK remaining IFR to LIFR in stratus and fog.

Tuesday: Moderate confidence.

VFR across the interior, but MVFR to LIFR across eastern coastal locations including BOS. Winds generally out of the north, but eastern coastal areas will see onshore flow.

Tuesday night: High confidence.

Mostly VFR conditions with northeast to northerly flow at 5 to 10 kt. Drier, cooler air advecting into the region should limit development of patchy fog and low clouds to the Eastern MA coast.

KBOS Terminal . Moderate confidence in TAF.

KBDL Terminal . Moderate confidence in TAF.

Outlook /Wednesday through Saturday/ .

Wednesday: Mainly VFR, with local MVFR possible.

Wednesday Night: Mainly VFR, with local IFR possible.

Thursday: VFR.

Thursday Night: Mainly VFR, with local IFR possible. Breezy. Chance SHRA.

Friday: Mainly MVFR, with areas VFR possible. Breezy. Chance SHRA, slight chance TSRA.

Friday Night: Mainly VFR, with areas IFR possible. Slight chance SHRA, isolated TSRA.

Saturday: VFR.

MARINE.

Small Craft Advisories remain in effect for all waters through Tue afternoon due to 5 ft seas over the outer southern waters.

A High Surf Advisory remains in effect for the Islands (including Block Island) until Tuesday evening for the south- facing beaches due to the rip current risk and breaking 4-6 ft waves in the surf zone.

Lower clouds and fog may again develop on the southern waters tonight. Scattered thunderstorms could develop on Tuesday afternoon. Winds turning from southwest to northwest and then northerly by Tuesday afternoon. North winds could gust up to 20 kts Tuesday afternoon into evening over the Eastern waters but stay below small craft criteria.

Outlook /Wednesday through Saturday/ .

Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers.

Wednesday Night: Winds less than 25 kt. Seas locally approaching 5 ft.

Thursday: Winds less than 25 kt.

Thursday Night: Winds less than 25 kt. Slight chance of rain showers.

Friday through Friday Night: Winds less than 25 kt. Chance of rain showers, slight chance of thunderstorms.

Saturday: Winds less than 25 kt.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . High Surf Advisory until 8 PM EDT Tuesday for MAZ023-024. RI . High Surf Advisory until 8 PM EDT Tuesday for RIZ008. MARINE . Small Craft Advisory until 8 PM EDT Tuesday for ANZ235-237-255- 256.

SYNOPSIS . WTB/Chai NEAR TERM . WTB/Loconto/Chai SHORT TERM . Chai LONG TERM . WTB AVIATION . WTB/Loconto/Chai MARINE . WTB/Chai HYDROLOGY .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 15 mi63 min 66°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 17 mi89 min SE 5.8 G 7.8 69°F 2 ft1006.1 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi43 min ESE 5.8 G 5.8 71°F 70°F2 ft1007.1 hPa (+0.6)71°F
IOSN3 - Isle of Shoals, NH 33 mi33 min ESE 4.1 G 4.1 71°F 1008.7 hPa (+1.6)71°F
BGXN3 - Great Bay Reserve, NH 37 mi108 min W 1.9 74°F 1008 hPa72°F
44073 39 mi149 min W 3.9 G 5.8 72°F 69°F
44098 - Jeffrey's Ledge, NH (160) 43 mi58 min 68°F3 ft
44018 - SE Cape Cod 30NM East of Nantucket, MA 45 mi43 min SSW 12 G 14 70°F 2 ft1008.6 hPa (+0.7)70°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beverly, Beverly Municipal Airport, MA4 mi40 minN 010.00 miFair71°F64°F81%1008.2 hPa
Boston, Logan International Airport, MA13 mi39 minN 010.00 miPartly Cloudy72°F66°F82%1009 hPa
Lawrence Municipal Airport, MA18 mi39 minSSW 410.00 miPartly Cloudy73°F70°F90%1009.3 hPa
Laurence G Hanscom Field Airport, MA22 mi42 minWNW 710.00 miThunderstorm74°F70°F88%1010 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
Mon -- 12:34 AM EDT     Moonrise
Mon -- 05:18 AM EDT     Sunrise
Mon -- 06:01 AM EDT     8.23 feet High Tide
Mon -- 12:05 PM EDT     1.38 feet Low Tide
Mon -- 01:40 PM EDT     Moonset
Mon -- 06:30 PM EDT     8.54 feet High Tide
Mon -- 08:19 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.62.33.44.96.47.78.27.86.65.13.52.11.41.82.94.35.97.58.48.47.66.24.73

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Mon -- 12:34 AM EDT     Moonrise
Mon -- 01:05 AM EDT     0.00 knots Slack
Mon -- 04:25 AM EDT     0.32 knots Max Flood
Mon -- 05:18 AM EDT     Sunrise
Mon -- 06:57 AM EDT     -0.00 knots Slack
Mon -- 11:28 AM EDT     -0.32 knots Max Ebb
Mon -- 01:24 PM EDT     0.00 knots Slack
Mon -- 01:39 PM EDT     Moonset
Mon -- 04:47 PM EDT     0.35 knots Max Flood
Mon -- 07:25 PM EDT     -0.00 knots Slack
Mon -- 08:19 PM EDT     Sunset
Mon -- 11:57 PM EDT     -0.35 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-00.20.30.30.30.2-0-0.1-0.2-0.3-0.3-0.3-0.10.20.30.30.30.30.1-0.1-0.2-0.3-0.3

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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Wind Forecast for Boston, MA (21,6,7,8)
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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 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.