Saturday, April4, 2020
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Marine Weather and Tides
Salisbury, 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 6:17AMSunset 7:14PM Saturday April 4, 2020 10:34 AM EDT (14:34 UTC) Moonrise 2:58PMMoonset 4:43AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 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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ANZ251 Massachusetts Bay And Ipswich Bay- 1016 Am Edt Sat Apr 4 2020
.small craft advisory in effect through Sunday evening...
This afternoon..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 8 to 13 ft.
Tonight..NE winds 5 to 10 kt, becoming N after midnight. Seas 7 to 10 ft.
Sun..S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 5 to 8 ft.
Sun night..S winds 5 to 10 kt, becoming W after midnight. Seas 4 to 6 ft. A chance of showers.
Mon and Mon night..W winds 5 to 10 kt. Seas 3 to 5 ft.
Tue and Tue night..W winds 5 to 10 kt, becoming e. Seas 2 to 4 ft.
Wed and Wed night..E winds 5 to 10 kt, becoming se. Seas 3 to 5 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 1016 Am Edt Sat Apr 4 2020
Synopsis for massachusetts and rhode island coastal waters.. The powerful ocean storm will continue to move away from new eng with winds gradually diminishing this afternoon. Weak high pres builds over the waters tonight and Sun with light winds turning s, then a weak cold front will cross the waters late Sun night and early Mon. High pres returns Tue, then low pres may move into the waters Wed. 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 Salisbury, MA
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location: 42.81, -70.81     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 041147 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 747 AM EDT Sat Apr 4 2020

SYNOPSIS. As the large ocean storm continues to move farther offshore, diminishing wind and gradual improving conditions are expected today. A weak weather system and front will bring a few showers Sunday afternoon and night. High pressure will bring mainly dry conditions and mild temperatures Monday into Tuesday. Unsettled conditions will linger from the middle to latter portion of the week as a few weak, fast moving weather systems cross the region.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

730 AM Update .

Appears most of the showers across central and eastern areas have pushed slowly SE as they have dissipated. Still noting spotty reports of light rain and some drizzle as well. The main problem now are the low clouds and patchy fog that is lingering across central and E Mass into RI thanks the the continued NE wind flow off the ocean. Will probably see continued spotty rain or showers linger through late morning or midday.

Further inland, winds have backed to a more northerly direction especially across the CT valley where the cloud deck has increased to around 2000 feet. Short range models trying to bring the cloud deck up further across western areas during the afternoon. Something to keep an eye on.

Remainder of near term forecast in pretty good shape, but have updated to bring conditions current.

Previous Discussion .

Mid level ridge builds south across New Eng as the ocean storm moves offshore with very dry air above 700 mb. Some sunshine expected to develop in the CT valley and western MA this afternoon, but plenty of moisture below 850 mb will likely keep lower clouds across much of the eastern half of SNE today.

Gusty NE winds 25-35 mph along the coast this morning will diminish in the afternoon. High will range from low/mid 40s east coastal MA to low/mid 50s CT valley where some sunshine expected to develop.

See coastal flooding section below for details regarding potential for minor coastal flooding along east coastal MA during this morning's high tide.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/.

Tonight .

Weak high pres over the region tonight. But enough low level moisture along with increasing mid level moisture moving in from the west ahead of a shortwave will result in partly to mostly cloudy skies. Lows will range through the 30s.

Sunday .

The mid level shortwave will move over the ridge and into the New Eng Sun afternoon with the attendant weak cold front approaching from the west. Lots of low and mid level moisture present will result in mostly cloudy skies with a bit of sunshine possible across SE New Eng. Bulk of the shortwave energy will remain to the north where best chance of showers, but can't rule out a few showers spilling into interior MA and western CT in the afternoon. Developing S/SW flow will bring milder temps into SNE, with highs in the 50s to around 60 in the CT valley, but holding in the 40s Cape/Islands.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/.

Highlights .

* A weak disturbance and approaching cold front bring scattered light showers Sunday into Sunday night

* Expect dry and mild conditions Monday into Tuesday as high pressure pushes across

* Several weak weather systems will bring scattered precipitation at times from Wednesday into Friday

Details .

Sunday night .

As the mid level steering pattern becomes nearly zonal across the northern tier states by Sunday night, will see a weak short wave in this flow will push across. Will see scattered light rain or showers move across with a fast moving, weak cold front through the night. With the fast movement of this system, expect very light QPF amounts.

The last of the precipitation should push offshore during the pre dawn hours. SW winds will shift to W-NW, running at around 5 to 10 mph.

Monday through Tuesday .

A large high pres ridge, extending from eastern Canada southwest to the Appalachians into the interior SE U.S., will see dry conditions and light NW winds during the day Monday. The NW flow will take over aloft as well, bringing a deep dry layer across along with the subsidence thanks to the high pressure.

With nearly full sunshine for at least part of the day, along with H925 temps rising to +5C to +7C and offshore winds, should see surface temps reach the lower-mid 60s across the coastal plain and into the CT valley. Readings will remain cooler along the immediate coast and across the higher terrain.

The mid level ridge building from the western Great Lakes northward across Hudson Bay to the Arctic Circle will keep dry conditions and mild temperatures Monday night into Tuesday as H5 heights rise to around 550 to 555 dm. Skies will start off partly cloudy Monday, but mid and high clouds will push across the region overnight and will linger through Tuesday. Temps will remain mild overnight, with lows ranging from 35 to 40, coolest across the N central and W Mass hills.

Will start to see band of low level moisture push SE out of NW Canada into the Great Lakes and mid Atlc states during Tuesday, but the high pressure ridge across Quebec into the northeast will keep dry conditions in place. Light westerly winds will also bring mild temps, though a tad cooler with the high clouds streaming across. Highs will mainly be in the 50s, though could touch 60 in some spots across interior E Mass as well as the CT valley on Tuesday.

Tuesday night through Friday .

Confidence lowers during this timeframe with the continued progressive mid level steering flow continues, with widening model solution spread amongst the model members.

At this point, should see several weak systems cross the region, bringing scattered showers at times. However, exact timing and track of each wave as they cross the region still in question. May see the first low pass close to or S of the region sometime on Wed, while a second system may push across later Thu into Friday. With clouds and the potential for precip each day, should see temps run close to or a bit below seasonal levels.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels .

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

Today . Moderate confidence.

Widespread MVFR and areas of IFR through the morning, then gradual improvement during the afternoon, with CIGS lifting to VFR across the CT valley. CIGS will remain mainly MVFR across eastern/central Mass into RI. Spotty -SHRA across eastern MA/RI through midday, then dissipating. NE gusts 25-30 kt near the coast, diminishing in the afternoon.

Tonight and Sunday . High confidence. Mix of MVFR/VFR cigs. Light winds tonight, becoming S/SW near 10 kt during Sun. Local sea breezes developing.

KBOS Terminal . Moderate confidence in TAF.

KBDL Terminal . Moderate confidence in TAF.

Outlook /Sunday Night through Wednesday/ .

Sunday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA.

Monday: VFR. Breezy.

Monday Night through Tuesday: VFR.

Tuesday Night: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA.

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

MARINE.

Today . Winds will gradually diminish through the day as the low level jet weakens and moves to the south. Winds will drop below gale force from N to S this morning and below 20 kt by evening. Very rough seas gradually subsiding. Visibility restrictions in areas of fog which should gradually improve around midday across the near shore waters, then further offshore later in the day.

Tonight . Light winds but large easterly swells impact the eastern MA waters.

Sunday . Winds turn southerly with speeds below 15 kt. Easterly swell and rough seas continue over eastern MA waters.

Outlook /Sunday Night through Wednesday/ .

Sunday Night: Winds less than 25 kt. Areas of rough seas. Slight chance of rain showers.

Monday: Winds less than 25 kt. Local rough seas.

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

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

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. Chance of rain showers.

TIDES/COASTAL FLOODING.

Coastal Flood Advisories issued for east coastal MA and Nantucket for the morning high tide today which occurs 830-930 AM. Current storm surge at low tide around 2.5 to 2.8 ft but the surge expected to decrease to around 2 ft during high tide. Expected storm tide at Boston will be around 12.2 ft (FS 12.5 ft), and around 5.5 ft at Nantucket (FS 5 ft).

Seas 14-17 ft still present over the eastern MA waters and while they are diminishing, expect 12-15 ft seas at high tide. These are long period waves with E/NE swell directed toward the coast. The elevated storm tide combined with the wave energy will be sufficient for areas of minor coastal flooding along east coastal MA and Nantucket. Lower confidence for coastal flooding along Cape Cod Bay as waves here around 6 ft which may not be enough for much more than splash over.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . Coastal Flood Advisory until 10 AM EDT this morning for MAZ007- 015-016-019-022. Coastal Flood Advisory until 11 AM EDT this morning for MAZ024. RI . None. MARINE . Gale Warning until 10 AM EDT this morning for ANZ232-256. Gale Warning until 8 AM EDT this morning for ANZ231-233>235- 237-250-251. Small Craft Advisory until 2 PM EDT this afternoon for ANZ230. Small Craft Advisory until 3 PM EDT this afternoon for ANZ236. Gale Warning until noon EDT today for ANZ254-255.

SYNOPSIS . KJC/EVT NEAR TERM . KJC/EVT SHORT TERM . KJC LONG TERM . EVT AVIATION . KJC/EVT MARINE . KJC/EVT TIDES/COASTAL FLOODING .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 15 mi34 min NNE 16 G 19 40°F 1017.2 hPa (+1.7)37°F
CMLN3 19 mi150 min NNW 23 39°F 42°F
44073 20 mi90 min NNE 18 G 21 41°F 41°F
44013 - BOSTON 16 NM East of Boston, MA 33 mi44 min NNE 19 G 25 40°F 42°F13 ft1016.2 hPa (+2.0)37°F
44098 - Jeffrey's Ledge, NH (160) 34 mi26 min 42°F15 ft
BHBM3 - 8443970 - Boston, MA 34 mi58 min 41°F 43°F1016.6 hPa
WELM1 - 8419317 - Wells, ME 38 mi52 min NNE 8.9 G 14 44°F 42°F1017.9 hPa
WEXM1 - Wells Reserve, ME 39 mi34 min N 7 46°F 35°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lawrence Municipal Airport, MA17 mi40 minNE 810.00 miOvercast42°F36°F79%1018.4 hPa
Beverly, Beverly Municipal Airport, MA17 mi41 minNNE 1110.00 miOvercast41°F35°F79%1017.2 hPa
Pease Air Force Base / Portsmouth, NH19 mi98 minNNE 810.00 miMostly Cloudy43°F34°F72%1017.2 hPa

Link to 5 minute data for KBVY

Wind History from BVY (wind in knots)
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Tide / Current Tables for Merrimack River Entrance, Massachusetts
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Merrimack River Entrance
Click for Map
Sat -- 02:22 AM EDT     1.11 feet Low Tide
Sat -- 04:42 AM EDT     Moonset
Sat -- 06:19 AM EDT     Sunrise
Sat -- 08:33 AM EDT     8.90 feet High Tide
Sat -- 02:57 PM EDT     Moonrise
Sat -- 03:05 PM EDT     0.06 feet Low Tide
Sat -- 07:13 PM EDT     Sunset
Sat -- 09:16 PM EDT     8.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.41.91.21.32.23.95.97.78.88.886.44.32.20.70.10.51.83.867.68.48.17.1

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Sat -- 03:27 AM EDT     0.00 knots Slack
Sat -- 04:42 AM EDT     Moonset
Sat -- 06:19 AM EDT     Sunrise
Sat -- 07:22 AM EDT     1.47 knots Max Flood
Sat -- 09:34 AM EDT     -0.00 knots Slack
Sat -- 12:09 PM EDT     -1.42 knots Max Ebb
Sat -- 02:58 PM EDT     Moonrise
Sat -- 04:02 PM EDT     0.00 knots Slack
Sat -- 07:13 PM EDT     Sunset
Sat -- 07:52 PM EDT     1.63 knots Max Flood
Sat -- 10:10 PM EDT     -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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-1.2-1-0.7-0.30.51.11.31.41.30.6-0.4-1.1-1.4-1.3-1.1-0.8-00.81.31.51.61.20.2-0.7

Weather Map
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GEOS 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.
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Wind Forecast for Boston, MA (10,2,3,4)
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Ground Weather Radar Station Boston, MA
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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.