Wednesday, April1, 2020
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Marine Weather and Tides
Ocean Bluff-Brant Rock, 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 6:23AMSunset 7:10PM Wednesday April 1, 2020 5:25 AM EDT (09:25 UTC) Moonrise 11:34AMMoonset 2:18AM Illumination 58% Phase: Waxing Gibbous; Moon at 8 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- 416 Am Edt Wed Apr 1 2020
.small craft advisory in effect through Thursday evening...
Today..N winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 25 kt. Seas 4 to 6 ft.
Tonight..N winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. A chance of rain.
Thu..N winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Patchy fog. Rain. Vsby 1 to 3 nm.
Thu night..N winds 20 to 25 kt with gusts up to 35 kt. Seas 8 to 11 ft. Patchy fog. Rain. Vsby 1 to 3 nm.
Fri..N winds 25 to 30 kt, becoming ne 20 to 25 kt in the afternoon. Seas 10 to 15 ft. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Fri night..NE winds 20 to 25 kt with gusts up to 35 kt. Seas 10 to 15 ft. Patchy fog. A chance of showers.
Sat..NE winds 15 to 20 kt with gusts up to 30 kt. Seas 9 to 14 ft.
Sat night..N winds 5 to 10 kt. Seas 7 to 10 ft.
Sun and Sun night..SE winds 5 to 10 kt, becoming sw. Seas 5 to 8 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 416 Am Edt Wed Apr 1 2020
Synopsis for massachusetts and rhode island coastal waters.. A gale center will track well south and east of the waters through tonight then become nearly stationary into Fri. The storm will bring gale force winds tonight into Fri. High pres will build over the waters during the weekend. 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 Ocean Bluff-Brant Rock, MA
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location: 42.15, -70.62     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 010853 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 453 AM EDT Wed Apr 1 2020

SYNOPSIS. Mainly dry and cool conditions today as northerly flow continues. A large ocean storm will track well southeast of New England tonight then stall into Friday. This storm will bring occasional rain to eastern and southeast New England, strong winds over the Cape/Islands and potential for minor coastal flooding along east coastal Massachusetts. Clouds will linger on Saturday with dry and cool conditions. Another fast moving, weak system will bring spotty showers Sunday afternoon into early Monday, followed by dry conditions and seasonable temperatures late Monday into Tuesday.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Strong ocean storm moves east off the NC coast today with deep moisture remaining to the south. However, as the storm deepens the western extent of the deep moisture plume may back into the Cape/Islands with risk for some light rain here late in the day. Otherwise, dry weather. N/NE flow will result in increasing low level moisture which will back in across eastern New Eng. This will bring lots of clouds to eastern MA into RI with more sunshine further to the west, especially into the CT valley. Another chilly day with temps several degrees below normal, ranging from lower 40s across eastern MA to near 50 in the CT valley. Strengthening N/NE flow as storm deepens to the south with gusts 25-30 mph developing this afternoon over the Cape/Islands.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/. Tonight .

Sub 980 mb low tracks well SE/E of the 40N/70W benchmark. However, large circulation with developing warm advection and deep moisture wrapping to the west will result in some light rain backing in across the Cape/Islands this evening and possibly into eastern MA overnight. Much of the rest of SNE expected to remain dry. Increasing N winds along the coast, with gusts 35-45 mph developing overnight outer Cape/ACK with 25-30 mph along the immediate coast.

Thursday .

Ocean storm expected to stall well east of the benchmark in response to strong downstream blocking over the north Atlantic. Deep moisture plume and a well defined TROWAL will rotate westward into New Eng. This will bring periods of rain to eastern MA which is expected to gradually push west through SNE in the afternoon. Low level temp profile warm enough to support rain in the higher elevations. Gusty northerly winds expected with gusts 35-45 mph Cape/Islands with a risk for 50 mph over ACK where wind advisories may be needed. 25-35 mph gusts expected elsewhere. Highs mostly in the 40s, to near 50 in the lower CT valley which will be dry into the afternoon.

Coastal flooding . There is a risk for minor coastal flooding at Nantucket Harbor for the Thu morning high tide. The astronomical tide is 3.3 ft. Gale force N winds may result in 2 ft storm surge which would bring the storm tide above the 5 ft flood stage. The evening high tide is less of a risk due to the astronomical tide being lower (2.5 ft).

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/.

Highlights .

* An area of rain will move onshore as an ocean low passes well south and east of the region through early Saturday, along with below normal temperatures

* Expect mainly dry conditions later Saturday into early Sunday, then another weak system and cold front will bring spotty showers Sunday afternoon into early Monday

* High pressure brings dry conditions and seasonable temperatures Monday into Tuesday

Details .

Thursday night through Saturday .

00Z models continue to signal long wave blocking pattern across the North America and beyond during this timeframe, with cutoff H5 low pres across western Canada and a second low S of Nova Scotia around 00Z Friday. The low at the surface and aloft will remain SE of the region through Friday night and possibly into early Saturday morning.

With the deep cyclonic flow in place, the area of rain will continue across the region Thursday night. With cooler temperatures across the E slopes of the Berkshires, may see some mixing with light snow at times as well. The precip should taper off to showers during Friday as the cutoff low slowly shifts E during the day. Will see the winds become northerly, so this will allow drier air to slowly work into western areas Friday afternoon but showers linger closer to the coast. It will remain chilly on Friday, with highs only in the mid 40s to around 50, mildest across the CT valley.

There will also be strong wind gusts as the tight pressure gradient remains between the offshore low and high pressure to the W. So, will see strong N-NE winds continue Thu night into early Fri night with gusts up to 25-35 kt, possibly higher at times across Cape Cod and the islands.

The cyclonic flow associated with the upper low will finally push offshore Friday night as the showers end across western Mass/N central CT, but will continue to linger along E coastal areas. They will finally shift offshore toward daybreak Saturday, exiting Cape Cod and the islands by mid morning. Clouds will linger through most of Saturday as winds slowly diminish.

. Coastal Flood potential .

Another aspect that is a concern are the increasing astronomical tides during this timeframe. This, along with the persistent northerly winds over several tide cycles, there is the potential for coastal flooding during the Friday morning tide across the Cape Cod Bay side especially in the Sandwich and Dennis areas as well as in Nantucket Harbor. Also monitoring the high tides on Friday night and Saturday for the possibility of minor coastal flooding at Nantucket.

Saturday night through Sunday night .

Ridging at the surface and aloft finally approaches from the W with dry conditions Saturday night as the northern stream mid level steering flow starts to flatten out. The ridge will shift E by early Sunday as clouds start to increase across western areas. Will see a cold front approach, but this appears to be a moisture starved system. May see spotty showers as the front shifts across the region Sunday afternoon and night. Expect the front to approach east coastal Mass by daybreak Monday.

Monday and Tuesday .

At this point, may see a few lingering showers along the S coast early Monday as the cold front moves offshore, then should see high pressure build across the northeast out of western Quebec. The high should linger through most of Tuesday with dry conditions. Expect highs to run close to seasonal levels both days, topping off mainly in the 50s except cooler across Cape Cod and the islands.

AVIATION /09Z WEDNESDAY THROUGH SUNDAY/. Forecaster Confidence Levels .

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

Through 12z . MVFR cigs Cape/Islands spreading inland across SE MA, otherwise mainly VFR.

Today . Moderate confidence due to some uncertainty with how far inland MVFR cigs will track.

Expect MVFR cigs developing across much of eastern MA/RI this morning with pockets of IFR this afternoon outer Cape/Islands. Mainly VFR to the west. Low risk for some light rain developing late in the day Cape/Islands. N wind gusts 25-30 kt developing in the afternoon over Cape/Islands.

Tonight . Moderate confidence. MVFR cigs eastern MA/RI with localized IFR outer Cape/ACK. Mainly VFR to the west. Occasional light rain developing over the Cape/Islands and possibly spreading across eastern MA overnight. N wind gusts to 35 kt over ACK and outer Cape with 25 kt gusts developing along the coast.

Thursday . Moderate confidence. MVFR with occasional rain developing eastern MA/RI gradually spreading west and possibly reaching CT valley by late afternoon. Areas of IFR Cape/Islands. N wind gusts 35-40 kt outer Cape/ACK with 25 kt gusts elsewhere.

KBOS Terminal . High confidence in trends, but lower confidence on exact timing. MVFR cigs developing 12-14z.

KBDL Terminal . High confidence.

Outlook /Thursday Night through Sunday/ .

Thursday Night: Mainly MVFR, with local IFR possible. Strong winds with local gusts up to 40 kt. RA likely, patchy BR.

Friday: Mainly MVFR, with local IFR possible. Strong winds with local gusts up to 40 kt. Chance SHRA, patchy BR.

Friday Night: MVFR/IFR conditions possible. Windy with gusts up to 35 kt. Slight chance SHRA, patchy BR.

Saturday: Mainly VFR, with areas MVFR possible. Windy with local gusts up to 30 kt.

Saturday Night: VFR.

Sunday: Mainly VFR, with local MVFR possible.

MARINE. Gale warnings issued for eastern MA waters as strong ocean storm to the south results in a strengthening low level jet. N wind gusts to 35-40 kt develop tonight and continue into Fri. SCA for south coastal waters west of Cape Cod with gusts mainly below 35 kt. Rain developing tonight over eastern MA waters and moving west through Thu. Some vsby restrictions likely.

Outlook /Thursday Night through Sunday/ .

Thursday Night: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 21 ft. Rain likely, patchy fog. Local visibility 1 to 3 nm.

Friday: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 22 ft. Chance of rain showers, patchy fog.

Friday Night: Low risk for gale force winds with gusts up to 40 kt. Rough seas up to 20 ft. Chance of rain showers, patchy fog.

Saturday: Low risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 16 ft.

Saturday Night: Winds less than 25 kt. Rough seas up to 13 ft.

Sunday: Winds less than 25 kt. Rough seas up to 10 ft.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Gale Warning from 1 AM Thursday to 8 PM EDT Friday for ANZ231- 232-250. Small Craft Advisory from 11 AM this morning to 8 AM EDT Friday for ANZ233>235-237. Small Craft Advisory from 1 AM Thursday to 8 AM EDT Friday for ANZ230-236. Small Craft Advisory until 8 PM EDT Thursday for ANZ251-256. Gale Warning from 7 PM this evening to 8 PM EDT Friday for ANZ254-255.

SYNOPSIS . KJC/EVT NEAR TERM . KJC SHORT TERM . KJC LONG TERM . EVT AVIATION . KJC/EVT MARINE . KJC/EVT


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 14 mi35 min N 12 G 14 37°F 43°F5 ft1011.7 hPa (-1.3)33°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 26 mi35 min ENE 9.7 G 12 39°F 6 ft1011.9 hPa (-1.2)28°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 26 mi81 min N 14 G 16 36°F 42°F6 ft1010.3 hPa
44090 26 mi55 min 43°F1 ft
BHBM3 - 8443970 - Boston, MA 27 mi61 min 35°F 43°F1012 hPa
WAXM3 - Waquoit Bay Reserve, MA 40 mi100 min WNW 2.9 34°F 1012 hPa32°F
FRVM3 - 8447386 - Fall River, MA 42 mi55 min 33°F 45°F1012.1 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 43 mi55 min NNE 8 G 9.9 34°F 1012 hPa
BZBM3 - 8447930 - Woods Hole, MA 43 mi55 min 36°F 44°F1011.5 hPa
FRXM3 43 mi55 min 34°F 30°F
FOXR1 - 8454000 - Providence, RI 48 mi55 min NE 4.1 G 8.9 35°F 43°F1012.1 hPa
PVDR1 48 mi55 min N 8.9 G 11 34°F 1012.2 hPa29°F
44020 - NANTUCKET SOUND 49 mi45 min 2 ft
CPTR1 - 8452944 - Conimicut Light, RI 49 mi55 min N 11 G 14 34°F 45°F

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA5 mi50 minN 010.00 miMostly Cloudy34°F32°F93%1012.5 hPa
Plymouth, Plymouth Municipal Airport, MA18 mi33 minN 810.00 miOvercast32°F30°F92%1011.2 hPa
Provincetown Municipal Airport, MA24 mi29 minN 010.00 miOvercast36°F34°F93%1012 hPa

Link to 5 minute data for KGHG

Wind History from GHG (wind in knots)
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Tide / Current Tables for Damons Point, North River, Massachusetts
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Damons Point
Click for Map
Wed -- 02:19 AM EDT     Moonset
Wed -- 05:45 AM EDT     8.32 feet High Tide
Wed -- 06:21 AM EDT     First Quarter
Wed -- 06:24 AM EDT     Sunrise
Wed -- 11:34 AM EDT     Moonrise
Wed -- 12:33 PM EDT     0.87 feet Low Tide
Wed -- 06:31 PM EDT     7.35 feet High Tide
Wed -- 07:09 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.62.445.6788.37.76.44.83.31.91123.556.37.27.36.55.44.12.9

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Wed -- 01:35 AM EDT     1.15 knots Max Flood
Wed -- 02:20 AM EDT     Moonset
Wed -- 05:07 AM EDT     -0.00 knots Slack
Wed -- 06:21 AM EDT     First Quarter
Wed -- 06:25 AM EDT     Sunrise
Wed -- 08:13 AM EDT     -1.01 knots Max Ebb
Wed -- 11:34 AM EDT     Moonrise
Wed -- 12:09 PM EDT     0.00 knots Slack
Wed -- 02:08 PM EDT     1.06 knots Max Flood
Wed -- 05:43 PM EDT     -0.00 knots Slack
Wed -- 07:10 PM EDT     Sunset
Wed -- 08:41 PM EDT     -0.84 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.411.10.90.60.1-0.5-0.9-1-1-0.8-0.7-0.10.71.110.80.4-0.2-0.6-0.8-0.8-0.7-0.6

Weather Map
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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 (5,6,7,8)
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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.