Tuesday, July7, 2020
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Marine Weather and Tides
Marion Center, 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 5:15AMSunset 8:21PM Tuesday July 7, 2020 9:24 PM EDT (01:24 UTC) Moonrise 10:28PMMoonset 7:32AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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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ANZ234 Buzzards Bay- 716 Pm Edt Tue Jul 7 2020
Tonight..S winds 5 to 10 kt. Seas 1 foot or less. A slight chance of showers after midnight with vsby 1 to 3 nm.
Wed..S winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.
Wed night..SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 1 foot or less.
Thu..SW winds 5 to 10 kt. Seas 1 foot or less.
Thu night..S winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 1 foot or less. Patchy fog. Vsby 1 to 3 nm.
Fri..SE winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog. Showers likely. Vsby 1 to 3 nm.
Fri night..SE winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog. Showers likely.
Sat..S winds 5 to 10 kt. Seas 3 to 5 ft. Showers likely.
Sat night and Sun..SW winds 5 to 10 kt, increasing to 10 to 15 kt. Seas 2 to 4 ft. A chance of showers.
Sun night..SW winds 10 to 15 kt. Seas 2 to 3 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 716 Pm Edt Tue Jul 7 2020
Synopsis for massachusetts and rhode island coastal waters.. A ridge of high pressure will move east of the waters this afternoon. A cold front will slowly settle over the waters late Wednesday. Strengthening low pressure will move up along the carolina coast late Thursday and passing near cape cod on Saturday. 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 Marion Center, MA
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location: 41.7, -70.74     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 080017 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 817 PM EDT Tue Jul 7 2020

SYNOPSIS. A front lifts north of our region tonight with a few showers, but its main impact will be to deliver summer-like warmth and humidity the rest of this week into this weekend. Showers/thunderstorms will be possible each day with some heavy downpours, but much of this time will also feature dry weather. A stronger system late Friday into Saturday brings heavy rain and potential flooding issues.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. Minor tweaks to rainfall chances overnight. Watching an area light showers approaching NE CT and RI. Might see a few hundredths from these showers. No lightning at the time of this writing. Cannot completely dismiss this idea, but it is not a high probability event. Rest of the forecast looked on track.

Previous Discussion .

Very pleasant late day weather across eastern MA with lots of sunshine, warm temps but comfortable humidity with dew pts 55-60. SE flow ahead of a warm front to our southwest is beginning to advect low clouds into RI and now MVY. Abundant strato-cu continues across CT into western-central MA. Thus the trend is for all areas to trend toward cloudy. Although expecting dry weather thru sunset. Thereafter WAA pattern increases with southwest flow at 850 mb increasing to about 20-25 kt. This may be sufficient for a few showers later this evening and overnight although instability is lacking aloft, so limited thunderstorm probability to slight chance. Although keep in mind most locations probably remain dry overnight. Also with warm front approaching can't rule out some patchy fog and drizzle.

Warmer and more humid than last night with dew pts rising thru the 60s and especially toward morning, as S-SE winds become S-SW.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/. ** A few strong to severe thunderstorms possible Wednesday afternoon/evening across western & northern MA along with a low risk of flash flooding ***

Wednesday .

A few morning showers and isolated thunderstorm possible in the morning as the warm front exits the region. Morning clouds will eventually give way to at least partial sunshine. Warm sector overspreads the region in the afternoon and is accompanied by 925 mb temps of around +21C, which will support highs of 85-90 away from the south coast. This along with dew pts rising to around 70 will result in summer-like heat and humidity tomorrow.

This will also support MUCAPEs of around 2000 j/kg. Thus high CAPE environment combined with some forcing from approaching short wave yields a risk of a few strong to severe thunderstorms. Limiting factor is shear is marginal given fairly weak winds aloft along with best forcing for ascent across northern New England given track of short wave trough and its stronger wind fields. Thus greatest risk for southern New England will be western and northern MA. As such SPC has place northwest CT-western/central MA into a marginal risk in its day2 outlook. 12z HREF parameters signal this as well with greatest updraft potential and probs of thunder from NY state into VT/NH.

Given high CAPE strong winds and large hail are a concern. Perhaps equally or greater risk is flash flooding as PWATs climb to AOA 2 inches, surface dew pts around 70 and fairly weak winds aloft will yield slower moving storms that may have a tendency to back build toward better instability across western- central MA. For these reasons WPC has placed this area in a marginal risk (5-10% for flash flooding) for excessive rainfall. Not to be taken exact, but HREF shows this potential with 6 hr qpf ensemble max of 4-5 inch potential 18z-00z across northern MA possibly into northern CT/northwest RI. Again, just flagging the potential.

S-SW winds 10-15 mph expected but a few gusts to 20 mph possible especially over southeast MA.

Wednesday night .

Any early evening convection will diminish with sunset yielding a mainly dry night. However warm and humid with dew pts in the 60s. This combined with any rainfall from the afternoon may lead to areas of fog.

LONG TERM /THURSDAY THROUGH TUESDAY/. Highlights .

* Hot and humid conditions continue

* Scattered showers and thunderstorms on Thursday

* Widespread, heavy rain at times Friday into Saturday

Details .

Still looking like there will be a tropical feel to our weather most of this portion of the forecast. Near to above normal temperatures continue through next Tuesday. Expecting dew points in in the mid 60s to lower 70s, which is high to oppressive humidity for most. Heat Advisories may be needed Thursday.

The tropical feel will also mean a risk for downpours at times. The greatest risk will be during the afternoon and evening hours Thursday into Friday. Some questions remain about the timing of a coastal low pressure Friday into this weekend. The current timing places the most likely period for more widespread rainfall is Friday evening into Saturday. This timing is subject to change with later forecasts.

Confidence in the details really drop off Sunday into Tuesday. It will all come down to how far offshore a cold front can make it offshore before it stalls. If this front is off to our east, the risk for showers and thunderstorms will be less. At this time, thinking this front does stall just off to our east, but a low pressure may drag it closer to the coast heading into Tuesday.

AVIATION /00Z WEDNESDAY THROUGH SUNDAY/. Forecaster Confidence Levels .

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

Tonight . moderate confidence.

Trending toward MVFR/IFR as the night progresses. Isolated or widely scattered showers. Probability of -TSRA is very low. S-SE winds becoming S-SW with time.

Wednesday . moderate confidence.

Morning IFR/MVFR in isolated/scattered showers gives way to MVFR/VFR conditions. Isolated/scattered TSRA in the afternoon with highest probability is northern MA, especially western MA into NW CT. A few strong storms possible. SW winds 10-15 kt but gusts up to 20 kt possible especially southeast MA.

Wednesday night . moderate confidence.

Any evening storms diminish with mainly a dry night thereafter. Mainly VFR but low probability of MVFR/IFR in spots. Light SW winds continue.

KBOS Terminal . high confidence in TAF thru about 03z then some uncertainty when and if MVFR cigs arrive along with how widespread showers will become tonight.

KBDL Terminal . high confidence in TAF. Some uncertainty if TSRA threat across NY/MA/VT/NH will extend southward into CT tomorrow.

Outlook /Thursday through Sunday/ .

Thursday: VFR. Slight chance SHRA, isolated TSRA.

Thursday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA, patchy BR.

Friday: Mainly VFR, with local IFR possible. Chance SHRA, isolated TSRA, patchy BR.

Friday Night: MVFR/IFR conditions possible. SHRA likely, isolated TSRA.

Saturday: Mainly VFR, with local IFR possible. SHRA likely, isolated TSRA.

Saturday Night through Sunday: VFR. Chance SHRA, isolated TSRA.

MARINE. Tonight . Low clouds increase as the night progresses with patchy fog and drizzle possible. Also a few showers possible too. S-SE winds but trending S-SW as warm front pushes into the waters toward morning.

Wednesday . Warm front lifts north of the waters with winds becoming SW 10-15 kt but gusts to 20 kt possible near shore. A few thunderstorms possible northern MA waters in the afternoon. Morning patchy fog and drizzle improve by midday.

Wednesday night . any early evening storms over the northern MA waters dissipate with sunset. Light SSW winds continue. Warm and humid conditions may result in patchy fog.

Outlook /Thursday through Sunday/ .

Thursday: Winds less than 25 kt.

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

Friday: Winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers, patchy fog.

Friday Night: Winds less than 25 kt. Areas of rough seas. Rain showers likely, isolated thunderstorms.

Saturday: Winds less than 25 kt. Areas of rough seas. Chance of rain showers, isolated thunderstorms.

Saturday Night: Winds less than 25 kt. Local rough seas. Chance of rain showers, isolated thunderstorms.

Sunday: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers, isolated thunderstorms.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . None.

SYNOPSIS . Belk/Nocera NEAR TERM . Belk/Nocera SHORT TERM . Nocera LONG TERM . Belk AVIATION . Belk/Nocera MARINE . Belk/Nocera


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BZBM3 - 8447930 - Woods Hole, MA 13 mi54 min 65°F 70°F1020.9 hPa
WAXM3 - Waquoit Bay Reserve, MA 14 mi99 min E 1.9 65°F 1021 hPa64°F
FRVM3 - 8447386 - Fall River, MA 22 mi54 min 66°F 74°F1020.7 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 23 mi54 min SE 7 G 12 66°F 1020.5 hPa
FRXM3 23 mi54 min 66°F 63°F
44090 24 mi57 min 67°F1 ft
BUZM3 - Buzzards Bay, MA 26 mi84 min ESE 8.9 G 9.9 1022 hPa (-0.0)
44020 - NANTUCKET SOUND 28 mi194 min SSE 14 G 16 65°F 71°F1020.5 hPa63°F
PRUR1 31 mi72 min 65°F 65°F
CPTR1 - 8452944 - Conimicut Light, RI 32 mi54 min 65°F 74°F1020.3 hPa
NAXR1 - Narragansett Bay Reserve, RI 32 mi99 min S 2.9 65°F 1021 hPa62°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 32 mi54 min S 2.9 G 6 65°F 1021 hPa
NWPR1 - 8452660 - Newport, RI 34 mi54 min SE 8.9 G 11 64°F 64°F1020.3 hPa
PVDR1 35 mi54 min S 12 G 14 67°F 1020.5 hPa65°F
FOXR1 - 8454000 - Providence, RI 36 mi54 min SSW 11 G 15 67°F 71°F1020.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 36 mi54 min SSE 8 G 9.9 66°F 74°F1020.4 hPa
CHTM3 42 mi66 min S 8 G 12 60°F 1020.9 hPa
NTKM3 - 8449130 - Nantucket Island, MA 45 mi54 min SE 5.1 G 8.9 62°F 73°F1021.4 hPa
BHBM3 - 8443970 - Boston, MA 48 mi54 min 72°F 69°F1018.4 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Bedford, New Bedford Regional Airport, MA12 mi31 minSSE 710.00 miOvercast64°F63°F96%1020.2 hPa
Otis Air National Guard Base, MA12 mi34 minS 9 G 2510.00 miOvercast66°F62°F88%1021 hPa
Plymouth, Plymouth Municipal Airport, MA15 mi32 minVar 310.00 miOvercast65°F61°F87%1020.7 hPa
Taunton, Taunton Municipal Airport, MA20 mi32 minSSE 310.00 miOvercast67°F61°F81%1020.3 hPa
Marthas Vineyard Airport, MA21 mi31 minSSE 710.00 miOvercast65°F62°F90%1020.8 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA24 mi28 minSE 510.00 miMostly Cloudy66°F61°F84%1020.5 hPa

Link to 5 minute data for KEWB

Wind History from EWB (wind in knots)
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Last 24hrNE3E3CalmSE7SW4SW3S7S3SE4E3E5S8S6S6SE7
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1 day agoS6S7SW93SE4S3S4SW5Calm6N35N7N8
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NE8NE9NE8NE8NE8NE10NE7NE7E6E4
2 days agoS3SW6SW6S54SW6W5SW5SW5SW4S7SW5SW7SW8SW6S8SW10S10SW12S10SW10S10S9S5

Tide / Current Tables for Piney Point, Buzzards Bay, Massachusetts
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Tue -- 02:22 AM EDT     -4.81 knots Max Ebb
Tue -- 05:15 AM EDT     Sunrise
Tue -- 05:37 AM EDT     0.02 knots Slack
Tue -- 07:31 AM EDT     Moonset
Tue -- 08:49 AM EDT     4.55 knots Max Flood
Tue -- 12:13 PM EDT     -0.21 knots Slack
Tue -- 02:53 PM EDT     -4.35 knots Max Ebb
Tue -- 05:57 PM EDT     0.03 knots Slack
Tue -- 08:19 PM EDT     Sunset
Tue -- 08:56 PM EDT     4.12 knots Max Flood
Tue -- 10:27 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.6-4.1-4.8-4.7-4-2.623.74.44.54.23.41.5-2.9-4.1-4.3-4-2.90.633.94.13.93.1

Weather Map
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wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (21,6,7,8)
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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.