Tuesday, November30, 2021
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Marine Weather and Tides
Green Harbor-Cedar Crest, MA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:49AMSunset 4:14PM Tuesday November 30, 2021 6:25 PM EST (23:25 UTC) Moonrise 3:04AMMoonset 3:05PM Illumination 12% Phase: Waning Crescent; Moon at 26 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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ANZ231 Cape Cod Bay- 427 Pm Est Tue Nov 30 2021
Tonight..W winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. A slight chance of showers this evening.
Wed..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Wed night..SW winds 5 to 10 kt. Seas around 2 ft.
Thu..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Thu night..SW winds 15 to 20 kt, becoming W 20 to 25 kt after midnight. Seas 2 to 4 ft. A chance of showers.
Fri..W winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft.
Fri night..NW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft. A chance of snow showers. Vsby 1 to 3 nm.
Sat..W winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain and snow showers. Vsby 1 to 3 nm.
Sat night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers.
Sun..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Sun night..E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 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 427 Pm Est Tue Nov 30 2021
Synopsis for massachusetts and rhode island coastal waters.. Seas and southwest winds increase somewhat overnight, as a cold front approaches from the west. The cold front crosses the area on Wednesday, with winds and seas diminishing as the day progresses. Winds and seas build on Thursday as a warm front crosses through the region. Then a strong cold front crosses the waters Thursday night, followed by gusty wnw winds and rough seas through Friday. Blustery conditions prevail through the weekend. Another weather system brings affects the northeast later in the weekend into Monday, however there is a large amount of uncertainty regarding the track and intensity of this system. 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 Green Harbor-Cedar Crest, MA
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location: 42.08, -70.65     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 302034 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 334 PM EST Tue Nov 30 2021

SYNOPSIS. A shortwave trough brings the chance of showers and flurries to southern parts of our area through Wednesday evening. Wednesday will be sandwiched between the aforementioned trough and a second disturbance Thursday, which will bring rain and snow showers to our area. A cold front will sweep precipitation out on Friday, ushering blustery and cold conditions for the weekend. Another weather system brings another round of precipitation to the Northeast. But the track to this system remains in doubt, bringing uncertainty as to the type of precipitation.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. A weak shortwave trough will continue to sweep to our south through the early evening hours, bringing along the chance of showers across central CT, the south coast of MA, southern RI, and the Islands. While a surge of moisture allows surface dewpoints rise into the upper 20s and low 30s, which are downright comfortable compared to overnight dews in the 10s, a significant dry layer between 850 and 550 mb will make it extremely difficult for precipitation to make it to the surface, meaning that only the heaviest of showers may produce up to 0.01 or 0.02" of QPF, most likely across Nantucket or Martha's Vineyard. Given sub zero temps to about 950 mb, precipitation will sneak through as flurries along the northern extend of the precipitation shield. While radar signatures may indicate widespread precipitation, most showers/flurries will evaporate before hitting the ground, much like they did during the day on Monday.

Flurries may also initiate across the east slopes of the Berkshires, but as this system moves quickly to our northeast, flurry chances diminish quickly after sunset.

Deep mixing that occurred during the daytime will take awhile to decouple overnight, with winds expected between 5-10 kt. Combined with increasing cloud cover and higher dewpoints, the light winds will keep most areas from radiating overnight. Clearing after midnight may allow a few areas, namely in NW MA to radiate if winds go calm for an hour or two. All in all, temperatures are expected to be a solid 10-15F warmer this evening compared to last.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/. The daytime hours of Wednesday will fall into a dry pocket between systems. As the shortwave that passed south of us on Tuesday evening departs, clouds will clear across most of southern New England. Westerly winds develop Gusty westerly winds, between 15-25 kt, will develop around 15Z as we mix back up to 900mb. A warming trend is set to begin on Wednesday, as 925 mb temps tomorrow will linger just a few degrees C below 0C. Temperatures but will warm through the day, so mixing to 900 mb will enhance temperatures on Wednesday. Widespread upper 30s and low 40s can be expected. Cloud cover begins to creep back into southern New England late in the day and during the early evening hours as our next precipitation maker approaches from the west. Warm air advection will ride a wind switch to the W/SW Wednesday evening as 925mb temps increase to +2 to +4C, resulting in stable and warming temps overnight. Low temperatures are generally expected to occur just after sunset and will be between 28F and 40F, coolest across NW MA. Model guidance is split on exactly how progressive our next system will be, with the GFS bringing precipitation into our area as early as 06Z. Other guidance, like the ECMWF and Canadian models are more conservative, bringing precipitation to southern New England around 12Z. Given that some areas of NW and Central MA and northern CT will still be around the freezing mark as precipitation moves in, light snow may be observed as the low noses east.

LONG TERM /THURSDAY THROUGH TUESDAY/.

Big Picture .

Near-zonal flow aloft late this week and the weekend. This will feature several shortwaves moving across New England. One shortwave that moves ashore in the Pacific NW Saturday digs a trough over the Northeast USA Monday, followed by a shortwave dropping south from Northern Canada Tuesday.

Contour heights will be below normal Thursday-Friday, then climb to normal or a little above over the weekend. There are signs of a cool- down Monday night and possibly Tuesday.

Mass fields are similar through Saturday and possibly Sunday, then quickly diverge as a system moves through on Monday. Confidence is moderate-high Thursday through Sunday, then drops to low for Sunday night through Tuesday.

Details .

Thursday . Shortwave and surface low move across Canada. This drags a warm front through Southern New England. The shortwave and its supporting upper jet will generate sufficient lift to generate clouds and showers. Surface winds will increase with increasing pressure gradient. Expect southwest winds 10 to 15 kt in the afternoon, then become gusty in the evening with gusts 20 to 25 kt. Temperatures will start the day cold enough for some snow showers, but then temperatures will climb into the 40s and lower 50s, which will change any snow over to rain.

The Canadian low then sweeps a cold front through the region Thursday night. Scattered showers will move offshore with the cold front. Cold advection behind the front will tap stronger wind speeds at 900-850 mb, about 40-50 kt with 30 kts closer to the surface. Winds will swing out of the West-northwest . will expect gusts near 30. This draws in drier cooler air, as well as some clearing. Temps should drop back into the 30s.

Friday . High pressure moves over the region, bringing fair skies. The pressure gradient will maintain northwest winds, and cold advection mixing will support gusts of 30 kt. Temps aloft suggest max temps around 40 in Nrn Mass and 40-45 farther south.

Friday night-Saturday . Another shortwave drops through from Canada Saturday. This will generate chance pops for snow showers, possible snow/rain showers south of the Mass Pike. Temps will climb Saturday only to the mid 30s to low 40s.

Sunday . High pressure moves over the region with fair weather and continued cool temps. Temps aloft will again support max temps in the mid 30s to low 40s.

Monday-Tuesday . Highly uncertain system for early next week. The GFS keeps the upper flow shallow and carries this system through Canada. This brings a chance of rain showers Monday, then a cold front swings through late Monday, followed by drying and colder air. Meanwhile, the 00Z ECMWF . 12Z was unavailable . digs a slightly deeper upper trough and drops the surface low farther south to the New England south coast. This would support snow or snow showers. The range of solutions lends low confidence to either solution. Either scenario remains possible. So the forecast will maintain continuity with the previous forecast of chance of rain or snow showers. Stay tuned for later updates.

AVIATION /21Z TUESDAY THROUGH SUNDAY/. Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent.

High confidence in the forecast.

Tonight: Gradual clearing after midnight, skies remain VFR. Winds diminish and become light out of the WSW. MVFR conditions may develop at Nantucket as a few spotty showers develop.

Wednesday: VFR. Breezy W/WNW winds 10 to 15 knots. Mid level clouds build in during the second half of the day.

KBOS TAF . high confidence. Dry conditions prevail through the period with SW winds and VFR expected. Mid level clouds build persist through about 06Z. Ceilings will lift before sunrise as gusty westerly flow develops, between 15-20kt, again Wednesday morning.

KBDL TAF . high confidence. Light flurries possible this evening. VFR for the period. SW wind less than 10 knots. Mid level clouds persist through midnight before gradual clearing occurs Wednesday morning as winds turn to the west.

Outlook /Thursday through Sunday/ .

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

Thursday Night: Mainly VFR, with areas MVFR possible. Windy with local gusts up to 30 kt. Slight chance SHRA.

Friday: VFR. Windy with areas of gusts up to 30 kt.

Friday Night: Mainly VFR, with areas IFR possible. Breezy. Chance SHSN.

Saturday: Mainly VFR, with areas IFR possible. Breezy. Chance SHSN, chance SHRA.

Saturday Night: Mainly VFR, with local IFR possible. Breezy.

Sunday: VFR. Breezy.

MARINE. Forecaster Confidence Levels.

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

Tonight . High Confidence.

Chance for light showers this evening a system passes over the southern waters. Southwest wind becomes west at 15-20 kt, gusting to 20-25 knots. Wave heights begin to build back in from the south up to 7 feet. Small craft advisories have been issued for this evening starting between 18 an 00Z for areas south of Rhode Island and the Islands.

Wednesday: Gusty west winds 20 to 25 knots and wave heights build 5-7 feet across the outer ocean waters. SCA in place until Wednesday evening.

Outlook /Thursday through Sunday/ .

Thursday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers.

Thursday Night: Strong winds with local gusts up to 30 kt. Rough seas up to 10 ft. Slight chance of rain showers.

Friday: Strong winds with gusts up to 30 kt. Rough seas up to 10 ft.

Friday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Local rough seas. Chance of rain showers, chance of snow showers. Areas of visibility 1 to 3 nm.

Saturday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers, chance of snow showers. Local visibility 1 to 3 nm.

Saturday Night: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers. Local visibility 1 to 3 nm.

Sunday: Winds less than 25 kt. Seas up to 5 ft.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory from midnight tonight to 6 PM EST Wednesday for ANZ255-256. Small Craft Advisory until 6 PM EST Wednesday for ANZ254. Small Craft Advisory from 3 AM to 8 AM EST Wednesday for ANZ235-237.

SYNOPSIS . WTB/KS NEAR TERM . KS SHORT TERM . KS LONG TERM . WTB AVIATION . WTB/KS MARINE . WTB/KS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 18 mi36 min SW 14G19 51°F2 ft1013.5 hPa
44090 24 mi30 min 50°F2 ft
BHBM3 - 8443970 - Boston, MA 28 mi56 min 39°F 1012.7 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 31 mi82 min WSW 18G21 42°F 51°F3 ft1012 hPa
WAXM3 - Waquoit Bay Reserve, MA 35 mi101 min WSW 1.9 36°F 1014 hPa33°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 38 mi56 min SW 15G18 39°F 1013.9 hPa
BZBM3 - 8447930 - Woods Hole, MA 38 mi56 min 40°F 47°F1014.1 hPa
FRVM3 - 8447386 - Fall River, MA 38 mi56 min 38°F 46°F1014.4 hPa
FOXR1 - 8454000 - Providence, RI 44 mi56 min SW 5.1G7 37°F 49°F1013.8 hPa
PVDR1 44 mi56 min SSW 5.1G8 38°F 1014 hPa
44020 - NANTUCKET SOUND 45 mi36 min WSW 12G14 40°F 46°F1 ft1014.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi56 min NW 9.9G14 37°F 47°F1013.3 hPa
CHTM3 46 mi56 min WSW 4.1G8.9 38°F 42°F1014 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi101 min W 6 37°F 1014 hPa28°F
PRUR1 48 mi56 min 38°F 30°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi56 min W 7G11 37°F 1014.5 hPa

Wind History for Borden Flats Light at Fall River, MA
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This dayNW12
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA2 mi51 minSW 510.00 miOvercast37°F23°F56%1013.5 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi34 minSSW 610.00 miMostly Cloudy37°F26°F65%1013.6 hPa
Provincetown Municipal Airport, MA24 mi30 minWSW 13 G 2010.00 miOvercast39°F26°F60%1013.8 hPa
Taunton, Taunton Municipal Airport, MA24 mi34 minSW 410.00 miMostly Cloudy36°F24°F62%1013.6 hPa

Link to 5 minute data for KGHG

Wind History from GHG (wind in knots)
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This dayNW6
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1 day ago00000000W30NW3W3W3--NW66
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2 days agoW7W7
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Tide / Current Tables for Gurnet Point, Massachusetts
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Gurnet Point
Click for Map
Tue -- 01:06 AM EST     0.48 feet Low Tide
Tue -- 02:03 AM EST     Moonrise
Tue -- 06:50 AM EST     Sunrise
Tue -- 07:17 AM EST     9.60 feet High Tide
Tue -- 01:38 PM EST     0.43 feet Low Tide
Tue -- 02:04 PM EST     Moonset
Tue -- 04:12 PM EST     Sunset
Tue -- 07:41 PM EST     9.34 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Tue -- 01:05 AM EST     0.00 knots Slack
Tue -- 02:05 AM EST     Moonrise
Tue -- 03:33 AM EST     1.29 knots Max Flood
Tue -- 06:52 AM EST     Sunrise
Tue -- 06:56 AM EST     -0.00 knots Slack
Tue -- 10:38 AM EST     -1.23 knots Max Ebb
Tue -- 01:35 PM EST     0.00 knots Slack
Tue -- 02:05 PM EST     Moonset
Tue -- 04:06 PM EST     1.26 knots Max Flood
Tue -- 04:12 PM EST     Sunset
Tue -- 07:19 PM EST     -0.00 knots Slack
Tue -- 10:51 PM EST     -1.25 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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