Tuesday, May30, 2017 L-36.com


Marine Weather and Tides
Green Harbor-Cedar Crest, MA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:08AMSunset 8:13PM Tuesday May 30, 2017 5:11 AM EDT (09:11 UTC) Moonrise 10:23AMMoonset 12:00AM Illumination 23% Phase: Waxing Crescent; Moon at 5 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- 409 Am Edt Tue May 30 2017
Today..E winds around 5 kt...becoming se this afternoon. Seas 1 foot or less. Patchy dense fog this morning...then patchy fog this afternoon. Vsby 1 nm or less...increasing to 1 to 3 nm this afternoon.
Tonight..S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog. Vsby 1 to 3 nm.
Wed..S winds 5 to 10 kt. Seas 1 foot or less. Patchy fog.
Wed night..SW winds 5 to 10 kt. Seas 1 foot or less.
Thu..SW winds 5 to 10 kt with gusts up to 25 kt. Seas around 2 ft.
Thu night..W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers.
Fri night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. A chance of showers.
Sat..W winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Sat night..W winds around 5 kt. Seas 1 foot or less. 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 409 Am Edt Tue May 30 2017
Synopsis for massachusetts and rhode island coastal waters.. Weak high pres will retreat ne today and tonight. A cold front will approach from the W on Wed...passing E of the waters late Wed night. W to sw winds follow for Thu...fri and Sat. 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 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 300745
afdbox
area forecast discussion
national weather service taunton ma
345 am edt Tue may 30 2017

Synopsis
Weak high pres will build across the region today, bringing dry
weather but with temperatures remaining below normal. An
approaching cold front may bring a few strong thunderstorms to
the northwest of a boston to providence corridor late Wednesday
afternoon and evening. Dry and seasonable weather follows
Thursday, but unsettled weather with showers at times may return
Friday into early next week but plenty hours of dry weather
will be mixed in too.

Near term through today
A strong mid level low remains north of the great lakes today.

This should place southern new england well within a southwest
flow aloft. This will trend temperatures higher. However, a
high pressure nearby over the north atlantic will prevent this
southwest flow from reaching its maximum impact. Surface winds
should not turn southerly until late this afternoon. As such,
still expecting MAX temperatures to remain about 10 degrees
below normal.

This high pressure should also prevent many showers from moving
east into southern new england through most of today. There is a
chance for some showers and isolated thunderstorms to move into
the western half of southern new england this evening.

Short term tonight through 6 pm Wednesday
Tonight...

mid level low remains north of the great lakes. Mid level lapse
rates are slightly better than moist adiabatic across southern
new england. Still not expecting any surface-based instability.

So, while isolated thunderstorms cannot be ruled out entirely,
not thinking any thunderstorms which do develop will be very
strong. The most likely scenario is for convection to develop to
our west, then move east into our region, becoming less
widespread the farther east they travel.

Southwest flow aloft should finally take hold, resulting in near
normal low temperatures.

Wednesday...

the main concern form Wednesday remains the potential for
strong convection. Persistent cold pool aloft to our northwest
would continue to foster an environment of fairly steep mid
level lapse rates. There is also expected to be a sufficient
amount of shear within the lowest 6 km where stronger, more
organized convection would be possible.

The greatest uncertainty still revolves on how how much of a
contribution surface-based instability can make. This will
depend mostly on how quickly clouds break up in the morning.

As previously mentioned, the greatest risks would be strong
damaging winds and large hail. The greatest threat remains to
the northwest of the boston to providence corridor, particularly
across western and northern ma closer to the more supportive
synoptic dynamics.

Long term Wednesday night through Monday
Highlights...

* near seasonable and dry for Thursday
* unsettled conditions continue Friday into early next week
* seasonable temps likely into Sat with a return of below normal
temps early next week
pattern details...

the model guidance remains relatively agreeable in showing
persistent troughing across the northwest and northeast through
the period. However, the specifics at the surface remain
uncertain as various pieces of guidance are showing occasional
timing and strength issues which has lead to a spread in the
surface low tracks. Regardless the pattern continues to be
seasonable to below average in temperatures with unsettled
conditions.

Details...

Wednesday night into Thursday... High confidence.

Remaining showers and thunderstorms on Wednesday evening will
come to an end during the overnight hours as mid-level trough
pushes through the area.

Thursday will be the pick of the week as weak mid-level ridging
moves over the region in response to building high pressure to
the west. Very steep lapse rates as surface temps warm into the
upper 60s to low 70s as temps aloft continue to cool. Mid-level
lapse rates are near 7 c km and with some mid-level moisture,
believe diurnal clouds will develop. May need to watch for a
rogue thunderstorm but confidence is low as k values are quiet
low as well as pwats.

Breezy conditions will develop in response to the steep lapse
rates on Thursday with gusts near 25 to 30 mph.

Friday into Sunday... Moderate confidence.

Upper level trough will begin to take hold as another digging
shortwave from southern canada moves overhead. This will swing a
surface low pressure system from the great lakes into the
northeast. A warm front associated with this system will try to
move into the northeast on Friday with its cold front passing
through sometime on Saturday. Still some timing differences with
this system but right now it appears a more active pattern is
taking hold with a chance for iso thunder each day as WAA and
higher dewpoints moves into the area.

Sunday and beyond... Low confidence.

Cold front will stall somewhere near the region resulting in
either dry but cool weather north of the front and wet,
seasonable weather south of the front. The GFS is more amplified
pushing the front through where the ec keeps it over sne.

Continued with a blend in the guidance for now until details can
be resolved. Thus while the forecast looks wet, there will be
dry weather mixed in each day.

Aviation 06z Tuesday through Saturday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday ... Moderate confidence.

Today... MVFR ifr CIGS will lift toVFR MVFR this afternoon. A
few showers or an isolated thunderstorm possible across western
ma by late afternoon.

Tonight... More MVFR ifr conditions with scattered showers and
isold thunderstorms moving across the region.

Wednesday... MVFR-ifr conditions early may improve to MVFR-vfr
by afternoon. A few strong thunderstorms possible late afternoon
and evening, mainly northwest of a boston to providence
corridor. Lower confidence in timing.

Kbos taf... Moderate confidence in taf.

Kbdl taf... Moderate confidence in taf.

Outlook Wednesday night through Saturday ... Moderate confidence.

Wednesday night... Lingering MVFR conditions in showers and
thunderstorms. Conditions improve toVFR from west to east
overnight.

Thursday... MainlyVFR conditions. Gusty westerly winds near
25 kt.

Friday and Saturday... A period of MVFR-ifr conditions possible
in some low clouds and some showers, but timing uncertain.

Greatest risk for lower CIGS vsbys late Fri into early sat.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday ... High confidence.

Winds and seas expected to remain below small craft advisory
thresholds through Wednesday. The greatest concern for mariners
will be reduced visibility from areas of fog today into
Wednesday morning. Low risk for isolated thunderstorms tonight
into Wednesday.

Outlook Wednesday night through Saturday ... Moderate
confidence.

Wednesday night and Thursday... Pressure gradient should be weak
enough to keep winds and seas below small craft advisory thresholds.

Main concern for mariners will be for some fog, especially across
our southern waters during the late night early morning hours.

Friday and Saturday... Moderate confidence. Persistent long
southwest wind ahead of a cold front may result in seas building to
between 4 and 7 feet across our southern waters later Fri into sat.

Some showers and fog patches also may impact mariners at times. Sca
may be needed.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk dunten
near term... Belk
short term... Belk
long term... Dunten
aviation... Belk dunten
marine... Belk dunten


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 24 mi38 min 52°F1 ft
BHBM3 - 8443970 - Boston, MA 28 mi42 min 49°F 55°F1021.4 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 31 mi68 min N 5.8 G 7.8 48°F 50°F3 ft1020.1 hPa
WAXM3 - Waquoit Bay Reserve, MA 35 mi87 min 1.9 51°F 50°F
FRVM3 - 8447386 - Fall River, MA 38 mi42 min 50°F 58°F1021.4 hPa
BZBM3 - 8447930 - Woods Hole, MA 38 mi42 min 51°F 57°F1020.7 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 38 mi42 min N 5.1 G 6 50°F 1020.1 hPa
PVDR1 44 mi42 min NNW 2.9 G 5.1 50°F 1020.8 hPa49°F
FOXR1 - 8454000 - Providence, RI 44 mi42 min NNE 2.9 G 5.1 50°F 57°F1020.4 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi42 min N 5.1 G 7 50°F 59°F1021.1 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi87 min NE 4.1 50°F 1021 hPa50°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi42 min NE 4.1 G 6 50°F 1020.9 hPa

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, MA2 mi37 minN 010.00 miOvercast50°F50°F100%1021.3 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi20 minN 46.00 miFog/Mist49°F48°F97%1021.4 hPa
Taunton, Taunton Municipal Airport, MA24 mi20 minN 010.00 miOvercast50°F46°F89%1021.2 hPa
Provincetown, Provincetown Municipal Airport, MA24 mi16 minNNE 410.00 miOvercast49°F48°F100%1021.6 hPa

Wind History from GHG (wind in knots)
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Last 24hrE7SE6
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G16
NE8NE854345
G11
NE463444Calm3NW4
1 day agoSW3CalmS7
G12
SW85S4SE7SE9SE10SE7S12
G17
SW10SW9SW7S85S6S5S4S3CalmCalmSE6E6
2 days agoCalmCalm3353NW86NE8E4SE8SE7SE6SE7SE6SE3SE4S65S56S8SW64

Tide / Current Tables for Brant Rock, Green Harbor River, Massachusetts
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Brant Rock
Click for Map
Tue -- 03:23 AM EDT     11.06 feet High Tide
Tue -- 05:10 AM EDT     Sunrise
Tue -- 09:44 AM EDT     -1.16 feet Low Tide
Tue -- 10:23 AM EDT     Moonrise
Tue -- 04:07 PM EDT     9.91 feet High Tide
Tue -- 08:10 PM EDT     Sunset
Tue -- 10:04 PM EDT     0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.87.49.71110.89.474.21.4-0.7-1.1024.479.19.99.47.95.83.31.20.20.9

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Tue -- 01:26 AM EDT     -0.21 knots Slack
Tue -- 04:29 AM EDT     -4.94 knots Max Ebb
Tue -- 05:11 AM EDT     Sunrise
Tue -- 07:40 AM EDT     0.22 knots Slack
Tue -- 10:23 AM EDT     Moonrise
Tue -- 10:48 AM EDT     4.69 knots Max Flood
Tue -- 02:19 PM EDT     -0.03 knots Slack
Tue -- 05:04 PM EDT     -4.53 knots Max Ebb
Tue -- 08:09 PM EDT     Sunset
Tue -- 08:11 PM EDT     0.20 knots Slack
Tue -- 11:07 PM EDT     4.21 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.62.1-2.5-4.1-4.8-4.8-4.2-2.71.93.74.54.74.43.61.9-2.7-4.1-4.5-4.2-3.3-1.32.83.84.2

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

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 numerious 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.