Sunday, June24, 2018 L-36.com


Marine Weather and Tides
Plymouth, MA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:06AMSunset 8:24PM Sunday June 24, 2018 12:24 PM EDT (16:24 UTC) Moonrise 5:05PMMoonset 2:57AM Illumination 86% 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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ANZ231 Cape Cod Bay- 1006 Am Edt Sun Jun 24 2018
This afternoon..SW winds around 5 kt, becoming S 10 to 15 kt. Seas 1 foot or less.
Tonight..SW winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Mon..N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Mon night..N winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft.
Tue..N winds 5 to 10 kt, becoming E in the afternoon. Seas around 2 ft.
Tue night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Wed..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Wed night..S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Thu..S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Thu night..SW winds 15 to 20 kt with gusts up to 25 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 1006 Am Edt Sun Jun 24 2018
Synopsis for massachusetts and rhode island coastal waters.. Weak low pressure and a cold front will approach the waters late this afternoon and evening. The front will move offshore Mon. High pres builds into the region Tue and Wed. A warm front will push N of the waters late Wed night, followed by a cold front Thu. 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 Plymouth, MA
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location: 42, -70.54     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 241427
afdbox
area forecast discussion
national weather service boston norton ma
1027 am edt Sun jun 24 2018

Synopsis
A weak, broad area of high pressure will bring in drier
conditions this morning. Low pressure from the great lakes
will push across the region, bringing showers and a few
thunderstorms this afternoon and evening. Scattered showers and
thunderstorms are possible Monday. Sunny and seasonable weather
Tuesday into Wednesday with high pressure in control. After some
showers and thunderstorms Wednesday night and Thursday, summer
heat and humidity will return Friday and Saturday as this high
moves east of the region.

Near term until 6 pm this evening
1020 am update...

still lots of stratus across sne this morning but there are
breaks developing. While clouds will dominate for much of the
day per abundant low level rh, there will be some breaks of
sunshine as well. Stratus may be tough to erode along the
immediate south coast and especially the islands with fog
redeveloping over the islands by late afternoon. The clouds
should hold temps in the 70s, possibly near 80 in the ct and
merrimack valleys.

The main concern for this afternoon is the thunderstorm risk as
mid level trough approaches from the west. Various hi-res
guidance sources do suggest at least sct storms will develop
mid late afternoon. Some mid level cooling later this afternoon
combined with dewpoints rising into the mid upper 60s will
contribute to capes around 1000 j kg. Mid level lapse rates are
not favorable but there should be enough instability combined
with approaching trough for sct t-storms to develop, mainly
interior where instability axis sets up. 0-6km shear 35-40 kt so
can't rule out a few strong to severe storms, but weak mid
level lapse rates will likely limit areal coverage.

Short term 6 pm this evening through 6 am Monday
The weak low and associated front will push across the region
tonight. Precip should taper off during the evening across the
ct valley, then around or after midnight further e. Some
downpours will still be possible through around 06z with the
higher pwats. Winds will shift to n-nw as the front passes.

Temps will fall back to the upper 50s to mid 60s as clouds
linger through most of the night especially across central and
eastern areas.

Long term Monday through Saturday
Highlights...

* seasonable temperatures through Thu with chance of showers
Monday and Wed night thu
* prolonged heat wave may begin next weekend
Monday...

24 00z guidance has all come into line swinging an anomalously
strong cold pool across our region during this time. Expected
wind directions still favor some surface convergence somewhere
across eastern ma and ri. The combination of these two features
should be enough to trigger some showers, and perhaps a few
thunderstorms during the afternoon, too. Below normal
temperatures anticipated.

Drying out Monday night, with decent radiational cooling
conditions developing as high pressure starts to arrive.

Tuesday...

sunny and pleasant with surface high pressure centered just south
of our region. Low humidity, with dewpoints in the mid and
upper 40s. Clear tue. Night with pleasant sleeping conditions
with lows in the 50s.

Wednesday...

mainly dry weather expected, with an increasing risk for showers
late in the day across far western ma. Near normal temperatures
Wednesday night and Thursday...

a cold front moves into southern new england with above normal
humidity. Showers and a few thunderstorms are likely, with some
potentially heavy downpours. This front exits our region
sometime Thu night, bringing an end to the threat of
precipitation.

Friday and Saturday...

the upper level pattern changes significantly, with a building
mid level ridge along the eastern seaboard. Ensembles continue
to indicate well above normal temperatures at 925 mb and 850 mb.

This should mean well above normal temperatures at the surface
as well, except for perhaps the CAPE and islands where SW flow
off the water will keep temperatures lower. Expecting hot and
humid conditions during this time, perhaps continuing into early
next week. Heat advisories will likely be needed, especially by
Saturday.

Aviation 14z Sunday through Thursday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through tonight ... Moderate confidence.

1020 am update...

ifr MVFR CIGS should lift toVFR this afternoon, but lower
conditions lingering along the immediate south coast and
islands. Sct t-storms developing in the interior mid late
afternoon with brief lower conditions.

Tonight...

any showers thunderstorms end early across W and central, then
by around 06z e. Any MVFR-ifr conditions will improve toVFR
overnight. Winds shift to n-sw overnight bringing drier air.

Kbos terminal... High confidence in TAF trends. Moderate
confidence in timing.

Kbdl terminal... High confidence in TAF trends. Moderate
confidence in timing.

Outlook Monday through Thursday ... Moderate confidence.

Monday:VFR. Breezy. Slight chance shra.

Monday night through Tuesday:VFR.

Tuesday night:VFR. Breezy.

Wednesday:VFR. Breezy. Slight chance shra.

Wednesday night: mainlyVFR, with areas MVFR possible. Breezy.

Shra likely.

Thursday: mainlyVFR, with areas MVFR possible. Breezy. Chance
shra, slight chance tsra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through tonight ... High confidence.

Today...

southwest winds during the day will remain light. Seas will
generally be below 5 feet. Vsbys lowering by late afternoon over
south coastal waters as fog redevelops.

Tonight...

winds less than 25 knots, and seas 4 ft or less. Some lingering
5 foot seas may linger on the southern outer waters. A cold
front will move south across the waters around midnight or so,
and may continue to generate showers and a chance of a
thunderstorm. This should move out to sea overnight.

Outlook Monday through Thursday ... Moderate confidence.

Monday: low risk for small craft advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft. Slight chance of rain
showers.

Monday night: winds less than 25 kt. Areas of seas approaching
5 ft.

Tuesday: winds less than 25 kt.

Tuesday night: winds less than 25 kt. Seas locally approaching
5 ft.

Wednesday: winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of rain showers.

Wednesday night: low risk for small craft advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain showers.

Thursday: moderate risk for small craft advisory winds with
gusts up to 30 kt. Areas of rough seas. Chance of rain showers,
slight chance of thunderstorms.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk evt
near term... Kjc
short term... Evt
long term... Belk
aviation... Belk kjc evt
marine... Belk kjc evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 16 mi55 min 63°F1 ft
44013 - BOSTON 16 NM East of Boston, MA 25 mi95 min SSE 1.9 G 1.9 62°F 62°F1 ft1010.1 hPa (+0.5)62°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 25 mi95 min SSW 5.8 G 7.8 61°F 2 ft1010.4 hPa (+0.0)61°F
WAXM3 - Waquoit Bay Reserve, MA 29 mi100 min 1.9 65°F 1011 hPa63°F
BZBM3 - 8447930 - Woods Hole, MA 34 mi55 min 62°F 65°F1010.9 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 36 mi81 min 58°F 59°F2 ft1008.8 hPa
BHBM3 - 8443970 - Boston, MA 37 mi55 min 69°F 1009.2 hPa
44020 - NANTUCKET SOUND 38 mi45 min SW 9.7 G 12 64°F 66°F1010.8 hPa61°F
FRVM3 - 8447386 - Fall River, MA 39 mi61 min 69°F 68°F1010.9 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi55 min SW 12 G 14 67°F 1010.3 hPa
FRXM3 40 mi55 min 69°F 63°F
PVDR1 47 mi55 min WSW 4.1 G 7 72°F 1010.5 hPa65°F
CPTR1 - 8452944 - Conimicut Light, RI 47 mi55 min S 14 G 15 67°F 69°F1010.3 hPa
FOXR1 - 8454000 - Providence, RI 48 mi61 min WSW 6 G 8 74°F 66°F1009.8 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 49 mi61 min WSW 5.1 G 7 69°F 1010.6 hPa
NAXR1 - Narragansett Bay Reserve, RI 49 mi100 min SW 4.1 67°F 1011 hPa64°F
BUZM3 - Buzzards Bay, MA 49 mi85 min SW 11 G 12 61°F 1011.9 hPa (+0.5)
PRUR1 49 mi55 min 65°F 63°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, MA10 mi50 minVar 5 G 1110.00 miOvercast72°F64°F78%1010.2 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi33 minW 810.00 miOvercast70°F63°F79%1010.4 hPa
Provincetown Municipal Airport, MA18 mi29 minSSW 810.00 miOvercast67°F63°F87%1010.8 hPa
Otis Air National Guard Base, MA24 mi50 minSW 109.00 miOvercast64°F62°F94%1011.2 hPa

Wind History from GHG (wind in knots)
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Last 24hrNE8NE6NE9NE743Calm344Calm4Calm3CalmCalmCalmCalmSW3S54SW555
1 day agoE8E76
G12
SE8SE11SE6S54S4CalmCalmCalmCalmCalmCalmSE44E554SE6
G15
SE75NE7
2 days agoNE9NE8
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NE86E6NE3CalmCalmCalmCalm34CalmNE33CalmCalm4545NE7NE7
G12

Tide / Current Tables for Gurnet Point, Massachusetts
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Gurnet Point
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Sun -- 02:57 AM EDT     Moonset
Sun -- 03:19 AM EDT     0.46 feet Low Tide
Sun -- 05:07 AM EDT     Sunrise
Sun -- 09:28 AM EDT     8.84 feet High Tide
Sun -- 03:29 PM EDT     0.88 feet Low Tide
Sun -- 05:05 PM EDT     Moonrise
Sun -- 08:21 PM EDT     Sunset
Sun -- 09:45 PM EDT     9.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
63.61.50.50.71.73.55.87.78.78.77.96.44.32.31123.75.98.29.69.99.2

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Sun -- 01:15 AM EDT     0.03 knots Slack
Sun -- 02:57 AM EDT     Moonset
Sun -- 04:33 AM EDT     4.06 knots Max Flood
Sun -- 05:08 AM EDT     Sunrise
Sun -- 07:38 AM EDT     -0.13 knots Slack
Sun -- 10:22 AM EDT     -4.21 knots Max Ebb
Sun -- 01:37 PM EDT     0.19 knots Slack
Sun -- 04:54 PM EDT     4.08 knots Max Flood
Sun -- 05:04 PM EDT     Moonrise
Sun -- 07:58 PM EDT     -0.09 knots Slack
Sun -- 08:21 PM EDT     Sunset
Sun -- 10:49 PM EDT     -4.37 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3.2-1.52.53.6443.62.5-1.9-3.6-4.2-4.1-3.5-2.31.83.33.94.13.83-0.4-3.2-4.2-4.4

Weather Map and Satellite Images
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wmap_A
GOES 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 (12,3,4,5)
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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.