Thursday, August24, 2017 L-36.com


Marine Weather and Tides
North Eastham, MA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 5:58AMSunset 7:27PM Thursday August 24, 2017 12:48 AM EDT (04:48 UTC) Moonrise 8:56AMMoonset 9:15PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 854 Pm Edt Wed Aug 23 2017
Overnight..NW winds around 5 kt. Seas 1 to 2 ft.
Thu..NW winds 5 to 10 kt, becoming ne in the afternoon. Seas 1 foot or less.
Thu night..SE winds around 5 kt, becoming nw after midnight. Seas 1 foot or less.
Fri..N winds 5 to 10 kt. Seas 1 foot or less. Patchy dense fog. Vsby 1 nm or less.
Fri night..SW winds around 5 kt, becoming nw after midnight. Seas 1 foot or less.
Sat..N winds 5 to 10 kt. Seas 1 foot or less.
Sat night..S winds around 5 kt, becoming W after midnight. Seas 1 foot or less.
Sun..N winds 5 to 10 kt. Seas 1 foot or less.
Sun night..NE winds 5 to 10 kt. Seas 1 foot or less.
Mon..NE winds 5 to 10 kt. Seas 1 foot or less.
Mon night..NE winds 5 to 10 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 854 Pm Edt Wed Aug 23 2017
Synopsis for massachusetts and rhode island coastal waters.. Large high pres will then build in from the west Thu and remain in control through the weekend resulting in quiet weather. 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 North Eastham, MA
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location: 41.92, -70.03     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 240102
afdbox
area forecast discussion
national weather service taunton ma
902 pm edt Wed aug 23 2017

Synopsis
High pressure brings dry weather with very comfortable humidity
levels through early next week.

Near term until 6 am Thursday morning
9 pm update...

the cold front has pretty much cleared the CAPE islands this
evening and much drier air has worked into the region. Light
winds and mainly clear skies will result in an ideal night of
radiational cooling. Low temps will bottom out well down into
the 50s by daybreak in many locations. A touch of patchy ground
fog is possible toward daybreak, but any of that will be
confined to the most prone locations.

Short term 6 am Thursday morning through Thursday night
A large high pressure over central canada will move slowly east
Thursday and Thursday night. A mid level trough and shortwave
should pass by our region before this high pressure really takes
control of our weather. The lower level of the atmosphere are so
dry, not expecting more than some clouds at times during this
period.

Near to slightly below normal temperatures expected through this
period.

Long term Friday through Wednesday
Not too much change with the 23.12z models particularly with
the synoptic pattern across the CONUS through mid next week.

Reinforced alaskan vortex is the driver for enhanced warm
advection downstream, even as the pattern across the W becomes
more zonal. Ridging amplifies through the N CONUS and central
canada as a result, and while this maintains a longwave trof
across new england, the mean flow into new england is a cool and
dry cp draw. Mean sw-ne oriented jet remains entrenched
directly over new england within confluent flow, E of the trof
baseline. This will help to maintain the slow passage of a
1025+hpa high pres, which will lead to generally dry conditions
through mid week.

There are two opportunities for spot showers. The first is
Friday when a relatively robust shortwave rotates through the
region coincident with a slight uptick in pwats to just shy of
1.00 inches. Mid lvl lapse rates are high enough to enhance the
risk. Will continue to time some slight chance pops through the
afternoon. The second is Sunday with a similar situation, but
overall weaker dynamics and actually less moisture. Each day
will feature only hit-or-miss showers as even at its peak near
1.00 inches, pwats remain very low through the period.

Seasonably cool temperatures will accompany this nearly week
long dry period. H85 temps drop to between +5c and +8c at their
coolest point following the Friday wave passage and then remain
generally within this range through mid next week. Full mixing
suggests mid-upper 70s for highs, however as the high pres
shifts into the maritimes sun-tue, flow will shift toward the e,
drawing air off the gulf of maine and leading to cooler highs as
a result. Mins will be comfortable thanks to dewpoints holding
in the upper 40s and low-mid 50s through the period, suggesting
the lows will drop into the 50s most night. All-in-all, temps
will remain below normal throughout.

Aviation 01z Thursday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ...

tonight... High confidence.

Vfr except for a touch of patchy ground fog possible toward
daybreak in the typically prone locations. Winds slacken to
light and variable or calm.

Thursday and Thursday night... High confidence.

Vfr. Sea breezes likely to develop, but generally a couple of
hours later than typical timing.

Kbos terminal... High confidence in taf. Sea breeze would be a
later start than normal on Thursday.

Kbdl terminal... High confidence in taf.

Outlook Friday through Monday ...

vfr. Light flow generally NW through Sunday, then shifting
toward the E Monday. Sea breezes possible all days.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ... High confidence.

Relatively light winds and seas through this period. Local
seabreezes possible Thursday from mid morning into the evening.

Outlook Friday through Monday ...

good boating weather. Weak n-nw winds will shift to the E by
Monday but with gusts generally remaining below 20 kt.

Seas waves remain below 4 ft through the period.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk doody
near term... Frank
short term... Belk
long term... Doody
aviation... Belk doody
marine... Belk doody


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 17 mi44 min 69°F1 ft
44020 - NANTUCKET SOUND 34 mi58 min NNW 5.8 G 7.8 73°F 72°F1 ft1010.5 hPa (+1.0)69°F
WAXM3 - Waquoit Bay Reserve, MA 35 mi63 min Calm 1011 hPa
NTKM3 - 8449130 - Nantucket Island, MA 44 mi48 min N 1.9 G 2.9 1010.8 hPa (+0.9)
BZBM3 - 8447930 - Woods Hole, MA 44 mi48 min 71°F 73°F1010.7 hPa (+0.8)
44013 - BOSTON 16 NM East of Boston, MA 44 mi58 min W 5.8 G 7.8 68°F 66°F2 ft1009.9 hPa (+0.5)

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Provincetown Municipal Airport, MA11 mi52 minWNW 610.00 miFair68°F57°F68%1010.7 hPa
Chatham, Chatham Municipal Airport, MA15 mi56 minN 010.00 miFair64°F60°F87%1010.9 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA21 mi52 minNW 310.00 miFair64°F55°F75%1010.3 hPa

Wind History from PVC (wind in knots)
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Last 24hrSW18
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SW10SW11S10SW12SW10SW9SW6NW6N43NW3NW4NW5NW5W6W7W6
1 day agoSW7SW6SW7S6S9S9SW10S12SW10S10SW11SW13
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2 days agoW6W5W5W6W6SW3W5W4W7W6W7W7SW4SW8S6S9S8SW13SW11S8SW7SW9SW9SW8

Tide / Current Tables for Wellfleet, Massachusetts
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Wellfleet
Click for Map
Thu -- 01:40 AM EDT     11.81 feet High Tide
Thu -- 05:57 AM EDT     Sunrise
Thu -- 08:09 AM EDT     -0.89 feet Low Tide
Thu -- 08:55 AM EDT     Moonrise
Thu -- 02:08 PM EDT     11.21 feet High Tide
Thu -- 07:26 PM EDT     Sunset
Thu -- 08:29 PM EDT     -0.41 feet Low Tide
Thu -- 09:14 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.511.411.710.78.65.92.90.3-0.9-0.21.84.57.610.111.210.79.26.94.11.5-0.2-0.21.53.9

Tide / Current Tables for Cape Cod Lighthouse, SE of, Cape Cod, Massachusetts
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Cape Cod Lighthouse
Click for Map
Thu -- 01:37 AM EDT     8.99 feet High Tide
Thu -- 05:57 AM EDT     Sunrise
Thu -- 07:50 AM EDT     -0.68 feet Low Tide
Thu -- 08:55 AM EDT     Moonrise
Thu -- 02:06 PM EDT     8.54 feet High Tide
Thu -- 07:26 PM EDT     Sunset
Thu -- 08:10 PM EDT     -0.31 feet Low Tide
Thu -- 09:14 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.48.88.986.341.7-0.1-0.70.21.83.96.17.88.58.16.84.92.70.7-0.30.11.53.4

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 (0,6,7,8)
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Ground Weather Radar Station Boston, MA
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weather_mapweather_map weather_map

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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.