Thursday, November23, 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 6:39AMSunset 4:15PM Thursday November 23, 2017 9:35 AM EST (14:35 UTC) Moonrise 11:39AMMoonset 9:36PM Illumination 24% 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- 716 Am Est Thu Nov 23 2017
Today..NW winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt this afternoon. Seas 2 to 4 ft.
Tonight..W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas around 2 ft.
Fri..SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft.
Fri night..SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..W winds 5 to 10 kt, becoming nw 10 to 15 kt after midnight. Seas 1 foot or less. A chance of showers.
Sun..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sun night..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft.
Mon..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Mon night..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 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 Am Est Thu Nov 23 2017
Synopsis for massachusetts and rhode island coastal waters.. High pressure will build over the waters today and tomorrow. Unsettled weather returns on Sat as low pres moves east across southern quebec. Gusty northwest winds follow on Sun ahead of high pres building towards the east coast. High pressure to follow into early next week. 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 231209
afdbox
area forecast discussion
national weather service taunton ma
709 am est Thu nov 23 2017

Synopsis
Quiet weather through Friday with dry and cool conditions.

Milder air returns Saturday ahead of a cold front, but will
have to watch a coastal storm to the southeast. Blustery and
cooler weather follows Sunday into Monday, then dry and milder
conditions again Tuesday into Wednesday.

Near term until 6 pm this evening
No major changes to the forecast this morning. Brought the
forecast back in line with observed trends.

Previous discussion... .

Chilly start to thanksgiving as high pressure from the great
lakes builds into the mid-atlantic. This will lead to dry
weather and sunny skies to start the day. Northwest winds will
begin to back to the west as flow aloft because a bit more
zonal. This will warm 925mb temps closer to -1 to -2 c compared
to the -5c we are starting out with this morning. This will help
push temps into the upper 30s to low 40s.

Weak shortwave aloft will increase cloud cover during the later
half of the day. Moisture associated with this wave is meager
enough to lead the forecast dry. Cross sections also support
this with just high level clouds passing through. Overall, a
chilly but dry turkey day as temperatures will remain 5 to 10
degrees below normal.

Short term 6 pm this evening through 6 pm Friday
Trough axis will push through the region this evening and slide
to the north tonight. Mid to high level clouds will stream
through as guidance continues to show some moisture for the
first half of the night. 925mb jet will be on the increase along
the passing wave resulting in a few gusts during the overnight
hours. Best location is along the shoreline where waters will
help increase the mixing. While the jet could limit radiational
cooling, expect overnight inversion to limit the mixing across
the interior.

Aside from the cloud cover, dry weather will prevail. Expect
temperatures in the mid 20s with metro region in the low 30s.

High pressure will allow for dry weather once again on Friday.

Developing ridge aloft will result in a more southerly flow. This
will help push temps to be warmer than today. Highs should reach
into the upper 40s to low 50s.

Long term Friday night through Wednesday
Highlights...

* warming Sat with a low risk of showers
* blustery and cooler Sun mon
* turning mild again Tue Wed with mainly dry conditions
overview...

23 00z guidance suite is in good overall agreement through
Saturday, then the detail differences start to become
significant early next week. It will likely be a few more days
before these differences resolve, when the energy involved gets
better sampled by moving over north america. Have only moderate
confidence in the details after Sunday.

In general, expecting a variable temperature pattern, with near
normal temperatures Saturday and the middle of next week. In
between, below normal temperatures are anticipated.

Mainly dry weather through this portion of the forecast. Low
risk for some showers late Saturday into Saturday night as a
cold front moves across southern new england. Moisture will be
the main limitation, but thinking the greater risk will be
towards the coast, where proximity to the ocean and interaction
with an offshore low pressure may be enough to increase shower
coverage.

The forecast for the middle of next week remains uncertain.

Current indications suggest a period of drier and warmer
weather. However, large disagreements in the handling of a
significant trough moving into the pacific northwest Monday
complicate the forecast through Wednesday. The resulting timing
differences will mean the difference between a warm and dry
Wednesday, or a cooler and wetter day.

Aviation 12z Thursday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

Today and tonight...VFR with W to NW winds through the period.

Friday...VFR with winds backing to the south, but remaining
light.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Friday night through Monday ...

Friday night:VFR. Breezy.

Saturday:VFR. Breezy. Slight chance shra.

Saturday night:VFR. Chance shra.

Sunday through Monday:VFR. Breezy.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ...

decided to cancel the small craft advisory for CAPE cod bay as
recent observations indicate wind gusts are less than 25 kt.

Buoy in the bay also showed wave heights less than 5 feet.

Previous discussion...

winds shift to the w, with gusts generally remaining below 20 kt
after sunrise. Seas however will take some time to fully
diminish, and will require small craft advisories to linger
much of the day. Winds will shift to a more southerly direction
on Friday and will begin to increase during the evening.

Advisories for the ocean waters have been extended for the outer
waters into tomorrow given 5 ft lingering swells are expected.

Outlook Friday night through Monday ...

Friday night: low risk for small craft advisory winds with
gusts up to 25 kt. Seas up to 5 ft.

Saturday: winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers.

Saturday night: winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers.

Sunday: moderate risk for small craft advisory winds with gusts
up to 25 kt. Local rough seas. Slight chance of rain showers.

Sunday night: low risk for small craft advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft.

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 6 pm est this evening for anz235-
237.

Small craft advisory until 7 am est Friday for anz250.

Small craft advisory until 1 pm est Friday for anz254>256.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 17 mi66 min 50°F4 ft
44020 - NANTUCKET SOUND 34 mi46 min NW 14 G 19 36°F 48°F2 ft1016.5 hPa (+0.6)28°F
WAXM3 - Waquoit Bay Reserve, MA 35 mi111 min 2.9 33°F 1017 hPa24°F
NTKM3 - 8449130 - Nantucket Island, MA 44 mi48 min NNW 8 G 12 37°F 47°F1016.6 hPa
BZBM3 - 8447930 - Woods Hole, MA 44 mi48 min 38°F 50°F1016.8 hPa
44013 - BOSTON 16 NM East of Boston, MA 44 mi46 min NW 16 G 19 35°F 51°F4 ft1015.5 hPa (+0.9)

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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G26
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G23
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G25
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G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Provincetown Municipal Airport, MA11 mi40 minNW 15 G 1910.00 miFair36°F21°F57%1016.5 hPa
Chatham, Chatham Municipal Airport, MA15 mi44 minVar 610.00 miFair39°F27°F62%1016.7 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA21 mi40 minNNW 8 G 1510.00 miFair37°F26°F65%1015.9 hPa

Wind History from PVC (wind in knots)
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Last 24hrCalmE3CalmE7CalmE7E6NW20
G26
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G31
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G33
NW25
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1 day agoSW13SW19
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S9SW14SW18
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SW13SW11SW7SW8S7S7S6S4SE5S4W5
2 days agoW26
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--SW16
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G24
SW14SW13SW10SW16
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SW19SW15
G24
SW16
G25

Tide / Current Tables for Wellfleet, Massachusetts
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Wellfleet
Click for Map
Thu -- 02:19 AM EST     9.33 feet High Tide
Thu -- 06:39 AM EST     Sunrise
Thu -- 08:31 AM EST     1.65 feet Low Tide
Thu -- 10:38 AM EST     Moonrise
Thu -- 02:24 PM EST     10.14 feet High Tide
Thu -- 04:13 PM EST     Sunset
Thu -- 08:36 PM EST     Moonset
Thu -- 09:03 PM EST     0.72 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.38.29.39.186.44.731.81.83.25.17.18.9109.98.8753.11.50.71.43

Tide / Current Tables for Cape Cod Lighthouse, SE of, Cape Cod, Massachusetts
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Cape Cod Lighthouse
Click for Map
Thu -- 02:17 AM EST     7.11 feet High Tide
Thu -- 06:39 AM EST     Sunrise
Thu -- 08:12 AM EST     1.26 feet Low Tide
Thu -- 10:38 AM EST     Moonrise
Thu -- 02:22 PM EST     7.73 feet High Tide
Thu -- 04:12 PM EST     Sunset
Thu -- 08:36 PM EST     Moonset
Thu -- 08:44 PM EST     0.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
56.47.16.964.73.321.31.62.84.25.66.97.77.56.65.13.520.90.61.32.6

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 (9,2,3,4)
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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.