Tuesday, October17, 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 6:55AMSunset 5:56PM Tuesday October 17, 2017 7:25 AM EDT (11:25 UTC) Moonrise 4:26AMMoonset 5:13PM Illumination 9% Phase: Waning Crescent; Moon at 27 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 Edt Tue Oct 17 2017
.small craft advisory in effect until 2 pm edt this afternoon...
Today..N winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt this afternoon. Seas 2 to 4 ft.
Tonight..SW winds 5 to 10 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Wed..W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 2 ft.
Wed night..SW winds around 5 kt. Seas 1 foot or less.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
Thu night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri..NW winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.
Fri night..NW winds 5 to 10 kt. Seas around 2 ft.
Sat..W winds 5 to 10 kt. Seas 1 foot or less.
Sat night..SW 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 716 Am Edt Tue Oct 17 2017
Synopsis for massachusetts and rhode island coastal waters.. Large high pressure will settle across the waters this week. A cold front is expected to cross the region early Fri. 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 CDP, MA
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location: 41.92, -70.03     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 170723
afdbox
area forecast discussion
national weather service taunton ma
323 am edt Tue oct 17 2017

Synopsis
High pressure will maintain dry weather this week along with a
gradual warming trend.

Near term until 6 pm this evening
Shortwave has pushed offshore and clearing has set in across
most of sne in drying and subsidence behind it. Exception is
near CAPE cod and islands, where northerly flow over milder
ocean was producing some ocean effect clouds (and a few showers
earlier). Trend will be for clearing by mid morning, as upper
flow turns more anticyclonic and northerly flow begins to back
to west.

Flow may weaken enough to allow sea breeze to develop around
midday along eastern ma coast, but our thinking is there will
be just enough mixing to prevent that from happening. Winds do
turn more W SW this afternoon.

Many locations will be off to a cold start with temperatures in
30s and areas of frost. We are keeping frost advisory posted
until 8 am. Airmass doesn't recover too much today but sunshine
will help temperatures reach well into 50s, if not near 60 in a
few locations.

Short term 6 pm this evening through 6 pm Wednesday
High pressure becomes centered south of new england, putting
us in SW flow tonight and wed. Clear skies and light winds will
allow for radiational cooling tonight, so we undercut mos
guidance, and there is potential for patchy frost across
interior once again. Frost advisories will probably need to be
re-issued later this morning, once we assess this morning's
lows and decide which zones will remain active for frost freeze
program.

On wed, we begin the warmup with increasing SW flow. Airmass
remains very dry through column so plenty of sunshine is
expected. This should boost highs into 60s and lower 70s.

Long term Wednesday night through Monday
* highlights...

- warmer than normal through this period
- dry weather through this weekend
this portion of the forecast will feature a nearly zonal mid
level flow evolving into a strong ridge toward this weekend.

This will mean a warming trend, and above normal temperatures.

Almost no moisture to work within the lowest levels of the
atmosphere, so mainly clear skies expected until later this
weekend. This should even be the case for a weak cold frontal
passage late Thursday into Friday.

Operational and ensemble guidance agree on the overall pattern,
but do have some detail differences. Will continue to favor a
consensus approach to smooth over the less predictable details.

Aviation 07z 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 ... High confidence.

MVFR ceilings near CAPE cod and islands will scatter out toward
sunrise, leavingVFR conditions today into wed. N winds gusting
to 20-25kt on CAPE cod and islands this morning will diminish by
afternoon as winds turn to W SW areawide.

Kbos terminal... High confidence in taf. Brief weak sea breeze
possible 15z-19z but not included in TAF since it looks
marginal.

Kbdl terminal... High confidence in taf.

Outlook Wednesday night through Saturday ... High confidence.

MainlyVFR through the period except some patchy ground fog at
typically prone terminals each morning.

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.

Maintaining small craft advisories, mainly through this morning
for lingering 25kt gusts and 5 ft seas, except on outer waters e
of CAPE cod where seas will take most of day to subside. Winds
diminish this afternoon and become w, before SW flow prevails
tonight and wed.

Outlook Wednesday night through Saturday ... High confidence.

Mainly tranquil boating weather expected across the coastal
waters through this period. The exception should be a period
late Thursday into Friday morning when a dry cold front crosses
the waters. Wind gusts may reach up to 25 kt behind this front.

Seas may approach 5 feet as well, especially across the outer
coastal waters. Small craft advisories may be needed for at
least a portion of the waters late Thursday into Friday.

Box watches warnings advisories
Ct... Frost advisory until 8 am edt this morning for ctz002>004.

Ma... Frost advisory until 8 am edt this morning for maz005-006-
009>014-017-018-020-021-026.

Ri... Frost advisory until 8 am edt this morning for riz001-003-006.

Marine... Small craft advisory until 2 pm edt this afternoon for anz231-
250-251.

Small craft advisory until 5 pm edt this afternoon for anz254-
255.

Small craft advisory until noon edt today for anz256.

Synopsis... Belk jwd
near term... Jwd
short term... Jwd
long term... Belk
aviation... Belk jwd
marine... Belk jwd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 17 mi25 min 59°F5 ft
44020 - NANTUCKET SOUND 34 mi35 min N 19 G 25 50°F 62°F3 ft1022.1 hPa (+2.1)44°F
WAXM3 - Waquoit Bay Reserve, MA 35 mi100 min 5.1 44°F 1023 hPa39°F
NTKM3 - 8449130 - Nantucket Island, MA 44 mi37 min N 16 G 19 51°F 61°F1022.9 hPa
BZBM3 - 8447930 - Woods Hole, MA 44 mi37 min 46°F 64°F1023.5 hPa
44013 - BOSTON 16 NM East of Boston, MA 44 mi35 min NNW 16 G 19 47°F 59°F5 ft1022.7 hPa (+1.9)

Wind History for Nantucket Island, MA
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Last
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Provincetown Municipal Airport, MA11 mi29 minNNE 10 G 2010.00 miMostly Cloudy48°F32°F54%1023.5 hPa
Chatham, Chatham Municipal Airport, MA15 mi33 minN 610.00 miFair47°F34°F61%1023.2 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA21 mi29 minN 15 G 2110.00 miPartly Cloudy49°F33°F55%1022.6 hPa

Wind History from PVC (wind in knots)
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Last 24hrW8W11W13
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N13N13N10N10NW11NW11
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1 day agoS4S4S7S9S9SW9
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2 days agoS6S5S7SW7SW6SW5CalmN5NE5E5NE3CalmNW3--N3CalmCalmS3CalmCalmS3S4SW3SW4

Tide / Current Tables for Wellfleet, Massachusetts
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Wellfleet
Click for Map
Tue -- 04:18 AM EDT     -0.11 feet Low Tide
Tue -- 04:26 AM EDT     Moonrise
Tue -- 06:55 AM EDT     Sunrise
Tue -- 10:21 AM EDT     10.89 feet High Tide
Tue -- 04:42 PM EDT     0.01 feet Low Tide
Tue -- 05:13 PM EDT     Moonset
Tue -- 05:55 PM EDT     Sunset
Tue -- 10:42 PM EDT     11.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.66.33.61.1-00.21.74.17.19.610.810.79.57.54.92.20.40.11.23.26.18.910.611

Tide / Current Tables for Cape Cod Lighthouse, SE of, Cape Cod, Massachusetts
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Cape Cod Lighthouse
Click for Map
Tue -- 03:59 AM EDT     -0.09 feet Low Tide
Tue -- 04:26 AM EDT     Moonrise
Tue -- 06:55 AM EDT     Sunrise
Tue -- 10:19 AM EDT     8.30 feet High Tide
Tue -- 04:23 PM EDT     0.01 feet Low Tide
Tue -- 05:13 PM EDT     Moonset
Tue -- 05:54 PM EDT     Sunset
Tue -- 10:40 PM EDT     8.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.44.52.30.5-0.10.41.73.55.77.48.28.17.15.43.31.20.10.21.22.9578.28.3

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 (7,2,3,4)
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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.