Tuesday, September18, 2018 L-36.com


Marine Weather and Tides
East Sandwich, MA

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Sunrise 6:24AMSunset 6:46PM Tuesday September 18, 2018 4:57 PM EDT (20:57 UTC) Moonrise 3:20PMMoonset 12:09AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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- 324 Pm Edt Tue Sep 18 2018
.small craft advisory in effect through Wednesday morning...
Tonight..NW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. Patchy fog. A chance of showers and scattered tstms this evening. Some tstms may produce heavy rainfall this evening. Vsby 1 to 3 nm, decreasing to 1 nm or less after midnight.
Wed..NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Patchy fog. Vsby 1 nm or less.
Wed night..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft.
Thu..NE winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft.
Thu night..SE winds 5 to 10 kt. Seas 2 to 3 ft.
Fri..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sat..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..NE winds 5 to 10 kt. Seas 2 to 3 ft.
Sun..E winds 5 to 10 kt. Seas 2 to 3 ft.
Sun night..SE winds around 5 kt. Seas around 2 ft. Winds and seas higher in and near tstms. 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 324 Pm Edt Tue Sep 18 2018
Synopsis for massachusetts and rhode island coastal waters.. Remnants of florence will move offshore by this evening. High pressure will bring north to northeast winds Wed and Thu. A warm front will push N of the waters Thu night, with s-sw winds possibly approach gale force Fri. A cold front will push across the waters early 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 East Sandwich, MA
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location: 41.75, -70.45     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 182051
afdbox
area forecast discussion
national weather service boston norton ma
451 pm edt Tue sep 18 2018

Synopsis
Showers and thunderstorms exit the south coast early this
evening followed by a drying trend and slightly cooler less
humid air behind the frontal passage. Northeast winds bring low
clouds, spotty light rain drizzle and patchy fog Wednesday
morning which slowly gives way to breaks of afternoon sunshine
from west to east. High pressure builds into new england wed
night and thu, yielding dry cool weather. Warmer Friday ahead
of an approaching cold front then turning cooler over the
weekend as high pressure builds into the area from the great
lakes.

Near term until 6 am Wednesday morning
4 pm update...

showers and t-storms associated with frontal boundary now along the
south coast at 330 pm. Front is progressive so convection will move
offshore shortly. However not much of an airmass change with the
wind shift behind this frontal boundary. Dew pts still 65-70
northward into central new england. Thus patchy fog possible
overnight especially given amount of standing water still exist
especially in areas that experienced 5-6 inches of rain in worcester
and middlesex counties (see public information statement for
details).

Despite rain ending across much of the region will continue with
flood headlines as rivers and streams continue to rise and may be
issuing river flood warnings in the very near future.

Later tonight and especially toward morning low pressure develops on
the departing front south of new england. This enhances the NE winds
across the region especially over eastern ma. Much of the model
guidance has some spotty low top showers and or drizzle and fog
developing in this NE flow from the gulf of maine late tonight over
eastern ma, possibly into ri as well.

Short term 6 am Wednesday morning through Wednesday night
Wednesday...

as frontal wave south of new england strengthens northeast flow
increase across the area during the morning. Much of the guidance
has low clouds and low top showers and or spotty drizzle and patchy
fog in this flow off the gulf of maine especially into ri and
eastern ma. Clouds may struggle to get into the ct river valley so
at least partial sunshine may prevail here along with milder
temperatures of 70-75.

Ne winds increasing up to around 25 mph will result in a cooler and
breezy day across CAPE cod and islands.

However as heights rise during the afternoon temps warm aloft and ne
winds ease as ocean low tracks farther offshore, breaks of sunshine
should develop all areas from west to east during the afternoon,
perhaps waiting until just before sunset across the CAPE and
islands.

Turning less humid with dew pts eventually falling into the upper
50s late in the day.

Wednesday night...

dry along with partial clearing as 1024 mb surface high over the
maritimes builds southward into new england. Cooler with dew pts in
the 50s. Given light winds, drier airmass and at least partly cloudy
have leaned toward the cooler MOS guidance for mins.

Long term Thursday through Tuesday
Highlights...

* fast wind flow aloft will bring changeable conditions into
next weekend
* a warm front pushes north Thu night early fri, followed by a
cold front late Fri night into early sat
* below normal temperatures through mid week, then briefly mild
late week before a return to cool readings
overview...

no major changes indicated in the 18 12z guidance. Still
skirting the edge between a mid level ridge to the south and a
closed circulation over hudson bay. Model suite is in rather
good agreement through the end of this week, so used a consensus
approach for this portion of the forecast.

Still expecting below normal temperatures Thursday, becoming
above normal Friday, then returning to near to slightly below
normal temperatures Sunday into Tuesday.

A low pressure moves across eastern canada Friday into Saturday.

The fronts associated with this system will be nearby Thursday
night into Saturday, resulting in a chance for showers. Most of
this time should remain dry across southern new england,
however.

Aviation 21z Tuesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ...

18z update...

thru 00z... Moderate confidence.

Line of showers and t-storms across southern ri and southeast ma
moves offshore 21z-23z with wind shift from ssw to nne. Across
ct and western ma MVFR trendingVFR while in the east across ri
and eastern ma. Ifr trending MVFR.

Tonight... Moderate confidence.

Vfr ct and western-central ma but MVFR-ifr stubborn to exit ri
and eastern ma. Drying trend this evening but low top showers,
drizzle and patchy fog may develop across eastern ma possibly
into ri late tonight as NE winds increase.

Wednesday... Moderate confidence.

Vfr western ct ma, MVFR-ifr across ri and eastern ma in low
clouds, drizzle, patchy fog and few low top showers. However
conditions lift improve in the afternoon to MVFR-vfr all
terminals.

Wednesday night... Moderate confidence.

Vfr but trending toward MVFR in lower clouds and areas of fog
late.

Kbos terminal... Improving trends this evening but later tonight
toward sunrise Wed low clouds, drizzle, patchy fog and few low
top showers may come onshore in NE flow.

Kbdl terminal... Improving trend this evening and overnight with
vfr Wed and dry runways.

Outlook Thursday through Sunday ...

Thursday: mainlyVFR, with local MVFR possible. Breezy.

Thursday night through Friday: mainlyVFR, with local MVFR
possible. Breezy. Slight chance shra.

Friday night: mainlyVFR, with local MVFR possible. Breezy.

Slight chance shra, isolated tsra.

Saturday:VFR. Breezy.

Saturday night:VFR.

Sunday:VFR. Slight chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ...

tonight...

frontal boundary slips north to south across the new england waters
with wind shift from ssw to nne. Toward morning nne winds 15-20 kt
with gusts up to 25 kt are possible. Shower and t-storms with
torrential downpours early this evening before exiting. Vsby may
lower late in patchy fog and drizzle especially eastern ma waters.

Wednesday...

nne winds 15-20 kt with gusts up to 25 kt especially eastern and
southern waters of ma. Vsby may lower in spotty light rain drizzle
and patchy fog in the morning but improving in the afternoon.

Wed night...

1024 mb high over maritimes builds southward into new england
resulting in diminishing winds and seas. Vsby should be good.

Outlook Thursday through Sunday ...

Thursday: winds less than 25 kt. Local rough seas.

Thursday night: winds less than 25 kt. Seas up to 5 ft.

Friday: moderate risk for small craft advisory winds with gusts
up to 30 kt. Seas up to 5 ft.

Friday night: moderate risk for small craft advisory winds with
gusts up to 30 kt. Areas of rough seas. Slight chance of rain
showers.

Saturday: winds less than 25 kt. Seas up to 5 ft.

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

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

Slight chance of rain showers.

Box watches warnings advisories
Ct... Flash flood watch until 2 am edt Wednesday for ctz004.

Ma... Flash flood watch until 2 am edt Wednesday for maz005>007-
012>019-026.

Ri... Flash flood watch until 2 am edt Wednesday for riz001>004.

Marine... Small craft advisory until 8 am edt Wednesday for anz231>235-
237.

Small craft advisory from 6 am to 6 pm edt Wednesday for
anz250.

Small craft advisory until 6 pm edt Wednesday for anz254>256.

Synopsis... Belk nocera
near term... Nocera
short term... Nocera
long term... Belk
aviation... Belk nocera
marine... Belk nocera


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 9 mi27 min 68°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 12 mi72 min 4.1 73°F 1007 hPa73°F
BZBM3 - 8447930 - Woods Hole, MA 20 mi39 min 71°F 72°F1007.3 hPa
44020 - NANTUCKET SOUND 20 mi37 min W 19 G 27 72°F 72°F1006.8 hPa71°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 35 mi127 min S 7.8 G 9.7 68°F 3 ft1006.3 hPa (+0.3)68°F
NTKM3 - 8449130 - Nantucket Island, MA 37 mi39 min SW 7 G 12 73°F 73°F1007 hPa
FRVM3 - 8447386 - Fall River, MA 38 mi45 min 71°F 73°F1007.6 hPa
FRXM3 39 mi39 min 72°F 70°F
BUZM3 - Buzzards Bay, MA 39 mi57 min W 8.9 G 8.9 70°F 1007.7 hPa (+0.3)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi39 min N 5.1 G 6 72°F 1007.2 hPa
44013 - BOSTON 16 NM East of Boston, MA 43 mi127 min N 9.7 G 9.7 67°F 68°F2 ft1005.6 hPa (-0.0)67°F
CPTR1 - 8452944 - Conimicut Light, RI 47 mi39 min N 9.9 G 12 71°F 73°F1007.4 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi72 min NNE 4.1 72°F 1007 hPa72°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi45 min NE 4.1 G 7 71°F 1007.3 hPa
NWPR1 - 8452660 - Newport, RI 49 mi45 min WSW 4.1 G 6 72°F 69°F1006.9 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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SW5
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NE3
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--
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G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA7 mi62 minW 109.00 miThunderstorm in Vicinity72°F71°F100%1007.4 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA10 mi61 minWSW 94.00 miThunderstorm Rain Fog/Mist73°F71°F94%1006.8 hPa
Plymouth, Plymouth Municipal Airport, MA19 mi65 minNW 52.50 miThunderstorm in Vicinity Rain Fog/Mist71°F70°F96%1007.2 hPa
Provincetown Municipal Airport, MA22 mi61 minW 43.00 miLight Rain Fog/Mist70°F69°F97%1006.8 hPa

Wind History from FMH (wind in knots)
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Last 24hrSW12SW8SW6S4S4SW6SW5S4SW4SW7SW5S5S6S7S7
G15
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G21
SW17
G30
S17
G24
SW21
G32
SW21
G29
SW21SW19
G26
W14
G28
W8
1 day agoS7S7S5S4S4S4CalmCalmCalmCalmCalmCalmCalmCalmCalmSW6SW9SW9W12SW10
G16
SW9
G14
SW9
G15
SW14SW11
G17
2 days agoSE7SW4SE4SE4SW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW5S4SW6S3S4S4
G11
S6S7

Tide / Current Tables for Cape Cod Canal (East Entrance), Massachusetts
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Tide / Current data from XTide NOT FOR NAVIGATION
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Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (16,3,4,5)
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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.