Friday, November16, 2018 L-36.com


Marine Weather and Tides
Barnstable Town, MA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:31AMSunset 4:21PM Friday November 16, 2018 2:48 PM EST (19:48 UTC) Moonrise 2:21PMMoonset 12:20AM Illumination 63% 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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ANZ232 Nantucket Sound- 223 Pm Est Fri Nov 16 2018
.gale warning in effect until 1 am est Saturday...
Rest of today..NW winds 20 to 25 kt with gusts up to 40 kt. Seas around 5 ft. A slight chance of showers.
Tonight..W winds 15 to 20 kt with gusts up to 35 kt. Seas around 4 ft.
Sat..W winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Gusts up to 25 kt. Seas 3 to 4 ft.
Sat night..W winds 5 to 10 kt, becoming nw 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 2 ft.
Sun..N winds 5 to 10 kt. Seas around 2 ft.
Sun night..S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas 1 foot or less, then around 2 ft after midnight. A chance of showers after midnight.
Mon..SW winds 10 to 15 kt, becoming W in the afternoon. Gusts up to 20 kt. Seas around 2 ft. A chance of showers in the morning.
Mon night..NW winds 15 to 20 kt with gusts up to 25 kt. Seas around 3 ft.
Tue..NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Tue night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 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 223 Pm Est Fri Nov 16 2018
Synopsis for massachusetts and rhode island coastal waters.. A coastal storm moves moves across southeast new england by midday and then moves off to the maritimes. This will bring strong winds to the waters this morning and midday. High pressure returns for the weekend. A cold front passes across the waters on Sunday. 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 Barnstable Town, MA
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location: 41.63, -70.31     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 161820
afdbox
area forecast discussion
national weather service boston norton ma
120 pm est Fri nov 16 2018

Synopsis
Dry and chilly weather continues into Sunday morning. Weak
low pressure may bring patchy light rain and or snow
late Sunday into Monday. Another shot of colder air moves in by
the middle of next week, though it should be mainly dry.

Near term until 6 pm this evening
120 pm update...

a cold and blustery day with considerable cloudiness was the
main story early this afternoon behind the departing low
pressure system. A few left over light rain snow showers
across central and northeast ma will come to an end shortly. It
was still breezy in many locations and rather windy across the
cape islands with cold NW low level flow mixing quite well over
the milder sst. Temperatures will generally be in the 30s for
the remainder of the afternoon.

Short term 6 pm this evening through Saturday night
A broad upper trough lingers over hudson bay through Saturday
night. Several shortwaves move through this flow and over
southern new england. 500-mb heights remain near to below
normal through the period. Normal values are 557 to 563
decameters, while forecast values are in the 540s today and
550-555 Saturday.

One shortwave moves across southern new england early tonight.

This may be enough to generate scattered snow showers,
especially across northern massachusetts. These snow showers
should move out of state before midnight.

Cold advection will maintain some level of mixing tonight and
Saturday. Low level winds will be 30-35 kts tonight and 20-25
kts Saturday. Expect most or all of this wind to mix to the
surface in gusts tonight and Saturday.

Moisture cross sections show diminishing moisture aloft on
Saturday. This suggests a dry day, allowing for sunshine.

Temperatures upstream are in the upper 20s and lower 30s... This
should suffice for tonight's min temps. Mixing on Saturday
should reach 925 mb, where temps will support MAX surface temps
in the 40s. Min temps farther upstream point to Saturday night
mins in the mid 20s to lower 30s.

Long term Sunday through Thursday
Highlights...

* no changes to Thursday afternoon long term forecast for this
period.

* below average temperatures persist
* weak low pressure brings periods of rain and snow late Sun into
mon
* dry and cold mid week
overview...

the extended forecast features a few high pressure systems sandwiched
around a relatively weak low pressure disturbance or two in the
Sunday night Monday time frame which will bring the return of
both rain and snow chances. Model consensus is good that the
flow pattern becomes much less amplified and more zonal behind
Friday's system, persisting through late weekend. By then a mid
level shortwave digs south, crossing the region Sunday Monday
which will generate a weak surface low in the vicinity of sne
with another round of light snow rain. Beyond this, models
diverge a bit, with the GFS keeping things unsettled into
Tuesday before the high returns, while the euro returns a dry
high pressure more quickly. Either way, by mid to late week
heights begin to rise ever so slightly and a cold and dry
pattern returns.

Details...

Sunday and Monday...

Sunday high pressure sits over the northeast with light winds and
highs in the upper 30s-40s under a cold airmass; should be a mostly
dry day before snow rain chances increase from the west by the
evening overnight hours. The upper trough over canada digs south
helping to generate a surface low in the vicinity of sne which
brings weak fronts through in quick succession Sunday
night Monday. Still expecting mainly snow outside the coastal
plain, with rain along the coasts. QPF amounts are lackluster; a
few hundredths to a few tenths of liquid equivalent.

Tuesday through Thursday...

after the system exits zonal flow returns at the base of a large 500
mb trough over the eastern us Tuesday early Wednesday. Some
disagreement on slight precip chances Tuesday, but overall looks
dry; maybe some showers over the high terrain. By mid week a
surface high returns bringing dry weather. Given the overall
weak longwave trough pattern, cold temperatures will persist
with highs in the 30s and low 40s.

Aviation 18z Friday through Wednesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ...

this afternoon... Moderate to high confidence. Mainly MVFR
ceilings early this afternoon with ifr conditions focused
across the CAPE islands. We should see conditions improve
through the afternoon to mainly MVFR with even someVFR
conditions at times. NW wind gusts of 20 to 25 knots in most
locations, with some 30 to 40 knots on the CAPE islands should
gradually diminish through early evening.

Tonight... Moderate to high confidence. MainlyVFR but some
marginal MVFR CIGS possible at times especially across the
interior. Westerly wind gusts diminish to between 15 and 20
knots.

Saturday and Saturday night... High confidence. MainlyVFR but
some marginal MVFR CIGS are possible generally during the
daylight hours across the interior. Westerly wind gusts up to
around 20 knots are expected Saturday afternoon.

Kbos terminal... Moderate to high confidence in taf.

Kbdl terminal... Moderate to high confidence in taf.

Outlook Sunday through Tuesday ...

Sunday: mainlyVFR, with local ifr possible. Slight chance sn.

Sunday night: mainly ifr, with local MVFR possible. Chance sn,
slight chance ra.

Monday: MVFR ifr conditions possible. Breezy. Chance sn, slight
chance ra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ... High confidence.

Today... We downgraded the remaining storm headlines to gales
with strong small craft across boston harbor narr bay. Seas
remain quite high but will continue to gradually lower through
the early evening hours.

Tonight... West winds at 20 kt gusting to 30 kt. Seas 8 to 12
feet slowly subsiding during the night.

Saturday... West winds gusting 20 to 25 kt. Seas slowly
diminishing, but the outer waters will remain with 5 foot seas.

Saturday night... Winds less than 25 kt. Seas diminishing below
5 feet on the outer waters.

Outlook Sunday through Tuesday ...

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

Sunday night: winds less than 25 kt. Slight chance of rain.

Local visibility 1 to 3 nm.

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

Slight chance of rain.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Frank wtb bw
near term... Frank
short term... Wtb
long term... Bw
aviation... Frank bw
marine... Frank wtb bw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44020 - NANTUCKET SOUND 10 mi28 min WNW 21 G 27 39°F 49°F1000.3 hPa36°F
WAXM3 - Waquoit Bay Reserve, MA 12 mi63 min 8 39°F 1000 hPa37°F
44090 15 mi18 min 51°F7 ft
BZBM3 - 8447930 - Woods Hole, MA 20 mi30 min 37°F 48°F1001.3 hPa
NTKM3 - 8449130 - Nantucket Island, MA 26 mi30 min NW 12 G 18 41°F 45°F1000.3 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 41 mi58 min NW 31 G 37 38°F 15 ft996.9 hPa (+7.0)36°F
BUZM3 - Buzzards Bay, MA 42 mi48 min WNW 24 G 26 39°F 1001.9 hPa (+8.0)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi30 min WNW 14 G 18 39°F 1002.6 hPa
FRVM3 - 8447386 - Fall River, MA 46 mi36 min 38°F 54°F1002.9 hPa
FRXM3 46 mi30 min 39°F 33°F

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hyannis, Barnstable Municipal-Boardman Airport, MA4 mi52 minWNW 8 G 216.00 miFog/Mist38°F36°F93%999.1 hPa
Otis Air National Guard Base, MA11 mi53 minNW 13 G 208.00 miOvercast36°F33°F93%1000 hPa
Chatham, Chatham Municipal Airport, MA18 mi56 minNW 13 G 294.00 miLight Rain Fog/Mist39°F36°F89%998.8 hPa
Marthas Vineyard Airport, MA22 mi55 minNW 15 G 2210.00 miOvercast38°F35°F89%1000.3 hPa

Wind History from HYA (wind in knots)
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Last 24hrE4NE4NE5E5SE9E6E6
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1 day agoW12
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N6NW7W6NW9N4N6W6NW5NW5NW5N7NE5E5E4
2 days agoSW19
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G20
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G26
NW12
G32
NW15
G24
NW16
G26

Tide / Current Tables for Hyannis Port, Nantucket Sound, Massachusetts
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Hyannis Port
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Fri -- 06:31 AM EST     Sunrise
Fri -- 06:37 AM EST     2.76 feet High Tide
Fri -- 12:00 PM EST     0.58 feet Low Tide
Fri -- 01:20 PM EST     Moonrise
Fri -- 04:20 PM EST     Sunset
Fri -- 06:50 PM EST     2.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.611.41.92.42.72.72.521.30.80.60.81.11.51.92.42.72.92.62.11.50.8

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Fri -- 12:14 AM EST     3.59 knots Max Flood
Fri -- 03:56 AM EST     -0.02 knots Slack
Fri -- 06:32 AM EST     Sunrise
Fri -- 06:35 AM EST     -3.61 knots Max Ebb
Fri -- 09:43 AM EST     0.15 knots Slack
Fri -- 12:37 PM EST     3.23 knots Max Flood
Fri -- 01:22 PM EST     Moonrise
Fri -- 04:02 PM EST     -0.03 knots Slack
Fri -- 04:21 PM EST     Sunset
Fri -- 06:55 PM EST     -3.80 knots Max Ebb
Fri -- 10:05 PM EST     0.17 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.63.53.12.4-0.6-2.7-3.5-3.6-3.1-21.32.63.23.22.92.30.5-2.6-3.5-3.8-3.5-2.6-0.82.4

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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Wind Forecast for Boston, MA (14,3,4,5)
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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.