Monday, March27, 2017 L-36.com


Marine Weather and Tides
Barnstable Town, MA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:29AMSunset 7:03PM Monday March 27, 2017 6:32 PM EDT (22:32 UTC) Moonrise 6:27AMMoonset 6:39PM Illumination 0% Phase: New Moon; Moon at 0 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- 405 Pm Edt Mon Mar 27 2017
Tonight..SW winds 5 to 10 kt...becoming nw after midnight. Seas 2 to 3 ft. Areas of fog. A chance of showers this evening. Areas of drizzle after midnight. Vsby 1 nm or less.
Tue..E winds around 5 kt. Seas 1 foot or less. Areas of fog. A chance of showers with areas of drizzle. Vsby 1 nm or less.
Tue night..E winds around 5 kt...becoming ne after midnight. Seas around 2 ft. Showers likely. Vsby 1 to 3 nm.
Wed..N winds 5 to 10 kt...increasing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 3 ft.
Wed night..N winds 10 to 15 kt...increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft.
Thu..N winds 15 to 20 kt...diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft.
Thu night..N winds 5 to 10 kt. Seas around 2 ft.
Fri..NE winds 5 to 10 kt. Seas 1 foot or less. A chance of rain.
Fri night..SE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Rain likely.
Sat..E winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Rain likely.
Sat night..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of rain. 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 405 Pm Edt Mon Mar 27 2017
Synopsis for massachusetts and rhode island coastal waters.. A warm front will remain south of the coastal through Tuesday as another low tracks across southern new england tonight. Strong high pressure over quebec builds S into new england Wednesday into Thursday. More unsettled weather is in the forecast for late Friday into Saturday followed by high pressure Sunday 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 Barnstable Town, MA
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location: 41.63, -70.31     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 271848
afdbox
area forecast discussion
national weather service taunton ma
248 pm edt Mon mar 27 2017

Synopsis
Damp weather continues Tue and Tue night as low pressure tracks
over or near the region. Although Tue should be milder than
Monday. High pressure brings dry but chilly weather Wed and thu.

More unsettled weather is expected late Fri into sat. High
pressure builds in Sunday into early next week.

Near term /through tonight/
3 pm update...

back end of the rain is approaching the coast - reaching the
boston metro by 4 pm. Last of the rain clears the CAPE by 00z.

Hrrr continues to appear overdone with shower develop late this
evening. There is a small feature seen in the GOES 16 water
vapor channels over the ny city metro, but with only one shower seen
on radar near khpn. Thus, will keep pops low for the passing
shower possibility.

One unknown is the extent of dense fog overnight. WFO box will
look into this more this evening, but with calm winds and plenty
of moisture, fog does appear likely.

Lows above freezing all locations in the mid to upper 30s.

Short term /Tuesday through Tuesday night/
Tuesday... Over-running with light rain or drizzle. Temps near
50 for highs. Warm front south of long island with plenty of
mixture keeps it cloudy and damp. Pops of likely to
categorical, but the key here is for light rain which I was able
to get into the grids.

Not a lot of sunshine anticipated, despite southern new england
getting into the warm sector of a low pressure in southeast
canada. MAX temperatures should be above normal, in the upper
40s and 50s. Could be warmer if clouds and rainfall are delayed
until late in the day. Low risk of a isolated thunderstorm or
two toward the south coast due to elevated instability.

Long term /Wednesday through Monday/
No significant changes at this time.

Highlights...

* showers linger Tuesday night as cold front passes through
* cooler but dry weather for Wed and thurs
* unsettled weather returns Friday into Saturday
pattern overview...

12z model consensus continues to show an active weather pattern
for the period. Split flow aloft will continue through the
period with a few shortwaves moving through the flow. Partial
phasing of the two streams will occur across the great lakes and
northeast on Tuesday. This will result in the development of a
low pressure system east of the region late Tuesday into
Wednesday. High pressure and upper level ridge will follow
Thursday into early Friday. The next upper level low/trough
deamplifies as it moves into the mid/upper ridge axis across the
eastern u.S. A coastal low is forecast to develop and quickly
move east in the aforementioned region of this phasing. The
spread has decreased for this timeframe but the still question
in strengthen and location of this system will determine p-types
and QPF amounts.

Details...

Tuesday night... High confidence.

Weak shortwave will move over the region on Tuesday with surface
low pressure over northern new england. Along the cold front,
guidance develops a secondary low pressure system just south of
southern new england by Tuesday night. This wave of low pressure
will bring showery weather Tuesday evening into the overnight
hours. Cannot rule out some isolated thunder with this system as
tt increase above 50 and li's drop below 0. This is strongest
in the conservative ec.

Precip chance will quickly come to an end from west to east
during the overnight hours as CAA takes a hold of the region.

Wednesday into Friday... High confidence.

Trough overhead as upper level low deepens as it moves towards
the canadian maritimes. This puts the region in northwest flow
through the period resulting in dry but breezy conditions.

Clouds may be stubborn on Wed over the CAPE and islands given
northerly flow across the waters. In fact could have some ocean
effect rain/snow showers over the outer cape! Despite cold
advection, the environment should be well mixed, so max
temperatures will be close to normal.

Northwest flow continues on Thursday with an area of high
pressure building in new england. Anticipate increasing
sunshine and lighter winds. Dry and seasonable conditions should
persist through Friday with high pressure in control.

Friday night into the weekend... Low confidence.

Split flow remains over the region with the next southern stream
wave interacting with the northern stream. Still some model
spread in this system leading to a low confidence forecast. The
ec has become more progressive with this approaching coastal low
developing it over 1-95 while the GFS keeps the system
suppressed. The UKMET is more in between the two systems, but
the GEFS and eps continue to show the system south of sne.

Overall a chilly rain with potential for wet snow/sleet at times
on the northern portion of the precip shield. All guidance
suggest system should be or moving offshore by Sunday, thus
drying trend possible second half of the weekend.

Aviation /19z Monday through Saturday/
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term /through Tuesday night/... High confidence.

This afternoon... Rain ending. Ifr CIGS with light winds.

Tonight... Ifr CIGS remain. Fog develops overnight. Light winds.

Tuesday... MVFR conditions likely in areas of rain and fog, with
a trend lowering to ifr as frontal boundary and surface low
approach.

Kbos taf... Ifr.

Kbdl taf... Ifr.

Outlook /Wednesday through Saturday/...

Wednesday into Thursday... High confidence. Gusty n/w winds
Wednesday withVFR conditions into Thursday.

Friday... Moderate confidence. VFR and dry to start but likely
lowering to MVFR or possibly ifr Fri night in rain/wintry precip.

Saturday... Moderate confidence. MVFR or possibly lower in rain/wintry mix.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term /through Tuesday night/... Moderate confidence.

Rough seas across the eastern outer coastal waters are more
likely than the southern outer waters. Continued the small craft
advisories for those waters. A few gusts to 25 kt are also
possible this evening.

Tonight... A weak frontal boundary sweeps the waters, with light
west winds developing. This will allow seas to subside and small
craft advisories to conclude.

Tuesday... Light south winds with frontal boundary north of the
region. Vsby reduced at times in rain and fog.

Outlook /Wednesday through Saturday/...

Tuesday night... Moderate confidence. Winds becoming northeast late
tue night as front slips south and wave of low pres tracks along the
front south of new england. Vsby reduced at times in rain and fog.

Wednesday into Thursday... High confidence. Gusty north winds near
Wednesday into early Thu then diminishing as high pressure builds
into the area later thu.

Friday... High confidence. Quiet weather with high pressure over the
area early fri. However increasing east-southeast winds Fri night as
low pres approaches from the west. Also vsby lowering in rain and
fog Fri night.

Box watches/warnings/advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 2 am edt Tuesday for anz250-254.

Small craft advisory until 11 pm edt this evening for anz255-
256.

Synopsis...

near term...

short term...

long term...

aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 12 mi108 min 48°F 48°F
44090 15 mi59 min 37°F1 ft
44020 - NANTUCKET SOUND 15 mi43 min 39°F2 ft1015.5 hPa (-1.6)
BZBM3 - 8447930 - Woods Hole, MA 20 mi45 min 44°F 37°F1015 hPa
NTKM3 - 8449130 - Nantucket Island, MA 26 mi45 min SSW 6 G 9.9 48°F 40°F1015.6 hPa
BUZM3 - Buzzards Bay, MA 42 mi33 min SSW 12 G 12 43°F 1015.3 hPa (-1.4)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi45 min WNW 1.9 G 1.9 44°F 1015.6 hPa
FRXM3 46 mi51 min 46°F 45°F
FRVM3 - 8447386 - Fall River, MA 46 mi45 min 1015.5 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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Last
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E12
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G15
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G12
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1 day
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N8
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NE3
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NE13
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SW8
G16
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G19
SW11
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G14
SW9
G17
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G15
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G18
SW6
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G12
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NW6
N10
G13
NE5
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G13
N7
G11
N14
G20
NE8
E3

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hyannis, Barnstable Municipal-Boardman Airport, MA4 mi37 minSSW 51.00 miFog/Mist45°F45°F100%1014.7 hPa
Otis Air National Guard Base, MA11 mi38 minno data1.50 miFog/Mist48°F48°F100%1015.6 hPa
Chatham, Chatham Municipal Airport, MA18 mi41 minSW 40.25 miFog45°F45°F100%1016 hPa
Vineyard Haven, Marthas Vineyard Airport, MA22 mi40 minSW 75.00 miFog/Mist46°F44°F93%1015.3 hPa

Wind History from HYA (wind in knots)
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Last 24hrE5E6E6E746E6E4E5E5E8E7E9
G15
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G17
SE9
G16
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6SE8
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1 day agoN8
G14
N6N3N3N4CalmN5N4NE5N3CalmN3NE4NE6E9NE12
G17
E11E10E8E9SE9
G15
E8E7E6
2 days agoSW14
G24
SW19SW21
G27
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G28
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W6SW12W8W6W7W5CalmN5NE7N9N8NE8NE11NE10N11N9N7N8

Tide / Current Tables for Hyannis Port, Nantucket Sound, Massachusetts
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Hyannis Port
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Mon -- 12:11 AM EDT     3.30 feet High Tide
Mon -- 05:53 AM EDT     -0.28 feet Low Tide
Mon -- 06:27 AM EDT     Moonrise
Mon -- 06:32 AM EDT     Sunrise
Mon -- 12:29 PM EDT     3.49 feet High Tide
Mon -- 06:18 PM EDT     -0.42 feet Low Tide
Mon -- 06:39 PM EDT     Moonset
Mon -- 07:01 PM EDT     Sunset
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.33.22.61.70.7-0-0.30.10.81.52.333.43.42.92.11.10.1-0.4-0.30.41.222.7

Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
Click for Map
Mon -- 12:07 AM EDT     -1.96 knots Max Ebb
Mon -- 03:15 AM EDT     0.00 knots Slack
Mon -- 06:26 AM EDT     Moonrise
Mon -- 06:31 AM EDT     Sunrise
Mon -- 06:33 AM EDT     2.14 knots Max Flood
Mon -- 09:40 AM EDT     -0.00 knots Slack
Mon -- 12:23 PM EDT     -2.06 knots Max Ebb
Mon -- 03:31 PM EDT     0.00 knots Slack
Mon -- 06:37 PM EDT     Moonset
Mon -- 06:52 PM EDT     2.32 knots Max Flood
Mon -- 07:00 PM EDT     Sunset
Mon -- 10:06 PM EDT     -0.00 knots Slack
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2-1.8-1.2-0.30.81.62.12.11.70.8-0.4-1.5-2-2-1.4-0.60.51.52.22.321.30.1-1.1

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 (18,4,5,8)
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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.