Friday, May24, 2019 L-36.com


Marine Weather and Tides
Mashpee Neck, 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 5:12AMSunset 8:03PM Friday May 24, 2019 8:50 PM EDT (00:50 UTC) Moonrise 12:26AMMoonset 10:13AM Illumination 66% Phase: Waning Gibbous; Moon at 21 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- 830 Pm Edt Fri May 24 2019
.gale warning in effect until 10 pm edt this evening...
Tonight..N winds 20 to 25 kt with gusts up to 45 kt, diminishing to 5 to 10 kt with gusts up to 20 kt after midnight. Seas around 4 ft, subsiding to 2 ft after midnight.
Sat..NW winds 5 to 10 kt, becoming sw in the afternoon. Seas around 2 ft.
Sat night..SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 25 kt after midnight. Seas around 3 ft. Showers after midnight with vsby 1 to 3 nm.
Sun..SW winds 10 to 15 kt. Gusts up to 25 kt in the morning. Seas around 3 ft. A chance of showers and tstms in the morning with vsby 1 to 3 nm.
Sun night..W winds 5 to 10 kt, becoming nw after midnight. Seas around 2 ft.
Mon..NE winds 5 to 10 kt. Seas around 2 ft.
Mon night..SE winds around 5 kt. Seas around 2 ft.
Tue..SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas around 2 ft. A chance of showers.
Tue night..S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
Wed..SW winds around 10 kt. Seas around 3 ft. A chance of showers and tstms.
Wed night..S winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas around 4 ft. A chance of showers and tstms. 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 830 Pm Edt Fri May 24 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres builds across new england tonight, then across the waters Sat. Another cold front moves across the waters Sat night, with another weak system moving across late Sunday. High pres builds across on Mon, with another system approaching Tue. 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 Mashpee Neck, MA
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location: 41.61, -70.44     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 242331
afdbox
area forecast discussion
national weather service boston norton ma
731 pm edt Fri may 24 2019

Synopsis
Strong winds diminish early this evening, but will persist a bit
longer on the islands until high pressure builds in from the
west. Dry and nice weather is on tap for Saturday afternoon, but
a fast moving disturbance will bring a period of showers and
perhaps a few embedded thunderstorms mainly overnight Saturday.

Aside from a possible isolated thunderstorm Sunday, the rest of
the holiday weekend looks warm and dry, showers and cooler
temperatures return Tuesday ahead of a warm front approaching
from the south. Scattered showers and storms are expected
Thursday as a cold front crosses the region.

Near term until 6 am Saturday morning
730 pm update...

forecast is on track. Have cancelled the wind advisory for
plymouth and barnstable counties but it remains posted for dukes
and nantucket counties. Winds have diminished to gusts to 30-35
mph in plymouth county and on CAPE cod, but still gusting to
about 40 knots... Or 46 mph... On nantucket and about 40 mph on
the vineyard. Overall, winds will be diminishing very quickly
after sunset, per bufkit, although hanging on to gusts to 20-25
mph along the coast until closer to 11 pm. No changes to
temperatures or sky cover forecast at this time. Skies are
expected to clear before midnight. Will have to watch for clouds
lingering a little longer near the coast.

Previous discussion...

amplifying shortwave energy east of the canadian maritimes has
resulted in a wind shift to the nne along the eastern ma coast.

This has brought in a much cooler marine airmass as temperatures
have dropped into the middle 50s to the lower 60s. Elsewhere,
temperature were still mainly in the 70 to 75 degree range.

It was still quite windy across the entire region, but we should see
wind gusts diminish inland over the next several hours as
temperatures cool and mixing diminishes. However, the process will
be a bit slower across the CAPE islands. Therefore, the wind
advisory will remain in effect for the CAPE islands as well as
coastal plymouth county into the first half of the evening. This a
result of a northerly 925 mb jet of 40 to 50 knots and decent
pressure rises. Even in these locations though expect winds to
diminish by mid to late evening as the core of the low level jet
shifts southeast of the region.

Otherwise, winds will decouple overnight in many locations as high
pressure builds in from the west. Low temperatures by daybreak
should drop into the 40s to around 50.

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

high pressure sinks south of the region on Saturday, but still will
be in control of our weather for most of the day. Plenty of
sunshine and a dry airmass in place should allow for afternoon highs
to reach well into the 70s in most locales along with much less wind
then today. Sea breezes along the coast will hold highs mainly in
the middle to upper 60s on most beaches. We should see an increase
in mid high level cloudiness during the afternoon from west to east
ahead of an approaching shortwave. Dry weather should prevail, but
can not rule out a few showers developing toward evening in
northwest ma.

Saturday night...

approaching shortwave energy will induce a modest southwest llj
along with a burst of elevated instability. This should result in a
period of showers along with the potential for a few embedded
thunderstorms with some marginal elevated instability. Appears the
greatest risk for a period of showers will be late Saturday night
and into the overnight hours. Low temperatures should mainly be in
the 50s.

Long term Sunday through Friday
Updated 345 pm Friday.

Highlights...

* warm and mainly dry Sun and memorial day.

* cooler with showers likely tue.

* warmer later next week with scattered showers storms thu.

Sne should remain on the northern periphery of subtropical ridge
into next week as series of northern stream short waves move through
region bringing rounds of showers storms every few days.

What looked to be a significant warmup by the middle of next week
now appears to be on hold as surface boundary remains south of
region and GEFS eps probabilities confine more significant heat and
humidity well to our south. Still looks seasonable for late may by
end of next week however.

Sunday...

short wave moves offshore in morning which will take any lingering
showers and cloudiness with it. Sunshine will help temps reach low
to mid 80s inland which will result in decent instability Sunday
afternoon ahead of weak cold front. Depending on your model of choice,
capes increase to 500-1500 j kg, mid level lapse rates reach
6-7c km, and 0-6km shear is strong at 40-50kt. However a
significant limiting factor is drying aloft which should prevent
widespread storm development. Our thinking is we may see a few
storms develop which could produce strong wind gusts.

Monday...

front moves offshore with high pressure building north of region,
resulting in plenty of sunshine along with cooler temperatures and
low humidity. Expect highs to stay in 60s along immediate coast
where gradient should weaken enough to allow for coastal sea
breezes. Inland highs will reach 70s to near 80.

Tuesday through Thursday...

cooler wet day Tuesday as warm front approaches and probably stays
sw of region with decent onshore flow in place. Keeping highs in 60s
per model consensus but it's certainly possible for coastal
locations to hold in 50s. Although confidence decreases beyond
Tuesday due to timing issues with short waves, pattern favors warm
sector conditions Wednesday and Thursday, although cloudiness should
keep highs in 70s Wednesday and in 80s Thursday as main core of
heat humidity remains well south of region. Cold front should bring
at least scattered showers storms Thursday.

Aviation 00z Saturday 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 ...

2330z update...

tonight... High confidence inVFR conditions. Northerly wind gusts
of 25 to 35 knots diminish early this evening, although will persist
a bit longer across the islands where some 40 knot gusts are
anticipated. These winds should diminish as well though as high
pressure builds in from the west by mid to late evening.

Saturday... High confidence inVFR conditions. South to southwest
winds of 5 to 15 knots with sea breezes developing by afternoon
along portions of the coast, especially across eastern ma.

Saturday night... Moderate confidence. VFR conditions should
deteriorate to MVFR thresholds from west to east with even some
brief localized ifr conditions. This a result of a period of
showers with perhaps an isolated thunderstorm or two mainly during
the late evening and overnight hours.

Kbos terminal... High confidence in taf. Ese sea breeze should
develop by lunch time on Saturday.

Kbdl terminal... High confidence in taf.

Outlook...

Sunday: mainlyVFR, with local MVFR possible. Breezy. Slight
chance shra, slight chance tsra.

Sunday night through memorial day:VFR.

Monday night:VFR. Chance shra.

Tuesday: mainlyVFR, with local MVFR possible. Chance shra.

Wednesday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ...

730 pm update...

tonight... Moderate to high confidence. Gale warnings remain
posted into the first part of the evening for northerly wind
gusts of 30 to 40 knots, but brief 45 to 50 knot gusts across
our far southeast waters where storm warnings remain in effect
for a couple more hours. Wind gusts should diminish later this
evening and overnight as high pressure builds in from the west.

Saturday... High confidence. High pressure sinks to our south but
will keep winds seas below small craft advisory thresholds.

Saturday night... Moderate to high confidence. Modest southwest llj
developing should result in some 20 to 25 knot wind gusts and 3 to 5
foot seas developing. Some small craft headlines might be needed.

Outlook...

Sunday: winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers, slight chance of thunderstorms.

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

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

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

Tuesday: winds less than 25 kt. Chance of rain showers.

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

Box watches warnings advisories
Ct... None.

Ma... Wind advisory until 9 pm edt this evening for maz023-024.

Ri... None.

Marine... Storm warning until 8 pm edt this evening for anz232-254-255.

Gale warning until 10 pm edt this evening for anz231-233>235-
250-251-256.

Gale warning until 9 pm edt this evening for anz230-236-237.

Synopsis... Frank jwd gaf
near term... Frank gaf
short term... Frank
long term... Jwd
aviation... Frank jwd gaf
marine... Frank jwd gaf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 5 mi65 min WNW 5.1 56°F 1016 hPa48°F
44020 - NANTUCKET SOUND 12 mi40 min NNE 23 G 31 55°F1016.4 hPa
BZBM3 - 8447930 - Woods Hole, MA 14 mi32 min 55°F 57°F1016.8 hPa
44090 17 mi20 min 53°F5 ft
NTKM3 - 8449130 - Nantucket Island, MA 29 mi32 min NNE 13 G 24 53°F 59°F1016.6 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi32 min NE 14 G 17 59°F 1017.4 hPa
FRVM3 - 8447386 - Fall River, MA 39 mi32 min 59°F 60°F1017.9 hPa
FRXM3 40 mi38 min 59°F 48°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 44 mi60 min NNE 19 G 21 51°F 5 ft1017.2 hPa (+4.8)45°F
PRUR1 46 mi32 min 59°F 49°F
NAXR1 - Narragansett Bay Reserve, RI 48 mi65 min ENE 15 60°F 1017 hPa50°F
NWPR1 - 8452660 - Newport, RI 48 mi38 min NNE 12 G 18 59°F 54°F1017.4 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi32 min ENE 12 G 14 59°F 1017.7 hPa
CPTR1 - 8452944 - Conimicut Light, RI 49 mi32 min NNE 11 G 14 59°F 60°F1017.7 hPa

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA6 mi55 minNE 18 G 2510.00 miFair and Breezy54°F46°F77%1016.6 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA10 mi54 minNNE 17 G 2710.00 miOvercast55°F46°F72%1016.2 hPa
Marthas Vineyard Airport, MA17 mi57 minNNE 17 G 2610.00 miFair56°F45°F67%1016 hPa

Wind History from FMH (wind in knots)
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1 day agoSW6W6CalmCalmSW4W4SW4CalmSW3S5SW5S10SW10
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2 days agoNW10
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Tide / Current Tables for Cotuit Highlands, Nantucket Sound, Massachusetts
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Cotuit Highlands
Click for Map
Fri -- 12:25 AM EDT     Moonrise
Fri -- 04:59 AM EDT     2.59 feet High Tide
Fri -- 05:14 AM EDT     Sunrise
Fri -- 10:13 AM EDT     Moonset
Fri -- 10:54 AM EDT     0.14 feet Low Tide
Fri -- 05:43 PM EDT     2.30 feet High Tide
Fri -- 08:02 PM EDT     Sunset
Fri -- 11:07 PM EDT     0.46 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.21.62.12.52.62.421.40.80.30.10.30.611.51.92.22.32.11.71.20.70.5

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Fri -- 12:26 AM EDT     Moonrise
Fri -- 01:54 AM EDT     -0.02 knots Slack
Fri -- 04:55 AM EDT     -4.28 knots Max Ebb
Fri -- 05:15 AM EDT     Sunrise
Fri -- 08:05 AM EDT     0.01 knots Slack
Fri -- 10:13 AM EDT     Moonset
Fri -- 11:11 AM EDT     3.99 knots Max Flood
Fri -- 02:49 PM EDT     -0.04 knots Slack
Fri -- 05:28 PM EDT     -3.86 knots Max Ebb
Fri -- 08:03 PM EDT     Sunset
Fri -- 08:31 PM EDT     0.17 knots Slack
Fri -- 11:24 PM EDT     3.52 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.32.5-0.9-3-4-4.3-3.9-3-0.92.73.643.93.42.5-1.2-3.1-3.8-3.8-3.2-1.91.833.5

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 (20,4,5,8)
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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.