Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Plymouth, MA

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Sunrise 5:05AMSunset 8:24PM Thursday June 20, 2019 9:14 AM EDT (13:14 UTC) Moonrise 11:03PMMoonset 8:00AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 858 Am Edt Thu Jun 20 2019
This afternoon..SE winds 5 to 10 kt. Seas 1 foot or less. Areas of fog. Showers likely early, then a chance of showers with isolated tstms. Some tstms may produce heavy rainfall. Vsby 1 nm or less, increasing to 1 to 3 nm.
Tonight..S winds 5 to 10 kt. Seas 1 foot or less. Areas of fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Fri..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Patchy fog. Showers likely with a chance of tstms. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Fri night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers.
Sat..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Sat night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sun..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Sun night..W winds 5 to 10 kt. Seas around 2 ft.
Mon..SW winds 5 to 10 kt. Seas 1 foot or less.
Mon night..S winds 5 to 10 kt. Seas 1 foot or less. 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 858 Am Edt Thu Jun 20 2019
Synopsis for massachusetts and rhode island coastal waters.. Low pres will approach southern new england today and will cross the region tonight, exiting the coast Fri morning. High pres will build into the northeast from the great lakes over the weekend, then will move offshore Mon. 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 Plymouth, MA
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location: 42, -70.54     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 201305
afdbox
area forecast discussion
national weather service boston norton ma
905 am edt Thu jun 20 2019

Synopsis
A humid airmass will bring scattered showers and a few
embedded thunderstorms with locally heavy rainfall today. Low
pressure crossing southern new england tonight will bring more
widespread showers and thunderstorms, some with heavy rain. The
low will move offshore Friday morning followed by drier air in
the afternoon, although a brief shower or thunderstorm is still
possible. Dry and seasonable weather returns for the weekend.

Warmer weather arrives early next week with a few
showers thunderstorms possible at times, but the majority of the
time will feature dry weather.

Near term until 6 pm this evening
900 am update...

remnants of the shower t-storm cluster that went thru nj E pa
very early this morning, diminished in intensity and coverage
and were tracking thru sne at 9 am. Much of the organized
convection this morning was focused over ny state and was
heading NE towards northern new england, which continues to be
supported by the cams. This convection will be closer to
frontal boundary where better dynamics and moisture convergence
are located. While the most focused convection should stay to
our north west, the airmass over us is saturated with pwats
around 2", so showers are expected to continue to develop and
cross thru southern new england thru late this morning and over
the course of the day. Continue to have likely to categorical
pops for the day as a whole.

Then another round of showers storms is expected closer to our
area this afternoon, especially near the berkshires where models
show some limited instability (assuming we can destabilize
behind this morning's showers). Hrrr shows this nicely with a
line of convection in eastern ny 19-20z which could reach
western ma a couple of hours later. That there is even a low
risk for strong or perhaps severe storms near the berkshires,
where there are decent probabilities in the sig tor (sref) and
max updraft helicity (href) progs, although higher probabilities
are focused farther sw.

Farther east, S SE flow will keep things more stable but still
showery, with low clouds and areas of fog for most of the day.

Visibility below 1 mile is possible along the south coast, cape
and islands.

Highs should top out in 70s, warmest in hartford springfield
area while along immediate coastline, temperatures may hold in
60s.

Short term 6 pm this evening through 6 pm Friday
Showers will become more widespread later tonight as low pressure
crosses sne. Also have potential for thunder with models showing
some mucape. Good setup for locally heavy rain with pwats over 2",
support from both upper and lower level jets, and larger scale lift
from approaching short wave. Forecast soundings show deep moist
profile with warm cloud depth of more than 12kft. Models, including
cams, are in good agreement that focus for heavier rainfall should
be near berkshires, but there is also possibility that we see a
second axis somewhere near hartford-boston corridor.

Rainfall through tonight should average from as little as 0.25 to
0.50" on CAPE cod and the islands, to 0.50 to 1.00" elsewhere, with
as much as 1.50" in western ma.

Since there is a lot of uncertainty as to where this will occur, we
do not have enough confidence to issue flash flood watches at this
time. Certainly there is the potential for the usual minor urban and
poor drainage flooding. The lowest flash flood guidance values,
around 2" hour, are located in western ma.

Interesting setup for Friday. Pattern looks more like something we
see in the cool season as opposed to late june, as models try
to close off 700 mb low which results in banding signature as
surface low heads offshore. With such an anomalously moist
airmass in place, there is once again the potential for a band
of heavy rain Friday morning, most likely in eastern ma. This
could be accompanied by brief drop in temperature, possibly into
50s before readings recover later in the morning.

Brief burst of 20-30 mph gusts possible as low heads offshore.

Drying works into region Friday afternoon but enough moisture may
linger along with weak surface convergence to help a shower or storm
pop up in the afternoon, again mainly in eastern ma. Highs recover
into 70s.

Long term Friday night through Wednesday
Highlights...

* dry seasonable this weekend with the warmer temps on sun
* summer-like temps early next week with the risk for a few
showers t-storms, but the majority of the time it will be dry
details...

Friday night...

drier air continues to work in behind the departing low pressure
system cold front. Low temperatures by daybreak Saturday should be
mainly in the middle 50s to the lower 60s.

Saturday and Sunday...

anomalous closed low over the canadian maritimes will result in
mainly a dry beautiful weekend across southern new england. Its
associated cold pool aloft with 500t near -20c may result in the low
risk for a spot shower or two sat. However, given dewpoints dropping
into the 40s that would probably be the worst case scenario and not
worth inserting into the forecast at this point. Highs mainly in the
75 to 80 degree range on Sat and it will be quite breezy. Bufkit
supporting west to northwest wind gusts of 25 to 35 mph by afternoon
with a very well mixed atmosphere.

The closed upper low lifts further north across the canadian
maritimes sun. This will allow for rising height fields and warmer
temperatures on sun. Highs will mainly be between 80 and 85 but
with with less wind then Sat along with continued comfortable
humidity levels.

Monday through Wednesday...

closed low across the canadian maritimes weakens allowing for rising
height fields into southern new england. This should support highs
well up into the 80s for much of the first part of next week away
from any localized marine influences . There is the potential for
highs to approach 90 with perhaps the best chance for that on tue,
but confidence not enough to forecast those readings. That would
depend upon whether we avoid any subtle backdoor cold fronts and we
see enough sunshine, which is quite uncertain this far out.

While it does look like the vast majority of the time will feature
dry weather, a few showers t-storms will be possible. The main time
frame of concern would be Tue into Wed when an approaching shortwave
trough frontal boundary may provide a focus for a few showers t-
storms.

Aviation 13z Thursday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... Moderate confidence.

Mainly ifr lifr conditions expected to continue through tonight
in rounds of showers and a few embedded t-storms. Some brief
improvements to MVFR conditions are possible outside the
showers, but expect ifr lifr conditions to dominate into tonight.

Conditions gradually improve toVFR from W to E Friday,
although a pop-up shower or thunderstorm could develop Friday
afternoon.

Kbos terminal... Moderate confidence in taf.

Kbdl terminal... Moderate confidence in taf.

Outlook Friday night through Monday ... Moderate confidence.

Friday night through Sunday night:VFR. Breezy.

Monday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

Light S SE winds and flat seas today along with scattered showers at
times. Seas on outer waters south and east of CAPE cod build today
and should reach 5-6 ft tonight and Friday, so small craft
advisories have been posted. Showers and scattered thunderstorms
expected tonight along with areas of fog.

Low pressure exits eastern ma coast Friday morning. May have brief
burst of 20-25kt gusts during morning, especially on waters north
and east of CAPE cod, before winds subside by early afternoon.

Outlook Friday night through Monday ... Moderate confidence.

Friday night: winds less than 25 kt. Local rough seas. Slight
chance of rain showers.

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

Sunday: low risk for small craft advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft.

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

Monday: winds less than 25 kt.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 9 pm this evening to 6 pm edt Friday
for anz254>256.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 16 mi44 min 61°F
44013 - BOSTON 16 NM East of Boston, MA 25 mi84 min E 5.8 G 5.8 59°F 58°F1 ft1006.1 hPa (-0.4)59°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 25 mi84 min ESE 9.7 G 12 57°F 2 ft1006.9 hPa (-0.8)57°F
WAXM3 - Waquoit Bay Reserve, MA 29 mi89 min SW 2.9 63°F 1007 hPa63°F
BZBM3 - 8447930 - Woods Hole, MA 34 mi56 min 62°F 63°F1006.4 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 36 mi70 min SE 7.8 G 9.7 58°F 57°F2 ft1006.6 hPa
BHBM3 - 8443970 - Boston, MA 37 mi62 min 61°F 1006.4 hPa
44020 - NANTUCKET SOUND 38 mi44 min 9.7 G 9.7 64°F1006.8 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi56 min Calm G 0 65°F 1006.2 hPa
FRVM3 - 8447386 - Fall River, MA 39 mi62 min 65°F 70°F1006.6 hPa
FRXM3 40 mi62 min 64°F 63°F
CPTR1 - 8452944 - Conimicut Light, RI 47 mi56 min SE 2.9 G 2.9 63°F 67°F1006.3 hPa
FOXR1 - 8454000 - Providence, RI 48 mi56 min S 1.9 G 2.9 64°F 65°F1005.6 hPa
NAXR1 - Narragansett Bay Reserve, RI 49 mi89 min Calm 63°F 1007 hPa62°F
PRUR1 49 mi56 min 63°F 63°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 49 mi56 min ESE 1.9 G 2.9 63°F 1006.7 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA10 mi79 minESE 49.00 miOvercast63°F62°F100%1006.8 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi82 minE 410.00 miOvercast63°F61°F93%1006.5 hPa
Provincetown Municipal Airport, MA18 mi78 minSE 410.00 miOvercast61°F61°F100%1007.1 hPa
Otis Air National Guard Base, MA24 mi79 minSE 54.00 miFog/Mist63°F62°F100%1006.8 hPa

Wind History from GHG (wind in knots)
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Last 24hrCalmNE3NE5E4E4E7SE6
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1 day agoCalmSE4S6SE6SE4SE4SE44S44SE3SE4CalmCalmS3CalmCalmCalmCalmCalm3Calm3Calm
2 days ago46
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Tide / Current Tables for Gurnet Point, Massachusetts
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Gurnet Point
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Thu -- 01:48 AM EDT     10.16 feet High Tide
Thu -- 05:06 AM EDT     Sunrise
Thu -- 08:00 AM EDT     Moonset
Thu -- 08:17 AM EDT     -0.11 feet Low Tide
Thu -- 02:28 PM EDT     8.88 feet High Tide
Thu -- 08:21 PM EDT     Sunset
Thu -- 08:25 PM EDT     1.11 feet Low Tide
Thu -- 11:02 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.29.710.19.47.85.63.31.1-00.21.53.45.67.68.78.77.86.24.32.51.21.32.64.4

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
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Thu -- 02:59 AM EDT     -4.59 knots Max Ebb
Thu -- 05:07 AM EDT     Sunrise
Thu -- 06:11 AM EDT     0.01 knots Slack
Thu -- 08:01 AM EDT     Moonset
Thu -- 09:19 AM EDT     4.30 knots Max Flood
Thu -- 12:48 PM EDT     -0.20 knots Slack
Thu -- 03:27 PM EDT     -4.15 knots Max Ebb
Thu -- 06:30 PM EDT     0.02 knots Slack
Thu -- 08:20 PM EDT     Sunset
Thu -- 09:26 PM EDT     3.89 knots Max Flood
Thu -- 11:02 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-3.1-4.3-4.6-4.3-3.3-1.42.73.94.34.23.72.7-1.4-3.3-4.1-4.1-3.4-2.123.33.83.83.4

Weather Map and Satellite Images
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Wind Forecast for Boston, MA (9,2,3,4)
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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.