Sunday, August19, 2018 L-36.com


Marine Weather and Tides
Boston, MA

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Sunrise 5:55AMSunset 7:40PM Sunday August 19, 2018 2:05 AM EDT (06:05 UTC) Moonrise 2:53PMMoonset 12:09AM Illumination 53% Phase: First Quarter Moon; Moon at 8 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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ANZ230 Boston Harbor- 116 Am Edt Sun Aug 19 2018
.small craft advisory in effect until 4 am edt early this morning...
Rest of tonight..NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft.
Sun..NE winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 ft.
Sun night..NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 to 3 ft.
Mon..NE winds 5 to 10 kt. Waves 2 to 3 ft.
Mon night..NE winds around 5 kt. Waves 1 foot or less.
Tue..E winds around 5 kt. Waves 1 foot or less.
Tue night..SE winds around 5 kt. Waves 1 foot or less. A chance of showers.
Wed..S winds 5 to 10 kt. Waves around 2 ft. Showers and tstms likely.
Wed night..W winds around 5 kt. Waves 1 foot or less.
Thu..NW winds around 5 kt. Waves 1 foot or less.
Thu night..NW winds around 5 kt. Waves 1 foot or less. Winds and waves 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 116 Am Edt Sun Aug 19 2018
Synopsis for massachusetts and rhode island coastal waters.. A cold front will sweep across the waters overnight then will stall across the southern waters through Mon, with weak waves of low pres moving along it. The low pres waves will cause ne winds up to 25 kt at times especially across the southern waters. Meanwhile, high pres will build N of the waters through Tue. Low pres with its attendant fronts will approach from the west on Wed then head offshore Wed night. Dry high pres will build in from the W on Thu. 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 Boston, MA
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location: 42.36, -71.02     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 190319
afdbox
area forecast discussion
national weather service boston norton ma
1119 pm edt Sat aug 18 2018

Synopsis
Weak waves of low pressure will develop along a cold front as
it moves off the south coast overnight. This may bring a few
showers at times along with and cooler temperatures Sunday into
Monday, especially near the coast. High pressure returns
Tuesday, but another approaching front will more showers and
thunderstorms Tuesday night into Wednesday. Dry and seasonable
weather follows into next weekend as high pressure builds into
the region.

Near term until 6 am Sunday morning
1045 pm update...

pressure surge working down the E coast tonight after the cold
front pushed S this evening, producing gusty NE winds from cape
ann to near plymouth through 02z. Expect the wind gusts to
continue to work southward, reaching the CAPE and S coastal mass
by around 04z or so. Noting gusts up to 28 mph at kbox at 01z,
with the sustained winds up to 15-20 mph, with gusts up to 27 kt
at buoy 44013 and 21 kts (so far) at buoy 44018 (e of kpvc).

Will see these gusts for next few hours, then sustained winds
from around 10 kt up to 15 kt or so along E coastal locations
through most of the night.

Noting patchy showers and drizzle moving onshore across most of
eastern and central mass into N ri and NE ct, which should
continue off and on through the overnight hours with the steady
onshore flow. This will keep low clouds in place and will see
patchy fog develop with low t TD spreads.

Have updated near term forecast to bring conditions current and
carry trends into the overnight.

Previous discussion...

cold front settles south of the south coast, with winds shifting
to northeast. Low clouds along parts of the maine coast will be
drawn across our area, especially over eastern mass, for part
of the night and linger across parts of ri and SE mass through
the night.

Guidance shows multiple shortwaves moving through the flow
overnight, each enough to slow the offshore progress of the
front. This and the moist northeast flow should keep clouds over
much of SRN new england through the night with scattered showers
along the south coast.

The northeast flow will bring a change of airmass with temps and
dew points falling into the 60s.

Short term 6 am Sunday morning through Sunday night
High pressure moves from quebec to the maritimes, but maintains
a northeast flow into our area. Expect cloudy skies along the
south coast and partly cloudy skies in northern mass. The
passing shortwaves will keep a chance of showers along the south
coast.

The cool northeast surface flow should keep MAX temps in the
70s. More noticeable will be the humidity, with dew points in
the 60s... Not as oppressive as today was. The dew points will
lower a little Sunday night, allowing min temps in the upper 50s
to mid 60s.

Long term Monday through Saturday
Highlights...

* few showers near south coast Monday
* more humid with showers storms Tuesday night and Wednesday
* dry Thursday into next weekend with lower humidity
northern stream expected to dominate our weather as series of short
waves moving across southern canada rotate through sne. This pattern
favors near average temperatures for mid august with no prolonged
periods of heat and humidity.

Still looking at scattered showers near south coast Monday as front
remains stalled south of new england and weak wave of low pressure
travels along it, but models ensembles remain in agreement that most
of rainfall will be focused offshore. Does look breezy and cooler
thanks to brisk NE flow.

Next system Tuesday night and Wednesday brings quick return of
tropical air as low pressure tracks through southern canada and
swings a cold front through region. Precipitable water values climb
above 2 inches as dewpoints rise into 70s once again, and with
plenty of lift from mid level short wave and surface cold front,
showers and few thunderstorms are likely. This system is progressive
so we expect activity to be offshore by Wednesday evening.

High pressure builds into sne Thursday through Saturday, with
prolonged period of dry and seasonable weather and lower humidity
than we have experienced over past several weeks. Dewpoints may drop
into 50s which is something we haven't seen in some time.

Aviation 03z Sunday through Thursday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ...

overnight... Moderate confidence.

Winds shift to NE with gusts up to 25 kt across E coastal
terminals through around 06z or so. Leftover showers will tend
to weaken, but patchy drizzle develops. This, along with low
clouds and fog will likely reduce vsbys to ifr-lifr across e
coastal mass to CAPE cod, with a mix of low endVFR to MVFR
cigs vsbys elsewhere.

Sunday and Sunday night... Moderate confidence.

MVFR CIGS linger over ri and SE mass much of the day, then
expand west across ct Sunday night.VFR conditions over the rest
of mass and northern ct during Sunday, withVFR remaining north
of the mass pike Sunday night. NE winds through the day and
night, with strongest gusts along the coast.

Kbos terminal... Moderate confidence in taf. MVFR CIGS andVFR
vsbys should continue through around 08z to 10z. NE winds 10-15
kt with some gusts up to 20 kt. CIGS should improve toVFR by
10z-12z.

Kbdl terminal... High confidence in taf. MVFR to low endVFR
cigs andVFR vsbys linger through around 06z to 08z, then should
be mainlyVFR.

Outlook Monday through Thursday ...

Monday: mainlyVFR, with local MVFR possible. Breezy.

Monday night through Tuesday: mainlyVFR, with local MVFR
possible.

Tuesday night: mainlyVFR, with local ifr possible. Chance
shra.

Wednesday: mainlyVFR, with local ifr possible. Breezy. Chance
shra, chance tsra.

Wednesday night through Thursday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ... High confidence.

Cold front moves S of the south coast overnight then stalls. Ne
winds gusting up to 20-25 kt, along with seas on the outer
waters building to 5 ft overnight. Could see some gusts up to
30 kt on the eastern waters.

Could see NE winds gusting up to 25 kt across most of the open
waters and seas up to 5 ft into Sunday night, so have extended
small craft advisories to most waters (except CAPE cod bay for
now).

A continuing chance of showers overnight through Sunday night,
with the best chance occurring across the southern waters.

Outlook Monday through Thursday ...

Monday through Monday night: winds less than 25 kt. Seas up to
5 ft. Slight chance of rain showers.

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

Tuesday night: winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers, chance of thunderstorms.

Wednesday: winds less than 25 kt. Seas up to 5 ft. Chance of
rain showers, chance of thunderstorms.

Wednesday night: winds less than 25 kt. Local rough seas.

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 6 am to noon edt Sunday for anz232.

Small craft advisory from 6 am to 6 pm edt Sunday for anz233-
234.

Small craft advisory until 4 am edt Sunday for anz230.

Small craft advisory from 5 am to 10 pm edt Sunday for anz235-
237.

Small craft advisory until midnight edt Sunday night for
anz250.

Small craft advisory until 8 pm edt Sunday for anz251.

Small craft advisory until 6 am edt Monday for anz254.

Small craft advisory from 5 am Sunday to 6 am edt Monday for
anz255-256.

Synopsis... Wtb jwd
near term... Evt jwd
short term... Wtb
long term... Jwd
aviation... Wtb evt jwd
marine... Wtb evt jwd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 2 mi41 min 67°F 1012.4 hPa
44013 - BOSTON 16 NM East of Boston, MA 20 mi75 min NE 18 G 19 67°F 69°F4 ft1011.7 hPa (+1.0)65°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi61 min NE 16 G 18 68°F 69°F4 ft1011.1 hPa
FOXR1 - 8454000 - Providence, RI 43 mi41 min E 14 G 19 67°F 76°F1011.7 hPa
PVDR1 44 mi41 min NNE 9.9 G 17 67°F 1012.7 hPa64°F
FRVM3 - 8447386 - Fall River, MA 46 mi41 min 67°F 81°F1012.6 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi35 min NE 15 G 19 69°F 1012.1 hPa
IOSN3 - Isle of Shoals, NH 47 mi65 min NNE 15 G 16 67°F 1012.7 hPa (+0.8)63°F
FRXM3 47 mi35 min 68°F 66°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi35 min NE 15 G 20 67°F 78°F1012.2 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 48 mi75 min NE 19 G 23 66°F 5 ft1011.8 hPa (+0.9)63°F
BGXN3 - Great Bay Reserve, NH 49 mi80 min NNE 1 65°F 65°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA1 mi71 minNNE 1110.00 miOvercast68°F64°F87%1013 hPa
East Milton, MA11 mi69 minENE 10 G 20 mi63°F63°F100%1013.4 hPa
Norwood, Norwood Memorial Airport, MA14 mi72 minNE 44.00 miFog/Mist68°F66°F93%1012.5 hPa
Laurence G Hanscom Field Airport, MA16 mi69 minNNE 510.00 miOvercast67°F63°F87%1014 hPa
Beverly, Beverly Municipal Airport, MA16 mi72 minNNE 410.00 miOvercast67°F64°F93%1012.3 hPa

Wind History from BOS (wind in knots)
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1 day agoN4NE5NE4N6N5N4NE6E8E9E9E9E9E9E8NE9NE7E5S4S9SW9S7SW10SW12SW8
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N8E6E5SE3E3CalmN3NE3

Tide / Current Tables for Charlestown, Charles River, Massachusetts
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Charlestown
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Sun -- 12:09 AM EDT     Moonset
Sun -- 12:12 AM EDT     0.77 feet Low Tide
Sun -- 05:55 AM EDT     Sunrise
Sun -- 06:28 AM EDT     8.92 feet High Tide
Sun -- 12:28 PM EDT     1.32 feet Low Tide
Sun -- 02:52 PM EDT     Moonrise
Sun -- 06:50 PM EDT     9.69 feet High Tide
Sun -- 07:39 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.12.23.85.97.88.88.87.96.54.62.71.51.52.43.95.97.99.39.79.17.863.8

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Sun -- 12:08 AM EDT     Moonset
Sun -- 12:13 AM EDT     0.00 knots Slack
Sun -- 03:36 AM EDT     1.01 knots Max Flood
Sun -- 05:55 AM EDT     Sunrise
Sun -- 06:21 AM EDT     -0.00 knots Slack
Sun -- 10:34 AM EDT     -1.13 knots Max Ebb
Sun -- 12:33 PM EDT     0.00 knots Slack
Sun -- 02:52 PM EDT     Moonrise
Sun -- 04:00 PM EDT     1.03 knots Max Flood
Sun -- 06:44 PM EDT     -0.00 knots Slack
Sun -- 07:38 PM EDT     Sunset
Sun -- 11:02 PM EDT     -1.28 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.50.8110.60.1-0.2-0.5-0.8-1.1-1.1-0.50.30.70.910.80.3-0.1-0.5-0.8-1.1-1.3

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Northeast    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 (2,6,7,8)
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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.