Sunday, August19, 2018 L-36.com


Marine Weather and Tides
East Dennis, MA

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Sunrise 5:52AMSunset 7:35PM Sunday August 19, 2018 10:08 AM EDT (14:08 UTC) Moonrise 2:47PMMoonset 12:07AM Illumination 56% 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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ANZ231 Cape Cod Bay- 716 Am Edt Sun Aug 19 2018
.small craft advisory in effect until 4 pm edt this afternoon...
Today..NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A slight chance of showers.
Tonight..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Mon..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Mon night..NE winds 5 to 10 kt. Seas 2 to 3 ft.
Tue..E winds 5 to 10 kt. Seas 1 foot or less.
Tue night..SE winds 5 to 10 kt. Gusts up to 20 kt after midnight. Seas around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Wed..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers.
Wed night..W winds 10 to 15 kt. Seas 2 to 3 ft.
Thu..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Thu night..W winds around 5 kt. Seas 1 foot or less. 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 716 Am Edt Sun Aug 19 2018
Synopsis for massachusetts and rhode island coastal waters.. A front will remain stalled south of new england through tonight. Weak waves of low pres will move along it, bringing scattered showers and patchy fog, especially across the southern waters. Gusty ne winds up to around 25 kt through tonight. High pres will build across the waters late tonight and Tue. Low pres with its associated fronts will approach on Wed, then push 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 East Dennis, MA
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location: 41.75, -70.16     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 191120
afdbox
area forecast discussion
national weather service boston norton ma
720 am edt Sun aug 19 2018

Synopsis
A stalled front to the south will lead to occasional drizzle and
showers especially across the south coast into Monday. Showers
and storms possible Tuesday night into Wednesday. Dry weather
occurs late week.

Near term until 6 pm this evening
720am update...

although NE flow continues the impact of subsidence behind the
stalled front has actually allowed for some breaks in the cloud
away from the SE coastline this morning. This is likely to be
case much of the day, with sct bkn clouds inland, to bkn ovc
conditions across SE ma and ri, closer to the trapped moisture
attendant to the stalled frontal boundary. Primary update this
morning will be to adjust highs up a bit. Even with onshore
flow, the sunshine and mixing should allow temps to be a bit
milder than much of the guidance, although with ssts still in
the low 70s across the gulf of maine, it will still keep temps
generally below mid august normals.

Previous discussion follows...

gusty NE winds continue to work down E coastal mass early this
morning with tight pressure gradient surge as the front stalled
e of the central nj coast and just N of 40n latitude as seen on
latest surface analysis. Noting wind gusts up to around 20 kt
across E mass into ri, with sustained winds up to 10-15 mph.

Bands of light showers continue to move onshore mainly S of the
mass pike as seen on latest kbox 88d radar imagery. Noting
brief visibility restrictions with the showers, along with
patchy drizzle and fog along the immediate E coast. Scattered
showers also continue across the southern waters and into the
southern islands.

Short range high res and global models continue to signal
patchy drizzle, showers and fog across E coastal areas into
portions of NE ct and ri through the day, with the best chance
along S coastal areas and the southern coastal waters.

Dewpoints slowly but steadily fall during the day, especially
across central and western areas, with readings in the upper 50s
to around 60 there. It will be a bit more humid where the ne
flow persists across E mass into ri. Temps will top off at
around 70 degrees along the E coastal, ranging to the mid and
upper 70s across the ct valley.

Short term 6 pm this evening through 6 pm Monday
High pressure ridge from the maritimes across northern new
england will slowly nose southward tonight and Monday. Will see
leftover low level moisture across NE ct ri SE mass with light
scattered showers tonight, which will slip S overnight. Even so,
might still see spotty showers lingering across portions of
cape cod and the islands into Monday with a persistent NE wind
flow there.

With the onshore flow, temps will run close to or below seasonal
normals, especially on Monday as highs will only be in the 70s.

Dewpoints across eastern areas and especially along the coast
will remain relatively high, mainly in the lower-mid 60s tonight
and Monday.

Long term Monday night through Saturday
Highlights...

* more humid with showers storms Tuesday night and Wednesday
* dry Thursday into next weekend with lower humidity building
into the weekend.

Overview and model preferences...

a cutoff, stalled within weak flow S of the mean n-stream jet
continues to weaken Mon night into tue. Inverted ridging
results, linked to a maritimes high pres. The production of
onshore flow from within this inverted ridging will keep highs
below normal, but lows above thanks to marine influence. Wed,
deepening wave linked to a vortex near nunavut will draw
tropical moisture back toward new england. While the parent low
pres linked to the wave will shift into N new england, frontal
lift will allow for some convective shra tsra into Wed night.

Trof axis shifts E Thu and lifts, allowing bermuda high to once
again force warmer, humid air back toward new england with
rising heights into the weekend. This will bring about a return
of seasonably warm and humid conditions.

Temperatures...

onshore flow continues through tue, drawing air off the gulf of
maine where ssts rest in the low 70s near shore. This will
limit highs Tue wed, keeping them mainly below normal (mid to
upper 70s most likely). Overnight mins mild, as dwpts remain in
the low-mid 60s. Late week expected to be more comfortable as
dwpts drop into the 50s Fri before rising back into the 60s by
late weekend. Highs will once again rise late week, likely
exceeding seasonal normals through the weekend, (mid to upper
80s).

Precipitation...

aside from drizzle linked to onshore flow mainly dry conditions
linger into tue. Widespread shra tsra likely Wed as a weak warm
front, then cold front shift across the region. Noting pwats
near or even above 2.00 inches or nearly 2 std deviations above
normal. Combine this with LLJ near 30 kt and reasonably high
ensemble probs of CAPE +500j kg, and a risk for heavy rain is
possible. With anomalously high rainfall for early august for
many parts of S new england, will need to monitor for flood
potential Wed and Wed night. Into the weekend, mainly dry wx
expected as high pres near 1030hpa builds across new england.

Aviation 12z Sunday through Thursday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday ...

through today... Moderate confidence.

MainlyVFR N of a line from ijd-pym and a mix of MVFR ifr s.

Lowest across the CAPE islands. NE wind gusts 20-25 kt mainly
across the E coast.

Tonight... 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.

Monday... Moderate to high confidence.

MainlyVFR conditions across the ct valley. Areas of MVFR-ifr
cigs move into central and eastern areas by around 04z, lowest
across ri SE mass and CAPE cod and the islands with persistent
ne wind flow.

Kbos terminal... High confidence in taf.VFR today with ne
winds 10-15 kt with gusts up to 20 kt at times. MVFR CIGS by
around 04z tonight.

Kbdl terminal... High confidence in taf.

Outlook Monday night through Thursday ...

Monday night into Tuesday: mainlyVFR.

Tuesday night into Wednesday: mainly MVFR, with areas ifr
possible. Breezy. Chance shra, slight chance tsra, patchy br.

Wednesday night into Thursday: mainlyVFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday ... High confidence.

Today... Persistent NE wind flow with gusts up to 25-30 kt
today. Seas build to around 5-6 ft. Small craft advisories on
all waters except narragansett bay. Scattered showers and patchy
fog linger across the southern waters to about CAPE cod bay
with local visibility restrictions at times.

Tonight and Monday... Ne wind flow continues, but slowly
diminishes during Monday. Gusts to 25 kt continue through
tonight. Seas up to 5-6 ft early, then slowly subside from n-s
late tonight and Monday. Scattered showers linger, becoming more
spotty on Monday but continue across the southern open waters.

Mainly good visibility.

Outlook Monday night through Thursday ...

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

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

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 7 pm edt this evening for anz232.

Small craft advisory until 6 pm edt this evening for anz233-
234.

Small craft advisory until 3 pm edt this afternoon for anz230.

Small craft advisory until 4 pm edt this afternoon for anz231.

Small craft advisory until 3 am edt Monday for anz235-237.

Small craft advisory until 2 am edt Monday for anz250.

Small craft advisory until 8 pm edt this evening for anz251.

Small craft advisory until 6 pm edt Monday for anz254.

Small craft advisory until 4 am edt Monday for anz255.

Small craft advisory until 9 am edt Monday for anz256.

Synopsis... Doody evt
near term... Doody evt
short term... Evt
long term... Doody
aviation... Doody evt
marine... Doody evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 11 mi38 min 67°F3 ft
44020 - NANTUCKET SOUND 19 mi28 min NE 18 G 21 69°F 76°F1014.3 hPa63°F
WAXM3 - Waquoit Bay Reserve, MA 23 mi83 min 2.9 70°F 1014 hPa66°F
BZBM3 - 8447930 - Woods Hole, MA 31 mi38 min 68°F 76°F1014.8 hPa
NTKM3 - 8449130 - Nantucket Island, MA 32 mi38 min NE 12 G 16
44018 - SE Cape Cod 30NM East of Nantucket, MA 32 mi78 min NE 16 G 19 66°F 4 ft1014.7 hPa (+1.7)62°F
44013 - BOSTON 16 NM East of Boston, MA 49 mi78 min NE 18 G 21 67°F 69°F4 ft1014.8 hPa62°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, MA8 mi72 minNE 1110.00 miOvercast68°F62°F81%1014 hPa
Chatham, Chatham Municipal Airport, MA10 mi76 minNE 9 G 1810.00 miOvercast68°F61°F78%1014.5 hPa
Provincetown Municipal Airport, MA18 mi72 minNE 1110.00 miOvercast66°F62°F87%1015.2 hPa
Otis Air National Guard Base, MA20 mi73 minNNE 14 G 2310.00 miOvercast66°F62°F88%1014.9 hPa

Wind History from HYA (wind in knots)
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SW12SW17SW15SW14NW7N6NW3CalmN4NE9NE12
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2 days agoW7W6W6SW10SW14SW11SW11W9W5W3N4CalmCalmCalmCalmCalmCalmCalmCalmCalmNE3CalmE4S6

Tide / Current Tables for Sesuit Harbor, East Dennis, Cape Cod Bay, Massachusetts
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Sesuit Harbor
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Sun -- 12:06 AM EDT     Moonset
Sun -- 12:10 AM EDT     0.60 feet Low Tide
Sun -- 05:53 AM EDT     Sunrise
Sun -- 06:29 AM EDT     9.13 feet High Tide
Sun -- 12:26 PM EDT     1.06 feet Low Tide
Sun -- 02:47 PM EDT     Moonrise
Sun -- 06:50 PM EDT     9.88 feet High Tide
Sun -- 07:34 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.612.13.867.9998.16.54.52.51.21.32.33.85.989.59.99.27.85.93.6

Tide / Current Tables for Pollock Rip Channel, Massachusetts Current
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Pollock Rip Channel
Click for Map
Sun -- 12:06 AM EDT     Moonset
Sun -- 01:42 AM EDT     1.91 knots Max Flood
Sun -- 04:41 AM EDT     -0.00 knots Slack
Sun -- 05:52 AM EDT     Sunrise
Sun -- 07:30 AM EDT     -1.49 knots Max Ebb
Sun -- 10:34 AM EDT     0.00 knots Slack
Sun -- 02:11 PM EDT     1.80 knots Max Flood
Sun -- 02:46 PM EDT     Moonrise
Sun -- 05:04 PM EDT     -0.00 knots Slack
Sun -- 07:33 PM EDT     Sunset
Sun -- 07:59 PM EDT     -1.55 knots Max Ebb
Sun -- 11:05 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.81.91.50.7-0.3-1.1-1.4-1.4-1.1-0.50.31.11.61.81.710.1-0.8-1.4-1.5-1.4-0.9-0.1

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 (10,2,3,4)
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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.