Tuesday, August21, 2018 L-36.com


Marine Weather and Tides
Sandwich, MA

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 5:55AMSunset 7:32PM Tuesday August 21, 2018 6:00 PM EDT (22:00 UTC) Moonrise 4:36PMMoonset 1:29AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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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7 Day Forecast for Marine Location Near Sandwich CDP, MA
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location: 41.78, -70.49     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 212037
afdbox
area forecast discussion
national weather service boston norton ma
437 pm edt Tue aug 21 2018

Synopsis
A low pressure system will bring two rounds of scattered showers
and embedded thunderstorms. The first very late tonight into
Wednesday morning, then a second round Wednesday afternoon along
with the return of high humidity. High pressure will then
follow, bringing mainly dry and comfortable weather Thursday
and Friday. Dry weather will likely persist through the weekend
although it will turn a bit warmer. Very warm to hot
temperatures along with humid conditions may return by early
next week.

Near term until 6 am Wednesday morning
Light drizzle showers still lingered around the CAPE and
islands. Not expecting that to change much late this afternoon.

Clouds will remain more prevalent across the eastern half of
southern new england. Farther west, mostly sunny skies are more
likely. Tweaked temperatures for the rest of this afternoon to
reflect observed trends.

Overnight, the main concerns will be the progress of a low
pressure and its warm front. Have high confidence in this low
pressure moving through the great lakes into canada. Have lower
confidence in the timing of a warm front. Many members of the
21 12z guidance suite suggest this front could move into
northern new england before daybreak. Thinking is this likely a
bit too quick. Have more confidence in a warm frontal passage in
the 8-11 am Wednesday time range.

This could be key to weather outcomes. The higher dew points
will be south of this warm front. These higher dew points will
provide the fuel for local downpours, as well as lowering cloud
bases. Some of the higher resolution short-term guidance suggest
high values of shear in the 0-1 km layer. Thus, still need to
be wary of rotating thunderstorms.

A caveat to this will be the time of day. Instability should not
be very high overnight, but would be a little higher if our
region can tap into the higher dew points south of the warm
front. At this point, have much more confidence in the potential
for locally heavy rainfall.

Short term 6 am Wednesday morning through Wednesday night
* a few strong to severe storms possible
* localized street flooding possible, too
Wednesday...

once our region firmly gets into the warm sector, looking at a
strong southerly low level jet to help recharge the instability
for Wednesday afternoon. Current timing for a cold front is
during the afternoon and evening. The quicker sunshine develops
in the morning, the greater the risk for strong to severe
thunderstorms during the afternoon and evening.

Otherwise, still expecting another day of higher heat and
humidity. This should start to an end later Wednesday night, as
drier air arrives behind a cold front.

Long term Thursday through Tuesday
Highlights...

* dry and comfortable weather Thu into the weekend
* very warm to hot humid weather likely returns early next week
Thursday and Friday... .

Large high pressure will be in control of our weather Thursday
and Friday. This will bring rather cool nights with lows mainly
in the 50s... But some upper 40s possible in the normally coolest
outlying locations. Highs should be in the upper 70s to the
lower 80s with plenty of sunshine low humidity.

Saturday and Sunday...

the high pressure system slowly moves off the coast this
weekend. However, mainly dry weather will likely prevail with
the lack of synoptic scale forcing. Temperatures will also
moderate a bit, mainly looking at highs in the lower to middle
80s.

Monday and Tuesday...

upper level ridge to our south will pump a west southwest flow
of unseasonable warmth humidity into southern new england early
next week. This is supported by most long range guidance, but
uncertainty in regards to just how above normal temperatures
get. The potential exists for a return of 90+ degree heat. There
probably will also be at least some risk for a few
thunderstorms, but low confidence especially in regards to
timing.

Aviation 20z Tuesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ...

through 00z...

hold MVFR-ifr CIGS over a majority of southeastern terminals.

Perhaps interior sct by then before dropping down again this
evening. E winds around 10 kts.

Tonight...

MVFR-ifr becoming widespread yet again. Onset -ra with isolated
tsra towards morning. With any -ra, dropping vsbys down to ifr
given forecast soupy conditions with increasing S flow. Marginal
llws possible by morning as a warm front approaches.

Wednesday...

beginning early morning, widespread -shra with embedded
tsra shra. Anticipating mainly MVFR-ifr conditions with isolated
lifr. A brief lull around noon to 2 pm, before another round of
tsra shra is possible with tempo ifr, if not already, before
clearing out.

Wednesday night...

mainlyVFR.

Kbos terminal... Hold MVFR for today, can't rule out brief,
tempo improvement toVFR. E winds prevailing up around 10 kts.

Kbdl terminal... High confidence in taf.

Outlook Thursday through Sunday ...

Thursday through Saturday night:VFR.

Sunday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ... High confidence.

Low risk for a brief waterspout late tonight as a warm front
moves across the waters. Vsby lowered at times in morning fog
and scattered thunderstorms, then improving before second round
of thunderstorms in the afternoon.

Some risk for small craft advisories along the southern outer
coastal waters due to marginal 25 kt gusts and 5 ft seas.

Outlook Thursday through Sunday ...

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

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

Friday through Sunday: winds less than 25 kt.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from noon to 8 pm edt Wednesday for
anz232-233.

Small craft advisory from noon Wednesday to 11 am edt Thursday
for anz235-237.

Small craft advisory from 9 am Wednesday to 7 am edt Thursday
for anz250.

Small craft advisory from 9 am Wednesday to 6 pm edt Thursday
for anz254>256.

Synopsis... Belk frank
near term... Belk
short term... Belk
long term... Frank
aviation... Belk frank
marine... Belk frank


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 9 mi30 min 69°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 14 mi75 min 1.9 70°F 1017 hPa65°F
BZBM3 - 8447930 - Woods Hole, MA 20 mi30 min 70°F 74°F1016.7 hPa
44020 - NANTUCKET SOUND 23 mi20 min NE 9.7 G 12 68°F 74°F1016.7 hPa65°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 35 mi70 min NE 3.9 G 5.8 67°F 4 ft1017.7 hPa (-1.4)65°F
FRVM3 - 8447386 - Fall River, MA 36 mi30 min 76°F 74°F1017 hPa
FRXM3 37 mi30 min 72°F 64°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 37 mi30 min E 8.9 G 11 73°F 1016.5 hPa
BUZM3 - Buzzards Bay, MA 39 mi120 min ENE 7 G 8 69°F 1018 hPa (-1.5)
44013 - BOSTON 16 NM East of Boston, MA 40 mi70 min ENE 5.8 G 7.8 67°F 69°F4 ft1017.3 hPa (-1.4)64°F
NTKM3 - 8449130 - Nantucket Island, MA 40 mi30 min NE 5.1 G 8.9 68°F 73°F1016.8 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi30 min E 6 G 8 73°F 1016.5 hPa
CPTR1 - 8452944 - Conimicut Light, RI 46 mi30 min E 8 G 9.9 73°F 74°F1016.5 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi75 min E 6 75°F 1017 hPa66°F
PVDR1 47 mi30 min E 6 G 8 73°F 1016.7 hPa65°F
FOXR1 - 8454000 - Providence, RI 48 mi30 min SSE 6 G 8 73°F 73°F1015.8 hPa
NWPR1 - 8452660 - Newport, RI 48 mi30 min ESE 7 G 9.9 72°F 69°F1016.4 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA9 mi65 minNNE 710.00 miOvercast68°F64°F88%1017.6 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA13 mi64 minNNE 410.00 miOvercast70°F64°F84%1016.9 hPa
Plymouth, Plymouth Municipal Airport, MA16 mi68 minNE 710.00 miOvercast69°F62°F78%1017.6 hPa
Provincetown Municipal Airport, MA22 mi64 minENE 710.00 miOvercast70°F64°F82%1017.6 hPa
Marshfield Airport, MA24 mi65 minVar 410.00 miOvercast70°F64°F83%1017.6 hPa

Wind History from FMH (wind in knots)
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2 days agoNE9CalmCalmCalmCalmNE12
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Tide / Current Tables for Cape Cod Canal (East Entrance), Massachusetts
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Cape Cod Canal (East Entrance)
Click for Map
Tue -- 01:29 AM EDT     Moonset
Tue -- 02:11 AM EDT     1.19 feet Low Tide
Tue -- 05:56 AM EDT     Sunrise
Tue -- 08:30 AM EDT     7.49 feet High Tide
Tue -- 02:27 PM EDT     1.68 feet Low Tide
Tue -- 04:36 PM EDT     Moonrise
Tue -- 07:33 PM EDT     Sunset
Tue -- 08:42 PM EDT     8.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.61.91.21.52.33.55.16.67.47.46.964.52.81.81.82.63.85.57.28.48.687

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Tue -- 12:13 AM EDT     0.03 knots Slack
Tue -- 01:29 AM EDT     Moonset
Tue -- 03:37 AM EDT     3.72 knots Max Flood
Tue -- 05:57 AM EDT     Sunrise
Tue -- 06:47 AM EDT     -0.01 knots Slack
Tue -- 09:25 AM EDT     -3.75 knots Max Ebb
Tue -- 12:40 PM EDT     0.01 knots Slack
Tue -- 03:57 PM EDT     3.55 knots Max Flood
Tue -- 04:36 PM EDT     Moonrise
Tue -- 06:59 PM EDT     -0.10 knots Slack
Tue -- 07:33 PM EDT     Sunset
Tue -- 09:49 PM EDT     -4.01 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.32.33.33.73.73.42.5-1.3-3.1-3.7-3.7-3.2-2.11.52.83.43.53.42.7-0.1-2.9-3.8-4-3.7

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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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.