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Marine Weather and Tides Sandwich, MA Version 3.4

NOTICE 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 6:22AM

Sunset 6:49PM

Tuesday September 17, 2019 6:47 AM EDT (10:47 UTC)

Moonrise 8:47PM

Moonset 9:28AM

Illumination 89%

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.

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7 Day Forecast for Marine Location Near Sandwich CDP, MA

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Area Discussion for - Boston, MA

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Fxus61 kbox 170717 afdbox area forecast discussion national weather service boston norton ma 317 am edt Tue sep 17 2019 Synopsis High pressure will continue to bring an extended period of mainly dry weather right through this weekend. This high pressure will initially be accompanied by below normal temperatures into Thursday morning. A warmup occurs thereafter with above normal temperatures expected by this weekend. The next best chance at any rainfall in the form of showers is forecast for early next week. Near term through today High pressure over eastern canada will be the dominant feature for our weather today. Expecting a N to NE flow to develop, with colder air being push across southern new england. Plenty of sunshine today will take a bit of the edge off this colder air. Slightly below normal high temperatures, lowest near the immediate east coast, CAPE and islands. Short term tonight through 6 pm Wednesday Onshore flow continues tonight into Wednesday. Colder air will continue to flow into our region, with Wednesday probably being the coldest day this week. As temperatures lower, expecting marine stratus to develop and move onshore. The layer of higher moisture content is rather shallow beneath a substantial subsidence inversion. Temperature differential for ocean enhancement is impressive for mid september. There may be a few sprinkles to contend with tonight into Wednesday morning. Long term Wednesday night through Monday Highlights... - mild days, cool nights through the week, dry throughout - turning warmer over the weekend into next week - next chance of rain may not be till early next week details... transitioning warmer? Mild days, cool nights through this week. But by this weekend into the following week, we could see warmer than average conditions. Positive teleconnections across the board minus the pna. Wpo epo strongest into late september signaling a strong pacific jet into western N america. Mid- latitude energy downsheared across the W CONUS as a prominent mjo is forecast over the W hemisphere africa (phase 1 8), the potential combination N atlantic tropical waves latent heat release with favorable downstream E CONUS ridging from an onshore mild pacific jet supports warmer than average conditions advertised by CPC 6-10 8-14 day outlooks. All signs point towards higher heights late september across new england. With that there does not seem to be much rainfall opportunity. Ensembles showing out through the rest of the month there's an sw-ne E CONUS axis into S new england of less than an inch of total rainfall. Deterministic forecast guidance highlights our next best chance of rainfall early the following week. Looks like we're in store for a long period of dry weather which is not atypical as september is one of more drier months on average. Neither is warmer than average temperatures. A glance back at records for late september, we've observed upper 80s to low 90s for highs. An ensemble blend forecast with lower certainty on specifics further out in the forecast. Warming trend into the weekend as high pressure shifts E and S SW winds prevail prior to a sweeping cold front early the following week with a chance of showers. Could see a brief cool down thereafter before warmer weather builds back in as we go into autumn. Aviation 07z Tuesday through Saturday Forecaster confidence levels...

low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Wednesday ... today...VFR. N wind becoming NE at 5 to 15 kt. Gusts up to 20 kt may occur across the CAPE and islands by mid to late afternoon. Tonight and Wednesday... MainlyVFR. A period of MVFR ceilings may develop along with a passing sprinkle or two possible across portions of SE ma and ri late tonight into Wednesday morning. Kbos terminal... High confidence in taf. Kbdl terminal... High confidence in taf. Outlook Wednesday night through Saturday ... Wednesday night through Thursday:VFR. Breezy. Thursday night through Saturday:VFR. Marine Forecaster confidence levels... low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. Short term through Wednesday ... High confidence. Today... N NE wind gusts up to 20 knots. May see a few gusts approaching 25 knots across some of our southeast waters. Seas 2-4 ft. Tonight and Wednesday... Ne wind gusts around 20 knots at times in the cool air advection pattern. Gusts increasing up to around 25 kt Wednesday afternoon. Seas increasing 3-5 ft by early Wednesday morning across the open waters. Will need to consider small craft advisories with later forecasts. Outlook Wednesday night through Saturday ... Moderate confidence. Wednesday night: low risk for small craft advisory winds with gusts up to 25 kt. Areas of rough seas. Thursday through Thursday night: winds less than 25 kt. Local rough seas. Friday through Friday night: winds less than 25 kt. Rough seas up to 10 ft. Saturday: winds less than 25 kt. Areas of rough seas. Box watches warnings advisories Ct... None. Ma... None. Ri... None. Marine... None. Synopsis... Belk sipprell near term... Belk short term... Belk long term... Sipprell aviation... Belk sipprell marine... Belk sipprell

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
44090	9 mi	17 min			64°F	2 ft
WAXM3 - Waquoit Bay Reserve, MA	14 mi	62 min	WNW 1	52°F			1018 hPa	50°F
BZBM3 - 8447930 - Woods Hole, MA	20 mi	47 min		60°F	69°F		1018.1 hPa (+0.5)
44020 - NANTUCKET SOUND	23 mi	27 min	N 14 G 18	62°F	69°F			56°F
44018 - SE Cape Cod 30NM East of Nantucket, MA	35 mi	57 min	NNW 14 G 16	61°F		3 ft	1017.5 hPa (+0.5)	51°F
FRXM3	37 mi	53 min		53°F				47°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA	37 mi	47 min	N 1 G 2.9	55°F			1018.6 hPa (+0.3)
BUZM3 - Buzzards Bay, MA	39 mi	47 min	N 16 G 18	61°F			1018.4 hPa (-0.0)
NTKM3 - 8449130 - Nantucket Island, MA	40 mi	47 min	N 7 G 13	63°F	69°F		1017.7 hPa (+0.5)
44013 - BOSTON 16 NM East of Boston, MA	40 mi	57 min	NNW 16 G 18	60°F	65°F	3 ft	1016.8 hPa (-0.0)	51°F
PRUR1	45 mi	47 min		58°F				49°F
NAXR1 - Narragansett Bay Reserve, RI	46 mi	62 min	N 4.1	56°F			1018 hPa	49°F
CPTR1 - 8452944 - Conimicut Light, RI	46 mi	47 min	NNW 8.9 G 11	59°F	68°F		1018.6 hPa (+0.3)
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI	46 mi	47 min	NNE 2.9 G 7	57°F			1019.1 hPa (-0.0)
PVDR1	47 mi	47 min	NW 2.9 G 4.1	55°F			1018.9 hPa (+0.3)	46°F
NWPR1 - 8452660 - Newport, RI	48 mi	47 min	N 5.1 G 7	60°F	63°F		1018.5 hPa (+0.4)
FOXR1 - 8454000 - Providence, RI	48 mi	47 min	NNW 6 G 7	58°F	67°F		1018.6 hPa (+0.3)

Wind History for Borden Flats Light at Fall River, MA

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N5

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SE8 G11

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SE11 G15

SE14 G18

SE11 G16

S15 G20

S16 G24

S17 G24

S15 G20

S12 G18

S13 G19

S11 G14

S12 G17

SW13 G16

S11 G14

SW12 G17

S9 G13

SW12 G16

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SW7

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W5

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Otis Air National Guard Base, MA	9 mi	2 hrs	NNW 4	10.00 mi	Fair	50°F	46°F	88%	1017.6 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA	13 mi	1.9 hrs	W 3	10.00 mi	Fair	55°F	51°F	87%	1016.9 hPa
Plymouth, Plymouth Municipal Airport, MA	16 mi	1.9 hrs	NW 4	10.00 mi	Fair	51°F	46°F	86%	1017.7 hPa
Provincetown Municipal Airport, MA	22 mi	1.9 hrs	N 8	10.00 mi	Fair	60°F	55°F	84%	1017.3 hPa
Marshfield Airport, MA	24 mi	1.9 hrs	N 0	10.00 mi	Fair	50°F	50°F	100%	1017.6 hPa

Link to 5 minute data for KFMH

Wind History from FMH (wind in knots)

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N5

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S14 G19

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SW14 G19

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W9

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Tide / Current Tables for Cape Cod Canal (East Entrance), Massachusetts

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Tide / Current Tables for Cape Cod Canal, Massachusetts Current

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Weather Map

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GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Boston, MA (6,6,7,8)

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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.