Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
Marshfield Hills, MA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:58AMSunset 5:58PM Tuesday October 17, 2017 4:23 PM EDT (20:23 UTC) Moonrise 4:29AMMoonset 5:16PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 320 Pm Edt Tue Oct 17 2017
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Wed..W winds 10 to 15 kt with gusts up to 20 kt, becoming sw 5 to 10 kt in the afternoon. Waves around 2 ft.
Wed night..SW winds around 5 kt. Waves 1 foot or less.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Waves around 2 ft.
Thu night..SW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Fri..NW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves 1 foot or less.
Fri night..NW winds 5 to 10 kt. Waves 1 foot or less.
Sat..W winds around 5 kt. Waves 1 foot or less.
Sat night..SW winds around 5 kt. Waves 1 foot or less.
Sun..SW winds 5 to 10 kt. Waves 1 foot or less.
Sun night..SW winds 5 to 10 kt. Waves 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 320 Pm Edt Tue Oct 17 2017
Synopsis for massachusetts and rhode island coastal waters.. Large high pressure will settle across the waters this week. A cold front is expected to cross the region early Fri. 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 Marshfield Hills, MA
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location: 42.16, -70.73     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 171900
afdbox
area forecast discussion
national weather service taunton ma
300 pm edt Tue oct 17 2017

Synopsis
High pressure will maintain dry weather and warmer than normal
temperatures through the weekend.

Near term through tonight
High pres south of new eng tonight with light SW flow
developing. Still decent radiational cooling with clear skies
and dry airmass will allow temps to drop to mid 30s in the
coldest spots with patchy frost. No frost headlines as growing
season has ended in those areas with the best chance of frost.

Some patchy frost possible outside of this area but likely not
widespread enough for headlines. Patchy late night valley fog
possible.

Short term Wednesday through Wednesday night
Wednesday...

with high pres to the south, W SW flow will bring milder
airmass into sne. Airmass remains very dry through column so
plenty of sunshine will push afternoon high temps into the
upper 60s to lower 70s.

Wednesday night...

another clear night with light winds, but airmass is moderating
so not as cool with low temps mostly in the 40s.

Long term Thursday through Tuesday
Highlights...

* above average temps and dry conditions lasting into the weekend
* next shot for precip appears to be around Tuesday
pattern overview confidence...

12z guidance is in good agreement for the long term. Upper level
shortwave will move through the flow on Thursday. Behind this wave,
anomalous ridging will develop across the east coast. Heights and
temperatures will rise to 2-3 std above normal. This strong ridge
will last into early next week before a pattern change appears to
take hold of the area. This switch will be associated with the
digging trough across the eastern half of the CONUS by the Tuesday
timeframe.

Details...

temperature forecast...

overall trend in the forecast is for above average temperatures
through the period. Thursday's breezy southwest flow combined with
850 mb temps near 10-12c will result in highs in the low to mid 70s.

Cool front will sweep through the region Thursday night leading to a
cooler day on Friday. Anomalous ridge will begin to build for the
weekend into Monday resulting in high temps into the mid 70s.

Tuesday's temperature forecast is a bit trickier as it is dependent
on the timing of the front. Thus will trend towards a model
consensus until guidance gets a better handling on the fropa.

Precipitation forecast...

frontal system on Thursday will pass through, but lack of moisture
with the front will lead a dry passage. High pressure will take over
the area on Friday through Monday leading to dry weather. Next
chance or precipitation will be around the Tuesday timeframe when a
potent trough will dig into the ohio valley and towards the east
coast. Several waves of low pressure will ride along this through
resulting in a more unsettled weather pattern Tuesday and beyond.

Aviation 18z 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 ... High confidence.

Vfr through Wed night. Localized late night river valley fog
possible. SW winds may gust to 20 kt over the outer cape
tonight.

Kbos terminal... High confidence in taf. Brief weak seabreeze
possible until 20z, but not included in taf.

Kbdl terminal... High confidence in taf.

Outlook Thursday through Sunday ...

high confidence.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.

Shortwave passing well to the north will bring a period of
increasing W SW winds tonight as high pres settles to the south.

A few gusts to 25 kt possible across mainly eastern ma waters
with building seas so will issue SCA for these waters. Gusts to
20 kt elsewhere. Winds diminish Wed through Wed night.

Outlook Thursday through Sunday ... High confidence.

High pressure prevails through the upcoming weekend with sub sca
conditions. The only exception is that SCA conditions may be
approached Thursday night ahead of a passing front as SW winds could
gust up to 25 kts.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 10 pm this evening to 11 am edt
Wednesday for anz250-254.

Small craft advisory from 10 pm this evening to 7 am edt
Wednesday for anz231-251.

Synopsis... Kjc dunten
near term... Kjc
short term... Kjc
long term... Dunten
aviation... Kjc dunten
marine... Kjc dunten


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 14 mi93 min S 1.9 G 1.9 52°F 60°F2 ft1023.5 hPa (-0.7)
BHBM3 - 8443970 - Boston, MA 22 mi53 min 57°F 1022.4 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi79 min S 5.8 G 9.7 51°F 60°F3 ft1023 hPa
44090 31 mi53 min 60°F2 ft
FRVM3 - 8447386 - Fall River, MA 39 mi53 min 56°F 65°F1024.7 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi53 min SSW 5.1 G 7 56°F 1023.3 hPa
FRXM3 40 mi53 min 56°F 31°F
WAXM3 - Waquoit Bay Reserve, MA 41 mi98 min 1.9 55°F 1024 hPa38°F
PVDR1 43 mi53 min SSE 9.9 G 12 56°F 1023.8 hPa35°F
FOXR1 - 8454000 - Providence, RI 43 mi53 min S 8.9 G 11 56°F 64°F1023.6 hPa
BZBM3 - 8447930 - Woods Hole, MA 44 mi53 min 55°F 64°F1024.3 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi53 min SE 5.1 G 6 54°F 64°F1023.9 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi53 min S 1 G 2.9 56°F 1024.1 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi98 min E 2.9 55°F 1002 hPa33°F
PRUR1 49 mi53 min 55°F 31°F

Wind History for Borden Flats Light at Fall River, MA
(wind in knots)    EDIT      (on/off)   Help
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N10
G13
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N8
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SW16
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G32
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G30
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SW17
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G12
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G14
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G16
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N4
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SW6
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G18
SW14
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA5 mi28 minVar 410.00 miFair54°F35°F51%1023.7 hPa
Plymouth, Plymouth Municipal Airport, MA17 mi31 minVar 310.00 miFair57°F30°F36%1023.8 hPa
East Milton, MA20 mi27 minVar 4 mi55°F27°F34%1024.4 hPa
Boston, Logan International Airport, MA22 mi29 minSSE 510.00 miFair55°F33°F44%1023.1 hPa
Norwood, Norwood Memorial Airport, MA23 mi30 minVar 510.00 miFair60°F30°F32%1023.3 hPa
Taunton, Taunton Municipal Airport, MA24 mi31 minW 510.00 miFair57°F28°F34%1023.7 hPa

Wind History from GHG (wind in knots)
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G13
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NW96
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3NW64
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Calm44
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1 day agoSW11
G27
SW12
G22
SW13
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SW9
G23
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G26
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G30
SW15
G25
SW19
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54W75
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N7
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4CalmCalmCalmCalmSW6SW8SW7
G13
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G17
SW8
G14
SW13SW10
G20

Tide / Current Tables for Damons Point, North River, Massachusetts
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Damons Point
Click for Map
Tue -- 04:24 AM EDT     -0.10 feet Low Tide
Tue -- 04:29 AM EDT     Moonrise
Tue -- 06:58 AM EDT     Sunrise
Tue -- 10:27 AM EDT     9.23 feet High Tide
Tue -- 04:48 PM EDT     0.01 feet Low Tide
Tue -- 05:16 PM EDT     Moonset
Tue -- 05:57 PM EDT     Sunset
Tue -- 10:48 PM EDT     9.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.55.63.31.100.11.33.35.77.99.19.18.26.54.42.10.400.92.54.97.38.99.3

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Tue -- 01:27 AM EDT     -1.39 knots Max Ebb
Tue -- 03:35 AM EDT     0.00 knots Slack
Tue -- 04:30 AM EDT     Moonrise
Tue -- 06:59 AM EDT     Sunrise
Tue -- 06:59 AM EDT     1.26 knots Max Flood
Tue -- 09:49 AM EDT     -0.00 knots Slack
Tue -- 01:54 PM EDT     -1.40 knots Max Ebb
Tue -- 04:01 PM EDT     0.00 knots Slack
Tue -- 05:17 PM EDT     Moonset
Tue -- 05:58 PM EDT     Sunset
Tue -- 07:23 PM EDT     1.23 knots Max Flood
Tue -- 10:05 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-1.3-1.3-0.60.40.81.11.310.4-0.1-0.5-0.9-1.2-1.4-1-00.711.21.10.60-0.4

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (16,3,4,5)
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Ground Weather Radar Station Boston, MA
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weather_mapweather_map weather_map

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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.