Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Marshfield Hills, MA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:48AMSunset 7:34PM Sunday April 22, 2018 2:56 AM EDT (06:56 UTC) Moonrise 11:31AMMoonset 1:37AM Illumination 44% Phase: First Quarter Moon; Moon at 7 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 Apr 22 2018
Rest of tonight..NW winds 5 to 10 kt. Waves 1 foot or less.
Sun..NW winds 5 to 10 kt, becoming ne in the afternoon. Waves 1 foot or less.
Sun night..S winds around 5 kt, becoming nw after midnight. Waves 1 foot or less.
Mon..N winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less.
Mon night..S winds 5 to 10 kt. Waves 1 foot or less.
Tue..S winds 5 to 10 kt. Waves 1 foot or less.
Tue night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of rain.
Wed..SE winds 5 to 10 kt. Waves around 2 ft. Rain likely.
Wed night..SE winds 5 to 10 kt. Waves around 2 ft. Rain likely.
Thu..S winds 5 to 10 kt. Waves 1 foot or less. A chance of rain.
Thu night..W 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 116 Am Edt Sun Apr 22 2018
Synopsis for massachusetts and rhode island coastal waters.. High pressure will build over the waters overnight through Monday, then shift offshore on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters on Thursday. 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 220603
afdbox
area forecast discussion
national weather service boston norton ma
203 am edt Sun apr 22 2018

Synopsis
High pressure remains in control through Tuesday bringing dry
weather with moderating temperatures. Wet weather returns
Wednesday into Thursday as low pressure moves through our
region. Mainly dry weather follows on Friday before becoming
dreary again next weekend.

Near term through today
High pressure builds over the region today. Moisture cross
sections show a moist layer between 750 mb and 850 mb this
afternoon. This may be enough to generate a few clouds above
5000 feet, but otherwise a sunny day.

The light pressure gradient will mean light winds today, but
will also be favorable for sea breezes developing along the
coast during the late morning midday and continuing through
afternoon.

Mixing yesterday reached to nearly 750 mb, per 00z soundings.

Model cross sections show mixing to 800 mb today. Temperatures
at that level will be -5c to -6c, which is equivalent to 0c to
-1c at 850 mb. Fully mixed, this would favor MAX sfc temps in
the upper 50s and around 60. Mixing a little deeper would
support MAX temps 60-65. Cooler temperatures near the coast due
to the sea breeze.

Short term tonight through 6 pm Monday
High pressure remains overhead tonight and Monday. Expect
radiational cooling tonight, bringing another chilly night with
areas of frost, even some temps below freezing. Sunny skies on
Monday with light wind, which will again allow developing sea
breezes. Similar deep mixing to today, but with temperatures a
few degrees warmer and supporting sfc MAX temps in the low to
mid 60s away from the cooler coast.

Long term Monday night through Saturday
* highlights...

- warm up early next week
- wet and breezy midweek
- perhaps a reprieve Friday
- more showers possible Saturday
21 12z guidance remained in rather good agreement with the
overall synoptic pattern through Wednesday. Then typical timing
and amplitude differences creep into the solutions. Prefer a
consensus blend to smooth over the less predictable features for
this time range.

Expecting well defined mid level northern and southern stream
features to phase over the central appalachians about mid week.

Guidance remained consistent with that idea from previous runs.

It's how the pattern evolves after this phasing where some
questions remain, particularly with timing. In most cases,
looking like a period of wet weather sometime Wednesday, and
perhaps lingering into Thursday. Depending on timing, another
front may pass through our region sometime Friday into Saturday.

Temperature-wise, looking much closer to normal early next week.

Seabreezes likely on Monday, so cooler towards the coasts. Below
normal temperatures should return mid week, then remain near to
below normal into next weekend.

Aviation 06z 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 ... High confidence.

Vfr through the period with light wind. Coastal seabreezes will
develop midday afternoon, dissipate in the evening, then
redevelop Monday midday afternoon.

Kbos terminal... High confidence in taf. Moderate-high
probability of a sea breeze midday afternoon.

Kbdl terminal... High confidence in taf.

Outlook Monday night through Thursday ... High confidence.

Monday night through Tuesday:VFR.

Tuesday night: mainlyVFR, with local MVFR possible. Breezy.

Chance ra.

Wednesday: mainly MVFR, with areas ifr possible. Breezy. Ra
likely.

Wednesday night: mainlyVFR, with areas ifr possible. Breezy.

Chance ra.

Thursday: mainlyVFR, with local MVFR possible. Chance ra,
slight chance shra.

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.

Light winds and seas. Winds turning onshore near the coast
midday afternoon and again Monday midday afternoon as sea
breezes develop.

Outlook Monday night through Thursday ... High confidence.

Monday night through Tuesday: winds less than 25 kt.

Tuesday night: winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain.

Wednesday: low risk for small craft advisory winds with gusts
up to 25 kt. Local rough seas. Rain likely.

Wednesday night: winds less than 25 kt. Areas of rough seas.

Chance of rain.

Thursday: winds less than 25 kt. Areas of rough seas. Chance of
rain, slight chance of rain showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Wtb belk
near term... Wtb
short term... Wtb
long term... Belk
aviation... Wtb belk
marine... Wtb belk


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 14 mi67 min WNW 5.8 G 5.8 44°F 43°F1 ft1025.3 hPa (+0.7)
BHBM3 - 8443970 - Boston, MA 22 mi39 min 48°F 1025.7 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi113 min 42°F 42°F1 ft1025 hPa
44090 31 mi27 min 42°F
FRVM3 - 8447386 - Fall River, MA 39 mi45 min 42°F 46°F1027.1 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi39 min E 2.9 G 2.9 42°F 1025.9 hPa
FRXM3 40 mi39 min 42°F 30°F
WAXM3 - Waquoit Bay Reserve, MA 41 mi72 min 2.9 42°F 1026 hPa33°F
FOXR1 - 8454000 - Providence, RI 43 mi39 min N 5.1 G 7
PVDR1 43 mi39 min NNW 2.9 G 2.9 45°F 1027 hPa20°F
BZBM3 - 8447930 - Woods Hole, MA 44 mi39 min 42°F 44°F1026.3 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi39 min NNW 5.1 G 6 44°F 46°F1026.7 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi72 min N 5.1 45°F 1004 hPa24°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi39 min N 5.1 G 7

Wind History for Borden Flats Light at Fall River, MA
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W5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA5 mi62 minW 310.00 miFair34°F32°F93%1026.4 hPa
Plymouth, Plymouth Municipal Airport, MA17 mi65 minN 010.00 miFair34°F30°F85%1026.5 hPa
East Milton, MA20 mi61 minNNW 8 mi42°F19°F40%1027.1 hPa
Boston, Logan International Airport, MA22 mi63 minNW 410.00 miFair46°F19°F35%1026.5 hPa
Norwood, Norwood Memorial Airport, MA23 mi64 minN 010.00 miFair38°F30°F73%1026.8 hPa
Taunton, Taunton Municipal Airport, MA24 mi65 minN 08.00 miFair31°F28°F92%1026.6 hPa

Wind History from GHG (wind in knots)
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Last 24hrW4655
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NE83
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E11SE13SE5S5CalmCalmW3CalmNW3CalmW4
1 day agoW75
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W76NW8NW12
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2 days agoCalmCalmCalmCalmCalmCalmCalm44CalmCalmCalmCalmW354Calm3W555
G11
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G14
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G13

Tide / Current Tables for Damons Point, North River, Massachusetts
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Damons Point
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Sun -- 01:36 AM EDT     Moonset
Sun -- 05:03 AM EDT     9.52 feet High Tide
Sun -- 05:51 AM EDT     Sunrise
Sun -- 11:31 AM EDT     Moonrise
Sun -- 11:48 AM EDT     -0.31 feet Low Tide
Sun -- 05:46 PM EDT     First Quarter
Sun -- 05:50 PM EDT     8.43 feet High Tide
Sun -- 07:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.12.957.18.89.597.65.73.61.60.1-0.30.72.54.56.588.47.86.54.83.11.5

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Sun -- 12:38 AM EDT     1.19 knots Max Flood
Sun -- 01:37 AM EDT     Moonset
Sun -- 04:15 AM EDT     -0.00 knots Slack
Sun -- 05:52 AM EDT     Sunrise
Sun -- 07:32 AM EDT     -1.05 knots Max Ebb
Sun -- 11:13 AM EDT     0.00 knots Slack
Sun -- 11:31 AM EDT     Moonrise
Sun -- 01:12 PM EDT     1.07 knots Max Flood
Sun -- 04:52 PM EDT     -0.00 knots Slack
Sun -- 05:46 PM EDT     First Quarter
Sun -- 07:33 PM EDT     Sunset
Sun -- 08:08 PM EDT     -0.84 knots Max Ebb
Sun -- 11:35 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.210.80.2-0.5-0.9-1-1-1-0.8-0.20.71.110.90.5-0.1-0.5-0.8-0.8-0.8-0.8-0.4

Weather Map and Satellite Images
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wmap_A
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 (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.