Monday, December18, 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 7:05AMSunset 4:15PM Monday December 18, 2017 4:04 AM EST (09:04 UTC) Moonrise 8:07AMMoonset 5:52PM Illumination 0% Phase: New Moon; Moon at 0 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
    EDIT      (on/off)   Help
ANZ230 Boston Harbor- 344 Am Est Mon Dec 18 2017
Today..S winds around 5 kt. Waves 1 foot or less. A chance of light snow. A chance of light rain this afternoon. Patchy fog this afternoon with vsby 1 to 3 nm.
Tonight..SW winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. A chance of light rain. Vsby 1 to 3 nm.
Tue..W winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 25 kt in the afternoon. Waves around 2 ft.
Tue night..W winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt. Waves around 2 ft.
Wed..W winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft.
Wed night..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 1 foot or less.
Thu..NW winds 10 to 15 kt with gusts up to 20 kt. Waves 1 foot or less.
Thu night..NW winds around 5 kt. Waves 1 foot or less.
Fri..E winds 5 to 10 kt. Waves around 2 ft.
Fri night..S winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. Rain likely. 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 344 Am Est Mon Dec 18 2017
Synopsis for massachusetts and rhode island coastal waters.. A weak wave of low pres will move across the south coastal waters today. A cold front will sweep across new england and the coastal waters Tue evening followed by a period of gale force winds. High pres builds across the waters Thu, moving offshore Fri. Strong southerly winds develop Fri night into Sat ahead of a cold front. 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
   Hourly   EDIT   Help
location: 42.16, -70.73     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 180800
afdbox
area forecast discussion
national weather service taunton ma
300 am est Mon dec 18 2017

Synopsis
A weak wave of low pressure will bring some spotty light snow
today, especially in the interior. Milder temperatures return
Tuesday ahead of a cold front, then blustery and colder weather
follows Wednesday into Thursday but with dry weather
prevailing. Low pressure will likely pass to our west Friday
night and Saturday, probably bringing mainly rain and a period
of rather mild temperatures along with some wind. A period of
unsettled weather may return sometime christmas eve into
christmas, but timing and precipitation types are uncertain.

Near term through today
Weak warm advection pattern ahead of a warm front will bring
risk of spotty light snow to sne today. Current area of light
snow is mostly aloft due to dry air, but low levels eventually
moisten up to allow some light snow to develop in western new
eng through daybreak. It appears any snow in eastern new eng
will be more spotty this morning. Any accum will be rather
light, a coating to a half inch, mostly in western new eng with
around an inch in the E slopes of the berkshires.

The afternoon looks mostly dry but can't rule out a continued
threat of spotty light precip. Low level warming below 900 mb
moving up from the south will allow any precip along the south
coast to change to rain by midday. As this low level warming
advances north, there is a low risk of some spotty freezing
rain drizzle late afternoon evening in northern and
particularly northeast ma where temps remain below freezing,
but confidence is low.

Expect a north-south gradient in temps today with highs ranging
from near 30 in northern ma to around 40 along the immediate
south coast, with lower 40s over the islands.

Short term tonight through 6 pm Tuesday
Tonight...

main concern for the evening period is a low risk for spotty
light freezing rain drizzle across northern and northeast ma.

Confidence is low as there may not be any precip. However, there
may be some patchy fog around in the evening and with small
t TD depression tonight and temps settling back near or below
freezing, areas of black ice may develop away from the south
coast.

Tuesday...

next northern stream shortwave and attending cold front
approaches new eng toward evening. Low level warming ahead of
the front and increasing SW winds will allow temps to reach
into the 40s. Mainly dry conditions with some sunshine,
although there is a risk of showers in the western ma in the
afternoon as the front approaches.

Long term Tuesday night through Sunday
Highlights...

* much milder Tue with mainly dry weather
* turning blustery and colder Wed into Thu with dry weather
* mainly rain Fri night Sat with some wind and mild temps favored
* unsettled weather possible sometime christmas eve into christmas
details...

Tuesday night and Wednesday...

a cold front crosses the region region Tue night into early Wed with
colder blustery weather to follow. Mainly dry weather anticipated
other than perhaps a few brief rain snow showers across the east
slopes of the berkshires. Increasing wind will keep low temps tue
night mainly in the upper 20s to the lower 30s. High temps on wed
will generally be in the 30s to around 40, but northwest wind gusts
of 25 to 40 mph will make it feel colder.

Wednesday night and Thursday...

canadian high pressure builds into the region bringing dry but cold
weather. Low temps Wed night should mainly be in the teens, but
some single digits can not be ruled out in the normally coldest
outlying locations. High temps on Thu should mainly be in the
30 to 35 degree range, but with less wind than on wed.

Friday and Saturday...

upper level ridging will be building across the southeast states as
a shortwave trough lifts northeast towards the great lakes. While
it is too early to completely lock in a solution... The given pattern
and ensemble guidance strongly favors low pressure passing to our
northwest putting us on the mild side of the storm. Timing still
uncertain, but most guidance keeps the daytime hours dry with bulk
of the rain Friday night and or Saturday. Now there initially is
still canadian high pressure which slides off to the east, so can
not rule out the low risk for a bit of snow ice at the onset
across the interior. Regardless, mainly rain is favored Friday
night into Saturday across the entire region. In fact, temps
could climb well into the 50s to near 60 for a time along with a
period of strong southerly winds.

Christmas eve into christmas...

very low confidence forecast in this time range. Upper level ridge
with abnormally high height fields will be anchored off the
southeast coast. Meanwhile, a dome of arctic air and well below
normal temperatures will be invading much of the central states.

This will place our region in the battle ground between these
extreme airmasses. A couple waves of low pressure will likely track
along the baroclinic zone and bring the risk for a period or two of
precipitation sometime christmas eve into christmas. Timing ptypes
and will depend on exactly where the baroclinic zone aligns. While
snow is certainly an option especially at this time range... Given
strength of southeast upper level ridge would favor rain ice. If we
do have enough cold air for wintry precipitation, it might end up
coming down shallow given rather high height fields which could
possibly result in more of an ice threat than snow.

Aviation 07z Monday through Friday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday ...

through 12z... CIGS lowering to MVFR 06-09z western new eng and
toward 12z in the east. Some light snow developing, mainly in
the interior.

Monday... Moderate confidence.

Widespread MVFR CIGS with a few spots lowering to ifr. Spotty
light snow in the morning, changing to light rain south coast.

Patchy fog may develop late and there is a low risk for some
light freezing rain drizzle in NE ma late afternoon.

Monday night... Moderate confidence.

Potential for patchy fog and stratus with ifr in the evening,
improving toVFR overnight. Low risk for some light freezing
rain drizzle NE ma in the evening.

Tuesday... Moderate confidence.

MainlyVFR, with patchy MVFR CIGS possible in the interior.

Increasing SW winds in the afternoon with gusts to 25 kt
possible.

Kbos terminal... Moderate confidence. Spotty light snow possible
this morning. Low risk for spotty -fzra fzdz late
afternoon evening but better chance may be to the north.

Kbdl terminal... Moderate confidence. Some light snow may impact
the terminal 08-12z.

Outlook Tuesday night through Friday ...

Tuesday night: mainlyVFR, with local MVFR possible. Windy with
gusts to 35 kt.

Wednesday:VFR. Windy with gusts to 35 kt.

Wednesday night through Thursday:VFR. Breezy.

Thursday night:VFR.

Friday:VFR. Breezy.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday ... High confidence.

Today... Winds becoming southerly and increasing in the
afternoon but gusts below 20 kt. Light seas. Spotty light snow
or rain possible. Good vsbys.

Tonight... Sw winds below sca. Gusts to 20 kt. Seas below sca.

Tuesday... Increasing SW winds with gales likely developing by
late afternoon. Will issue a gale watch for late afternoon
through Tue night. Gusts to 40 kt possible.

Outlook Tuesday night through Friday ...

Tuesday night: moderate risk for gale force winds with gusts up
to 35 kt. Areas of rough seas.

Wednesday: low risk for gale force winds with gusts up to
35 kt. Areas of rough seas.

Wednesday night: moderate risk for small craft advisory winds
with areas of gusts up to 30 kt. Local rough seas.

Thursday: low risk for small craft advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft.

Thursday night: winds less than 25 kt.

Friday: low risk for small craft advisory winds with gusts up
to 25 kt.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

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


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 14 mi75 min N 3.9 G 5.8 28°F 46°F1 ft1023.6 hPa (+0.0)
BHBM3 - 8443970 - Boston, MA 22 mi47 min 23°F 1022.9 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi121 min WNW 3.9 G 5.8 26°F 46°F1 ft1023.8 hPa
44090 31 mi35 min 45°F1 ft
FRVM3 - 8447386 - Fall River, MA 39 mi47 min 27°F 40°F1023.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi47 min NE 5.1 G 7 28°F 1022.2 hPa
FRXM3 40 mi47 min 28°F 7°F
WAXM3 - Waquoit Bay Reserve, MA 41 mi80 min 1.9 25°F 1024 hPa11°F
PVDR1 43 mi47 min NNE 4.1 G 6 27°F 1023.3 hPa9°F
FOXR1 - 8454000 - Providence, RI 43 mi47 min E 4.1 G 5.1 26°F 43°F1022.9 hPa
BZBM3 - 8447930 - Woods Hole, MA 44 mi47 min 29°F 42°F1023.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi47 min NE 6 G 7 27°F 40°F1023 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi53 min E 5.1 G 8.9 29°F 1022.9 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi80 min E 4.1 29°F 1002 hPa12°F
PRUR1 49 mi47 min 29°F 10°F

Wind History for Borden Flats Light at Fall River, MA
(wind in knots)    EDIT      (on/off)   Help
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
-12
PM
11
PM
12
AM
1
AM
2
AM
3
AM
Last
24hr
NW8
NW6
NW7
NW7
NW4
NW6
NW8
G11
NW10
G13
NW10
G13
NW7
W8
NW9
NW6
NW4
NW3
NW2
NW4
NW2
NE3
N3
E2
NE3
NE2
1 day
ago
W11
G14
W14
G17
W14
G17
W15
G20
W17
G21
W18
W18
G22
W19
W19
W18
W15
G19
W17
W13
NW12
G16
NW14
G18
NW8
G11
W8
G11
NW11
G15
NW9
W10
G15
NW8
NW6
W6
NW7
G10
2 days
ago
W8
G11
W7
G10
W4
NW4
SW4
SW6
SW5
SW3
NW1
SW2
SW3
N4
NE6
E2
SE2
NE1
N2
NW6
N3
NW5
W5
W11
G14
W10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA5 mi70 minW 310.00 miA Few Clouds23°F14°F68%1024 hPa
Plymouth, Plymouth Municipal Airport, MA17 mi73 minN 010.00 miOvercast23°F14°F68%1024 hPa
East Milton, MA20 mi2.1 hrsNE 5 mi22°F3°F44%1024.2 hPa
Boston, Logan International Airport, MA22 mi71 minN 410.00 miOvercast22°F6°F50%1024.1 hPa
Norwood, Norwood Memorial Airport, MA23 mi72 minN 010.00 miMostly Cloudy23°F16°F74%1024.3 hPa
Taunton, Taunton Municipal Airport, MA24 mi73 minN 010.00 miOvercast22°F17°F82%1023.7 hPa

Wind History from GHG (wind in knots)
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
Last 24hrW44W4445
G11
NW8
G14
NW7
G13
NW8
G14
555CalmCalmCalmW3CalmCalmCalmW3W3CalmCalmCalm
1 day agoW66W6W6W8
G15
W7
G12
6
G16
W7
G16
W9W12W10
G18
W7
G14
W6
G11
66W6544Calm3W3W3W3
2 days agoSW3CalmW3CalmW3W4Calm34CalmCalmCalmCalmCalmCalmW3W3CalmCalmCalm4Calm3W4

Tide / Current Tables for Damons Point, North River, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Damons Point
Click for Map
Mon -- 01:31 AM EST     New Moon
Mon -- 05:27 AM EST     0.83 feet Low Tide
Mon -- 07:06 AM EST     Sunrise
Mon -- 07:06 AM EST     Moonrise
Mon -- 11:25 AM EST     9.17 feet High Tide
Mon -- 04:12 PM EST     Sunset
Mon -- 04:52 PM EST     Moonset
Mon -- 06:02 PM EST     -0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
87.15.73.92.1112.13.8689.198.16.54.52.40.6-00.51.93.85.97.6

Tide / Current Tables for Boston Harbor, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Boston Harbor
Click for Map
Mon -- 01:31 AM EST     New Moon
Mon -- 02:53 AM EST     -1.22 knots Max Ebb
Mon -- 04:54 AM EST     0.00 knots Slack
Mon -- 07:08 AM EST     Sunrise
Mon -- 07:08 AM EST     Moonrise
Mon -- 08:17 AM EST     1.16 knots Max Flood
Mon -- 10:51 AM EST     -0.00 knots Slack
Mon -- 03:14 PM EST     -1.34 knots Max Ebb
Mon -- 04:13 PM EST     Sunset
Mon -- 04:52 PM EST     Moonset
Mon -- 05:22 PM EST     0.00 knots Slack
Mon -- 08:43 PM EST     1.13 knots Max Flood
Mon -- 11:18 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-0.8-1.1-1.2-0.80.10.811.110.5-0.1-0.5-0.9-1.1-1.3-1.2-0.40.50.91.11.10.70.2

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (4,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.