Monday, October21, 2019 L-36.com


Marine Weather and Tides
Winthrop Town, MA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
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

Sunrise 7:02AMSunset 5:54PM Monday October 21, 2019 3:09 AM EDT (07:09 UTC) Moonrise 12:00AMMoonset 2:23PM Illumination 49% Phase: Third Quarter Moon; Moon at 22 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 Mon Oct 21 2019
Rest of tonight..E winds around 5 kt. Waves 1 foot or less.
Mon..NE winds 5 to 10 kt. Waves around 3 ft.
Mon night..NE winds 5 to 10 kt. Waves 1 foot or less, except 3 to 4 ft at the outer harbor entrance. Patchy fog in the evening.
Tue..NE winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. A chance of light rain and drizzle.
Tue night..E winds around 10 kt with gusts up to 20 kt, becoming se after midnight. Waves around 2 ft in the evening, then 1 foot or less. At the outer harbor entrance, waves around 5 ft. Showers likely.
Wed..W winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft, except up to 5 ft at the outer harbor entrance. Showers likely in the morning.
Wed night..W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft.
Thu..SW winds 5 to 10 kt. Waves around 2 ft.
Thu night..SW winds around 10 kt. Waves around 2 ft in the evening, then 1 foot or less.
Fri..SW winds around 10 kt. Waves 1 foot or less.
Fri night..W winds around 10 kt. Waves around 2 ft. A chance of showers. 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 Mon Oct 21 2019
Synopsis for massachusetts and rhode island coastal waters.. The remnants of nestor track south of the bench mark by Monday morning. High pressure builds southward into new england Monday. A cold front will pass through Tuesday night into Wednesday, bringing southerly winds which will switch to the west along with a chance of rain. High pressure and dry weather follow for the rest of the week. 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 Winthrop Town, MA
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location: 42.37, -70.98     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 210606
afdbox
area forecast discussion
national weather service boston norton ma
206 am edt Mon oct 21 2019

Synopsis
Low pressure well south of new england and its rain shield will
impact ri and southeast ma early this morning. As the low
continues to move seaward rain will exit and clouds will give
way to increasing sunshine later this morning into the
afternoon. However some cloudiness may linger over CAPE cod and
the islands. Dry weather tonight lingers into Tuesday morning
but then drizzle develops Tue afternoon with widespread showers
tue night ahead of an approaching cold front. Behind the front
dry and seasonably mild conditions follow Wednesday afternoon
into Friday although a cold front may bring a few showers Friday
afternoon and night. High pressure builds in for next weekend.

Near term until 6 am this morning
2 am update...

northern edge of rain shield associated with offshore low is
moving across coastal ct into ri and across southeast ma at 2
am. Back edge of cloud shield is over western ma ct and moving
steadily eastward. Where skies have cleared over eastern ny into
berkshire county ma, light winds and dew pts in the 40s has
resulted in patchy dense fog. Thus as the cloud shield advances
east and skies clear across western ma ct expected areas of fog
to develop in this region which includes the hartford area and
the city of springfield. This may have some impact on the
morning commute.

Farther east into ri and eastern ma clouds should linger long
enough to preclude fog from developing.

Short term 6 am this morning through 6 pm Tuesday
2 pm update...

Monday into Monday night...

nestor remnants not going far. N-plains cyclone occludes, tightens
towards 990 mb, the mid-upper level ridge downstream builds across
the NE CONUS pushing the mid-latitude flow northward resulting in a
wobbling, cut-off nestor lingering S E of the 40n 70w benchmark. An
e-fetch drawn from the wrapping tropical low-level moisture round
nestor back towards the approaching midweek occluded front, riding
beneath a dry-inversion settling down around h8-9. Moisture pooling,
saturating, while partial clearing is expected on Monday, going into
Monday night forecasting lowering conditions with nocturnal cooling,
brought inland by a stout E low-level jet, upsloping, can't rule out
some drizzle as well for E se-coastal ma. So dry and seasonable for
Monday with highs getting into the low 60s for most of new england
but E se-coastal ma with onshore flow and lingering clouds. Then
overnight it turns dreary with lows in the 40s.

Long term Tuesday night through Sunday
Highlights...

* low clouds Tue with light rain or patchy drizzle at times
* period of showers Tue night into early Wed then improving
conditions
* dry and mild weather Thu fri
* continued mainly dry and cooler for next weekend
Tuesday into Wednesday...

easterly flow Tue with considerable low level moisture
developing will result in low clouds overspreading much of the
region. Models generating light QPF moving in from the east.

This is likely a signal for some light rain or patchy drizzle
developing within moist easterly flow beneath dry air through
the mid levels. Then approaching shortwave and attending cold
front moves into the region Tue night. Deep moisture plume and
low level convergence will result in a period of showers moving
west to east across sne. The low level jet is somewhat fractured
and not particularly strong so not expecting an organized area
of heavy rainfall. But some locally heavier rain is possible tue
night as a wave develops on the front which enhances low level
convergence. However, better chance likely across maine on wed
north of the developing surface wave where decent E SE low level
jet develops. Much of the shower activity should be east of new
eng by Wed morning, but can't rule out a few lingering showers
into Wed morning, mainly across eastern ma. Otherwise, expect
increasing sunshine Wed as good mid level drying moves in with
mild temps well into the 60s.

Thursday through Sunday...

high pres moves off the mid atlc coast Thu with return flow
developing. Sunshine and seasonable temps for thu. Models differ on
the pattern for the end of the week into the weekend. ECMWF showing
a split flow pattern with dominant northern stream into the weekend
with southern stream low pres approaching late in the weekend. Gfs
has more of phased system with rain impacting sne on sat. Leaning
toward ECMWF solution which has support of other global guidance
including UKMET ggem. This supports a frontal passage late Fri fri
night which may be accompanied by some showers then high pres
building in for the weekend with dry and cooler conditions. Will
have to watch possible southern stream system approaching late in
the weekend. If timing speeds up then some rain may begin to impact
the region sometime Sunday, but going with a dry forecast for now.

Aviation 06z 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 ...

06z update...

thru 12z... High confidence on trends, lower on exact
timing details
vfr for most of the region with light rain over ri
and southeast ma continuing to move east and should exit cape
cod and the islands by 09z-12z. MVFR conditions will impact the
south coast of ma ri including CAPE cod and the islands. Other
area of concern is western ma ct when skies clear patchy dense
ground fog is possible including bdl baf. Light winds.

After 12z... High confidence.

MVFR CIGS may linger over CAPE cod and islands into the
afternoon. Otherwise any patchy ifr MVFR dense fog western ma ct
lifts toVFR quickly.VFR elsewhere as well. Light NE winds, bit
higher CAPE cod and islands.

Tonight... Moderate confidence, some uncertainty regarding areal
coverage of MVFR late.

Vfr to start and dry. However MVFR CIGS may come onshore late
and overspread much of the region.

Tuesday... High confidence on trends, lower on exact
timing details
vfr MVFR then trending ifr MVFR in areas of low clouds and
drizzle in the afternoon and especially toward evening.

Kbos terminal...

high confidence in TAF trends.

Kbdl terminal...

high confidence in TAF trends.

Outlook Tuesday night through Friday ... Moderate confidence.

Tuesday night: mainly MVFR, with areas ifr possible. Shra
likely.

Wednesday: mainlyVFR, with local MVFR possible. Breezy.

Wednesday night:VFR. Breezy.

Thursday through Thursday night:VFR.

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

2 pm update...

nestor remnants sweep N E near and SE of the 40n 70w benchmark
overnight, stalling and wobbling Monday into Monday night. With
high pressure settled N across new england into the SE canadian
maritimes, the neighboring airmasses yield a stout E NE gradient
wind into S new england. Generally 10 to 15 kts with gusts up as
high as 30 kts Monday morning. Seas potentially building 6 to 8
feet over the S SE waters. Small craft headlines posted for those
outer waters up against the s-coast, CAPE cod and islands.

Rain overnight tonight, lower visibility with rain especially on
the s-waters. Partial clearing Monday, but lower conditions return
Monday night along with forecast drizzle.

Outlook Tuesday night through Friday ... Moderate confidence.

Tuesday: winds less than 25 kt. Areas of rough seas. Chance of
rain, chance of drizzle.

Tuesday night: winds less than 25 kt. Areas of rough seas. Rain
showers likely.

Wednesday: low risk for small craft advisory winds with gusts
up to 30 kt. Seas up to 5 ft. Chance of rain showers.

Wednesday night through Thursday: winds less than 25 kt. Seas
up to 5 ft.

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

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

Slight chance of rain showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 6 am this morning to 8 pm edt this
evening for anz232>234.

Small craft advisory until 6 am edt Tuesday for anz235-237.

Small craft advisory from 2 pm this afternoon to 6 am edt
Tuesday for anz250.

Small craft advisory until 6 am edt Tuesday for anz254-255.

Small craft advisory until 6 am edt Tuesday for anz256.

Synopsis... Kjc sipprell
near term... Nocera
short term... Sipprell
long term... Kjc
aviation... Kjc nocera
marine... Kjc sipprell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 4 mi57 min 55°F 55°F1016.3 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi79 min ENE 5.8 G 7.8 56°F 57°F1 ft1016.8 hPa (+0.0)49°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 24 mi125 min ESE 5.8 G 7.8 56°F 56°F1 ft1017.5 hPa
FOXR1 - 8454000 - Providence, RI 45 mi51 min ENE 8 G 9.9 54°F 58°F1016.8 hPa
IOSN3 - Isle of Shoals, NH 45 mi69 min SE 8 G 8 55°F 1017.5 hPa (-0.7)51°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 46 mi79 min ENE 7.8 G 9.7 54°F 1 ft1017.1 hPa (-0.5)48°F
PVDR1 46 mi51 min NNE 6 G 8.9 54°F 1017 hPa49°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 47 mi51 min NE 11 G 12 54°F 1016.2 hPa
FRVM3 - 8447386 - Fall River, MA 47 mi57 min 53°F 58°F1016.6 hPa
BGXN3 - Great Bay Reserve, NH 48 mi84 min Calm 49°F 1018 hPa49°F
FRXM3 48 mi57 min 53°F 50°F
CPTR1 - 8452944 - Conimicut Light, RI 49 mi51 min NNE 9.9 G 13 53°F 58°F1016.3 hPa

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA3 mi75 minENE 410.00 miOvercast56°F46°F72%1017.4 hPa
Beverly, Beverly Municipal Airport, MA15 mi76 minNNE 310.00 miOvercast52°F48°F89%1016.9 hPa
Norwood, Norwood Memorial Airport, MA16 mi76 minN 010.00 miOvercast55°F50°F83%1017.1 hPa
Laurence G Hanscom Field Airport, MA18 mi78 minN 010.00 miOvercast54°F48°F83%1018.2 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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Last 24hrCalmW5N4N5NW3N5CalmCalmNE3SE3E5E6E6E7E5E6E7NE4E7SE7CalmCalmE4E4
1 day agoW7W8NW8W8W8W9NW11NW11
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2 days agoW18
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Tide / Current Tables for Belle Isle Inlet entrance, Boston Harbor, Massachusetts
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Belle Isle Inlet entrance
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Mon -- 05:36 AM EDT     8.82 feet High Tide
Mon -- 07:03 AM EDT     Sunrise
Mon -- 08:41 AM EDT     Last Quarter
Mon -- 11:35 AM EDT     1.56 feet Low Tide
Mon -- 02:23 PM EDT     Moonset
Mon -- 05:48 PM EDT     9.90 feet High Tide
Mon -- 05:52 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.92.34.25.97.58.68.77.86.24.52.91.81.72.94.76.68.39.59.99.17.45.43.31.6

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Mon -- 01:12 AM EDT     1.12 knots Max Flood
Mon -- 04:47 AM EDT     -0.00 knots Slack
Mon -- 07:03 AM EDT     Sunrise
Mon -- 07:43 AM EDT     -0.88 knots Max Ebb
Mon -- 08:41 AM EDT     Last Quarter
Mon -- 11:31 AM EDT     0.00 knots Slack
Mon -- 01:35 PM EDT     1.15 knots Max Flood
Mon -- 02:22 PM EDT     Moonset
Mon -- 05:09 PM EDT     -0.00 knots Slack
Mon -- 05:52 PM EDT     Sunset
Mon -- 08:22 PM EDT     -1.03 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.71.110.80.5-0.1-0.6-0.8-0.9-0.8-0.7-0.40.41.11.10.90.70.1-0.5-0.9-1-1-0.9-0.7

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.
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Wind Forecast for Boston, MA (3,6,7,8)
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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.