Tuesday, June25, 2019 L-36.com


Marine Weather and Tides
Winthrop Town, MA

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Sunrise 5:06AMSunset 8:26PM Tuesday June 25, 2019 10:13 PM EDT (02:13 UTC) Moonrise 1:00AMMoonset 12:57PM Illumination 39% Phase: Third Quarter Moon; Moon at 23 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- 931 Pm Edt Tue Jun 25 2019
Overnight..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers late this evening. Patchy fog with vsby 1 to 3 nm.
Wed..N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less.
Wed night..E winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. Vsby 1 to 3 nm.
Thu..N winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less. Patchy fog. Vsby 1 nm or less.
Thu night..S winds around 5 kt, becoming W after midnight. Waves 1 foot or less. Patchy fog. Vsby 1 to 3 nm.
Fri..NW winds around 5 kt, becoming sw in the afternoon. Waves 1 foot or less.
Fri night..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Sat..SW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms.
Sat night..W winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms.
Sun..W winds 5 to 10 kt. Waves 1 foot or less. Showers and tstms likely.
Sun night..NW winds 5 to 10 kt. Waves around 2 ft. A chance of showers and tstms. Winds and waves higher in and near tstms. 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 931 Pm Edt Tue Jun 25 2019
Synopsis for massachusetts and rhode island coastal waters.. Low pres will move east of the waters Wed as weak high pres builds in from the west and persists into Fri. A cold front will drop south across S new eng and the waters late Sat night into Sun. Low pressure moves east of the waters Sunday night with high pressure cresting over the northeast on Tuesday. 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 260141
afdbox
area forecast discussion
national weather service boston norton ma
941 pm edt Tue jun 25 2019

Synopsis
A frontal boundary will bring a period of showers early in the
night, followed a drying trend later tonight. Summer like
warmth is expected Wednesday through Friday with a few showers
and thunderstorms at times, but should be mainly dry. A cold
front sweeps south through southern new england Saturday
bringing another chance of showers and thunderstorms. Cooler
weather then moves in Sunday, followed by warming Tuesday.

Near term until 6 am Wednesday morning
940 pm update...

last of the showers moving through east coastal ma and
cape islands this evening. Pwat axis across the CAPE and will
be moving east overnight with drying in the column. The showers
will gradually exit the CAPE and ack around or just after
midnight. Meanwhile isolated showers and embedded thunder have
developed in western ma and far western ct. Environment is
somewhat unstable in western new eng with capes 500-1000 j kg so
can't rule out an isolated shower t-storm through midnight,
otherwise mainly dry overnight. Weak front will move east across
sne with wind shift to light N NW but not enough to bring drier
air to low levels near the coast and eastern new eng where low
level moisture will persist. As a result, low clouds will hang
tough in eastern half new eng with partial clearing developing
in the ct valley
other concern overnight is the potential for patchy dense fog
near the south coast where heaviest rainfall was observed.

Patchy fog possible inland as well just thinking more widespread
along near the coast. Given moist airmass temps only bottom out
60-65 for overnight mins.

Short term 6 am Wednesday morning through Wednesday night
Wednesday ...

low pres SE of new eng will gradually pull away, but the northerly
flow along the coast and lingering low level moisutre may keep areas
of lower clouds persisting through the morning across eastern ma.

Thereafter subtle height rises over the region should provide some
subsidence and column drying as evident by pwats falling to about an
inch along with k indices really dropping off. Thus partly to mostly
sunny conditions and warm with mixing to 850 mb and temps at this
level around +14c, supporting highs in the mid to upper 80s. It will
feel warm with dew pts in the 60s. Afternoon seabreezes will take
the edge off the heat along and near the coast.

Late in the day short wave trough moves across northern ny state.

Convection from this feature may hold together and spill into
western ma ct late in the day before dissipating per 12z cams.

Wednesday night ...

other than possible early evening convection weakening across
western ma ct, column begins to dry supporting quiet weather
overnight. Remaining warm and humid with dew pts in the 60s. Patchy
fog possible as well.

Long term Thursday through Tuesday
Big picture...

zonal flow over the northeast usa through Friday. Broad upper ridge
over the southern usa builds north through the plains late in the
week, then shifts east early next week. Large closed low lingers
over the pacific coast through Friday, then ejects northeast into
canada over the weekend. This ejecting low kicks another low away
from hudsons bay. The hudsons bay upper low sweeps southeast to new
england by Sunday and to our east Monday. The remnants of the
pacific upper low moving southeast out of ontario Tuesday.

Contour heights from 500 mb will be above normal through Saturday.

Heights then lower to the low side of normal Sunday-Monday as the
hudsons bay upper low sweeps across new england. Heights return to
seasonable levels Tuesday-Wednesday. Expect above normal
temperatures Thursday to Saturday, cooler Sunday-Monday, then
warming again Tuesday-Wednesday.

Forecast confidence is moderate-high. The various model mass fields
are similar through Sunday morning. They agree on the general
pattern after that through Wednesday, but with differences in
handling the departing upper low Sunday and the following shortwave
over ontario Tuesday.

Concerns...

Thursday-Friday...

two shortwaves move through the flow during this period. The gfs
brings them through Thursday night and Friday night while the ecmwf
shows just one passage on Thursday night. Moisture is limited to the
700-850 mb layer with plenty of dry air above. This would suggest
shallow clouds. The supporting upper jets with the shortwaves mostly
aim their favorable dynamics north of the mass border, directing
most cloud development there. Pw values top out 1.0 to 1.25 inches
Thursday, drop back, then resurge to 1.5 inches Friday night.

Expect mainly dry weather Thursday, but with diurnal clouds
developing, either cumulus or alto-cu. Sbcapes are forecast around
500 mb along the nh border. Total-totals show a similar favoring of
vt nh. Scattered or widely scattered afternoon showers should form,
with placement favoring northern mass. Could be isolated thunder as
well. Mixing will reach between 800-850 mb, which will tap equiv 850
temps of 14-16c. This supports MAX sfc temps in the 80s.

Friday should be dry during the day, but expect scattered showers
with the Friday night shortwave. Most of these should develop in
upstate ny in the afternoon and move into our area Friday evening or
Friday night. The SREF shows a 50 pct chance of CAPE over 1000 in ct
and western ma Friday evening, so we will mention some thunder as
well. Temps aloft support 80s again, possibly around 90 in some
spots.

Saturday...

upper low from hudsons bay drives southeast, aided by a 100-kt upper
jet. This drives a cold front southeast across new england Saturday
afternoon and night. The cold front provides a source of low-level
convergence, the upper jet provides dynamic support, and daytime
heating generates instability. CAPE of 1000-1500 j kg and totals
near 50 are forecast. So we expect showers thunder to develop.

Mixing is not expected to go as deep as previous days, but should
still reach 850 mb, where temps will be around 15c. So MAX temps
will again be well into the 80s.

Sunday...

surface cold front moves south of new england, while the upper
low cold pool cold pool moisture move south across southern new
england Sunday. With the colder air moving in aloft, expect to
around 850 mb and possibly near 800 mb. The cold pool moisture
should be enough to generate clouds, and stability parameters
support showers and scattered thunder. Temperatures at 850 mb will
be 10-11c, supporting MAX sfc temps 75 to 80.

Monday-Tuesday...

the upper low pulls east Monday, taking much of the cloud cover and
showers. Another cold front may dive out of canada Tuesday night,
bringing another chance of showers.

Aviation 02z Wednesday 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 ... Moderate confidence.

Tonight... High confidence on trends, lower on exact details.

Any heavy showers will diminish as they move east. This will
leave an area of low ceilings over eastern mass and ri, while
northern ct western ma will have slow lifting clearing. The
lingering humidity will lead to lowering vsbys in fog. This will
be especially true along the south coast where heavier rain took
place during the day... Areas of dense fog may form in those
areas.

Wednesday ... High confidence.

Patchy MVFR ifr CIGS vsbys in the morning across portions of
east coastal ma, otherwiseVFR. Chance of a late day
shower t-storm across western ma ct.

Wednesday night ...

scattered showers and t-storms over eastern ny at 00z may hold
together and enter western-central portions of ma ct but slowly
weaken as well.

Kbos terminal... Heavy showers and embedded thunder over
southeast ct at 18z may stay mainly south of logan but will be a
close call through 21z 22z
kbdl terminal... High confidence in trends. Lower confidence in
specific details and timing.

Outlook Thursday through Sunday ... Moderate confidence.

Thursday through Friday:VFR.

Friday night: mainlyVFR, with areas MVFR possible. Chance
shra, isolated tsra.

Saturday: mainlyVFR, with areas MVFR possible. Chance shra,
chance tsra.

Saturday night: mainlyVFR, with local ifr possible. Chance
shra, slight chance tsra.

Sunday: mainly MVFR, with areasVFR possible. Breezy. Chance
shra, chance tsra.

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.

Tonight ... S-se winds becoming light north toward morning.

Vsby reduced in scattered showers and areas of dense fog.

Wednesday ... Light and variable winds with weak low pressure
meandering east of nantucket. Areas of morning fog may reduce vsby
but improving trend for the afternoon.

Wednesday night ... Weak low east of nantucket exits east with light
and variable winds over the waters of ma ri.

Outlook Thursday through Sunday ... Moderate confidence.

Thursday through Thursday night: winds less than 25 kt. Local
visibility 1 to 3 nm. Seas less than 5 ft.

Friday: winds less than 25 kt. Seas less than 5 ft.

Friday night: winds less than 25 kt. Seas less than 5 ft. Slight
chance of rain showers.

Saturday: winds less than 25 kt. Seas less than 5 ft. Slight
chance of rain showers, slight chance of thunderstorms.

Saturday night: winds less than 25 kt. Seas less than 5 ft. Chance
of rain showers, slight chance of thunderstorms.

Sunday: winds less than 25 kt. Seas locally approaching 5 ft.

Chance of rain showers, chance of thunderstorms.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Wtb nocera
near term... Kjc
short term... Nocera
long term... Wtb
aviation... Wtb nocera
marine... Wtb nocera


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 4 mi61 min 69°F 1012.1 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi83 min SE 9.7 G 9.7 63°F 60°F2 ft1011.8 hPa (+0.7)63°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 24 mi69 min SSE 12 G 14 62°F 58°F3 ft1012.4 hPa
FOXR1 - 8454000 - Providence, RI 45 mi55 min S 13 G 17 67°F 67°F1011.8 hPa
IOSN3 - Isle of Shoals, NH 45 mi73 min SSE 19 G 20 62°F 1011.9 hPa (+0.9)62°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 46 mi83 min S 12 G 12 62°F 1 ft1013.1 hPa (+0.5)62°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 47 mi55 min SSW 5.1 G 6 69°F 1012.8 hPa
FRVM3 - 8447386 - Fall River, MA 47 mi61 min 68°F 74°F1013.2 hPa
BGXN3 - Great Bay Reserve, NH 48 mi88 min E 1.9 66°F 1013 hPa65°F
FRXM3 48 mi61 min 68°F 67°F
CPTR1 - 8452944 - Conimicut Light, RI 49 mi55 min SSE 19 G 21 66°F 67°F1012 hPa

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA3 mi19 minS 66.00 miLight Rain Fog/Mist70°F66°F87%1012.4 hPa
East Milton, MA13 mi77 minS 15 G 23 mi66°F66°F100%1012.8 hPa
Beverly, Beverly Municipal Airport, MA15 mi20 minS 46.00 miLight Rain Fog/Mist68°F64°F90%1012 hPa
Norwood, Norwood Memorial Airport, MA16 mi20 minS 710.00 miOvercast71°F66°F84%1012.3 hPa
Laurence G Hanscom Field Airport, MA18 mi17 minSSW 48.00 miOvercast70°F66°F87%1013.4 hPa

Wind History from BOS (wind in knots)
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Last 24hrE5SE5E5--SE3S3S4CalmNE3E4E5E7E5--E3E3S12S9S7S9S11S14S10S6
1 day agoW12W10W8W9W9NW8NW10W8NW10NW7NW73E8E11E9E12E10E15E14E11E12E8E9E7
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Tide / Current Tables for Belle Isle Inlet entrance, Boston Harbor, Massachusetts
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Belle Isle Inlet entrance
Click for Map
Tue -- 12:59 AM EDT     Moonrise
Tue -- 05:08 AM EDT     Sunrise
Tue -- 05:48 AM EDT     Last Quarter
Tue -- 06:00 AM EDT     8.99 feet High Tide
Tue -- 12:12 PM EDT     1.24 feet Low Tide
Tue -- 12:56 PM EDT     Moonset
Tue -- 06:35 PM EDT     8.98 feet High Tide
Tue -- 08:24 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.645.57.18.598.57.25.53.72.11.31.62.84.367.78.88.986.653.3

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Tue -- 12:59 AM EDT     Moonrise
Tue -- 01:47 AM EDT     0.92 knots Max Flood
Tue -- 05:08 AM EDT     Sunrise
Tue -- 05:18 AM EDT     -0.00 knots Slack
Tue -- 05:48 AM EDT     Last Quarter
Tue -- 09:58 AM EDT     -0.95 knots Max Ebb
Tue -- 12:03 PM EDT     0.00 knots Slack
Tue -- 12:56 PM EDT     Moonset
Tue -- 02:15 PM EDT     0.99 knots Max Flood
Tue -- 05:50 PM EDT     -0.00 knots Slack
Tue -- 08:24 PM EDT     Sunset
Tue -- 10:29 PM EDT     -0.96 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.80.90.90.70.2-0.3-0.6-0.8-0.9-0.9-0.8-0.10.7110.90.5-0.1-0.5-0.7-0.9-0.9-0.9

Weather Map and Satellite Images
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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 (22,6,7,8)
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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.