Wednesday, June20, 2018 L-36.com


Marine Weather and Tides
Winthrop Town, MA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:05AMSunset 8:25PM Wednesday June 20, 2018 3:03 PM EDT (19:03 UTC) Moonrise 12:54PMMoonset 1:00AM Illumination 49% 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 Pm Edt Wed Jun 20 2018
This afternoon..S winds 5 to 10 kt. Waves 1 foot or less.
Tonight..SW winds 5 to 10 kt. Waves 1 foot or less.
Thu..NW winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less.
Thu night..NE winds 5 to 10 kt. Waves 1 foot or less.
Fri..E winds around 5 kt. Waves 1 foot or less.
Fri night..S winds around 5 kt. Waves 1 foot or less. A chance of showers.
Sat..SE winds around 5 kt. Waves 1 foot or less. Showers likely.
Sat night..S winds around 5 kt. Waves 1 foot or less. Showers likely.
Sun..SW winds 5 to 10 kt. Waves 1 foot or less.
Sun night..NW winds 5 to 10 kt. Waves 1 foot or less. 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 Pm Edt Wed Jun 20 2018
Synopsis for massachusetts and rhode island coastal waters.. High pres builds across the waters early today then will shift e. Low pres will pass S of long island late tonight, bringing showers and patchy fog from cape cod southward through early Thu. High pres returns with dry conditions Thu and Fri. Low pres and an associated warm front will approach late Fri night, bringing showers Sat into Sat night. Showers may linger as a cold front approaches Sun. 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 201752
afdbox
area forecast discussion
national weather service boston norton ma
152 pm edt Wed jun 20 2018

Synopsis
Dry weather is expected today as high pressure builds across
new england. Showers are likely tonight south of the mass pike
as low pressure passes south of new england. High pressure from
canada brings dry weather Thursday and Friday. A cold front
them brings a chance of showers at times this weekend, followed
by dry weather early next week.

Near term until 6 pm this evening
200 pm update...

trends in the forecast remains on track for today. Generally
zonal flow aloft as a southern wave pushes through the flow.

This wave will spin up a low pressure system over the great
lakes and track towards the region tonight. Surface high
pressure is beginning to move offshore. This has allowed for the
sea breeze to wash out and temperatures along the eastern
coastline to begin to warm into the 80s.

One thing to watch is the approaching cold front well to the
north of the area. This front will determine where the low will
travel along. Latest runs in the guidance continues to push the
precip shield farther north than prev runs. This would suggest
that the front has slowed up a bit. Models have not accurately
predict the ongoing precip across upstate ny. Thus may
introduce some sprinkles or light showers late this afternoon or
early evening. Not expecting anything heavy as temp dewpoint
spread is still large with still some dry air introduced in the
profile per bufkit soundings.

Short term 6 pm this evening through 6 pm Thursday
Tonight...

00z model suite remains in pretty good agreement with the
approach of low pressure out of middle appalachians. Noted that
the models are trending a bit further S with the low pres as the
h5 long wave trough across the NE u.S. Into labrador and
newfoundland tends to flatten at its base S of new england.

The low moves off the nj coast around 09z or so with a rather
sharp northern extent of the precip shield. Looks like the best
chance for showers will occur across N ct ri into S coastal mass
where likely pops are in the forecast. The higher QPF amounts
area also suppressed to the s, so expect maybe 0.1 to 0.2
inches, possibly a bit higher on the islands. Looks like
conditions should remain mainly dry, but can't rule out a few
brief showers possibly as far N as the mass pike.

Thursday...

leftover showers along S coastal areas should push offshore by
midday, though there is some timing issues amongst the model
suite during this timeframe. Leaned toward the somewhat faster
gfs ggem timing. Skies should become mostly clear during the
afternoon, though a few clouds may linger across CAPE cod and
the islands.

It will be a cooler day on Thursday along the mass E coast as
winds become e-ne by around midday or early afternoon. Temps
there will only top off in the mid 60s to lower 70s, coolest on
the outer CAPE and nantucket, ranging to the lower 80s across
the ct valley.

Long term Thursday night through Tuesday
Highlights...

* dry and seasonable on Friday
* unsettled weather for this weekend
* dry weather early next week
overview...

20 00z guidance continues to show improved agreement in the mid
level pattern from earlier cycles. This agreement still breaks
down in some of the finer details Saturday night into Sunday,
but not to the point where confidence is lost in the overall
trends.

High pressure should move offshore, opening the door for a low
pressure to move through the great lakes into the saint lawrence
valley. This trajectory will force both the warm and cold fronts
of this system across southern new england sometime this
weekend. At this time, expecting an increasing risk for showers
late Friday night into Saturday, peaking about Saturday evening,
then diminishing into Sunday. A secondary cold front should
cause showers to linger later Sunday. This weekend still doesn't
look like a washout. Another high pressure should return with
dry weather early next week.

Not seeing any major deviations from normal temperatures for
this period. Perhaps a bit cooler than normal Saturday,
depending upon timing of a warm front and amount of sunshine.

Aviation 18z Wednesday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday ... High confidence.

Before 00z...VFR. Sea breeze is beginning to washout this
afternoon. Southwesterly winds will pick up with gusts between
15-20 kts. A sprinkle across the western terminals is possible.

Tonight... MainlyVFR. MVFR across the south coast in showers and
fog. Southwest winds will flip to a more northwest by morning.

Thursday...VFR. Lingering showers along the south coast between
12-15z. MVFR CIGS improve toVFR during the day but around 4-7
kft. A spot showers across the interior is possible as winds are
out of the east.

Thursday night...VFR to start but with northeast flow believe
low levels will saturate dropping CIGS and vsbys to MVFR
conditions.

Kbos terminal... High confidence in taf. Ongoing sea breeze looks
to washout between 16-19z.

Kbdl terminal... High confidence in taf.

Outlook Thursday night through Sunday ... Moderate confidence.

Friday:VFR.

Friday night:VFR. Slight chance shra.

Saturday: mainlyVFR, with areas MVFR possible. Shra likely.

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

Sunday: mainlyVFR, with local MVFR possible. Chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday ... High confidence.

Today and tonight... Light W winds early today shift to sw, up
to 15-20 kt on the eastern waters late today. May see gusts up
to 25 kt late this afternoon into this evening on the eastern
outer waters, where seas may briefly build up to 4 ft. Small
craft advisory has been issued. Winds may gust up to 20 kt on
the lower end of narragansett bay into buzzards bay with locally
choppy seas this afternoon. Reduced visibility in showers and
patchy fog tonight mainly across the south coastal waters.

Thursday... N-nw winds early Thu will shift to e-ne by midday
thu with gusts up to 20 kt possible. Leftover reduced visibility
along S coastal waters through midday thu, then improving.

Outlook Thursday night through Sunday ... Moderate confidence.

Thursday night through Friday: winds less than 25 kt.

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

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

Rain showers likely.

Saturday night: winds less than 25 kt. Local rough seas. Rain
showers likely, with isolated thunderstorms.

Sunday: winds less than 25 kt. Areas of rough seas. Slight
chance of rain showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk evt
near term... Dunten
short term... Evt
long term... Belk
aviation... Belk dunten
marine... Belk evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 4 mi46 min 79°F 1008 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi74 min ESE 9.7 G 12 65°F 65°F1 ft1009 hPa (-2.6)59°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 24 mi120 min 62°F 63°F1 ft1008.9 hPa
FOXR1 - 8454000 - Providence, RI 45 mi46 min S 11 G 17 74°F 65°F1009.3 hPa
IOSN3 - Isle of Shoals, NH 45 mi64 min SSE 18 G 19 65°F 1008.4 hPa (-2.5)52°F
PVDR1 46 mi46 min SSE 14 G 16 72°F 1009.9 hPa66°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 46 mi74 min SSW 14 G 16 67°F 2 ft1010 hPa (-2.3)57°F
FRVM3 - 8447386 - Fall River, MA 47 mi46 min 78°F 67°F1010.5 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 47 mi46 min SSW 9.9 G 13 74°F 1009.9 hPa
FRXM3 48 mi46 min 76°F 62°F
BGXN3 - Great Bay Reserve, NH 48 mi79 min WSW 5.1 80°F 57°F
CPTR1 - 8452944 - Conimicut Light, RI 49 mi46 min S 14 G 16 71°F 70°F1009.6 hPa

Wind History for Providence, RI
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N10
G16
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G21
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NE8
G11
N7
G10
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NE2
G5
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SW16
G24
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W6
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G7
NE7
G12
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G18
NE13
G23
NE8
G15
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NE14
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S14
G17
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S7
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G11
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G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA3 mi70 minW 11 G 2210.00 miMostly Cloudy83°F48°F31%1009 hPa
East Milton, MA13 mi68 minW 12 G 18 mi79°F51°F38%1010.4 hPa
Beverly, Beverly Municipal Airport, MA15 mi71 minESE 610.00 miFair77°F55°F48%1008.3 hPa
Norwood, Norwood Memorial Airport, MA16 mi71 minWSW 910.00 miFair83°F53°F36%1009.3 hPa
Bedford, Hanscom Field, MA18 mi68 minSW 13 G 1710.00 miMostly Cloudy82°F52°F35%1010.1 hPa

Wind History from BOS (wind in knots)
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Last 24hrNW15
G19
N9
G23
NW12
G21
NW12N8N8N7N9N9NW6NW6NW5W5NW6W5NW3NW44SE5SE4SE6SE7W11
G22
SW11
1 day agoS18
G23
SW20
G27
SW15
G28
SW18
G28
SW7--SW14
G22
SW16SW16SW14SW14
G21
SW10SW14W11NW9
G17
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G21
N18
G24
NW11NW11
G21
NW11
G21
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NW15
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2 days agoE9E9E11E8E53S4S8S8SW10SW11SW9SW9SW11SW13SW15SW14SW13SW13
G18
SW14SW20
G24
SW18SW15S13

Tide / Current Tables for Belle Isle Inlet entrance, Boston Harbor, Massachusetts
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Belle Isle Inlet entrance
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Wed -- 12:59 AM EDT     Moonset
Wed -- 05:06 AM EDT     Sunrise
Wed -- 05:37 AM EDT     10.50 feet High Tide
Wed -- 06:52 AM EDT     First Quarter
Wed -- 11:51 AM EDT     -0.30 feet Low Tide
Wed -- 12:54 PM EDT     Moonrise
Wed -- 06:19 PM EDT     10.21 feet High Tide
Wed -- 08:24 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.72.24.26.58.810.210.49.37.452.40.3-0.30.62.34.579.110.19.98.76.74.32

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Wed -- 12:59 AM EDT     Moonset
Wed -- 02:20 AM EDT     1.04 knots Max Flood
Wed -- 04:51 AM EDT     -0.00 knots Slack
Wed -- 05:06 AM EDT     Sunrise
Wed -- 06:52 AM EDT     First Quarter
Wed -- 09:28 AM EDT     -1.15 knots Max Ebb
Wed -- 11:32 AM EDT     0.00 knots Slack
Wed -- 12:54 PM EDT     Moonrise
Wed -- 02:56 PM EDT     1.08 knots Max Flood
Wed -- 05:33 PM EDT     -0.00 knots Slack
Wed -- 08:23 PM EDT     Sunset
Wed -- 10:02 PM EDT     -1.14 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71110.5-0.1-0.5-0.8-1-1.1-1.1-0.50.40.911.10.80.3-0.2-0.5-0.8-1-1.1-0.9

Weather Map and Satellite Images
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wmap_A
GOES 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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (15,3,4,5)
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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.