Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Dover, MA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:38AMSunset 7:45PM Sunday April 30, 2017 10:41 AM EDT (14:41 UTC) Moonrise 9:27AMMoonset 12:00AM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 1015 Am Edt Sun Apr 30 2017
This afternoon..E winds around 10 kt. Waves 1 foot or less. A slight chance of showers.
Tonight..SE winds around 5 kt. Waves 1 foot or less. A chance of showers with areas of drizzle.
Mon..SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers with areas of drizzle. Vsby 1 to 3 nm.
Mon night..S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. Patchy fog. Showers likely with a chance of tstms. Vsby 1 to 3 nm.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 ft. Patchy fog. Vsby 1 to 3 nm.
Tue night..W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves around 2 ft.
Wed..W winds 5 to 10 kt with gusts up to 20 kt. Waves 1 foot or less.
Wed night..NW winds 5 to 10 kt. Waves 1 foot or less.
Thu..SW winds around 5 kt. Waves 1 foot or less. A chance of rain.
Thu night..SE winds 5 to 10 kt. Waves 1 foot or less. Rain likely. 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 1015 Am Edt Sun Apr 30 2017
Synopsis for massachusetts and rhode island coastal waters.. High pressure will move from quebec to new england this afternoon then move off the coast tonight. A warm front will lift northward across much of the waters late Sunday night and Monday. A cold front will sweep across the waters Monday night into early Tuesday. High pressure slowly builds over the waters for Wednesday and Thursday. Low pressure moves up the coast and over the waters for Friday. 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 Dover, MA
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location: 42.27, -71.27     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 301408
afdbox
area forecast discussion
national weather service taunton ma
1008 am edt Sun apr 30 2017

Synopsis
Strong high pressure over southern quebec will build southeast
across new england today, bringing drier and much cooler air.

This high pressure moves off the coast this evening, and a warm
front moves north into our region Monday. A cold front will
move through Tuesday. Another storm moves toward southern new
england late Thursday or Friday, and could linger nearby into
Saturday.

Near term /until 6 pm this evening/
10 am update...

small area of convection lifting NE from central ny expected to
weaken as it moves into more stable environment. However, weak
theta-e advection may support a few sprinkles or light shower,
especially north of the pike. Otherwise, mainly dry conditions
with increasing clouds as area of low/mid level moisture moves
across new eng in developing warm advection pattern. Much cooler
today with low level easterly flow. Temps ranging from the
lower 50s across east coastal ma to lower 60s in the ct valley.

Temps will be around 30 degrees cooler than yesterday in east
coastal ma.

Short term /6 pm this evening through 6 pm Monday/
Tonight...

as high pressure moves offshore, a warm front will approach sne
from the south and west. SREF probabilities are near 100 percent
for low cloudiness to rapidly develop across the entire region.

Expect patchy fog along the south coast as higher dewpoint air
moves in over colder sea surface temperatures. Models are
generating some light QPF which is likely some drizzle given the
abundant low level moisture and dry air aloft. As the night
progresses, there could also be some scattered showers, as a
southwesterly low level jet of 40 kt develops, accompanied by an
increase in k indices... To near 30. Lows will be mainly in the
mid 40s.

The astronomical tide will be on the high side again... 11.45
feet at boston at 3:35 am, but little in the way of storm surge
is expected, with southeast winds less than 20 kt, so am not
expecting much in the way of splashover. Will keep an eye on
this possibility.

Monday...

the warm front will continue moving northeastward but may have
trouble making it all the way into the merrimack valley.

Have gone with a model blend of temperatures... Which are mainly
in the 60s but range from near 70 in the ct valley to the upper
50s in essex county, ma and over outer CAPE cod and the
islands. The day will start will start with low clouds, fog, and
areas of drizzle. The surge of higher k indices exits northern
ma by mid- morning, and the risk of any showers will end from
south to north along with it. Much drier air aloft moves in from
the south, actually, for a time, allowing for some breaks of
sunshine through mid-afternoon. Then, clouds will increase and
there is a chance of showers late in the afternoon, well in
advance of an approaching cold front.

Long term /Monday night through Saturday/
Overview...

still seeing variations in the model solutions for later this
week, although some details are starting to emerge with greater
confidence into Thursday morning. 30/00z operational gfs
continues to be out of step with the GEFS mean, as well as the
ecmwf and cmc. Favored a consensus approach through Wednesday,
then leaned a bit more toward a non-gfs solution Friday into
Saturday. Lower than average confidence in the Friday-Saturday
forecast.

Details...

Monday night-Tuesday... Moderate confidence.

Low pressure will push across the great lakes into ontario and
western quebec during this timeframe.

Strong SW low level jet will result in excellent moisture
transport, and help to organize modest instability ahead of a
cold front. Not expecting severe weather, since the primary time
period would be Monday night, but with 45-55 kt winds, cannot
completely dismiss the possibility.

Showers move out of our region Tuesday morning, but the cold
front will lag a bit longer. Gusty southwest winds should
continue through the day. Once the sunshine breaks out,
expecting another day of above normal temperatures.

Wednesday... Moderate confidence.

This is still looking like a mainly dry period. Cyclonic flow
aloft will mean a period of diurnal clouds, mostly toward NW ma.

Any isolated showers which might develop would be confined to
far western ma. Near normal temperatures.

Thursday-Friday... Moderate confidence.

Have greater confidence early Thursday morning will start out
dry. Lots of ingredients lining up for a period of wet weather,
the question which is harder to pin down is the timing. Have
increasing rainfall chances from SW to NE through the day
Thursday, leading into the more likely period of rainfall
Thursday night into Friday. Rainfall could be heavy at times.

Saturday... Low confidence.

This period remains complicated. GFS still has a very wet
solution, while the cmc, ecmwf, and GEFS suggest a closed 850 mb
low passes by to our west, which would force a dry slot into
southern new england during the. As previously mentioned,
favored the drier non-gfs solutions, but did not go with a
completely dry forecast. It will likely be another day or two
before this discrepancy start to get resolved.

Aviation /14z 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.

Today... High confidence.VFR. Low risk for a brief
shower/sprinkle north of the pike. Easterly winds 5-15 kt.

Tonight... Moderate confidence. Conditions deteriorating to
MVFR/ifr around midnight as stratus and patchy drizzle
develops. Areas of fog along the south coast.

Monday... Moderate confidence. MVFR-ifr CIGS through mid to
late morning in areas of drizzle and fog. Some improvement to
vfr mainly south of the mass pike from late morning through mid
afternoon. Becoming MVFR again with scattered showers late in
the afternoon, mainly in western sections, well out ahead of an
advancing cold front.

Kbos taf... High confidence in taf.

Kbdl taf... High confidence in taf.

Outlook /Monday night through Thursday/...

Monday night... High confidence.

Cigs lower to mainly MVFR across most of the region, with local
ifr in heavier shra. Scattered tstms. SW llws up to 45-55 kt at
2000 ft agl along the south coast, including the CAPE and
islands.

Tuesday... High confidence.

MVFR-ifr conditions linger early morning in leftover showers,
then improving toVFR through midday. Llws with SW winds
45-55 kt across south coastal areas possible through 16z,
highest across the islands.

Wednesday... High confidence.VFR.

Wednesday night-Thursday... Moderate confidence.

Vfr expected through the period, although CIGS lower during
Thursday. Increasing coverage of rain from SW to NE Thursday,
with MVFR vsbys in heavier rain during the afternoon. -ra and
patchy fog lingers with areas of MVFR cigs/vsbys into Thursday
night.

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.

Today into tonight... Nw-n winds may gust to near 20 kt early
this morning. Winds then become n/ne later this morning and veer
to the e/se by mid-late afternoon. Speeds will diminish to 15
kt or less. Winds become SE to S tonight. Seas below small craft
advisory thresholds. Vsbys lowering to below 3 miles in fog
developing after midnight over the southern coastal waters.

Monday... Moderate confidence.

Warm front moves across the waters Monday. SE winds ahead of the
front become s-sw behind the front, mainly over the southern
waters. Visibility restrictions in areas of drizzle and patchy
fog through early Monday afternoon. Seas could build to 5 ft
over the southern waters late in the afternoon. May need to
issue small craft advisories... But still a little too early.

Outlook /Monday night through Thursday/...

Monday night... Moderate confidence.

Increasing SW winds ahead of a cold front approaching the waters,
with gusts up to 30 kt. Rough seas building across the outer
coastal waters, too. Showers likely with scattered
thunderstorms. Visibility restrictions in precipitation. Small
craft advisories likely.

Tuesday... Moderate confidence.

Improving conditions as showers move out of the area during the
morning. Gusty SW winds up to 30 kt continue, before
diminishing Tuesday night. Rough seas linger across the outer
coastal waters. Small craft advisories likely for the southern
coastal waters.

Wednesday... Moderate confidence. Winds continue to diminish
through Wednesday night, but seas will take a while longer.

Thursday... Moderate confidence.

Winds expected to remain less than 20 kt, with seas less than
4 feet.

Box watches/warnings/advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk/gaf
near term... Kjc
short term... Gaf
long term... Belk
aviation... Belk/gaf
marine... Belk/gaf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 13 mi41 min 47°F 51°F1026 hPa (+1.3)
44013 - BOSTON 16 NM East of Boston, MA 33 mi111 min NNE 14 G 18 46°F 47°F3 ft1025.5 hPa (+3.9)
FOXR1 - 8454000 - Providence, RI 33 mi41 min E 1.9 G 6 56°F 51°F1024.4 hPa (+1.2)
PVDR1 34 mi41 min N 7 G 11 58°F 1024.7 hPa (+1.1)31°F
CPTR1 - 8452944 - Conimicut Light, RI 38 mi41 min NNE 9.9 G 15 56°F 52°F1025 hPa (+1.1)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi41 min NNE 8 G 8.9 58°F 1024.1 hPa (+1.2)
FRXM3 40 mi41 min 57°F 35°F
FRVM3 - 8447386 - Fall River, MA 40 mi41 min 56°F 51°F1025.4 hPa (+1.2)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 41 mi97 min NNE 14 G 16 46°F 47°F3 ft1026 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 44 mi41 min NE 7 G 8 57°F 1024.9 hPa (+1.3)
NAXR1 - Narragansett Bay Reserve, RI 44 mi56 min NE 8.9 60°F 1025 hPa40°F
QPTR1 - 8454049 - Quonset Point, RI 48 mi41 min NNE 7 G 9.9 55°F 51°F1025.3 hPa (+1.3)

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Norwood, Norwood Memorial Airport, MA8 mi48 minE 910.00 miFair54°F34°F47%1025.4 hPa
East Milton, MA9 mi45 minE 10 mi51°F30°F45%1026 hPa
Bedford, Hanscom Field, MA14 mi45 minVar 410.00 miFair53°F28°F38%1026.2 hPa
Boston, Logan International Airport, MA15 mi47 minENE 1510.00 miMostly Cloudy50°F35°F57%1025.8 hPa

Wind History from OWD (wind in knots)
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1 day agoW6W7W86W7SW8SW8SW8W8S4S4S4SW3CalmCalmCalmCalmS4S3CalmCalmCalmS6SW6
2 days agoCalm33W43CalmNE5NE6N3N3CalmS5S5S8S4S5S6S4SE3S4S3S6SW54

Tide / Current Tables for Dover St. Bridge, Fort Point Channel, Boston, Massachusetts
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Dover St. Bridge
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Sun -- 02:44 AM EDT     12.06 feet High Tide
Sun -- 05:40 AM EDT     Sunrise
Sun -- 09:11 AM EDT     -1.62 feet Low Tide
Sun -- 09:26 AM EDT     Moonrise
Sun -- 03:25 PM EDT     10.64 feet High Tide
Sun -- 07:43 PM EDT     Sunset
Sun -- 09:28 PM EDT     -0.25 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.99.711.61210.88.55.52.4-0.2-1.6-11.13.76.69.110.510.496.74.11.6-001.7

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Sun -- 02:15 AM EDT     -0.00 knots Slack
Sun -- 05:40 AM EDT     Sunrise
Sun -- 05:41 AM EDT     -1.33 knots Max Ebb
Sun -- 09:02 AM EDT     0.00 knots Slack
Sun -- 09:26 AM EDT     Moonrise
Sun -- 11:16 AM EDT     1.30 knots Max Flood
Sun -- 02:46 PM EDT     -0.00 knots Slack
Sun -- 06:06 PM EDT     -1.12 knots Max Ebb
Sun -- 07:42 PM EDT     Sunset
Sun -- 09:22 PM EDT     0.00 knots Slack
Sun -- 11:32 PM EDT     1.29 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.310.2-0.5-1-1.3-1.3-1.2-0.9-00.91.31.31.10.6-0.2-0.7-1-1.1-1.1-0.9-0.40.61.2

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (10,2,3,4)
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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.