Wednesday, July26, 2017 L-36.com


Marine Weather and Tides
Province, 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 5:28AMSunset 8:06PM Wednesday July 26, 2017 12:32 AM EDT (04:32 UTC) Moonrise 9:05AMMoonset 10:15PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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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ANZ231 Cape Cod Bay- 948 Pm Edt Tue Jul 25 2017
Overnight..N winds 5 to 10 kt. Seas 2 to 3 ft.
Wed..N winds around 5 kt, becoming E in the afternoon. Seas 1 foot or less.
Wed night..S winds around 5 kt. Seas 1 foot or less.
Thu..S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 1 foot or less.
Thu night..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Fri..W winds 5 to 10 kt, becoming se in the afternoon. Seas 1 foot or less. Showers likely. Vsby 1 to 3 nm.
Fri night..E winds 5 to 10 kt, becoming ne 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 foot or less. Showers likely. Vsby 1 to 3 nm.
Sat..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..N winds 5 to 10 kt. Seas 2 to 3 ft.
Sun..NE winds 5 to 10 kt. Seas 1 foot or less.
Sun night..SW winds 5 to 10 kt. Seas 1 foot or less. 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 948 Pm Edt Tue Jul 25 2017
Synopsis for massachusetts and rhode island coastal waters.. High pres builds over the waters for late tonight and Wed but will slide east of the waters by Thu. Another coastal storm may track south of new eng Fri into early Sat. High pres builds in from the west on 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 Province, MA
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location: 41.99, -70.06     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 260145
afdbox
area forecast discussion
national weather service taunton ma
945 pm edt Tue jul 25 2017

Synopsis
High pressure will bring clearing skies tonight and a return to
dry and warmer weather for Wednesday and into Thursday. A low
pressure wave will move along an approaching cold front late
Thursday, passing across the region during Friday. Some leftover
showers may linger across southern areas for part of Saturday
along with cool northeast winds. Dry, seasonable conditions
return late next weekend into early next week.

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

clearing from the east has overspread much of sne with back
edge of the clouds moving through the ct valley. Clear skies and
light winds will result in good radiational cooling with lows
well down into the 50s with some upper 40s possible interior e
ma and upper ct valley, rather notable for late july. Patchy
radiation fog likely to develop in normally fog prone
locations.

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

surface high pressure and upper ridging will dominate across a
dry air mass. Anticipate plenty of sunshine with just some
afternoon cumulus and temperatures generally in the upper 70s
and perhaps near 80 in the lower portions of the merrimack and
connecticut rivers. Temperatures may be capped in the mid 70s
along coastal areas due to developing seabreezes.

Wednesday night...

expect dry conditions to prevail but will probably experience
increasing high clouds late ahead of a shortwave trough dropping
southeast from central canada. A weak SW gradient will become
established.

Long term Thursday through Tuesday
Highlights...

* dry early Thursday
* showers and isolated thunderstorms move into northern and western
areas Thursday afternoon evening
* best chance for showers scattered thunderstorms Thursday night
through Friday night
* a few showers linger into sat, then dry but cool conditions
* dry and seasonable weather likely Sunday into Monday
overview and model preferences...

weak h5 ridge pushes E to the maritimes early in this period,
while digging h5 trough moves e-se out of the great lakes.

However, individual model solutions vary on the intensity of the
trough as it shifts e. This is giving widening surface solution
spread as the surface front and possible wave development
during the Thu night-fri timeframe.

12z GFS appears to be an outlier as it pushes this system
further S late this week and keeps the wave weaker further s.

Also, GFS blasts the h5 short wave offshore by late Thu thu
night, while most of the remaining suite is slower. A few
members even try to develop h5 bubble cutoff in the NW flow over
the western great lakes Thu night Fri and move it eastward.

While the GFS moves the surface front offshore, the 12z ggem and
00z ECMWF keep the front a bit further N but also have low pres
moving along it. The 12z NAM is a bit more toward the ggem ec
camp, though a bit further S with the developing low over the
lower appalachians. By Friday night, most models have the low
passing S of new england, but northern fringe of the precip may
reach into the region though each solution varies on how far n
the precip shield extends. Have low to moderate confidence
during the late week timeframe. Am leaning toward a non-gfs
blend especially for the Thu night to Fri night timeframe.

Beyond this, should see the h5 trough move offshore during the
upcoming weekend, but noting broad long wave troughing setting
up across the eastern half of the u.S. While high amplitude
ridge builds from the west coast into british columbia. Should
see generally dry but cooler than seasonal norm temps with
continued NE wind flow as surface high builds across the western
great lakes northern plains. Overall, will use blend of
models ensembles for this timeframe.

Details...

Thursday...

high pressure ridge shifts S Thursday with SW winds in place.

Leading edge of clouds scattered showers look to push into
northern areas from NE through central-w mass into N central ct
during Thu afternoon. Marginal instability, but could see a few
isolated thunderstorms through 00z or so. Highs will be mainly
in the 70s, ranging to around 80 across the lower ct valley. Sw
winds may gust up to 15-20 kt along S coastal areas, CAPE cod
and the islands.

Thursday night through Friday night...

models continue to signal low pressure wave shifting E from the
ohio valley along the passing cold front. Some model
differences in frontal placement and how quickly the low moves
e. At this point, looks like best chance for showers scattered
thunderstorms will occur during this timeframe. Decent
instability with this front. Best shot for precip will occur
mainly near and S of the mass pike where likely pops are in
place. Noting good slug of QPF pushing through, with 1-1.5
inches possible across S coastal ri and SE mass during this
timeframe.

Winds shift to n-ne as the low passes during fri, then will pick
up late Fri fri night mainly along the S coast as h925 jet up to
40-45 kt passes. Winds may gust up to 20-25 kt along the
immediate S coast CAPE cod and the islands for a time mainly
around or after midnight Fri night.

Saturday...

showers may linger along the S coast through at least midday
sat, depending upon how fast the low pushes offshore, allowing
the front to move further s. Conditions should improve during
the afternoon but it will be cool with NE winds in place for
most of the day. Highs will only be in the 70s.

Sunday-Monday...

looks dry as high pressure to the W holds in place. Light winds
will be in place as well. Temps will rebound close to seasonal
levels.

Tuesday...

low pressure may develop on the front S of new england, while
another cold front approaches from the NW with its own wave. Big
question will be how quickly the northern front approaches.

Kept only slight chance pops for the entire area for now. Temps
continue close to seasonal norms. Rather low confidence.

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 ...

through tonight... High confidence.

Vfr with clearing skies moving SW this evening. Patchy late
night fog may occur at some interior airports for a few hours.

Wednesday... High confidence.

Vfr. Any patchy interior valley fog should burn off by 12z-13z.

Wednesday night... High confidence.VFR.

Kbos terminal... High confidence.VFR. Sea breeze expected to
develop by mid to late Wednesday morning.

Kbdl terminal... High confidence. MVFR CIGS lifting toVFR by
around 22z.VFR for rest of the period.

Outlook Thursday through Sunday ...

Thursday... Moderate confidence.

MainlyVFR. May see local MVFR vsbys in scattered
showers isolated thunderstorms from about a kbvy-korh-kijd line
westward Thu afternoon. SW winds may gust to 20 kt along s
coastal terminals.

Thursday night through Friday night... Moderate confidence.

MainlyVFR cigs, but pockets of MVFR-ifr in heavier
shra isolated tsra. Areas of widespread shra mainly from the
mass pike S late Thu night and fri, with sct shra N of the pike.

Patchy late night early morning fog with local ifr vsbys. Winds
will be shifting through the period, but cannot rule out some
gusts to around 20 kt as these shifts occur.

Saturday... Moderate confidence.

May see pockets of MVFR conditions along S coast in lingering
shra and patchy fog. Otherwise mainlyVFR. NE winds gusting to
around 20 kt from plymouth county southward through midday then
diminish.

Sunday... Moderate to high confidence.

Vfr. Light n-ne winds with local sea breezes.

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.

945 pm update...

dropped SCA for eastern waters as seas have subsided below 5
ft.

Tonight... Seas will gradually subside overnight. Small craft
advisories for hazardous seas continues through 11 pm for mass
bay and ipswich bay, as even a light n-ne flow was keeping seas
elevated to 5 or 6 feet there. Seas will remain higher through
most of the night across the eastern outer waters to E and S of
nantucket, where small crafts remain in place as well.

Wednesday... High pres over the waters will result in light
winds with near shore seabreezes. Seas will be below sca
thresholds.

Wednesday night... Winds shift to s-se as high moves off the s
coast, then will shift to SW and pick up on the eastern outer
waters after midnight. Seas 4 ft or less.

Outlook Thursday through Sunday ...

conditions should be mainly below small craft criteria for most
of this period. May see n-ne winds gusting up to 25 kt on the
southern open waters late Fri night through Sat as front
passes. Seas also build up to 5-6 ft on the southern outer
waters for a time Sat into Sat evening. Rain and fog will lead
to visibility restrictions especially Thu night into fri.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Evt thompson
near term... Kjc thompson
short term... Thompson
long term... Evt
aviation... Evt thompson
marine... Evt thompson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 18 mi58 min 57°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 37 mi107 min 2.9 57°F 1022 hPa55°F
44020 - NANTUCKET SOUND 39 mi42 min 69°F1 ft1021.4 hPa (+0.0)
44013 - BOSTON 16 NM East of Boston, MA 40 mi42 min WNW 7.8 G 7.8 62°F 63°F4 ft1022.8 hPa (+0.5)
BZBM3 - 8447930 - Woods Hole, MA 46 mi44 min 62°F 69°F1022.3 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 46 mi88 min W 3.9 G 5.8 62°F 62°F3 ft1021.9 hPa
NTKM3 - 8449130 - Nantucket Island, MA 49 mi44 min NNE 7 G 11 62°F 69°F1021.9 hPa

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Provincetown Municipal Airport, MA8 mi36 minNNW 410.00 miFair58°F55°F90%1022.8 hPa
Chatham, Chatham Municipal Airport, MA20 mi40 minN 010.00 miFair58°F55°F93%1022.6 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA24 mi36 minN 610.00 miFair59°F55°F90%1022 hPa

Wind History from PVC (wind in knots)
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Last 24hrNE12N9N7N9N9N9N10N9N7NE11NE11NE9NE6N8N7N5N7N5N6N5N6NW4N5N4
1 day agoE5E6E4E6E7E8E9E8--E11E17
G22
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2 days agoS5S3CalmCalmNE7NE13
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NE13NE8NE9NE10NE10NE7NE8NE9E7E6E4E4E5SE4

Tide / Current Tables for Cape Cod Lighthouse, SE of, Cape Cod, Massachusetts
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Cape Cod Lighthouse
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Wed -- 01:58 AM EDT     9.33 feet High Tide
Wed -- 05:27 AM EDT     Sunrise
Wed -- 08:16 AM EDT     -1.04 feet Low Tide
Wed -- 09:04 AM EDT     Moonrise
Wed -- 02:34 PM EDT     8.52 feet High Tide
Wed -- 08:04 PM EDT     Sunset
Wed -- 08:34 PM EDT     -0.28 feet Low Tide
Wed -- 10:15 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
78.89.38.77.14.92.40.2-1-0.70.72.757.18.38.47.55.83.61.5-0-0.112.8

Tide / Current Tables for Provincetown, Massachusetts
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Provincetown
Click for Map
Wed -- 02:02 AM EDT     11.08 feet High Tide
Wed -- 05:28 AM EDT     Sunrise
Wed -- 08:22 AM EDT     -1.41 feet Low Tide
Wed -- 09:04 AM EDT     Moonrise
Wed -- 02:38 PM EDT     10.10 feet High Tide
Wed -- 08:05 PM EDT     Sunset
Wed -- 08:40 PM EDT     -0.49 feet Low Tide
Wed -- 10:15 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.110.311.110.48.66.13.10.3-1.3-1.10.52.85.68.29.8108.974.51.8-0.1-0.40.82.9

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 (0,6,7,8)
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Ground Weather Radar Station Boston, MA
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weather_mapweather_map weather_map

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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.