Wednesday, August23, 2017 L-36.com


Marine Weather and Tides
North Plymouth, 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 5:59AMSunset 7:32PM Wednesday August 23, 2017 4:21 AM EDT (08:21 UTC) Moonrise 7:54AMMoonset 8:47PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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
    EDIT      (on/off)   Help
ANZ231 Cape Cod Bay- 338 Am Edt Wed Aug 23 2017
.small craft advisory in effect until 7 am edt this morning...
Today..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to around 5 kt this afternoon. Seas 2 to 3 ft. Patchy fog this morning. A slight chance of showers and tstms this morning with vsby 1 to 3 nm.
Tonight..NW winds around 5 kt. Seas 1 foot or less.
Thu..NW winds 5 to 10 kt, becoming ne in the afternoon. Seas 1 foot or less.
Thu night..S winds 5 to 10 kt, becoming nw after midnight. Seas 1 foot or less.
Fri..N winds 5 to 10 kt. Seas around 2 ft.
Fri night..NE winds 5 to 10 kt, becoming nw after midnight. Seas 1 foot or less.
Sat..N winds 5 to 10 kt. Seas around 2 ft.
Sat night..SW winds 5 to 10 kt. Seas 1 foot or less.
Sun..NE winds 5 to 10 kt. Seas 1 foot or less.
Sun night..NE winds 5 to 10 kt. Seas 1 foot or less. Winds and seas 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 338 Am Edt Wed Aug 23 2017
Synopsis for massachusetts and rhode island coastal waters.. A cold front will push southeast across the waters through this evening. Large high pres will then build in from the west Thu and remain in control through the weekend. 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 North Plymouth, MA
   Hourly   EDIT   Help
location: 41.99, -70.68     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 230809
afdbox
area forecast discussion
national weather service taunton ma
409 am edt Wed aug 23 2017

Synopsis
A cold front crosses most of the region this morning bringing
beautiful weather today an end to the oppressive humidity,
except for the CAPE and islands where low clouds and muggy
conditions will persist into this afternoon. Otherwise, high
pressure brings dry weather with very comfortable humidity
levels Thursday through early next week.

Near term until 6 pm this evening
***much lower humidity will bring beautiful weather today
except across the CAPE islands where low clouds and muggy
conditions linger into the afternoon***
isolated spot showers early this morning will be coming to an
end across most areas by daybreak as drier air works into the
region. However, will have to watch for an area of showers and
perhaps an isolated thunderstorm or two that may clip the far
southeast new england coast into mid morning but it may also
remain just offshore.

Otherwise, much drier air will work into most of the region
behind this morning S cold frontal passage. Skies will become
partly to mostly sunny from northwest to southeast as highs
top out between 80 and 85, with much more comfortable humidity.

The exception to this will be across the CAPE islands, where the
cold front will get hung up. While we do expect any left over
showers to come to an end by late morning, an abundance of
clouds will likely remain in place into the afternoon along with
muggy conditions persisting.

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

much drier air along with mainly clear skies diminishing wind
will result in a much cooler night. The cold front will also
finally clear CAPE islands this evening, allowing any left over
low clouds to exit the region. Low temps across much of the
region will bottom out well down into the 50s by daybreak
Thursday. Patchy fog may develop late in the typically prone
locations, but not expecting anything widespread.

Long term Thursday through Tuesday
The persistence of low pressure across the gulf of alaska rebuilds
the monsoonal high over the 4-corners region of the conus. The flux
of milder, pacific air into central canada enhances the shearing
flow equatorward across SE canada and NE CONUS with reinforcing
shots of cooler, drier air. Keeping the tropical-moist axis at bay,
well S E of the region draped E off the mid-atlantic, looking at
slightly cooler than average conditions with comfortable conditions
under a continual influence of 1025 surface high pressure and light
winds.

While the atmosphere devoid of moisture, will need to watch two
periods in particular of spot shower activity given stronger mid-
level ascent across the region as individual shortwaves rotate
through towards the rear of the prevailing h5 troughing pattern
across SE canada into early next week. This in addition to steep
lapse rates via a maintained cold pool aloft with h85 temperatures
hovering around +6-8c beginning roughly Friday and continuing into
early next week as well. However restrained, agree with the prior
forecaster that within the upper level jet axis with predominant
confluent flow, in the left entrance region which, ageostrophically,
is a region more so of subsidence.

Consensus of forecast guidance through 12z Monday, then forecast
guidance diverges on mid-upper level features and will thus focus on
ensemble means between the GEFS and ecens. Overall, similar thinking
as earlier, looking like a prolonged period of dry weather with low
humidity, low dewpoints, making for comfortable conditions. Highs
around the mid to low 70s with lows down into the 50s. Scattered
cloud decks at times. Dewpoints ranging in the upper 40s to low
50s.

Aviation 08z Wednesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through tonight ...

today... High confidence in tafs except moderate confidence
across the CAPE and islands.VFR conditions as much drier air
works into most locations. The exception will be the
cape islands, where low clouds may linger through the morning
and perhaps well into the afternoon especially across nantucket.

Tonight... High confidence. MainlyVFR except for perhaps some
lingering fog and low clouds during the evening across
nantucket. May also see some patchy ground fog develop in the
typically prone locations toward daybreak, but nothing
widespread is expected.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Thursday through Sunday ...

vfr. Daytime sct low-endVFR CIGS 4-5 kft agl. N W winds throughout,
light at times to allow onshore E sea-breezes.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through tonight ... High confidence.

Today and tonight... Southwest low level jet weakens through 12z
allowing small craft wind gusts to come to an end. However, seas
will be slower to diminish but should drop below criteria across
all waters by mid afternoon. Winds and seas will remain below
small craft advisory thresholds tonight as cold front clears the
entire region this evening.

Outlook Thursday through Sunday ...

good boating weather throughout. N winds persisting. Reinforcing
shots of cool, dry weather as high pressure builds into the region.

Subsequent slight enhancement in winds, gusts remaining below 20 kts
with seas 4 feet or less.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 7 am edt this morning for
anz231>234-251.

Small craft advisory until 2 pm edt this afternoon for anz235-
237-250-254>256.

Synopsis... Frank sipprell
near term... Frank
short term... Frank
long term... Sipprell
aviation... Frank sipprell
marine... Frank sipprell


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 21 mi47 min 68°F3 ft
44013 - BOSTON 16 NM East of Boston, MA 25 mi91 min S 14 G 16 70°F 66°F2 ft1005.1 hPa (-0.8)
WAXM3 - Waquoit Bay Reserve, MA 29 mi96 min 6 76°F 1008 hPa73°F
BZBM3 - 8447930 - Woods Hole, MA 32 mi51 min 73°F 73°F1007.6 hPa
BHBM3 - 8443970 - Boston, MA 32 mi51 min 75°F 1004.1 hPa
FRVM3 - 8447386 - Fall River, MA 32 mi51 min 75°F 75°F1007.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 33 mi51 min SSW 19 G 25 76°F 1005.5 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 37 mi77 min S 12 G 14 69°F 64°F3 ft1004.2 hPa
PVDR1 40 mi51 min SSW 8.9 G 11 76°F 1005.9 hPa71°F
CPTR1 - 8452944 - Conimicut Light, RI 40 mi51 min SSW 13 G 18 75°F 74°F1006.1 hPa
FOXR1 - 8454000 - Providence, RI 40 mi51 min SW 8 G 13 76°F 73°F1005.8 hPa
PRUR1 42 mi51 min 74°F 71°F
NAXR1 - Narragansett Bay Reserve, RI 43 mi96 min NNW 11 76°F 1007 hPa73°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 43 mi51 min W 9.9 G 16 75°F 1006.3 hPa
BUZM3 - Buzzards Bay, MA 45 mi81 min SSW 23 G 24 71°F 1007.9 hPa (-0.3)
44020 - NANTUCKET SOUND 46 mi91 min SSW 23 G 27 73°F 73°F3 ft1007.8 hPa (-0.7)73°F
QPTR1 - 8454049 - Quonset Point, RI 48 mi51 min SW 12 G 15 75°F 73°F1006.4 hPa
NWPR1 - 8452660 - Newport, RI 48 mi51 min SW 9.9 G 14 71°F 69°F1006.6 hPa

Wind History for Borden Flats Light at Fall River, MA
(wind in knots)    EDIT      (on/off)   Help
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
Last
24hr
SW10
SW12
G15
SW10
SW14
SW11
G14
SW11
SW12
SW15
SW13
G16
S13
G17
S17
G22
SW17
G22
SW23
G29
SW22
SW17
SW21
G26
SW17
G23
S19
G26
SW24
G32
SW23
G29
SW24
G29
SW21
G27
SW15
G20
SW12
G18
1 day
ago
W5
SW4
--
SW3
SW5
SW4
SW5
SW6
SW9
SW9
S9
G12
SW12
SW16
SW15
SW13
SW12
G15
SW11
SW6
SW10
SW9
SW12
SW9
SW11
SW12
2 days
ago
SW7
W6
W5
NW10
G13
NW11
G17
NW10
G13
NW12
G15
W11
W10
G15
W14
G17
NW13
G17
W12
G18
NW11
G14
NW9
NW5
NW6
NW3
NW6
W2
W4
W4
W3
W2
SW4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Plymouth, Plymouth Municipal Airport, MA6 mi29 minSSW 1110.00 miLight Rain74°F70°F88%1006.3 hPa
Marshfield Airport, MA7 mi46 minSW 10 G 1610.00 miFair77°F73°F89%1005.4 hPa
Taunton, Taunton Municipal Airport, MA19 mi29 minSSW 1010.00 miFair75°F70°F84%1005.7 hPa
Otis Air National Guard Base, MA24 mi26 minSW 17 G 2310.00 miOvercast75°F73°F94%1007.4 hPa

Wind History from PYM (wind in knots)
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
Last 24hrCalmS3S4S7S6SW8SW12SW15
G22
SW13
G20
SW10SW15
G20
SW13
G23
S7
G17
SW11
G20
SW12
G18
S13
G22
S12
G26
S12
G20
SW17
G27
SW15
G23
SW17
G29
SW13
G23
SW15
G22
SW11
1 day agoCalmCalmCalmW6NW5W5W4SW5W7SW10
G16
SW8SW7SW9SW12SW6SW7S4SW7SW5SW4S3S5SW4Calm
2 days agoCalmSW3W6W8W9W11W8W7NW12W10NW10NW10NW9NW8NW6NW4CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Plymouth, Cape Cod Bay, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Plymouth
Click for Map
Wed -- 12:41 AM EDT     11.82 feet High Tide
Wed -- 05:59 AM EDT     Sunrise
Wed -- 07:11 AM EDT     -1.10 feet Low Tide
Wed -- 07:53 AM EDT     Moonrise
Wed -- 01:12 PM EDT     11.05 feet High Tide
Wed -- 07:29 PM EDT     -0.59 feet Low Tide
Wed -- 07:30 PM EDT     Sunset
Wed -- 08:46 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.411.710.78.65.92.80.2-1.1-0.51.44.27.39.91110.79.26.84.11.3-0.4-0.31.33.86.9

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Wed -- 01:50 AM EDT     -5.07 knots Max Ebb
Wed -- 05:04 AM EDT     0.02 knots Slack
Wed -- 05:59 AM EDT     Sunrise
Wed -- 07:53 AM EDT     Moonrise
Wed -- 08:13 AM EDT     4.81 knots Max Flood
Wed -- 11:32 AM EDT     -0.03 knots Slack
Wed -- 02:18 PM EDT     -4.79 knots Max Ebb
Wed -- 05:24 PM EDT     0.02 knots Slack
Wed -- 07:29 PM EDT     Sunset
Wed -- 08:27 PM EDT     4.59 knots Max Flood
Wed -- 08:46 PM EDT     Moonset
Wed -- 11:41 PM EDT     -0.15 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3.7-4.8-5.1-4.6-3.5-0.93.34.44.84.742.6-2.4-4.1-4.8-4.6-3.8-2.12.544.54.542.8

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (4,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.