Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
Popponesset Island, 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 6:55AMSunset 5:57PM Tuesday October 17, 2017 4:19 PM EDT (20:19 UTC) Moonrise 4:28AMMoonset 5:15PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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ANZ232 Nantucket Sound- 320 Pm Edt Tue Oct 17 2017
Tonight..SW winds 5 to 10 kt, becoming W 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Wed..W winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas 2 to 3 ft.
Wed night..SW winds 5 to 10 kt. Seas 2 to 3 ft.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 2 to 3 ft.
Thu night..W winds 5 to 10 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri..NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Fri night..NW winds around 5 kt. Seas around 2 ft.
Sat..W winds around 5 kt. Seas 1 foot or less.
Sat night..SW winds 5 to 10 kt. Seas around 2 ft.
Sun..SW winds 5 to 10 kt. Seas around 2 ft.
Sun night..SW winds around 10 kt. Seas around 2 ft. 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 320 Pm Edt Tue Oct 17 2017
Synopsis for massachusetts and rhode island coastal waters.. Large high pressure will settle across the waters this week. A cold front is expected to cross the region early Fri. 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 Popponesset Island, MA
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location: 41.59, -70.46     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 171900
afdbox
area forecast discussion
national weather service taunton ma
300 pm edt Tue oct 17 2017

Synopsis
High pressure will maintain dry weather and warmer than normal
temperatures through the weekend.

Near term through tonight
High pres south of new eng tonight with light SW flow
developing. Still decent radiational cooling with clear skies
and dry airmass will allow temps to drop to mid 30s in the
coldest spots with patchy frost. No frost headlines as growing
season has ended in those areas with the best chance of frost.

Some patchy frost possible outside of this area but likely not
widespread enough for headlines. Patchy late night valley fog
possible.

Short term Wednesday through Wednesday night
Wednesday...

with high pres to the south, W SW flow will bring milder
airmass into sne. Airmass remains very dry through column so
plenty of sunshine will push afternoon high temps into the
upper 60s to lower 70s.

Wednesday night...

another clear night with light winds, but airmass is moderating
so not as cool with low temps mostly in the 40s.

Long term Thursday through Tuesday
Highlights...

* above average temps and dry conditions lasting into the weekend
* next shot for precip appears to be around Tuesday
pattern overview confidence...

12z guidance is in good agreement for the long term. Upper level
shortwave will move through the flow on Thursday. Behind this wave,
anomalous ridging will develop across the east coast. Heights and
temperatures will rise to 2-3 std above normal. This strong ridge
will last into early next week before a pattern change appears to
take hold of the area. This switch will be associated with the
digging trough across the eastern half of the CONUS by the Tuesday
timeframe.

Details...

temperature forecast...

overall trend in the forecast is for above average temperatures
through the period. Thursday's breezy southwest flow combined with
850 mb temps near 10-12c will result in highs in the low to mid 70s.

Cool front will sweep through the region Thursday night leading to a
cooler day on Friday. Anomalous ridge will begin to build for the
weekend into Monday resulting in high temps into the mid 70s.

Tuesday's temperature forecast is a bit trickier as it is dependent
on the timing of the front. Thus will trend towards a model
consensus until guidance gets a better handling on the fropa.

Precipitation forecast...

frontal system on Thursday will pass through, but lack of moisture
with the front will lead a dry passage. High pressure will take over
the area on Friday through Monday leading to dry weather. Next
chance or precipitation will be around the Tuesday timeframe when a
potent trough will dig into the ohio valley and towards the east
coast. Several waves of low pressure will ride along this through
resulting in a more unsettled weather pattern Tuesday and beyond.

Aviation 18z Tuesday 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 ... High confidence.

Vfr through Wed night. Localized late night river valley fog
possible. SW winds may gust to 20 kt over the outer cape
tonight.

Kbos terminal... High confidence in taf. Brief weak seabreeze
possible until 20z, but not included in taf.

Kbdl terminal... High confidence in taf.

Outlook Thursday through Sunday ...

high confidence.VFR.

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.

Shortwave passing well to the north will bring a period of
increasing W SW winds tonight as high pres settles to the south.

A few gusts to 25 kt possible across mainly eastern ma waters
with building seas so will issue SCA for these waters. Gusts to
20 kt elsewhere. Winds diminish Wed through Wed night.

Outlook Thursday through Sunday ... High confidence.

High pressure prevails through the upcoming weekend with sub sca
conditions. The only exception is that SCA conditions may be
approached Thursday night ahead of a passing front as SW winds could
gust up to 25 kts.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 10 pm this evening to 11 am edt
Wednesday for anz250-254.

Small craft advisory from 10 pm this evening to 7 am edt
Wednesday for anz231-251.

Synopsis... Kjc dunten
near term... Kjc
short term... Kjc
long term... Dunten
aviation... Kjc dunten
marine... Kjc dunten


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 3 mi95 min 1.9 55°F 1024 hPa38°F
BZBM3 - 8447930 - Woods Hole, MA 12 mi50 min 55°F 64°F1024.3 hPa
44020 - NANTUCKET SOUND 18 mi90 min N 5.8 G 5.8 52°F 61°F2 ft1024.3 hPa (-0.4)43°F
44090 19 mi50 min 60°F2 ft
NTKM3 - 8449130 - Nantucket Island, MA 29 mi50 min NNE 2.9 G 7 54°F 61°F1024.7 hPa
BUZM3 - Buzzards Bay, MA 33 mi80 min SW 4.1 G 5.1 51°F 1025 hPa (-0.9)
FRVM3 - 8447386 - Fall River, MA 38 mi50 min 56°F 65°F1024.7 hPa
FRXM3 39 mi50 min 56°F 31°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi50 min SSW 5.1 G 7 56°F 1023.3 hPa
PRUR1 45 mi50 min 55°F 31°F
NWPR1 - 8452660 - Newport, RI 46 mi50 min SW 1.9 G 4.1 56°F 62°F1024.1 hPa
NAXR1 - Narragansett Bay Reserve, RI 47 mi95 min E 2.9 55°F 1002 hPa33°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 47 mi50 min S 1 G 2.9 56°F 1024.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 48 mi50 min SE 5.1 G 6 54°F 64°F1023.9 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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Last
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N9
G17
N11
G16
N12
G16
N11
G16
N12
G17
N16
G22
N16
G24
N14
G25
N16
G21
N15
G22
N10
G18
N9
G20
N7
G17
N12
G17
N14
G21
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G22
N13
G20
N12
G17
N10
G15
N8
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N8
G14
N7
G10
N5
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G7
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SW10
SW11
G18
SW9
G19
SW12
G19
SW12
G21
SW10
G18
SW11
G19
SW9
G17
SW12
G16
SW8
G16
SW9
G17
SW6
G12
SW8
G13
SW7
G14
SW5
G10
W5
G8
NW6
G10
NW9
G13
NW7
G15
NW5
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N8
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N9
G14
N8
G12
2 days
ago
SW2
S2
SW3
W4
NW3
G6
N1
N2
N1
G4
N3
E3
E2
E2
S1
SW1
SW1
SW2
SW4
G8
SW7
SW7
G11
SW9
G15
SW6
G16
SW8
G14
SW8
G11
SW8
G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA6 mi25 minN 010.00 miFair54°F35°F51%1024.4 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA11 mi24 minNNE 410.00 miFair54°F36°F51%1024 hPa
Marthas Vineyard Airport, MA15 mi27 minWSW 310.00 miFair55°F37°F51%1024.4 hPa

Wind History from FMH (wind in knots)
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Last 24hrN7
G13
NW7
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NW6NW7NW8NW8
G14
N7
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G18
N9
G15
NW7NW7
G13
NW10NW6NW7
G13
NW9NW7N7N8N11N7
G15
N7NE9NE7SW4
1 day agoSW15SW15
G22
SW19
G27
SW16
G24
SW18
G30
SW23
G30
SW20
G34
SW23
G36
SW21
G32
SW21
G31
SW21
G27
SW16
G23
SW15
G23
SW14NW8NW5NW9
G15
W10W8NW9NW6N6NE11
G16
N10
2 days agoNE8E6NW5N4N4CalmCalmCalmCalmCalmSE3CalmCalmCalmCalmCalmCalmSW7SW10SW11SW15
G21
SW14SW13
G20
SW14
G20

Tide / Current Tables for Poponesset Island, Poponesset Bay, Nantucket Sound, Massachusetts
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Poponesset Island
Click for Map
Tue -- 04:28 AM EDT     Moonrise
Tue -- 05:38 AM EDT     -0.03 feet Low Tide
Tue -- 06:56 AM EDT     Sunrise
Tue -- 12:09 PM EDT     2.48 feet High Tide
Tue -- 05:15 PM EDT     Moonset
Tue -- 05:57 PM EDT     Sunset
Tue -- 06:03 PM EDT     -0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.52.21.81.20.50-00.20.61.21.82.32.52.421.50.80.2-00.10.511.62.2

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Tue -- 02:01 AM EDT     0.01 knots Slack
Tue -- 04:29 AM EDT     Moonrise
Tue -- 05:22 AM EDT     4.46 knots Max Flood
Tue -- 06:57 AM EDT     Sunrise
Tue -- 08:30 AM EDT     -0.14 knots Slack
Tue -- 11:16 AM EDT     -4.51 knots Max Ebb
Tue -- 02:30 PM EDT     0.20 knots Slack
Tue -- 05:15 PM EDT     Moonset
Tue -- 05:43 PM EDT     4.32 knots Max Flood
Tue -- 05:57 PM EDT     Sunset
Tue -- 08:45 PM EDT     -0.08 knots Slack
Tue -- 11:37 PM EDT     -4.68 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-4.1-3.1-0.53.14.14.44.43.82.4-2.4-3.9-4.5-4.4-3.7-2.22.23.64.24.33.92.9-1.7-3.7-4.6

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 (16,3,4,5)
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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.