Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Sandwich, 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 6:58AMSunset 4:48PM Wednesday January 24, 2018 2:21 AM EST (07:21 UTC) Moonrise 12:05PMMoonset 12:24AM Illumination 50% 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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ANZ231 Cape Cod Bay- 117 Am Est Wed Jan 24 2018
.small craft advisory in effect through this afternoon...
Rest of tonight..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Wed..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Wed night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft.
Thu..NW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 3 to 5 ft.
Thu night..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. A chance of freezing spray.
Fri..NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..SW winds 5 to 10 kt, becoming S 10 to 15 kt after midnight. Seas around 2 ft.
Sat..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Sat night..SW winds 15 to 20 kt. Seas around 2 ft. A chance of rain.
Sun..SW winds 10 to 15 kt. Seas around 2 ft. A chance of rain.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Rain likely. 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 117 Am Est Wed Jan 24 2018
Synopsis for massachusetts and rhode island coastal waters.. A cold front approaches from the northwest overnight, then will cross the waters Wednesday morning with winds shift to W to nw. Winds will remain gusty Wednesday through Thursday as large high pres builds toward the waters. The high will crest over the waters on Friday, then shifting east of the waters through Saturday. 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 Sandwich, MA
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location: 41.78, -70.49     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 240557
afdbox
area forecast discussion
national weather service taunton ma
1257 am est Wed jan 24 2018

Synopsis
Drier air works into the region behind a cold front overnight.

Blustery, dry and colder weather follows Wednesday through
Friday, then a warming trend next weekend. A cold front may
bring showers next Sunday or Monday.

Near term until 6 am this morning
1 am update...

secondary cold front and true post frontal airmass arrives 4 am
- 7 am from west to east. This is when winds will shift to the
wnw and become gusty. Until expect light wsw winds. Could see
some patchy black ice overnight into predawn hours across the
ct river valley and the merrimack valley of northeast ma as
winds become light and some radiational cooling takes place.

Short term 6 am this morning through 6 pm Thursday
Wednesday...

a west northwest flow of more seasonable temperatures will be
working back into the region on Wednesday. High temps will not
recover too much... Generally remaining in the 30s to near 40 across
parts of the coastal plain. Should be at least partial
sunshine... But do expect some strato-cumulus clouds that will be
focused across the interior. West to northwest winds will gust to
between 25 and 30 mph at times.

Long term Thursday night through Tuesday
Highlights...

* dry but cooler weather for the rest of the work week
* above average temperatures for Saturday and Sunday
* next shot of wet weather will be around Sun mon
overview...

12z guidance is in general agreement with the upcoming medium and
long range. Progressive pattern over the region as ongoing upper
level trough will push offshore as mid-level ridge builds into the
area by the weekend. For the end of the period, still some
uncertainty regarding the timing and amplitude of the upper level
trough moving from the northern plains towards the east coast sun
into Monday. GFS continues to be on the faster side of the envelope
compared to the ec and ukmet. If the guidance continues to trend
towards the slower envelope, than there is the potential for a more
significant surface low to develop. This could result in warmer
temps for the weekend, and heavier rainfall. If it is weaker, than
cannot rule out some trapped cold air resulting in p-type issues.

Still a lot of uncertainty and will trend towards a blend of the
guidance until details can be sorted.

Wednesday night into Friday... High confidence.

Building high pressure across the southeast will build across the us
east coast resulting in dry weather through the period. Still some
thermal gradients in the mid-levels as upper level shortwave passes
through on Thursday. This will result in a breezy but chill day.

Temperatures will still be in the 30s on Friday, but with less winds
should make it feel warmer. Some mid-level moisture around 850-700mb
will help bring in some clouds but overall a pleasant january day is
on tap.

Saturday into Monday... Moderate confidence.

Subtropical ridge will build across the us east coast over the
weekend as northern stream system approaches the northeast. All
guidance as well as the ensembles are indicating precipitation for
the area. Biggest uncertainty is the amount, exact timing and if
all precip will be liquid. Current forecast is an ongoing blend of
the guidance with a trend towards the UKMET and ec. Thus expect
precipitation to move into the area on Sunday as mostly rain and
temperatures will be well above average thanks to southerly llj.

If precip lingers into Monday, CAA behind the system could switch
any precip to snow, but overall confidence is low that this will
occur. Will need better guidance to see this potential.

Aviation 06z Wednesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday ...

06z update...

thru 12z...

vfr, dry runways and light winds. Could have some black ice at
before winds pickup from the wnw 09z-12z.

After 12z...

marginal MVFR with CIGS bkn030 12z-17z thenVFR this afternoon.

Modest wnw winds 15-25g30kt.

Tonight and Thursday...

vfr, dry weather and modest nnw winds 15-25 kt few gusts up to
30 kt possible.

Kbos terminal... High confidence in TAF with wind shift to the
wnw 15-25 kt beginning 11z-13z.

Kbdl terminal... High confidence in TAF with wind shift to the
wnw 15-30kt beginning 09z-11z.

Outlook Thursday night through Sunday ...

Thursday night:VFR. Windy with local gusts to 30 kt.

Friday:VFR. Breezy.

Friday night:VFR.

Saturday:VFR. Windy with gusts to 30 kt.

Saturday night: mainly MVFR, with areasVFR possible. Breezy.

Chance ra.

Sunday: mainly MVFR, with areas ifr possible. Breezy. Ra
likely.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday ...

minor changes were made with this update to reflect the latest
trends in observations and guidance. The forecast appears on
track.

Overnight... High confidence. Have converted the gale warnings
to SCA with LLJ pushing east of the waters. May see a temporary
lull in the winds... But they will pick back up after midnight
with wsw gusts of 25 to 30 knots developing in the cold air
advection pattern.

Wednesday... High confidence. Wnw wind gusts of 25 to 30 knots in
the cold air advection pattern. SCA headlines will be needed for
most waters.

Outlook Thursday night through Sunday ...

Wednesday night: low risk for small craft advisory winds with
gusts up to 25 kt. Seas up to 5 ft.

Thursday: moderate risk for small craft advisory winds with
gusts up to 30 kt. Seas up to 5 ft. Chance of freezing spray.

Thursday night: moderate risk for small craft advisory winds
with gusts up to 30 kt. Areas of rough seas. Chance of freezing
spray.

Friday: low risk for small craft advisory winds with gusts up
to 25 kt. Seas locally approaching 5 ft.

Friday night: winds less than 25 kt.

Saturday: low risk for small craft advisory winds with gusts up
to 30 kt. Local rough seas.

Saturday night: winds less than 25 kt. Local rough seas. Chance
of rain.

Sunday: winds less than 25 kt. Areas of seas approaching 5 ft.

Chance of rain.

Hydrology
A flood warning remains in effect for the ct river at middle
haddam... But there are no other hydro concerns at this point.

For details on specific area rivers, including observed and
forecast river stages, please visit the advanced hydrologic
prediction service (ahps) graphs on our website.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 6 pm est this evening for
anz230>237-250-251-254>256.

Synopsis... Frank dunten
near term... Frank nocera
short term... Frank
long term... Dunten
aviation... Frank nocera dunten
marine... Frank dunten
hydrology... Staff


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 9 mi51 min 37°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 14 mi96 min 1.9 41°F 1003 hPa40°F
BZBM3 - 8447930 - Woods Hole, MA 20 mi51 min 39°F 35°F1003.9 hPa
44020 - NANTUCKET SOUND 29 mi91 min WSW 9.7 G 12 38°F 37°F1 ft1003.1 hPa (+1.8)38°F
FRVM3 - 8447386 - Fall River, MA 36 mi51 min 42°F 37°F1004.2 hPa
FRXM3 37 mi51 min 41°F 36°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 37 mi51 min W 7 G 8 42°F 1003.1 hPa
BUZM3 - Buzzards Bay, MA 39 mi81 min WSW 18 G 19 41°F 1003.9 hPa (+1.5)
NTKM3 - 8449130 - Nantucket Island, MA 40 mi51 min W 8.9 G 14 42°F 36°F1004.1 hPa
44013 - BOSTON 16 NM East of Boston, MA 40 mi91 min WSW 14 G 16 42°F 40°F3 ft1001.8 hPa (+1.6)
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi51 min W 2.9 G 5.1 40°F 1003.9 hPa
CPTR1 - 8452944 - Conimicut Light, RI 46 mi51 min WSW 8.9 G 11 42°F 37°F1003.8 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi96 min W 4.1 40°F 986 hPa39°F
PVDR1 47 mi51 min WSW 5.1 G 6 44°F 1003.8 hPa37°F
FOXR1 - 8454000 - Providence, RI 48 mi51 min W 5.1 G 6 43°F 36°F1003.4 hPa
NWPR1 - 8452660 - Newport, RI 48 mi51 min W 6 G 8.9 42°F 38°F1003.9 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA9 mi26 minSSW 44.00 miFog/Mist36°F35°F100%1004.4 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA13 mi25 minW 510.00 miA Few Clouds41°F39°F93%1003.6 hPa
Plymouth, Plymouth Municipal Airport, MA16 mi29 minWSW 610.00 miFair40°F34°F79%1003.5 hPa
Provincetown Municipal Airport, MA22 mi25 minW 910.00 miFair39°F35°F86%1003.6 hPa
Marshfield Airport, MA24 mi26 minWSW 310.00 miFair39°F35°F87%1003 hPa

Wind History from FMH (wind in knots)
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Last 24hrS7SE6S7S10S15S14
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1 day agoCalmCalmCalmNE4CalmSE4CalmCalmE4NE5E4E4--NE6NE6E9E7E11E12
G18
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2 days agoSW6W9W4W6W4CalmW4W6NW8NW6N63E4
G10
NE6CalmS3CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Cape Cod Canal (East Entrance), Massachusetts
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Cape Cod Canal (East Entrance)
Click for Map
Wed -- 04:05 AM EST     8.82 feet High Tide
Wed -- 07:01 AM EST     Sunrise
Wed -- 10:17 AM EST     0.62 feet Low Tide
Wed -- 11:05 AM EST     Moonrise
Wed -- 04:23 PM EST     8.46 feet High Tide
Wed -- 04:47 PM EST     Sunset
Wed -- 05:20 PM EST     First Quarter
Wed -- 10:40 PM EST     0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.25.26.98.28.88.36.853.21.60.712.54.56.27.68.48.27.15.33.620.80.6

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Wed -- 02:21 AM EST     -0.17 knots Slack
Wed -- 05:23 AM EST     -4.06 knots Max Ebb
Wed -- 07:01 AM EST     Sunrise
Wed -- 08:15 AM EST     0.01 knots Slack
Wed -- 11:05 AM EST     Moonrise
Wed -- 11:12 AM EST     3.85 knots Max Flood
Wed -- 02:34 PM EST     -0.06 knots Slack
Wed -- 04:47 PM EST     Sunset
Wed -- 05:20 PM EST     First Quarter
Wed -- 05:45 PM EST     -4.13 knots Max Ebb
Wed -- 08:41 PM EST     0.18 knots Slack
Wed -- 11:42 PM EST     3.96 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.72.91.5-2.2-3.4-4-3.9-3.1-1.42.43.43.83.731.9-1.7-3.1-3.9-4.1-3.6-2.41.63.13.8

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 (2,6,7,8)
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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.