Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Salem, MA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:24AMSunset 6:52PM Tuesday September 17, 2019 7:10 AM EDT (11:10 UTC) Moonrise 8:48PMMoonset 9:30AM Illumination 89% Phase: Waning Gibbous; Moon at 18 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- 334 Am Edt Tue Sep 17 2019
Today..NE winds 10 to 15 kt. Waves 1 foot or less, then around 2 ft this afternoon.
Tonight..NE winds 5 to 10 kt. Waves 1 foot or less.
Wed..NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft.
Wed night..NE winds 5 to 10 kt. Waves around 3 ft in the evening, then 1 foot or less.
Thu..N winds 5 to 10 kt, becoming E in the afternoon. Waves 1 foot or less.
Thu night..SE winds around 5 kt, becoming sw after midnight. Waves 1 foot or less.
Fri..NW winds around 5 kt. Waves 1 foot or less, except 4 to 5 ft at the outer harbor entrance.
Fri night..W winds around 5 kt, becoming nw after midnight. Waves 1 foot or less, except up to 5 ft at the outer harbor entrance.
Sat..N winds 5 to 10 kt, becoming ne in the afternoon. Waves 1 foot or less, except 4 to 5 ft at the outer harbor entrance.
Sat night..S winds around 5 kt. Waves 1 foot or less, except 3 to 4 ft at the outer harbor entrance. 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 334 Am Edt Tue Sep 17 2019
Synopsis for massachusetts and rhode island coastal waters.. Large high pres will build slowly S across the waters by mid week, and remaining through Sat. 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 Salem, MA
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location: 42.53, -70.89     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 171059
afdbox
area forecast discussion
national weather service boston norton ma
659 am edt Tue sep 17 2019

Synopsis
Mild days and cool nights. The spot chance of a shower tonight
into Wednesday, otherwise a dry forecast. Warming up late week
into the weekend as dangerous surf and rip currents develop
along ocean facing beaches due to well offshore humberto. The
next best chance at any rainfall in the form of showers is
forecast for early next week.

Near term through tonight
7 am update (no major changes to the forecast)...

high pressure over eastern canada will be the dominant feature
for our weather today. Expecting a N to NE flow to develop,
with colder air being push across southern new england. Plenty
of sunshine today will take a bit of the edge off this colder
air. Slightly below normal high temperatures, lowest near the
immediate east coast, CAPE and islands.

Short term Wednesday
Onshore flow continues tonight into Wednesday. Colder air will
continue to flow into our region, with Wednesday probably being
the coldest day this week. As temperatures lower, expecting
marine stratus to develop and move onshore. The layer of higher
moisture content is rather shallow beneath a substantial
subsidence inversion. Temperature differential for ocean
enhancement is impressive for mid september. There may be a few
sprinkles to contend with tonight into Wednesday morning.

Long term Wednesday night through Monday
* highlights...

- mild days, cool nights through the week, dry throughout
- turning warmer over the weekend into next week
- next chance of rain may not be till early next week
* overview...

transitioning warmer? Mild days, cool nights through the week but by
the weekend into the following week we could see warmer than average
conditions. Positive teleconnections across the board minus the pna.

Wpo epo strongest into late september signaling a strong pacific jet
into western N america. Mid-latitude energy downsheared across the w
conus as a prominent mjo is forecast over the W hemisphere africa
(phase 1 8), the potential combination N atlantic tropical waves
latent heat release with favorable downstream E CONUS ridging from
an onshore mild pacific jet supports warmer than average conditions
advertised by CPC 6-10 8-14 day outlooks. All signs point towards
higher heights late september across new england. With that there
does not seem to be much rainfall opportunity. Ensembles showing out
through the rest of the month there's an sw-ne E CONUS axis into s
new england of less than an inch of total rainfall. Deterministic
forecast guidance highlights our next best chance of rainfall early
the following week. Looks like we're in store for a long period of
dry weather which is not atypical as september is one of more drier
months on average. Neither is warmer than average temperatures. A
glance back at records for late september, we've observed upper 80s
to low 90s for highs.

An ensemble blend forecast with lower certainty on specifics further
out in the forecast. Warming trend into the weekend as high pressure
shifts E and S SW winds prevail prior to a sweeping cold front early
the following week with a chance of showers. Could see a brief cool
down thereafter before warmer weather builds back in as we go into
autumn.

Aviation 12z Tuesday through Saturday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday ...

12z update (no major changes)...

today...

vfr. N wind becoming NE at 5 to 15 kt. Gusts up to 20 kt may
occur across the CAPE and islands by mid to late afternoon.

Few-sct 050.

Tonight and Wednesday...

mainlyVFR. A period of bkn 020-030 MVFR ceilings along with a
passing shra or two possible across portions of E ma tonight into
Wednesday morning. Lower MVFR possible along the high terrain down
to 010.

Kbos terminal...

high confidence in taf. 020 MVFR possible tonight into Wednesday.

Kbdl terminal...

high confidence in taf.

Outlook Wednesday night through Saturday ...

Wednesday night through Thursday:VFR. Breezy.

Thursday night through Saturday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday ... High confidence.

Today...

n NE wind gusts up to 20 knots. May see a few gusts approaching
25 knots across some of our southeast waters. Seas 2-4 ft.

Tonight and Wednesday...

ne wind gusts around 20 knots at times in the cool air advection
pattern. Gusts increasing up to around 25 kt Wednesday afternoon.

Seas increasing 3-5 ft by early Wednesday morning across the
open waters. Will need to consider small craft advisories with
later forecasts.

Outlook Wednesday night through Saturday ... Moderate confidence.

Wednesday night: low risk for small craft advisory winds with
gusts up to 25 kt. Areas of rough seas.

Thursday through Thursday night: winds less than 25 kt. Local
rough seas.

Friday through Friday night: winds less than 25 kt. Rough seas
up to 10 ft.

Saturday: winds less than 25 kt. Areas of rough seas.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 15 mi58 min 59°F 1018.6 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 17 mi126 min NNW 14 G 16 60°F 63°F1 ft1017 hPa
44013 - BOSTON 16 NM East of Boston, MA 18 mi80 min NNW 16 G 18 60°F 65°F3 ft1016.8 hPa (-0.0)51°F
IOSN3 - Isle of Shoals, NH 33 mi70 min NW 13 G 15 56°F 1017.4 hPa (-0.0)50°F
BGXN3 - Great Bay Reserve, NH 37 mi85 min Calm 46°F 1018 hPa46°F
CMLN3 39 mi186 min NW 4.1
44098 - Jeffrey's Ledge, NH (160) 43 mi32 min 64°F3 ft
44018 - SE Cape Cod 30NM East of Nantucket, MA 45 mi80 min NNW 14 G 16 61°F 3 ft1017.5 hPa (+0.5)51°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beverly, Beverly Municipal Airport, MA4 mi77 minWNW 710.00 miFair51°F45°F80%1017.4 hPa
Boston, Logan International Airport, MA13 mi76 minNW 810.00 miA Few Clouds59°F44°F58%1018.1 hPa
Lawrence Municipal Airport, MA18 mi76 minN 010.00 miFair49°F44°F83%1019 hPa
Laurence G Hanscom Field Airport, MA22 mi2.3 hrsWSW 310.00 miFair48°F43°F83%1019.2 hPa

Link to 5 minute data for KBVY

Wind History from BVY (wind in knots)
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Last 24hrNW5--NW12--NW12
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NW10----N4--N5NW3Calm------NW4--NW7NW7
1 day agoW5W6----W8W10W8
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W6W5W4W4--W4----CalmCalmCalm----
2 days agoS5S7S8S7S10S8S5SW7S8S7S6S5S5S6S5----------------W4

Tide / Current Tables for Beverly, Massachusetts
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Beverly
Click for Map
Tue -- 01:51 AM EDT     9.25 feet High Tide
Tue -- 06:25 AM EDT     Sunrise
Tue -- 07:52 AM EDT     0.55 feet Low Tide
Tue -- 09:30 AM EDT     Moonset
Tue -- 02:07 PM EDT     9.27 feet High Tide
Tue -- 06:50 PM EDT     Sunset
Tue -- 08:14 PM EDT     0.49 feet Low Tide
Tue -- 08:47 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.48.89.28.56.94.82.81.10.61.43.156.98.59.38.87.45.43.41.50.50.92.44.2

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Tue -- 02:32 AM EDT     -0.00 knots Slack
Tue -- 05:49 AM EDT     -0.34 knots Max Ebb
Tue -- 06:24 AM EDT     Sunrise
Tue -- 09:05 AM EDT     0.00 knots Slack
Tue -- 09:29 AM EDT     Moonset
Tue -- 11:15 AM EDT     0.43 knots Max Flood
Tue -- 02:53 PM EDT     -0.00 knots Slack
Tue -- 06:08 PM EDT     -0.36 knots Max Ebb
Tue -- 06:50 PM EDT     Sunset
Tue -- 08:47 PM EDT     Moonrise
Tue -- 09:32 PM EDT     0.00 knots Slack
Tue -- 11:36 PM EDT     0.41 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.1-0.1-0.2-0.3-0.3-0.3-0.3-00.30.40.40.40.2-0-0.2-0.3-0.4-0.3-0.3-0.20.10.4

Weather Map
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wmap_A
GEOS Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Boston, MA (7,2,3,4)
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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.