Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Lynn, MA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:50AMSunset 7:34PM Saturday April 21, 2018 3:32 AM EDT (07:32 UTC) Moonrise 10:27AMMoonset 12:42AM Illumination 34% Phase: Waxing Crescent; Moon at 6 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- 116 Am Edt Sat Apr 21 2018
Rest of tonight..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Sat..NW winds 5 to 10 kt. Waves around 2 ft.
Sat night..NW winds 5 to 10 kt. Waves 1 foot or less.
Sun..NW winds 5 to 10 kt, diminishing to around 5 kt in the afternoon. Waves 1 foot or less.
Sun night..W winds around 5 kt, becoming nw around 5 kt after midnight. Waves 1 foot or less.
Mon..NW winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less.
Mon night..SW winds 5 to 10 kt. Waves 1 foot or less.
Tue..SW winds 5 to 10 kt. Waves 1 foot or less.
Tue night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of rain.
Wed..SE winds 5 to 10 kt. Waves around 2 ft. Rain likely.
Wed night..E winds 5 to 10 kt. Waves 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 116 Am Edt Sat Apr 21 2018
Synopsis for massachusetts and rhode island coastal waters.. High pressure will build over the waters this weekend lasting into Monday, then shifting offshore on Tuesday. Low pressure will move north along the eastern seaboard Tuesday night and Wednesday, lifting over the waters on Thursday. 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 Lynn, MA
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location: 42.45, -70.95     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 210722
afdbox
area forecast discussion
national weather service boston norton ma
322 am edt Sat apr 21 2018

Synopsis
High pressure building over the great lakes today moves east
over new england for Sunday and Monday, then off to the east
Tuesday. This will bring our area dry weather and gradually
rising temperatures. Wet and breezy weather forecast midweek.

Perhaps a late week lull before becoming dreary again next
weekend.

Near term until 6 pm this evening
High pressure over the great lakes with a diminishing pressure
gradient over southern new england. Sunshine will generate some
mixing, reaching to about 850 mb. Also today the models show a
weak shortwave moving through the northeast and supported by a
120 knot upper jet.

Morning temps at or below freezing will quickly recover this
morning. Winds in the mixed layer will support developing gusts
around 20 knots midday and afternoon. There is enough of a
gradient to maintain a west to northwest wind. Temperatures at
850 mb reach -2c to -4c, and when mixed to the surface this
would support MAX temps in the 50s.

Short term 6 pm this evening through 6 pm Sunday
As the high pressure moves overhead, winds will become light and
subsidence should make our skies clear. With dew points in the
20s, except 30-35 CAPE and islands, expect some areas away from
the coast will dip below freezing, the rest will be in the 30s.

The high maintains clear skies and light winds Sunday. This will
allow sea breezes along the coast late morning through
afternoon. Mixing will support MAX temps in the mid 50s to
around 60.

Long term Sunday night through Friday
* highlights...

- warm up thru early week, dry, watching for seabreezes
- wet, breezy midweek
- perhaps a reprieve Friday, possibly Saturday
- return of wet, dreary weather for the following weekend
* overview...

aleutian low focus. With maturation, immediate downstream
energy is cut off, westerlies dominate, polar air held n,
beginning influence via sub-tropical s-stream along isentropes.

However deepening toward occlusion, later death, strong warm sw
isentropic push into canada, ridge dominance, energy sheared s,
n-stream captured, slip of cooler air late week. However depth
in question given progressive atlantic plus s-stream influence.

Polar low dipping S following weekend, yet milder air infused
with transition into late-spring. While the eps progs anomalous
cool h85 temperatures into early may, outcomes may be dreary,
wet, cool, however not wintry.

Warming trend into early week, s-stream disturbance midweek, a
dip within preferred h5 trof pattern with sheared pacific energy
swept e, brief cool down beneath clouds, rain, breezy via
clipping jet streak. Lull possible Friday prior to a stronger
system for the following weekend, potentially cooler. Seemingly
ebb and flow, yet appears spring-like weather has finally
arrived. Forecast targets of opportunity discussed below.

* discussion...

Sunday night through Tuesday...

high pressure, light winds, monitoring: 1.) daytime sea-breezes
yielding sharp coastal-interior temperature gradients, 2.)
overnight radiational cooling, and 3.) when high pressure shifts
e allowing S SW warmer air (mainly Tuesday). Suppressing ridge
remaining in place, ascending cloud cover per approaching
midweek storm holds off, Tuesday is the warmer of the two. Put a
mention of frost. Per ma agricultural extension, some farmers
have already planted.

Midweek...

wet weather anticipated. S-stream clash with e-shear pacific
energy. Tightening thermal gradient along 290-310k isentropes, s
low-level jet streak response. Precipitable water push to 1.25
inches, h85 dewpoints to 10c, high freezing level heights,
sneaking instability of a few hundred joules kg. Sub-tropical
warm, moist conveyor belt with crux of front-end thump
Wednesday. S SW low-level inflow below mid-upper level diffluent
sw. Jet coupling. Moderate, possibly heavy rain not out of the
question, however uncertain magnitude of faster winds aloft
transferring to surface. Likely pops. Sneak in thunder. Lean
breezier conditions across interior.

Following weekend...

upstream ridge amplification, E CONUS trof reloads. Gyre of
cooler weather prevailing, cyclonic flow, moisture laden,
looking dreary, wet. Considerable spread in ensemble members
meteograms, pass on any further discussion other than trending
broadscale pattern.

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

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday ... High confidence.

Today... VFR. Patchy daytime clouds this afternoon, but with
bases above 4500 feet. Northwest winds with gusts around 20
knots midday and afternoon, diminishing by evening.

Tonight and Sunday... VFR. Mainly clear skies and winds less
than 20 knots. Developing sea breezes Sunday late morning and
afternoon.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Sunday night through Wednesday ... High confidence.

Sunday night:VFR. Patchy frost.

Monday through Monday night:VFR.

Tuesday:VFR. Breezy.

Tuesday night:VFR. Ra likely.

Wednesday: mainlyVFR, with local 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 Sunday ... High confidence.

Northwest winds gusting to 20 knots today, then lighter winds
tonight and Sunday. Seas remain below 5 feet through the
weekend.

Outlook Sunday night through Wednesday ... High confidence.

Sunday through Tuesday: winds less than 25 kt.

Tuesday night: winds less than 25 kt. Chance of rain.

Wednesday: low risk for small craft advisory winds with gusts
up to 25 kt. Local rough seas. Rain likely.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi45 min 1023.5 hPa
44013 - BOSTON 16 NM East of Boston, MA 17 mi43 min WNW 14 G 16 41°F 42°F2 ft1023 hPa (+0.0)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi89 min 40°F 41°F2 ft1021.8 hPa
IOSN3 - Isle of Shoals, NH 40 mi33 min WNW 15 G 17 40°F 1023 hPa (-0.0)29°F
BGXN3 - Great Bay Reserve, NH 43 mi108 min W 5.1 39°F 985 hPa31°F
44098 - Jeffrey's Ledge, NH (160) 48 mi57 min 41°F3 ft

Wind History for Providence, RI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA6 mi39 minWNW 1010.00 miA Few Clouds40°F27°F60%1024.4 hPa
Beverly, Beverly Municipal Airport, MA9 mi40 minWNW 610.00 miFair37°F27°F67%1023.5 hPa
Bedford, Hanscom Field, MA18 mi37 minSW 410.00 miFair34°F25°F70%1025.8 hPa
East Milton, MA19 mi37 minWNW 8 mi34°F26°F73%1025 hPa
Lawrence Municipal Airport, MA21 mi39 minWSW 510.00 miFair39°F27°F62%1024.8 hPa
Norwood, Norwood Memorial Airport, MA21 mi40 minS 310.00 miFair39°F28°F67%1024.7 hPa

Wind History from BOS (wind in knots)
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Last 24hrW13
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1 day agoSW6S3W6SW8SW9NW5CalmW7N3NW55W6W4W6W8NW14NW10W8NW12NW9NW11W13NW16
G20
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2 days agoW12W10W15
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W10W9W9W9W6W8SW6

Tide / Current Tables for Lynn, Lynn Harbor, Massachusetts
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Lynn
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Sat -- 12:41 AM EDT     Moonset
Sat -- 03:47 AM EDT     10.67 feet High Tide
Sat -- 05:53 AM EDT     Sunrise
Sat -- 10:10 AM EDT     -0.65 feet Low Tide
Sat -- 10:27 AM EDT     Moonrise
Sat -- 04:30 PM EDT     9.43 feet High Tide
Sat -- 07:32 PM EDT     Sunset
Sat -- 10:29 PM EDT     0.52 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.26.58.710.310.69.77.75.22.60.5-0.6-0.11.63.8689.39.38.16.34.12.10.70.7

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Sat -- 12:41 AM EDT     Moonset
Sat -- 12:56 AM EDT     0.48 knots Max Flood
Sat -- 04:32 AM EDT     -0.00 knots Slack
Sat -- 05:52 AM EDT     Sunrise
Sat -- 07:39 AM EDT     -0.39 knots Max Ebb
Sat -- 10:26 AM EDT     Moonrise
Sat -- 11:22 AM EDT     0.00 knots Slack
Sat -- 01:26 PM EDT     0.43 knots Max Flood
Sat -- 05:06 PM EDT     -0.00 knots Slack
Sat -- 07:32 PM EDT     Sunset
Sat -- 08:04 PM EDT     -0.32 knots Max Ebb
Sat -- 11:41 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.50.40.30.1-0.1-0.3-0.4-0.4-0.3-0.3-0.10.20.40.40.40.20-0.2-0.3-0.3-0.3-0.3-0.2

Weather Map and Satellite Images
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wmap_A
GOES 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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (3,6,7,8)
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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.