Monday, June26, 2017 L-36.com


Marine Weather and Tides
Lynn, 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 5:06AMSunset 8:26PM Monday June 26, 2017 11:44 PM EDT (03:44 UTC) Moonrise 8:03AMMoonset 10:35PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 1019 Pm Edt Mon Jun 26 2017
Overnight..SW winds 5 to 10 kt. Seas 1 foot or less. A slight chance of showers with isolated tstms late this evening.
Tue..S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas around 2 ft. A chance of showers.
Tue night..W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft. A chance of showers.
Wed..W winds around 5 kt. Seas 1 foot or less.
Wed night..W winds around 5 kt. Seas 1 foot or less.
Thu..SW winds around 5 kt, increasing to 10 to 15 kt with gusts up to 25 kt in the afternoon. Seas 1 foot or less. A chance of showers.
Thu night..SW winds around 10 kt. Gusts up to 25 kt in the evening. Seas 1 foot or less. Showers likely with a chance of tstms.
Fri..SW winds 5 to 10 kt with gusts up to 25 kt. Seas around 2 ft. A chance of showers and tstms.
Fri night..SW winds 5 to 10 kt with gusts up to 20 kt. Seas 1 foot or less. A chance of showers and tstms.
Sat..S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers and tstms.
Sat night..SW winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. 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 1019 Pm Edt Mon Jun 26 2017
Synopsis for massachusetts and rhode island coastal waters.. A series of weak cold fronts will move across the waters through Tue evening. High pres builds south of the waters Wed. A warm front will lift north through new eng Thu with gusty sw winds developing late Thu into Fri and lasting 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 Lynn, MA
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location: 42.45, -70.95     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 270147
afdbox
area forecast discussion
national weather service taunton ma
947 pm edt Mon jun 26 2017

Synopsis
An active strong jet stream will move across new england
tonight and Tuesday, bringing a few showers and isolated
thunderstorms. The greater threat will be on Tuesday. A warming
trend begins for the latter half of the week with a return to
summer heat and humidity Friday and Saturday. A warm front may
bring some showers and some thunderstorms Thursday night, with
more showers and thunderstorms possible Friday through the
weekend.

Near term until 6 am Tuesday morning
945 pm update...

scattered showers with isolated thunder across northern ma into
ny state continue to show a weakening trend given the loss of
daytime heating. However modest mid level lapse rates of 6-6.5
c km combined with 40-50 kt 0-6km deep layer shear will maintain
showers and t-storms over ny and likely clip northwest ma later
this evening and early overnight hours. Farther to the southeast
into ct ri and southeast ma weaker lapse rates and less jet
support precluding shower t-storm development. Thus dry weather
prevails. Previous forecast capturing these trends nicely so no
major changes with this forecast update.

Short term 6 am Tuesday morning through Tuesday night
Sharp shortwave over the great lakes today moves through the
cyclonic flow. One part ejects across ny and northern new
england Tuesday afternoon evening, while the main portion
crosses our area late Tuesday night or Wednesday morning.

We remain on the edge of the cold pool Tuesday, but close enough
to expect mid level lapse rates of 6.5 to 7c km during the
afternoon and early night. Going along with this will be totals
in the lower 50s and LI values below zero, as well as sbcape
values of 500-1000 j kg. Theta-e values show a ridge over ct
during the afternoon evening. Expect scattered showers tstms
during the afternoon and early night.

Winds aloft show some support for a few strong or damaging
storms. Winds at 850 mb will be 20-30 knots during Tuesday
afternoon, although this is forecast to move offshore by
evening. Winds at 500 mb are forecast at 50-60 knots during
Tuesday afternoon, but also move offshore by evening. Timing of
this wind and of the shower TSTM development may be the
determining factor in how strong these storms may get. The mixed
layer is expected to reach near 850 mb, where winds as noted
above will be 20 to 30 knots. Our forecast includes gusts on the
lower half of that range, but slightly higher values are
possible.

With the main shortwave moving through during Tuesday night, and
with the upper cold pool moving overhead, expect a continued
chance of showers storms Tuesday night.

If mixing reaches 850 mb it will work on temps of 8-10c, which
suggests MAX sfc temps of 75 to 80. If mixing GOES a little
higher, such as to 800 mb, then MAX sfc temps would be more
centered around 80. No change in the airmass Tuesday night
compared with tonight, so expect similar min temps.

Long term Wednesday through Monday
Highlights...

* pleasant Wednesday with low risk of a shower
* heat and humidity return Friday thru Sunday
* thunderstorm chances increase Thursday night through Sunday
details...

Wednesday...

an area of high pressure passes to our south, and model soundings
show quite dry airmass in place with precipitable water around 0.75
inch. Models show a short wave moving thru the area, then modest mid
level ridging develops later in the day. Anticipating development of
diurnal cumulus clouds, overall partly to mostly sunny skies.

Guidance continues to show very little QPF on Wednesday. Can't rule
out a few pop-up showers during the afternoon since low level lapse
rates are steep, however for much of the area, the day should stay
dry. Highs mainly in the 70s with dew points dropping to 45-50 in
the afternoon.

Dry conditions expected Wednesday night with any isolated diurnal
showers coming to an end early. Winds aloft will begin to turn more
to the southwest by Wednesday night with warm air advection, which
should bring some increase in clouds. Overnight lows mainly upper
50s to low 60s.

Thursday...

surface high pressure slides offshore, meanwhile low pressure
tracking east thru the great lakes region pushes a warm front
northeastward across southern new england. As we end up in the warm
sector, increasing heat and humidity will occur. Increasing moisture
will result in more clouds, and the potential for showers and
thunderstorms. Highest probability for precipitation would be across
the northern half of our area, continuing with likely pops there.

Chance pops further to the south. Could see gusty winds with any
thunderstorms and or if Sun breaks out for awhile and allows good
mixing, potential gusts 25 to 30 mph or so.

With zonal flow and both 850mb isotherms and winds becoming
parallel, appears that any convection that generates across upstate
ny could track eastward into southern new england. Will continue the
chance for showers thunderstorms into Thursday night. More abundant
cloud cover coupled with high surface dew points will keep lows in
the 60s.

Friday thru Sunday...

continue to anticipate an unsettled weather pattern for this
timeframe, influenced by broad upper trough to near zonal flow, with
periodic short waves passing thru our area, and areas of surface low
pressure moving thru the flow and to our north. Southern new england
remains in the warm sector until later Sunday, with heat and
humidity. Models continue to indicate during Fri night Saturday that
a back door cold front should remain to our north. Thus the
potential for 90 degree high temps returns for both Friday and
Saturday. Chance for showers and thunderstorms each day. Difficult
to place the exact timing and location of any strong storms during
Friday and Saturday.

During Sunday models indicate a cold front pushing thru the area,
which would be a trigger additional showers and thunderstorms.

The potential for strong thunderstorms appears possible each day
during this period. One caveat to watch is the subtropical ridge. If
this ridge moves closer, it may keep portions of the area dry.

Monday...

with cold front possibly to the east, drier airmass should build
into the area. Some uncertainty here whether the day is dry or
whether a short wave can bring some diurnal showers to the area.

Will have slight chance to low chance pops.

Aviation 02z Tuesday through Saturday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

945 am update...

showers and isolated thunderstorms will continue to weaken late
this evening across northern ma into ny state. Previous
discussion below.

=============================================================
short term through Tuesday night ... High confidence.

Tonight...

vfr. Scattered to broken cumulus with bases 6000-7000 feet this
evening, then diminishing cloud cover. Scattered showers and
isold t-storms in the interior, mainly along north of the mass
pike. Showers and tstms should diminish during this evening, but
can't rule out isolated showers past 04z.

Tuesday...

vfr. Scattered to broken cumulus with bases 5000-6000 feet.

Scattered showers and thunderstorms expected from midday through
the first part of Tuesday night. Showers and storms may bring
briefly lower conditions, mainly vsbys 3-5 miles in heavier
showers. Southwest winds will gust to at least 20 knots and
possibly as high as 30 knots.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Wednesday through Saturday ...

Thursday... Moderate confidence. MainlyVFR. Afternoon showers
possible in the interior with showers t-storms possible all sne thu
night. Gusty SW winds to 25-30 kt developing.

Friday... Moderate confidence. Patchy early morning stratus and fog,
especially south coastal ma ri, with local MVFR. ThenVFR, except
local ifr in possible thunderstorms, mainly during the afternoon and
evening hours.

Saturday... Moderate confidence.VFR, except local ifr in possible
thunderstorms, mainly during the afternoon and evening hours. Also
ifr ceilings fog possible south coastal ma ri.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday night ... High confidence.

Winds and seas mostly below small craft advisory thresholds
through the period with SW flow. A few gusts to 20 knots
expected with potential for a few gusts to 25 knots especially
nearshore.

Outlook Wednesday through Saturday ...

Wednesday... High confidence. Winds and seas below sca. Gusts to 20
kt possible nearshore waters and along southern outer coastal
waters.

Thursday... Moderate confidence. Small craft advisories will likely
be needed. Increasing and persistent SW winds with gusts around 25
kt probable, and gusts 30 kt possible, especially over nearshore
waters. Building seas may reach 5 to 7 ft over southern outer
coastal waters Thu night.

Friday... Moderate confidence. Persistent SW winds continue, with
potential gusts 25-30 kt. Seas of 5 to 7 feet may linger on the
southern outer coastal waters. Scattered thunderstorms, some with
reduced visibilities and strong gusty winds.

Saturday... Moderate confidence. SW S winds continue, with gusts 20-
25 kts. Seas 4-6 feet may linger on outer coastal waters.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Wtb nmb
near term... Wtb nocera nmb
short term... Wtb
long term... Nmb
aviation... Wtb nocera nmb
marine... Wtb nmb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi45 min 70°F 1014.6 hPa (+1.7)
44013 - BOSTON 16 NM East of Boston, MA 17 mi55 min WSW 5.8 G 7.8 66°F 59°F1 ft1015 hPa (+1.0)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi101 min NW 1.9 G 3.9 64°F 60°F1 ft1014.2 hPa
IOSN3 - Isle of Shoals, NH 40 mi45 min W 12 G 13 65°F 1014.8 hPa (+0.7)53°F
BGXN3 - Great Bay Reserve, NH 43 mi60 min W 2.9 66°F 1016 hPa55°F
44098 - Jeffrey's Ledge, NH (160) 48 mi39 min 57°F2 ft

Wind History for Providence, RI
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N6
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA6 mi51 minWNW 910.00 miMostly Cloudy69°F52°F55%1015.6 hPa
Beverly, Beverly Municipal Airport, MA9 mi52 minWSW 410.00 miMostly Cloudy64°F54°F70%1014.9 hPa
Bedford, Hanscom Field, MA18 mi1.8 hrsNW 410.00 miMostly Cloudy64°F53°F68%1016.3 hPa
East Milton, MA19 mi49 minNNW 8 mi64°F51°F63%1016.7 hPa
Lawrence Municipal Airport, MA21 mi51 minWNW 610.00 miPartly Cloudy66°F55°F70%1016.4 hPa
Norwood, Norwood Memorial Airport, MA21 mi52 minNW 510.00 miMostly Cloudy68°F54°F61%1015.5 hPa

Wind History from BOS (wind in knots)
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Last 24hrW7W7W8W8W9W9W9W9W7W12W13
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W12SW9
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S10SW14NE5NW9
1 day agoW12W10W10W6W8W8W8W10W8W8W10
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2 days agoSW8S10SW10S12S10S11SW12SW11S7S11SW9S5SW9SW9W11W11
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W13W12

Tide / Current Tables for Lynn, Lynn Harbor, Massachusetts
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Lynn
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Mon -- 01:11 AM EDT     11.86 feet High Tide
Mon -- 05:08 AM EDT     Sunrise
Mon -- 07:31 AM EDT     -1.84 feet Low Tide
Mon -- 08:03 AM EDT     Moonrise
Mon -- 01:52 PM EDT     10.45 feet High Tide
Mon -- 07:47 PM EDT     -0.56 feet Low Tide
Mon -- 08:25 PM EDT     Sunset
Mon -- 10:35 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.811.811.39.56.83.50.4-1.6-1.6-0.12.35.17.99.910.49.67.75.12.30.1-0.50.72.95.6

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Mon -- 01:59 AM EDT     -0.00 knots Slack
Mon -- 05:07 AM EDT     Sunrise
Mon -- 05:58 AM EDT     -0.49 knots Max Ebb
Mon -- 08:03 AM EDT     Moonrise
Mon -- 08:36 AM EDT     0.00 knots Slack
Mon -- 11:47 AM EDT     0.50 knots Max Flood
Mon -- 02:35 PM EDT     -0.00 knots Slack
Mon -- 06:35 PM EDT     -0.43 knots Max Ebb
Mon -- 08:24 PM EDT     Sunset
Mon -- 08:57 PM EDT     0.00 knots Slack
Mon -- 10:34 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.3-0-0.2-0.4-0.5-0.5-0.4-0.20.20.40.50.50.40.2-0.1-0.3-0.4-0.4-0.4-0.300.30.5

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (23,6,7,8)
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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.