Monday, May22, 2017 L-36.com


Marine Weather and Tides
Revere, MA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:13AMSunset 8:08PM Monday May 22, 2017 5:30 PM EDT (21:30 UTC) Moonrise 3:29AMMoonset 4:16PM Illumination 8% 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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ANZ230 Boston Harbor- 415 Pm Edt Mon May 22 2017
Tonight..SW winds 5 to 10 kt. Waves around 2 ft. Areas of fog. Showers likely this evening. A chance of showers after midnight. Vsby 1 to 3 nm.
Tue..N winds around 5 kt...becoming E in the afternoon. Waves 1 foot or less. Areas of fog. Vsby 1 nm or less.
Tue night..E winds around 5 kt. Waves 1 foot or less. Patchy fog.
Wed..NE winds 5 to 10 kt. Waves 1 foot or less.
Wed night..E winds 5 to 10 kt. Waves 1 foot or less.
Thu..E winds 5 to 10 kt. Waves 1 foot or less. Showers likely. Vsby 1 to 3 nm.
Thu night..NE winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. Showers likely. Vsby 1 to 3 nm.
Fri..N winds 5 to 10 kt. Waves 1 foot or less. Patchy fog. Showers likely. Vsby 1 to 3 nm.
Fri night..NW winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Sat..N winds 5 to 10 kt. Waves 1 foot or less.
Sat night..S winds around 5 kt. Waves 1 foot or less. 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 415 Pm Edt Mon May 22 2017
Synopsis for massachusetts and rhode island coastal waters.. A cold front will move across the waters Tuesday morning. A series of low pres systems will track near the waters late Tuesday into Friday with periods of unsettled weather. 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 Revere, MA
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location: 42.44, -71.01     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 222051
afdbox
area forecast discussion
national weather service taunton ma
451 pm edt Mon may 22 2017

Synopsis
Showers will cross through southern new england this evening, with
the most numerous showers affecting ri, northern ct, and ma south of
the mass pike. A weak but moisture rich area of low pressure will
likely keep showers in the vicinity of ri and southeast ma overnight
and even into Tuesday morning on the CAPE and islands. Low pressure
will pass south of new england, bringing scattered showers
Tuesday night into Wednesday. Weak high pressure brings a brief
period of dry but seasonable conditions. Another stronger low
moves northeast out of the ohio valley, bringing more showers
Thursday and Friday. The low shifts to the gulf of maine
Saturday, so will see mainly dry conditions. Another weather
system may approach late Sunday or memorial day with another
period of showers possible.

Near term /until 6 am Tuesday morning/
Tonight... Radar at 430 pm showed scattered showers north of the ma
pike, with more numerous showers to the south. Showers will continue
to overspread much of southern new england over the next few hours
while a short wave traverses the region. Precipitation continues
overnight due to the approach and passage of a cold front, and a
wave of low pressure that develops to our southwest. Models showing
the wave developing near the mid atlantic region. The low then
tracks northeastward with the center passing southeast of nantucket
on Tuesday.

Across interior southern new england, the passage of the cold front
will bring a wind shift to the NW around and after midnight, with
drier air moving in and diminishing chances for rain. However, it is
a different story across the southeast portion of our area.

Precipitable water increases to the east of the cold front tonight,
potentially placing southeast ma in the vicinity of 1.5+ inch
pwats late tonight into Tuesday morning. In addition, models are
showing at least a modest low level jet affecting southeast ma,
especially the CAPE and islands. NAM is the most robust with
the LLJ peaking at 40-45 knots. Also k indices in the low 30s
support the chance for thunder in the vicinity of ri and
southeast ma as well. So in this area rain chances continue
right thru daybreak. CAPE and islands could see an inch or so of
rainfall.

To the north and west of ri/southeast ma, while precip chances will
be diminishing overnight, low level moisture trapped under a
developing subsidence inversion will likely allow for areas of fog
and possibly low clouds.

Temps continue to look tricky thanks to the risk for clearing in the
far NW interior. Some cooling there could allow temps to drop back
into the 40s while areas further E remain nearly steady in the low
to mid 50s.

Short term /6 am Tuesday morning through Tuesday night/
Tue...

away from southeast ma, expect improving conditions with decreasing
clouds and a north wind, primarily under the influence of weak high
pressure. However models are showing the potential for the offshore
low pressure to cross southeast of nantucket during Tuesday, and
showers associated with it may linger in portions of southeast ma
during the day. With high pwats near the cape/islands in the
morning, could see a continuation of moderate or brief heavy
rainfall early in the day.

Forecast high temps reflect the anticipated difference in conditions
along the cape/islands, and elsewhere across the region. Highs 70 to
75 should be common for much of the area, with somewhat cooler temps
along east coastal ma and south coastal ma/ri where sea breezes
would keep temps a bit lower. Across the CAPE and islands, thinking
highs will be in the upper 50s to mid 60s, warmest near the canal.

Tuesday night...

models showing next chance for rain with another wave of low
pressure. It appears the low center will pass well southeast of
nantucket, but cloudiness may stretch into interior southern new
england. Have primarily chance pops for portions of northern ct, ri,
and southeast ma remainder of the region especially along and north
of the ma pike likely remains dry. However there may still be some
changes to the pops as we get closer to Tuesday night, depending on
if this low tracks closer to our area or looks to stay offshore.

Long term /Wednesday through Monday/
Highlights...

* scattered showers Wed morning, then drying out
* next area of showers late Wed night, continuing through fri
* may see another weather system approach late this weekend or
memorial day with more showers possible
details...

Wednesday...

12z model suite continues to push low pressure further off the s
coast, but northern edge of precip shield looks to bring scattered
showers mainly across south coastal areas, with a few spotty showers
possible further inland through about midday Wednesday. As the low
pushes further offshore, precip will taper off, though a few might
linger across the E slopes of the berkshires into Wed night. Some
sun may break through Wed afternoon across portions of the interior,
but a persistent onshore wind will keep clouds lingering near the
coast. High temps will range from the 60-65 degree range along e
coastal areas to the mid-upper 70s across the ct valley.

Thursday and Friday...

h5 cutoff low pres and associated long wave trough will shift ne
during this timeframe. The low rotates across the region during
Friday. Another area of precip will work up the eastern seaboard
thu, bringing another batch of rainfall. Big question will be
whether another surface low develops off the mid atlantic coast and
shifts NE late thu/thu night, which could enhance the precip. Have
noted some elevated instability with moderate lapse rates, but with
stable conditions in the lower levels, do not expect convection at
this point but something to keep an eye on. The precip shield should
start to lift NE Fri night.

Forecasted QPF amounts from 0.7 to 1.25 inches possible from thu
afternoon through fri. Will also see steady easterly winds, which
will keep cool and damp conditions in place, along with patchy fog
developing each night.

Holiday weekend...

have lower confidence during this timeframe due to model solution
spread in bringing h5 short wave eastward out of the great lakes,
with a possible weak low and front developing across the mid
atlantic states.

At this point, the low pushes eastward by Saturday, so will see some
drying conditions though can not completely rule out a few spotty
showers Sat afternoon across the interior. Big question will be
possible development and movement of low pressure from the mid
atlantic states eastward for late this weekend into memorial day.

Have carried chance pops for both Sun and mon, though temperatures
look seasonal.

Aviation /21z Monday through Saturday/
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term /through Tuesday night/...

430 pm update...

late this afternoon and evening... Moderate confidence, mainly due to
some uncertainty in timing. CIGS mfr or dropping to MVFR late
afternoon with localized lower vsbys with numerous shra. Cigs
dropping to ifr between 22z and 03z across much of the area, though
these lower CIGS may hold off across cape/islands and vicinity
until later tonight. Winds se/e.

Overnight... Moderate confidence.

Ifr/MVFR with low cigs/fog/shra mainly S and E of a line from hfd-
orh-psm, meanwhile some improvement is possible N and W of this line
especially during the early morning hours. Otherwise a damp night.

Some s-sw winds gust 20-25 kt mainly cape/islands. Otherwise, winds
shift to the NW by sunrise tue.

Tue... Moderate confidence.

Improvement toVFR most locales during the morning. Ifr conditions
in shra may linger during Tue across cape/islands. Sea breezes
possible on coastlines.

Kbos taf... High confidence in TAF trends, lower confidence in exact
timing for the lower categories this afternoon and evening.

Sct showers in kbos vicinity this afternoon, with showers becoming
more likely for this evening.

Kbdl taf... High confidence in TAF trends, lower confidence in exact
timing for the lower categories. Showers in vicinity of kbdl this
afternoon (mainly to the s), becoming more numerous towards/after
21z. Additional showers probable this evening.

Tue night... Moderate confidence.VFR except MVFR possible south
coast in risk of showers.

Outlook /Wednesday through Saturday/...

moderate confidence through the period.

Wednesday... MainlyVFR. May see periods of MVFR-ifr vsbys in patchy
fog Wed night along the S coast, CAPE cod and the islands. MVFR-ifr
cigs after midnight moving from s-n in low stratus and scattered
showers.

Thursday... MVFR to local ifr conditions in showers. Areas of fog
developing Thu night with ifr vsbys.

Friday... Mainly ifr vsbys in patchy early morning fog, improving to
vfr. MVFR CIGS linger in low clouds and scattered showers, ending
from s-n late Fri and Fri night.

Saturday... Patchy early morning fog along the coast and across n
central mass, improving by mid-late morning. OtherwiseVFR. May see
isold showers across portions of interior central and N mass around
midday or early afternoon.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term /through Tuesday night/...

tonight... Moderate confidence. During this evening, showers will
become more numerous, combining with stronger southerly winds
reaching around 25 kt this evening/tonight. While seas should
generally remain at or below 5 ft, continuing a small craft advisory
for these winds thru tonight until the winds shift to the w-nw
tomorrow morning. These will mainly be for the open waters, rather
than the sheltered bays/sounds. Fog/showers will reduce visibility
mainly late this afternoon through the overnight.

Tomorrow... High confidence.

Gradual improvement across the waters expected, though showers may
linger thru the day in the vicinity of cape/islands and east. Winds
and seas will remain below small craft advisory thresholds. Winds
may gust to 25 kt early on the eastern outer coastal waters.

Tuesday night... Moderate confidence.

Weak wave of low pres tracks just south of new england Tue night and
wed morning. Winds/seas expected to remain below SCA thresholds for
this period.

Outlook /Wednesday through Saturday/...

Wednesday... Moderate confidence. Low pres passes across or just S of
the southern waters. E-ne winds 15-20 kt on the outer waters with
seas up to 5-6 ft. Visibility restrictions in patchy fog Wed night.

Thursday... Moderate confidence. Persistent e-ne wind gusting up to
20 kt on the outer waters with seas up to 5-6 ft. Winds shift to se-
s Thu night and diminish but seas remain at or above 5 ft on the
outer waters and the southern near shore waters. Visibility
restrictions in morning and nighttime fog and areas of showers.

Friday and Saturday... Low to moderate confidence. Winds shift to nw
fri afternoon/evening. Gusts up to 25 kt on the southern outer
waters during the afternoon/evening. Seas remain at or above 5 ft,
highest on the southern outer waters. Visibility restrictions in
early morning and nighttime patchy fog. Scattered showers early
fri.

Tides/coastal flooding
High astronomical tides will occur over several tide cycles along
eastern massachusetts coast from Thursday into memorial day, with
tides around 12 feet in boston and 4 feet on nantucket.

At the very least, minor nuisance flooding will occur in the most
vulnerable locations such as morrissey blvd in boston. Any surge on
top of these tides would lead to more widespread, but minor,
coastal flooding, including on nantucket. Right now, this looks
to be a possibility Thursday into Friday due to expected onshore
winds. Model surge guidance (estofs) shows a potential 0.6 ft
surge, which would give a storm tide near 13 feet Thursday
night in boston and just under 5 ft on nantucket.

Box watches/warnings/advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 8 pm this evening to 8 am edt
Tuesday for anz231-232.

Small craft advisory from 8 pm this evening to 4 am edt
Tuesday for anz233-234.

Small craft advisory until 4 am edt Tuesday for anz235-237-256.

Small craft advisory until 8 am edt Tuesday for anz250-254-255.

Synopsis... Evt/nmb
near term... Nmb
short term... Nmb
long term... Evt
aviation... Evt
marine... Evt/nmb
tides/coastal flooding... Jwd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 6 mi43 min 56°F 54°F1018.1 hPa
44013 - BOSTON 16 NM East of Boston, MA 20 mi41 min SE 9.7 G 14 53°F 55°F1 ft1017.9 hPa (-2.2)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 24 mi87 min SE 9.7 G 14 52°F 54°F2 ft1019 hPa
IOSN3 - Isle of Shoals, NH 42 mi31 min SSE 17 G 18 48°F 1018.6 hPa (-2.1)47°F
BGXN3 - Great Bay Reserve, NH 44 mi106 min SE 2.9 49°F 1020 hPa47°F
FOXR1 - 8454000 - Providence, RI 48 mi43 min S 8 G 9.9 52°F 60°F1017.5 hPa
PVDR1 49 mi43 min SE 9.9 G 13 52°F 1017.8 hPa51°F

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, MA4 mi37 minS 1110.00 miOvercast55°F48°F80%1018.1 hPa
Beverly, Beverly Municipal Airport, MA11 mi38 minSE 810.00 miOvercast53°F48°F86%1017.6 hPa
Bedford, Hanscom Field, MA15 mi35 minE 510.00 miOvercast53°F46°F77%1018.9 hPa
East Milton, MA17 mi95 minSSE 9 mi52°F46°F80%1019.5 hPa
Norwood, Norwood Memorial Airport, MA19 mi38 minSSE 710.00 miOvercast54°F48°F80%1018.1 hPa
Lawrence, Lawrence Municipal Airport, MA21 mi37 minESE 310.00 miOvercast53°F48°F86%1018.9 hPa

Wind History from BOS (wind in knots)
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Last 24hrE12E12SE10SE8S7S10SW7SW9SW7SW9SW5SW6SW8SW6S8S7S9S7
G16
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1 day agoE9E10SE6SE6S9SW7S6SW8W9SW7SW6N3NE4N4NE9NE11E10E9E10E10E12E13E13E11
2 days agoNW16N13
G20
--NW12
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G18
N10N12N8N7N8NE5N8N8N10NE14NE13E13E13E16E12SE12E11E10E9

Tide / Current Tables for Lynn Harbor, Massachusetts
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Lynn Harbor
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Mon -- 02:41 AM EDT     0.41 feet Low Tide
Mon -- 03:29 AM EDT     Moonrise
Mon -- 05:15 AM EDT     Sunrise
Mon -- 08:54 AM EDT     9.53 feet High Tide
Mon -- 03:03 PM EDT     0.07 feet Low Tide
Mon -- 04:16 PM EDT     Moonset
Mon -- 08:06 PM EDT     Sunset
Mon -- 09:20 PM EDT     10.27 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.42.30.80.51.63.45.47.599.58.87.152.80.90.10.82.64.87.19.110.2108.6

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Mon -- 02:41 AM EDT     0.00 knots Slack
Mon -- 03:29 AM EDT     Moonrise
Mon -- 04:53 AM EDT     1.27 knots Max Flood
Mon -- 05:15 AM EDT     Sunrise
Mon -- 08:22 AM EDT     -0.00 knots Slack
Mon -- 11:48 AM EDT     -1.22 knots Max Ebb
Mon -- 03:03 PM EDT     0.00 knots Slack
Mon -- 04:16 PM EDT     Moonset
Mon -- 05:22 PM EDT     1.39 knots Max Flood
Mon -- 08:05 PM EDT     Sunset
Mon -- 08:52 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1.1-0.60.31.11.31.20.90.3-0.4-0.9-1.2-1.2-1.2-0.9-0.10.91.41.41.20.7-0.1-0.7-1.1

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 (17,4,5,8)
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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.