Friday, May24, 2019 L-36.com


Marine Weather and Tides
Nahant, MA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:12AMSunset 8:08PM Friday May 24, 2019 9:59 PM EDT (01:59 UTC) Moonrise 12:30AMMoonset 10:12AM Illumination 65% Phase: Waning Gibbous; Moon at 21 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- 937 Pm Edt Fri May 24 2019
Overnight..NE winds 5 to 10 kt, becoming nw. Waves around 2 ft late this evening, then 1 foot or less.
Sat..NW winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less.
Sat night..S winds 5 to 10 kt. Gusts up to 20 kt after midnight. Waves around 2 ft. A chance of showers in the evening, then showers after midnight.
Sun..SW winds 5 to 10 kt. Gusts up to 20 kt in the morning. Waves around 2 ft in the morning, then 1 foot or less. A chance of showers in the morning with vsby 1 to 3 nm.
Sun night..NW winds around 5 kt. Waves 1 foot or less.
Mon..N winds 5 to 10 kt, becoming ne in the afternoon. Waves 1 foot or less.
Mon night..E winds around 5 kt, becoming ne after midnight. Waves 1 foot or less. A chance of showers after midnight.
Tue..SE winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Tue night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Wed..W winds 5 to 10 kt, becoming se in the afternoon. Waves 1 foot or less. A chance of showers and tstms.
Wed night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers and tstms. Winds and waves 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 937 Pm Edt Fri May 24 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres builds across new england overnight, then will cross the waters Sat. Another cold front moves across the waters Sat night, with another weak system moving across late Sunday. High pres builds across on Mon, with another system approaching Tue. 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 Nahant, MA
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location: 42.44, -70.94     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 250130
afdbox
area forecast discussion
national weather service boston norton ma
930 pm edt Fri may 24 2019

Synopsis
High pressure builds in from the west overnight. Dry and nice
weather is on tap for Saturday afternoon, but a fast moving
disturbance will bring a period of showers and perhaps a few
embedded thunderstorms mainly overnight Saturday. Aside from a
possible isolated thunderstorm Sunday, the rest of the holiday
weekend looks warm and dry, showers and cooler temperatures
return Tuesday ahead of a warm front approaching from the south.

Scattered showers and storms are expected Thursday as a cold
front crosses the region.

Near term until 6 am Saturday morning
930 pm update...

winds have decoupled from bl across much of sne, but remain a
bit gusty over CAPE islands. Winds will diminish here and
become light by midnight. Otherwise, cloud cover across sne
will break up with clearing overnight. Low temperatures by
daybreak should drop into the 40s to around 50.

Short term 6 am Saturday morning through Saturday night
Saturday...

high pressure sinks south of the region on Saturday, but still will
be in control of our weather for most of the day. Plenty of
sunshine and a dry airmass in place should allow for afternoon highs
to reach well into the 70s in most locales along with much less wind
then today. Sea breezes along the coast will hold highs mainly in
the middle to upper 60s on most beaches. We should see an increase
in mid high level cloudiness during the afternoon from west to east
ahead of an approaching shortwave. Dry weather should prevail, but
can not rule out a few showers developing toward evening in
northwest ma.

Saturday night...

approaching shortwave energy will induce a modest southwest llj
along with a burst of elevated instability. This should result in a
period of showers along with the potential for a few embedded
thunderstorms with some marginal elevated instability. Appears the
greatest risk for a period of showers will be late Saturday night
and into the overnight hours. Low temperatures should mainly be in
the 50s.

Long term Sunday through Friday
Updated 345 pm Friday.

Highlights...

* warm and mainly dry Sun and memorial day.

* cooler with showers likely tue.

* warmer later next week with scattered showers storms thu.

Sne should remain on the northern periphery of subtropical ridge
into next week as series of northern stream short waves move through
region bringing rounds of showers storms every few days.

What looked to be a significant warmup by the middle of next week
now appears to be on hold as surface boundary remains south of
region and GEFS eps probabilities confine more significant heat and
humidity well to our south. Still looks seasonable for late may by
end of next week however.

Sunday...

short wave moves offshore in morning which will take any lingering
showers and cloudiness with it. Sunshine will help temps reach low
to mid 80s inland which will result in decent instability Sunday
afternoon ahead of weak cold front. Depending on your model of choice,
capes increase to 500-1500 j kg, mid level lapse rates reach
6-7c km, and 0-6km shear is strong at 40-50kt. However a
significant limiting factor is drying aloft which should prevent
widespread storm development. Our thinking is we may see a few
storms develop which could produce strong wind gusts.

Monday...

front moves offshore with high pressure building north of region,
resulting in plenty of sunshine along with cooler temperatures and
low humidity. Expect highs to stay in 60s along immediate coast
where gradient should weaken enough to allow for coastal sea
breezes. Inland highs will reach 70s to near 80.

Tuesday through Thursday...

cooler wet day Tuesday as warm front approaches and probably stays
sw of region with decent onshore flow in place. Keeping highs in 60s
per model consensus but it's certainly possible for coastal
locations to hold in 50s. Although confidence decreases beyond
Tuesday due to timing issues with short waves, pattern favors warm
sector conditions Wednesday and Thursday, although cloudiness should
keep highs in 70s Wednesday and in 80s Thursday as main core of
heat humidity remains well south of region. Cold front should bring
at least scattered showers storms Thursday.

Aviation 01z Saturday through Wednesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ...

2330z update...

tonight... High confidence inVFR conditions. Northerly wind gusts
of 25 to 35 knots diminish early this evening, although will persist
a bit longer across the islands where some 40 knot gusts are
anticipated. These winds should diminish as well though as high
pressure builds in from the west by mid to late evening.

Saturday... High confidence inVFR conditions. South to southwest
winds of 5 to 15 knots with sea breezes developing by afternoon
along portions of the coast, especially across eastern ma.

Saturday night... Moderate confidence. VFR conditions should
deteriorate to MVFR thresholds from west to east with even some
brief localized ifr conditions. This a result of a period of
showers with perhaps an isolated thunderstorm or two mainly during
the late evening and overnight hours.

Kbos terminal... High confidence in taf. Ese sea breeze should
develop by lunch time on Saturday.

Kbdl terminal... High confidence in taf.

Outlook...

Sunday: mainlyVFR, with local MVFR possible. Breezy. Slight
chance shra, slight chance tsra.

Sunday night through memorial day:VFR.

Monday night:VFR. Chance shra.

Tuesday: mainlyVFR, with local MVFR possible. Chance shra.

Wednesday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Saturday night ...

930 pm update...

tonight... High confidence.

Winds are diminishing. Still some SCA gusts over SE waters, but
these winds will become light overnight as high pressure
builds in from the west.

Saturday... High confidence. High pressure sinks to our south but
will keep winds seas below small craft advisory thresholds.

Saturday night... Moderate to high confidence. Modest southwest llj
developing should result in some 20 to 25 knot wind gusts and 3 to 5
foot seas developing. Some small craft headlines might be needed.

Outlook...

Sunday: winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers, slight chance of thunderstorms.

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

Memorial day: winds less than 25 kt. Seas locally approaching
5 ft.

Monday night: winds less than 25 kt. Slight chance of rain
showers.

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

Wednesday: winds less than 25 kt. Seas locally approaching 5 ft.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 1 am edt Saturday for anz232-
254>256.

Small craft advisory until 11 pm edt this evening for anz231-
233>235-250.

Synopsis... Frank jwd gaf
near term... Kjc
short term... Frank
long term... Jwd
aviation... Frank jwd gaf
marine... Kjc frank jwd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi48 min 56°F 1019.5 hPa
44013 - BOSTON 16 NM East of Boston, MA 17 mi70 min ENE 12 G 14 51°F 51°F3 ft1018 hPa (+3.8)49°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi116 min ENE 9.7 G 12 51°F 49°F3 ft1016.4 hPa
IOSN3 - Isle of Shoals, NH 40 mi60 min NE 12 G 13 54°F 1017.9 hPa (+2.9)47°F
BGXN3 - Great Bay Reserve, NH 43 mi75 min NNE 1 58°F 1019 hPa48°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 45 mi70 min NE 14 G 16 50°F 4 ft1018 hPa (+3.5)45°F
44098 - Jeffrey's Ledge, NH (160) 48 mi52 min 47°F3 ft

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA6 mi66 minENE 710.00 miMostly Cloudy58°F45°F62%1018.8 hPa
Beverly, Beverly Municipal Airport, MA10 mi67 minNE 610.00 miOvercast57°F45°F64%1018.1 hPa
East Milton, MA18 mi64 minENE 14 G 20 mi53°F46°F77%1019.3 hPa
Laurence G Hanscom Field Airport, MA19 mi2.1 hrsE 410.00 miOvercast62°F46°F58%1018.4 hPa
Norwood, Norwood Memorial Airport, MA21 mi67 minENE 710.00 miOvercast58°F46°F65%1018.7 hPa
Lawrence Municipal Airport, MA22 mi66 minN 010.00 miOvercast57°F46°F67%1019.2 hPa

Wind History from BOS (wind in knots)
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E15E15E13E13E10E9SE8SE8

Tide / Current Tables for Nahant, Massachusetts
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Nahant
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Fri -- 12:30 AM EDT     Moonrise
Fri -- 03:43 AM EDT     9.35 feet High Tide
Fri -- 05:14 AM EDT     Sunrise
Fri -- 10:07 AM EDT     0.50 feet Low Tide
Fri -- 10:12 AM EDT     Moonset
Fri -- 04:27 PM EDT     8.31 feet High Tide
Fri -- 08:07 PM EDT     Sunset
Fri -- 10:20 PM EDT     1.65 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.267.89.19.38.575.13.11.30.50.92.13.75.57.28.28.27.35.94.32.71.71.9

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Fri -- 12:30 AM EDT     Moonrise
Fri -- 12:52 AM EDT     1.06 knots Max Flood
Fri -- 03:27 AM EDT     -0.00 knots Slack
Fri -- 05:14 AM EDT     Sunrise
Fri -- 08:02 AM EDT     -1.17 knots Max Ebb
Fri -- 10:12 AM EDT     0.00 knots Slack
Fri -- 10:13 AM EDT     Moonset
Fri -- 01:30 PM EDT     1.04 knots Max Flood
Fri -- 04:05 PM EDT     -0.00 knots Slack
Fri -- 08:07 PM EDT     Sunset
Fri -- 08:33 PM EDT     -0.99 knots Max Ebb
Fri -- 10:31 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.10.90.3-0.3-0.7-0.9-1.1-1.2-1-0.20.60.9110.60-0.4-0.7-0.8-1-1-0.50.4

Weather Map and Satellite Images
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GOES Local Image of    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 (21,6,7,8)
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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.