Tuesday, June19, 2018 L-36.com


Marine Weather and Tides
Chelsea, MA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:05AMSunset 8:25PM Tuesday June 19, 2018 10:18 AM EDT (14:18 UTC) Moonrise 11:47AMMoonset 12:28AM Illumination 36% 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- 716 Am Edt Tue Jun 19 2018
Today..NW winds 5 to 10 kt with gusts up to 20 kt. Waves 1 foot or less.
Tonight..NW winds around 5 kt. Waves 1 foot or less.
Wed..SW winds 5 to 10 kt. Waves 1 foot or less.
Wed night..SW winds 5 to 10 kt. Waves 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 W around 5 kt after midnight. Waves 1 foot or less.
Fri..E winds around 5 kt. Waves 1 foot or less.
Fri night..S winds around 5 kt. Waves 1 foot or less.
Sat..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Sat night..S winds 5 to 10 kt. Waves 1 foot or less. A chance of showers. 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 716 Am Edt Tue Jun 19 2018
Synopsis for massachusetts and rhode island coastal waters.. A cold front will sweep offshore during the morning hours today behind which winds will shift northerly as high pressure builds in from the west. Shifting east, an area of low pressure follows for Wednesday night skirting south coastal new england with rain and possibly lower visibility. Seasonable and dry weather follows with return high pressure the remainder of the week, while a warm front lifts north across the waters over the weekend. 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 Chelsea, MA
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location: 42.37, -71.06     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 191404
afdbox
area forecast discussion
national weather service boston norton ma
1004 am edt Tue jun 19 2018

Synopsis
Seasonable, dry, comfortable conditions with lower humidity today.

Low pressure passes off the south coast Wednesday, with a chance
of showers along the coast. High pressure from canada brings dry
weather Thursday and Friday. A cold front them brings a chance of
showers over the weekend, followed by dry weather early next week.

Near term until 6 pm this evening
10 am update...

forecast is on track and only made minor adjustments.

Drier air continues to push SE across new england as dewpoints
drop into 50s this afternoon. Although we have seen lower clouds
scour out, there will be some mid high clouds around through mid
afternoon, but still plenty of sunshine.

Short term 6 pm this evening through 6 pm Wednesday
Tonight...

radiational cooling. High pressure in control. Light winds, mostly
clear conditions, leaning with coolest of MOS guidance. Talking
lows around the upper 40s to low 50s. No need for the ac, open
your windows.

Wednesday...

mainly a dry, seasonable day under the continued weight of high
pressure. Shifting to the e, return S flow late, however light
enough to allow e-coastal sea-breezes. Meanwhile, weak, fast-moving
disturbance emerging out of the oh river valley. Isentropic-ascent
ahead of a re-enforcing cold front out of canada, looking at
increasing clouds towards Wednesday evening initially, any skirting
rain to hold off later. Again, dry forecast.

Long term Wednesday night through Monday
Mid level flow pattern remains fairly stable through the end of
this work week, then should undergo more significant changes
this weekend into early next week. These changes will be
predicated upon the timing of some shortwave energy to phase
with a more persistent mid level trough over southeast canada.

Decent amount of spread in the ensembles, as well as among the
operational guidance. Forecast confidence is high through
Friday, trending to moderate for this weekend and early next
week.

Low pressure should pass by far enough to our south Wednesday
night into Thursday where only a chance of showers along the
south coast. High pressure arrives later Thursday and should
linger through Friday. Will keep a mention for a chance of
showers this weekend, but will not try to narrow the window of
these showers much. This will depend upon the timing of
shortwave energy crossing the county. More changes to this
timing are very possible, if not likely. Drier weather should
develop for early next week.

Otherwise, temperatures are expected to be near to slightly
above normal, depending upon how much sunshine we get. Humidity
start out fairly comfortable, then should increase into this
weekend.

Aviation 14z 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 ... Moderate confidence.

This afternoon...

lingering MVFR ceilings near outer CAPE and ack will clear out
by early afternoon. OtherwiseVFR with N winds gusting up to
20kt.

Tonight..

Vfr. However conditions just right within sheltered valleys, may
see some spotty ifr-lifr conditions with fg. Higher confidence
in mid to upper ct river valley.

Wednesday...

vfr. Overall light winds becoming S sw. Allowance for e-coastal
sea-breezes to develop around 15z. Increasing mid-upper level
cigs late.

Kbos terminal...

holdVFR throughout. NW flow through the day, gusts up to 20 kt
early.

Kbdl terminal...

maintainVFR however not ruling out MVFR when observing upstream
trends presently over NW ma. An opportunity during the morning
push before clearing out. Wind shift at the terminal around 940z.

Outlook Wednesday night through Saturday ... Moderate confidence.

Wednesday:VFR. Breezy.

Wednesday night:VFR. Breezy. Slight chance shra.

Thursday through Friday night:VFR.

Saturday:VFR. Chance shra.

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.

N winds gust up to 20kt this afternoon. Small craft advisories
remain in place for ocean waters E of CAPE cod for leftover 4-5
ft seas. Tonight and into Wednesday, high pressure in control
yielding light winds, good boating weather. E onshore sea
breeze flow Wednesday.

Outlook Wednesday night through Saturday ... Moderate confidence.

Wednesday: winds less than 25 kt.

Wednesday night: winds less than 25 kt. Chance of rain showers.

Thursday through Friday night: winds less than 25 kt.

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 2 pm edt this afternoon for
anz254>256.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 1 mi49 min 76°F 1006.3 hPa
44013 - BOSTON 16 NM East of Boston, MA 22 mi89 min NW 12 G 14 65°F 60°F1 ft1006.1 hPa (+2.6)60°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 28 mi75 min 60°F 57°F1 ft1005 hPa
FOXR1 - 8454000 - Providence, RI 43 mi55 min NE 13 G 17 77°F 67°F1006.9 hPa
PVDR1 44 mi49 min N 12 G 17 78°F 1007.5 hPa59°F
FRVM3 - 8447386 - Fall River, MA 46 mi55 min 74°F 68°F1007.5 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi49 min N 14 G 18 76°F 1007 hPa
FRXM3 47 mi49 min 75°F 61°F
IOSN3 - Isle of Shoals, NH 47 mi79 min NW 13 G 15 69°F 1005.7 hPa (+2.0)56°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi49 min NNW 20 G 22 74°F 69°F1007.2 hPa
BGXN3 - Great Bay Reserve, NH 49 mi94 min WNW 4.1 74°F 61°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, MA2 mi25 minNNW 11 G 2110.00 miMostly Cloudy78°F57°F50%1007.1 hPa
East Milton, MA11 mi23 minNNW 8 G 16 mi75°F61°F62%1008.4 hPa
Norwood, Norwood Memorial Airport, MA14 mi26 minNW 910.00 miFair79°F61°F54%1007.2 hPa
Bedford, Hanscom Field, MA14 mi83 minNNW 910.00 miFair74°F61°F64%1008.1 hPa
Beverly, Beverly Municipal Airport, MA16 mi26 minNW 13 G 2110.00 miMostly Cloudy75°F60°F60%1006.4 hPa

Wind History from BOS (wind in knots)
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Last 24hrSW14SW20
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G22
SW16SW16SW14SW14
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SW10SW14W11NW9
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1 day agoSE8E12E11E13E9E9E9E11E8E53S4S8S8SW10SW11SW9SW9SW11SW13SW15SW14SW13SW13
G18
2 days agoNW13
G19
NW11NW11
G18
NW9W11N8NW8NW5SE8SE5CalmSE4CalmCalmCalmS5CalmW5CalmNE4W6CalmNW3W5

Tide / Current Tables for Charlestown Bridge, Charles River, Massachusetts
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Charlestown Bridge
Click for Map
Tue -- 12:27 AM EDT     Moonset
Tue -- 04:20 AM EDT     11.05 feet High Tide
Tue -- 05:07 AM EDT     Sunrise
Tue -- 10:41 AM EDT     -0.79 feet Low Tide
Tue -- 11:46 AM EDT     Moonrise
Tue -- 05:03 PM EDT     10.30 feet High Tide
Tue -- 08:24 PM EDT     Sunset
Tue -- 11:06 PM EDT     0.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.657.59.81110.79.374.31.6-0.4-0.70.52.557.59.510.39.88.263.51.30.4

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Tue -- 12:27 AM EDT     Moonset
Tue -- 12:59 AM EDT     1.11 knots Max Flood
Tue -- 03:50 AM EDT     -0.00 knots Slack
Tue -- 05:06 AM EDT     Sunrise
Tue -- 08:22 AM EDT     -1.16 knots Max Ebb
Tue -- 10:35 AM EDT     0.00 knots Slack
Tue -- 11:46 AM EDT     Moonrise
Tue -- 01:51 PM EDT     1.12 knots Max Flood
Tue -- 04:30 PM EDT     -0.00 knots Slack
Tue -- 08:23 PM EDT     Sunset
Tue -- 09:00 PM EDT     -1.10 knots Max Ebb
Tue -- 11:03 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.110.6-0.1-0.6-0.9-1.1-1.2-1.1-0.60.411.11.10.90.3-0.2-0.6-0.9-1-1.1-0.9-0.1

Weather Map and Satellite Images
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wmap_A
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 (10,2,3,4)
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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.