Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Boston, 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 5:06AMSunset 8:26PM Thursday June 21, 2018 4:21 AM EDT (08:21 UTC) Moonrise 2:00PMMoonset 1:30AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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- 343 Am Edt Thu Jun 21 2018
Today..NW winds around 5 kt, becoming E this afternoon. Waves 1 foot or less. A slight chance of showers with isolated tstms this afternoon.
Tonight..NE winds 5 to 10 kt. Waves 1 foot or less.
Fri..E winds 5 to 10 kt. Waves 1 foot or less.
Fri night..SE winds 5 to 10 kt. Waves 1 foot or less.
Sat..E winds 5 to 10 kt. Waves 1 foot or less. A chance of showers.
Sat night..E winds around 5 kt. Waves 1 foot or less. Showers likely.
Sun..SW winds around 5 kt. Waves 1 foot or less. A chance of showers.
Sun night..W winds around 5 kt. Waves 1 foot or less. A chance of showers.
Mon..NW winds 5 to 10 kt. Waves around 2 ft. A chance of showers.
Mon night..NW winds 5 to 10 kt. Waves 1 foot or less. 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 343 Am Edt Thu Jun 21 2018
Synopsis for massachusetts and rhode island coastal waters.. Low pres near the new jersey coast early this morning will track S of long island today. The system will bring showers, with some heavy downpours, and patchy fog across the southern waters through midday then will move offshore. High pres builds across the waters tonight and Fri. Low pres and an associated warm front will approach late Fri night, bringing showers Sat into Sat night. Showers may linger as a cold front approaches Sunday. 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 Boston, MA
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location: 42.36, -71.02     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 210756
afdbox
area forecast discussion
national weather service boston norton ma
356 am edt Thu jun 21 2018

Synopsis
Bit cooler with a spot showers today. Seasonable Friday while
turning unsettled Saturday, continuing through early Monday with
the chance of showers and thunderstorms. Dry weather expected
Tuesday and Wednesday.

Near term until 6 pm this evening
Precipitation along the south coast will be ongoing early in
this morning as surface low pressure continue to move across
the southern waters. Approaching wave from the northeast will
drive this low south and offshore leading to an end of the
precip. Will have to watch for a spot shower or two during the
day across the interior. Increasing low level moisture combined
with steep lapse rates and upper level trigger could lead to a
few showers especially along the higher terrain. Thus have
insert a slight chc for a shower during the afternoon.

Temperatures today will be warmer across the ct valley, but
quite cool along the east coast. Winds will switch from the
southwest to the northeast a front passes through. This will
bring the cooler maritime airmass onshore. Could see over a 10
degree difference across the region.

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

temperatures overnight will cool off, but not as much as prev
through. Increasing low level moisture trapped within the
inversion will result in stratus and fog across the area. Still
trying to narrow down best location, but something to watch for
in the coming shifts.

Friday... High pressure in place with dry weather and near normal
temperatures.

Long term Friday night through Wednesday
* highlights...

- Saturday perhaps not a washout, skirting rains S e
- showers t'storms N W Sunday, sweeping SE into Monday morning
- prolonged dry conditions during the week
- watching weeks-end for additional wet-weather disturbances
* overview...

pattern this weekend should feature above normal precipitable
water. Precipitable water values drop off to near to below
normal levels early next week. Temperatures on the other hand
should remain near normal, except for Saturday, and perhaps
Monday.

Split mid level flow regime should merge into a more unified
flow across much of the towards Monday. It appears likely the
pattern will transition from a potent mid level low over
northern quebec with a weaker cutoff over indiana to start this
weekend, to one which features a more amplified mid level trough
by Monday. This trough should move over the north atlantic
towards the middle of next week.

At the surface, this should mean a low pressure moving through
the great lakes towards northern new england this weekend. While
not a total washout, we will have at least a chance for showers
this weekend. A secondary cold front, along with a mid level
shortwave, should be enough to cause showers to linger into
Monday. This timing may change with later forecasts. Instability
is enough to warrant a mention of at least a few thunderstorms
at times this weekend.

High pressure with drier weather Tuesday into Wednesday.

Aviation 07z Thursday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

Overnight...

mainlyVFR. May see local MVFR at times along the immediate s
coast, CAPE cod and the islands in any -shra and patchy fog. Low
risk of brief ifr conditions across the islands mainly in cigs
after 06z or so. SW winds up to about 10 kt shifting to light nw
after 08z or so.

Thursday...

vfr. Lingering s-coastal island -shra with MVFR cigs, a brief
threat of ifr CIGS for ack around 12-18z. Improvement during the
afternoon hours, CIGS lifting 4-7 kft agl, as spot -shra develops
across interior S new england around orh. N winds turning ne.

Thursday night...

vfr to start but with northeast flow believe low levels will
saturate dropping CIGS and vsbys to MVFR conditions.

Kbos terminal...

keep -shra S of the terminal overnight.VFR prevailing.

Kbdl terminal...

expect -shra to be immediately S of the terminal. Will go low
endVFR overnight however there is a risk of some MVFR possibly
sneaking in prior to morning.

Outlook Friday night through Monday ... Moderate confidence.

Friday night:VFR. Breezy. Chance shra.

Saturday: mainlyVFR, with local MVFR possible. Breezy. Chance
shra, isolated tsra.

Saturday night: MVFR ifr conditions possible. Shra likely,
slight chance tsra.

Sunday: mainlyVFR, with local ifr possible. Chance shra,
isolated tsra.

Sunday night: mainlyVFR, with local MVFR possible. Chance
shra, isolated tsra.

Monday:VFR. Breezy. Chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday ... High confidence.

Passing low pressure system across the southern waters will
bring scattered showers which could briefly reduce visibility.

Seas could build to 3 feet. May see brief gusts up to 20 kt
across the southern near shore waters through 06z tonight.

Otherwise, SW winds will shift to a more NE direction th
lasting into Thu night. Could see local vsby restrictions in
patchy fog. Conditions remain below sca.

Outlook Friday night through Monday ... Moderate confidence.

Friday night: winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers.

Saturday: winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers, isolated thunderstorms.

Saturday night: winds less than 25 kt. Areas of seas
approaching 5 ft. Rain showers likely, and a slight chance of
thunderstorms.

Sunday through Sunday night: winds less than 25 kt. Local rough
seas. Slight chance of rain showers, with isolated
thunderstorms.

Monday: winds less than 25 kt. Seas up to 5 ft. Chance of rain
showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Belk evt
near term... Evt
short term... Evt
long term... Belk
aviation... Belk evt
marine... Belk evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 2 mi51 min 67°F 1006 hPa
44013 - BOSTON 16 NM East of Boston, MA 20 mi91 min SW 7.8 G 7.8 64°F 64°F1 ft1006.8 hPa (-0.9)63°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi77 min 60°F 60°F1 ft1005.3 hPa
FOXR1 - 8454000 - Providence, RI 43 mi51 min SW 1.9 G 5.1 69°F 67°F1006.8 hPa
PVDR1 44 mi51 min SSW 5.1 G 6 69°F 1007.4 hPa66°F
FRVM3 - 8447386 - Fall River, MA 46 mi51 min 68°F 69°F1007.7 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi51 min SW 7 G 8 68°F 1007.2 hPa
IOSN3 - Isle of Shoals, NH 47 mi81 min WSW 8.9 G 9.9 63°F 1006.1 hPa (-0.6)54°F
FRXM3 47 mi51 min 68°F 64°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi51 min S 8 G 8.9 67°F 69°F1007.2 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 48 mi91 min SSW 7.8 G 9.7 62°F 1 ft1007.2 hPa (-0.8)62°F
BGXN3 - Great Bay Reserve, NH 49 mi96 min WNW 1 57°F 55°F

Wind History for Providence, RI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW3
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G18
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S4
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA1 mi27 minSW 510.00 miA Few Clouds67°F59°F76%1006.8 hPa
East Milton, MA11 mi25 minWSW 9 mi63°F61°F93%1007.8 hPa
Norwood, Norwood Memorial Airport, MA14 mi28 minN 06.00 miFog/Mist57°F55°F93%1006.9 hPa
Bedford, Hanscom Field, MA16 mi25 minN 010.00 miFair57°F55°F96%1007.7 hPa
Beverly, Beverly Municipal Airport, MA16 mi28 minWSW 310.00 miFair60°F55°F86%1005.9 hPa

Wind History from BOS (wind in knots)
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Last 24hrNW6W5NW3NW44SE5SE4SE6SE7W11
G22
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W7W7SW7SW7SW6SW6SW7SW4SW5
1 day agoW11NW9
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NW11NW11
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NW12N8N8N7N9N9NW6NW6NW5W5
2 days agoSW11SW13SW15SW14SW13SW13
G18
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G24
SW18SW15S13S18
G23
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G27
SW15
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SW18
G28
SW7--SW14
G22
SW16SW16SW14SW14
G21
SW10SW14

Tide / Current Tables for Charlestown, Charles River, Massachusetts
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Charlestown
Click for Map
Thu -- 12:05 AM EDT     0.56 feet Low Tide
Thu -- 01:30 AM EDT     Moonset
Thu -- 05:07 AM EDT     Sunrise
Thu -- 06:20 AM EDT     9.99 feet High Tide
Thu -- 12:34 PM EDT     0.14 feet Low Tide
Thu -- 02:00 PM EDT     Moonrise
Thu -- 06:59 PM EDT     10.17 feet High Tide
Thu -- 08:24 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.12.54.56.88.99.99.78.66.74.31.90.40.31.33.15.47.89.610.29.68.26.13.7

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Thu -- 12:03 AM EDT     0.00 knots Slack
Thu -- 01:29 AM EDT     Moonset
Thu -- 03:26 AM EDT     1.00 knots Max Flood
Thu -- 05:07 AM EDT     Sunrise
Thu -- 05:57 AM EDT     -0.00 knots Slack
Thu -- 10:28 AM EDT     -1.16 knots Max Ebb
Thu -- 12:30 PM EDT     0.00 knots Slack
Thu -- 02:00 PM EDT     Moonrise
Thu -- 03:57 PM EDT     1.07 knots Max Flood
Thu -- 06:39 PM EDT     -0.00 knots Slack
Thu -- 08:24 PM EDT     Sunset
Thu -- 10:59 PM EDT     -1.21 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.60.910.90.5-0-0.4-0.7-0.9-1.1-1.1-0.50.40.811.10.80.3-0.1-0.5-0.8-1-1.2

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 (4,6,7,8)
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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.