Monday, November20, 2017 L-36.com


Marine Weather and Tides
Quincy, 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 6:40AMSunset 4:19PM Monday November 20, 2017 10:41 AM EST (15:41 UTC) Moonrise 9:21AMMoonset 7:11PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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- 1035 Am Est Mon Nov 20 2017
.small craft advisory in effect until 6 pm est this evening...
This afternoon..W winds 15 to 20 kt with gusts up to 30 kt. Waves around 2 ft.
Tonight..SW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft.
Tue..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 30 kt. Waves around 2 ft.
Tue night..SW winds 5 to 10 kt with gusts up to 25 kt. Waves around 2 ft. A chance of showers.
Wed..SW winds 5 to 10 kt, becoming nw with gusts up to 20 kt in the afternoon. Waves 1 foot or less. Showers.
Wed night..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft.
Thu..W winds 5 to 10 kt. Waves 1 foot or less.
Thu night..SW winds 5 to 10 kt. Waves 1 foot or less.
Fri..W winds 5 to 10 kt. Waves 1 foot or less.
Fri night..SW winds 5 to 10 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 1035 Am Est Mon Nov 20 2017
Synopsis for massachusetts and rhode island coastal waters.. Inbetween a deep low pres system over eastern quebec and strong high pres building to our south, wnw gales will blow across the waters this afternoon. High pres will move off the mid-atlantic coast tonight and Tue then be followed by another cold front moving across new england Wed. High pres builds over the waters Thu and Fri. 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 Quincy, MA
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location: 42.27, -70.96     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 201505
afdbox
area forecast discussion
national weather service taunton ma
1005 am est Mon nov 20 2017

Synopsis
Low pressure in eastern quebec provides blustery and chilly
conditions across southern new england today. The high moves
south of the region Tue as winds shift to the southwest along
with milder temperatures. A cold front approaches the region
Tuesday night, and will combine with moisture working up the
eastern seaboard to bring showers across the region through
Wednesday. Dry and cold conditions expected Wednesday night
through the end of the week. A cold front may bring showers
Friday night into Saturday.

Near term until 6 pm this evening
7am update...

forecast generally remains on track this morning although
temps dwpts are running a bit higher than previous forecast
suggested. So will update these to bring them up to current
trends. Also noted that daytime mixing is reasonably efficient
given the shortwave rotating through, which suggests highs a bit
warmer as well. Otherwise, breezy conditions persist until this
wave is fully exiting the region.

Previous discussion...

fairly high amplitude mid level mean trough moving through the
region this morning with 500 mb temps down to about -36c over
lake ontario per early morning SPC mesoanalysis. This
instability combined with cyclonic flow over the northeast
yielding periods of cloudiness across southern new england.

Embedded with this large scale flow are a few lake effect snow
streamers from ny state traversing ct into ri with another band
over northwest ma.

00z NAM and other hi res guidance capturing these narrow lake
effect bands very well, so leaned on this guid for the morning
hours. Not expecting much snow but a few of these bands may
briefly lower vsby and leave a quick dusting or coating behind.

However most locations will remain dry. By afternoon model low
level streamlines indicates trajectory will shift into northwest
ma. Thus any snow shower flurries this afternoon will be
focused over this region.

Otherwise a mix of Sun and clouds today, chilly with blustery
w-nw winds up to 35 mph. Colder than normal with highs only
40-45 except only mid to upper 30s across the high terrain. It
will feel even colder give the gusty w-nw winds. Normal highs
for 11 20 should be in the upper 40s to lower 50s.

Short term 6 pm this evening through 6 pm Tuesday
330 am update...

tonight...

mid level mean trough kicks eastward with height rises
overspreading the region as mean ridge pushes toward new
england. Anticyclonic flow will provide dry weather. Some
mid high clouds may clip western ma as warm front lifts
northward across ny state into vt. This transition airmass
change will result in temps not as cold as this morning along
with less wind, with winds shifting from wnw to ssw. So coolest
temps likely this evening and then temps leveling off or rising
toward morning especially along the coast.

Tuesday...

short wave ridging across new england as next northern stream
trough dives into the great lakes. Thus dry weather expected.

Tightening ssw pgrad as high pres moves offshore as cold front
enters eastern lakes. A robust low level ssw jet of 40-45 kt
develops over the area tue. Given WAA pattern blyr not fully
mixed but model sndgs indicate up to 35 kt 40 mph possible. So a
windy day but this low level WAA pattern will provide mild
conditions as 925 mb temps warm to about +5c, supporting highs
in the mid to upper 50s, except low 50s across the high terrain.

About 5-8 degs warmer than normal. Should be a mostly sunny day
as well.

Long term Tuesday night through Sunday
Highlights...

* leftover SW wind gusts Tuesday evening ahead of approaching
cold front
* atlantic moisture will stream across the region as the cold
front pushes across late Tuesday night and Wednesday
* dry but chilly for thanksgiving day and Friday
* a cold front may bring some showers Fri night into early next
weekend
overview...

continued progressive mid level steering pattern noting during
most of this forecast period. However, will see amplified but
progressive h5 trough dig across the eastern u.S. Tuesday night
into Wednesday. Most models still signaling low pressure
developing off the SE coast and will combine with h5 short wave
approaching new england to bring tropical moisture up the coast
late Tue night and Wednesday.

As the front pushes offshore Wed night, will see mainly dry
weather but colder than average temperatures for thanksgiving
and Friday as high pressure ridge builds in. Models showing some
timing and track differences of another low that looks to pass
s and E of CAPE cod Thu night into Fri as another h5 trough digs
across the eastern seaboard. Strong low pressure across southern
canada will bring another cold front moving across late fri
night or Sat that may linger further into next weekend.

Expect temperatures to run close to or below normals through
this period.

Details...

Tuesday night and Wednesday... High confidence.

High pres at the surface and aloft moves off the eastern
seaboard Tue night. Rather strong pressure gradient on western
periphery of the high. Low level jet at 45-50 kt from h95 to
h925 Tue evening across S coastal ma and S ri along with the
leftover low level lapse rates (on order of 7-8c km) through
around midnight may be enough for some SW wind gusts up to 30-35
kt or a bit higher. During the early morning hours, will see
pres gradient between the high and approaching front relax and
the low level jet move offshore.

Noting inverted troughing off the carolina coast with s-se
winds bringing surge of low level moisture up the coast on the
backside of the high, then gets caught up in the s-sw flow ahead
of approaching cold front. Models continue to signal weak
tropical or subtropical low form off the fl coast which will
ride NE in the low level flow.

The moisture plume will enhance the precip across eastern areas
as the low passes E of the 40n 70w benchmark. Showers will move
into S coastal areas late Tue night with the best QPF amounts
moving in Wednesday, with the highest amounts forecast along e
coastal areas on the order of 0.4 to 0.7 inches.

The cold front pushes through late Wed wed evening, with rain
possibly changing over to snow showers across the E slopes of
the berkshires before ending. Not expecting much in the way of
accumulations there. The colder air works in Wed night as skies
become mostly clear, though some clouds linger along S coastal
areas.

Thanksgiving and Friday... High confidence.

Behind the front on Wednesday, CAA will move back into the
region for Thursday. High pressure ridging builds across the
region with a dry but cool day expected for thanksgiving.

Another mid level short wave moves across Thu night and Friday,
but the moisture remains N of the region so expect to see
continued dry and cool conditions.

Friday night through Sunday... Low to moderate confidence.

Expect dry conditions Fri night as high pressure moves east.

May see a dry cold front move across, then stall S of the
region. Low pressure moves across central canada, with its
associated front approaching. This may bring a chance of light
mixed precip to the E slopes of the berkshires after midnight
then will change over to rain Sat morning as the precip
progresses eastward. Not a lot of confidence on the timing of
this front, and whether precip may linger into Sat night. Looks
like another shot of cold air works in late next weekend but
mainly dry conditions seen for now.

Aviation 15z Monday through Friday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday ... High confidence.

1140z update...

through today...

vfr conditions with sct-bkn clouds at 5-6kft, though may see
brief MVFR conditions in isolated snow showers which should
taper off by mid morning. W-nw winds with gusts up to 30-35 kt,
highest across central and western areas. Higher terrain may see
gusts up to 40 kt.

Tonight...VFR. Diminishing wind and becoming ssw.

Tuesday...VFR but increasing ssw wind gusts 25-35 kt.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf. Scattered light snow
showers til 07z or so with marginal MVFR-vfr CIGS and vsby
possibly briefly lowering to 4sm in -shsn. OtherwiseVFR and
dry.

Outlook Tuesday night through Friday ...

Tuesday night: mainlyVFR, with local MVFR possible. Windy with
gusts to 35 kt. Chance shra.

Wednesday: mainlyVFR, with areas MVFR possible. Breezy. Shra
likely.

Wednesday night:VFR. Breezy.

Thanksgiving day through Friday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday ... High forecast confidence.

640 am update...

today...

marginal w-nw gales with gusts up to 35 kt. A few brief
rain snow showers through mid morning, otherwise mainly dry
weather prevails.

Tonight...

wnw winds slacken and shift from wnw to ssw as high pres slides
south of new england. Dry weather and good vsby prevail.

Tuesday...

ssw winds may approach gale force especially near shore.

Otherwise dry weather and good vsby prevail. Ssw winds will
provide a long fetch of wind along the south coast and will
yield building seas.

Outlook Tuesday night through Friday ...

Tuesday night: moderate risk for small craft advisory winds
with gusts up to 30 kt. Areas of rough seas. Chance of rain
showers.

Wednesday: low risk for small craft advisory winds with gusts
up to 25 kt. Areas of seas approaching 5 ft. Rain showers.

Wednesday night: moderate risk for small craft advisory winds
with gusts up to 25 kt. Local rough seas. Chance of rain
showers.

Thanksgiving day through Friday: winds less than 25 kt. Seas up
to 5 ft.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Gale warning until 6 pm est this evening for anz231>235-237-
250-251-254>256.

Small craft advisory until 6 pm est this evening for anz230-
236.

Synopsis... Nocera evt
near term... Nocera doody
short term... Nocera
long term... Evt
aviation... Nocera evt
marine... Nocera evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 8 mi42 min 40°F 1011 hPa (+2.0)
44013 - BOSTON 16 NM East of Boston, MA 17 mi52 min W 25 G 31 38°F 50°F4 ft1009.9 hPa (+2.3)
44029 - Buoy A0102 - Mass. Bay/Stellwagen 27 mi98 min WNW 23 G 35 38°F 49°F4 ft1009.6 hPa
PVDR1 40 mi42 min WNW 8 G 18 40°F 1013.8 hPa (+1.8)18°F
FOXR1 - 8454000 - Providence, RI 40 mi48 min NW 13 G 18 39°F 51°F1013.3 hPa
FRVM3 - 8447386 - Fall River, MA 41 mi42 min 39°F 49°F1014.3 hPa (+1.9)
FRXM3 41 mi42 min 40°F 24°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 41 mi42 min W 21 G 27 39°F 1012.7 hPa (+1.7)
CPTR1 - 8452944 - Conimicut Light, RI 43 mi42 min WNW 24 G 27 38°F 49°F1013.5 hPa (+1.7)
44090 45 mi42 min 51°F4 ft
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi42 min NW 11 G 18 40°F 1014 hPa (+1.7)
NAXR1 - Narragansett Bay Reserve, RI 48 mi57 min NW 12 40°F 994 hPa21°F
PRUR1 49 mi42 min 40°F 19°F

Wind History for Providence, RI
(wind in knots)    EDIT      (on/off)   Help
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W10
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N17
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NW12
G20

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA8 mi48 minW 24 G 3110.00 miA Few Clouds and Windy38°F14°F37%1011.9 hPa
East Milton, MA9 mi46 minWNW 18 G 31 miBreezy36°F14°F40%1012.6 hPa
Norwood, Norwood Memorial Airport, MA12 mi49 minW 16 G 2810.00 miA Few Clouds41°F15°F35%1012.7 hPa
Marshfield Airport, MA19 mi72 minW 12 G 2410.00 miFair39°F14°F36%1011.8 hPa
Bedford, Hanscom Field, MA22 mi1.8 hrsWNW 13 G 2610.00 miA Few Clouds36°F12°F39%1012.8 hPa
Beverly, Beverly Municipal Airport, MA22 mi49 minWNW 17 G 2810.00 miFair38°F12°F36%1010.7 hPa

Wind History from BOS (wind in knots)
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Last 24hrSW18
G23
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G37
W18
G34
W23
G37
W22
G33
W22
G40
W22
G27
W19
G25
W20
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W18
G25
W21
G30
W12W14W15
G21
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W11W11
G21
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W9
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G31
W17
G26
W15
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W24
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1 day agoSE3S7SW8S9S6SE6E6E6SE4SE5SE7SE8S7SW8S5S11S11S10S14
G21
S11S16
G23
S11S12S14
2 days agoNW17
G31
NW18
G27
NW17
G30
NW16
G23
W17
G24
NW12
G22
W12NW10W12W11W9W12NW9--W7W8W7CalmSW3SW4W5W5S4S5

Tide / Current Tables for Nut Island, Massachusetts
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Nut Island
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Mon -- 12:10 AM EST     9.10 feet High Tide
Mon -- 06:00 AM EST     0.84 feet Low Tide
Mon -- 06:40 AM EST     Sunrise
Mon -- 08:20 AM EST     Moonrise
Mon -- 12:15 PM EST     9.96 feet High Tide
Mon -- 04:17 PM EST     Sunset
Mon -- 06:11 PM EST     Moonset
Mon -- 06:32 PM EST     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.18.77.45.63.51.60.81.5357.199.99.68.36.341.70.20.11.32.957

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Mon -- 03:58 AM EST     -1.14 knots Max Ebb
Mon -- 05:59 AM EST     0.00 knots Slack
Mon -- 06:40 AM EST     Sunrise
Mon -- 08:20 AM EST     Moonrise
Mon -- 09:16 AM EST     1.15 knots Max Flood
Mon -- 11:49 AM EST     -0.00 knots Slack
Mon -- 04:17 PM EST     Sunset
Mon -- 04:19 PM EST     -1.24 knots Max Ebb
Mon -- 06:11 PM EST     Moonset
Mon -- 06:29 PM EST     0.00 knots Slack
Mon -- 09:44 PM EST     1.09 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.6-0.9-1.1-1.1-0.900.81.11.11.10.5-0.1-0.6-0.9-1.1-1.2-1.1-0.50.50.911.10.8

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

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.