Wednesday, November13, 2019 L-36.com


Marine Weather and Tides
Somerville, MA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:30AMSunset 4:26PM Wednesday November 13, 2019 5:26 AM EST (10:26 UTC) Moonrise 6:25PMMoonset 8:23AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 324 Am Est Wed Nov 13 2019
.gale warning in effect until 8 am est this morning...
Today..NW winds 20 to 25 kt. Gusts up to 35 kt early this morning. Waves around 2 ft.
Tonight..NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Waves around 2 ft.
Thu..S winds 5 to 10 kt. Waves 1 foot or less.
Thu night..SW winds 5 to 10 kt. Waves 1 foot or less.
Fri..SW winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft.
Fri night..W winds 10 to 15 kt, becoming N 15 to 20 kt after midnight. Gusts up to 30 kt. Waves around 2 ft, except 3 to 5 ft at the outer harbor entrance.
Sat through Sun..NE winds 15 to 20 kt with gusts up to 30 kt. Waves 2 to 3 ft, except 4 to 6 ft at the outer harbor entrance.
Sun night..NE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 to 3 ft. A chance of rain. 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 324 Am Est Wed Nov 13 2019
Synopsis for massachusetts and rhode island coastal waters.. Gale force nw wind gusts will continue into this morning in the wake of a strong cold front. Large high pres will become centered over new england tonight then move offshore Thu. Another cold front will move across the waters Fri night followed by strong high pres building to the north on Sat. On Sunday, high pres will remain to our north while an ocean storm slowly approaches from the south. 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 Somerville, MA
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location: 42.37, -71.07     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 130923
afdbox
area forecast discussion
national weather service boston norton ma
423 am est Wed nov 13 2019

Synopsis
High pressure building in from the west will become centered
over new england tonight. It will bring record cold temperatures
today, along with gusty winds this morning. As the high moves
off the coast, temperatures begin to moderate on Thursday, but
will still be below normal for the middle of november. Even
milder weather is forecast for Friday, but then another strong
cold front will deliver unseasonably cold temperatures Friday
night through Saturday night. An ocean storm may impact the
region Sunday night into Monday with rain and wind along the
coast and pockets of interior ice.

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

it's a frigid morning out there with temperatures in the teens
to lower 20s and wind chill indices between 5 and 15 degrees,
except near 0 in the slopes of the berkshires.

Strong, large high pressure builds eastward into new england
today providing completely sunny skies. Despite the sunshine, we
are expecting record cold temperatures. Highs will be hard
pressed to break 32 in most areas and will likely remain in the
20s in northwestern ma. If so, this would break long-standing
records for the lowest maximum temperature for this date in
history. Boston's record low MAX temperature of 36 degrees has
stood for 145 years... Since 1874. Please see climate section
below.

Northwest winds will be gusty this morning... Up to 25-35 mph at
times, but the pressure gradient will slacken this afternoon and
winds will be correspondingly diminishing.

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

high pressure overhead will mean light wind and cold
temperatures. Skies will be clear before midnight, allowing for
good radiational cooling. But models show an increase in mid and
high level moisture overnight. Any mid cloudiness would probably
be enough to prevent temperatures from dropping into the single
digits. Am forecasting lows from 10 to 15 most areas, except
lower to mid 20s outer CAPE cod and nantucket.

Thursday...

high pressure moves offshore, allowing a return flow of moist
southerly air. A low level jet of 25-30 kt develops by afternoon
across southern new england, increasing low level warm
advection. Highs are forecast to reach the mid and
upper 30s in the interior and 40s in ri and southeast ma.

Am believing the 3km NAM model which is the most emphatic at
developing a rapid influx of low cloudiness from south to north
during the late morning hours. It is very dry aloft, which
means that as we saturate the low levels, drizzle or very light
rain showers should develop in the afternoon, especially across
ri and southeast ma. The air may be initially cool enough in the
merrimack valley and in worcester county for light snow to be
mixed with any rain and drizzle. For now, have only introduced
chance pops of 30-35 percent for Thursday afternoon. Will have
to see how this trends.

Long term Thursday night through Tuesday
Highlights...

* mainly dry with seasonable temps fri
* turning much colder again Fri night into Sat night
* an ocean storm may impact sne Sun night Mon with rain and coastal
wind along with pockets of ice possible in the interior
Thursday night...

high pres moves to the east with warm advection pattern developing.

Low level moisture moves in by evening across SE new eng and deepens
a bit overnight as modest low level jet develops. Models are hinting
at a weak inverted trough setting up across SE new eng which may
bring a few showers during the night, mainly across ri and SE ma.

Low temps will drop into the 20s in the interior, but mid upper 30s
along the coast as southerly flow develops.

Friday into Saturday...

robust northern stream shortwave dives SE across northern new eng
which will deliver another strong cold front which drops S across
sne Fri night. Ahead of the front, expect dry conditions Fri with
seasonable temps, then turning much colder Fri night into Sat behind
the front as strong high pres builds to the north on sat. Temps well
below normal although not quite as cold as current arctic airmass.

Gusty N winds will result in wind chills in the single numbers and
teens late Fri night and Sat morning. Expect a mainly dry FROPA fri
night with mostly sunny skies sat.

Sunday into Tuesday...

it appears dry weather will hang on through Sunday as high pres
keeps moisture to the south. However, ocean storm will be
approaching from the south and may impact the region Sun night into
mon. Still lots of uncertainty with the track of the storm and how
close it gets to new eng with large spread among deterministic
guidance as well as ECMWF ensembles for track and qpf. Also,
uncertainty on a potential second storm approaching from the south
on tue. Will continue chance pops as ECMWF ensembles show decent qpf
probs. Temps aloft are warming so rain will be favored, but high
pres to the north may provide enough low level cold air for some
interior ice Sun night early mon. It may also become windy along the
coast depending on how close storm tracks to new eng.

Aviation 09z Wednesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday ... High confidence.

0915z update...

today... High confidence.VFR. NW gusts 20-30 kt this morning,
diminishing in the afternoon.

Tonight... High confidence.VFR.

Thursday... Moderate confidence.VFR early. Then MVFR ceilings
developing with areas of drizzle and light rain showers in the
afternoon, possibly mixed with snow in central and northeast ma.

Local ifr possible late in the day.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Thursday night through Sunday ...

Thursday night:VFR. Breezy. Slight chance shra.

Friday:VFR. Breezy.

Friday night through Saturday:VFR. Windy with gusts up to
35 kt.

Saturday night:VFR. Windy with gusts up to 30 kt.

Sunday: mainlyVFR, with areas MVFR possible. Windy with local
gusts up to 30 kt.

Marine
Short term through Thursday ... High confidence.

415 am update...

gale warnings continue all waters except narragansett bay early
this morning, where a small craft advisory is in effect.

Northwest winds will still be gusting to 35 kt for a time in the
gale warning area. However, as high pressure builds in from the
west, the pressure gradient will weaken and gale warnings will
be downgraded to small craft advisories as the morning
progresses. Rough seas from 5 to 10 ft this morning over the
outer waters will be subsiding this afternoon.

Tonight... Seas of 5 feet linger on the outer waters this
evening, but will then be subsiding to 2 to 4 ft. N winds 10-20
kt become light ne.

Thursday... Winds become S and increase to 15 to 20 kt in the
afternoon. Chance of showers in the afternoon.

Outlook Thursday night through Sunday ...

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

Friday: low risk for small craft advisory winds with gusts up
to 25 kt. Areas of seas approaching 5 ft. Slight chance of rain
showers.

Friday night: low risk for gale force winds with gusts up to
40 kt. Areas of rough seas.

Saturday: moderate risk for gale force winds with gusts up to
40 kt. Rough seas up to 12 ft.

Saturday night: low risk for gale force winds with gusts up to
35 kt. Rough seas up to 10 ft.

Sunday: moderate risk for small craft advisory winds with gusts
up to 30 kt. Rough seas up to 10 ft. Slight chance of rain
showers.

Climate
Record low min temps for Wednesday nov 13
boston 14 1883
hartford 18 2001
providence 20 2001
worcester 15 1986
record low MAX temps for Wednesday nov 13
boston 36 1874
hartford 33 1911
providence 37 1911
worcester 32 1962,2013
record low min temps for Thursday nov 14
boston 16 1905
hartford 15 1986
providence 16 1905
worcester 10 1986

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Gale warning until 11 am est this morning for anz231>234-250-
251-254-255.

Gale warning until 8 am est this morning for anz230.

Small craft advisory until 1 pm est this afternoon for anz236.

Gale warning until 10 am est this morning for anz235-237-256.

Synopsis... Gaf kjc
near term... Gaf
short term... Gaf
long term... Kjc
aviation... Gaf kjc
marine... Gaf kjc
climate... Staff


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHBM3 - 8443970 - Boston, MA 1 mi56 min 22°F 48°F1017.3 hPa
44013 - BOSTON 16 NM East of Boston, MA 22 mi36 min WNW 25 G 33 23°F 53°F5 ft1016.9 hPa (+1.2)10°F
FOXR1 - 8454000 - Providence, RI 43 mi56 min NNW 14 G 23 21°F 52°F1019.3 hPa
PVDR1 44 mi56 min NW 13 G 18 21°F 1019.6 hPa-1°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi56 min WNW 19 G 27 24°F 1019 hPa
FRVM3 - 8447386 - Fall River, MA 46 mi56 min 24°F 50°F1019.5 hPa
CPTR1 - 8452944 - Conimicut Light, RI 47 mi56 min WNW 18 G 22 22°F 50°F1019 hPa
FRXM3 47 mi56 min 25°F 10°F
IOSN3 - Isle of Shoals, NH 48 mi86 min WNW 33 G 39 19°F 1015.2 hPa (+0.4)4°F
BGXN3 - Great Bay Reserve, NH 49 mi101 min WNW 9.9 19°F 1017 hPa8°F

Wind History for Providence, RI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boston, Logan International Airport, MA2 mi32 minWNW 18 G 2910.00 miFair and Breezy22°F0°F38%1018.7 hPa
Norwood, Norwood Memorial Airport, MA14 mi33 minWNW 11 G 1710.00 miFair21°F3°F45%1019.2 hPa
Laurence G Hanscom Field Airport, MA14 mi35 minWNW 1110.00 miFair18°F0°F45%1020.5 hPa
Beverly, Beverly Municipal Airport, MA17 mi33 minWNW 11 G 1810.00 miFair18°F0°F45%1017.8 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)
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1 day agoSW8S3SW5N5NE3NE4NE5NE6NE8NE10N9N11N8N6N10N7N8N7N10N11NE8N5NW4NW7
2 days agoSW10SW11SW11SW10SW9SW11SW16SW16SW14
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Tide / Current Tables for Charlestown Bridge, Charles River, Massachusetts
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Charlestown Bridge
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Wed -- 05:18 AM EST     0.68 feet Low Tide
Wed -- 06:32 AM EST     Sunrise
Wed -- 07:22 AM EST     Moonset
Wed -- 11:28 AM EST     10.54 feet High Tide
Wed -- 04:24 PM EST     Sunset
Wed -- 05:25 PM EST     Moonrise
Wed -- 05:48 PM EST     -0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.38.16.2420.81.12.74.87.19.110.410.39.174.62.20.3-0.20.92.857.28.9

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Wed -- 02:11 AM EST     -1.06 knots Max Ebb
Wed -- 05:16 AM EST     0.00 knots Slack
Wed -- 06:31 AM EST     Sunrise
Wed -- 07:22 AM EST     Moonset
Wed -- 07:29 AM EST     1.26 knots Max Flood
Wed -- 11:00 AM EST     -0.00 knots Slack
Wed -- 02:25 PM EST     -1.19 knots Max Ebb
Wed -- 04:23 PM EST     Sunset
Wed -- 05:24 PM EST     Moonrise
Wed -- 05:45 PM EST     0.00 knots Slack
Wed -- 07:53 PM EST     1.20 knots Max Flood
Wed -- 11:22 PM EST     -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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-0.7-0.9-1.1-1-0.9-0.30.71.21.21.10.7-0-0.6-1-1.2-1.2-1.1-0.70.211.21.10.90.3

Weather Map
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GEOS Local Image of Northeast    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 (5,6,7,8)
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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.