Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Onset, 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 6:39AMSunset 4:19PM Tuesday November 21, 2017 5:14 AM EST (10:14 UTC) Moonrise 10:10AMMoonset 7:57PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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
    EDIT      (on/off)   Help
ANZ234 Buzzards Bay- 358 Am Est Tue Nov 21 2017
.gale warning in effect from noon est today through this evening...
Today..SW winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to 5 ft.
Tonight..SW winds 15 to 20 kt with gusts up to 35 kt, diminishing to 10 to 15 kt with gusts up to 25 kt after midnight. Seas 3 to 5 ft. Rain.
Wed..W winds 5 to 10 kt, becoming nw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. Rain. Vsby 1 to 3 nm.
Wed night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Thu..NW winds 5 to 10 kt, becoming W in the afternoon. Seas around 2 ft.
Thu night..W winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.
Fri..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Fri night..SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..W winds 5 to 10 kt. Seas 2 to 3 ft. 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 358 Am Est Tue Nov 21 2017
Synopsis for massachusetts and rhode island coastal waters.. High pres will move off the mid-atlantic coast today. A cold front pushes across the waters by Wednesday. High pres builds over the waters Thu and Fri. Unsettled weather returns for 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 Onset, MA
   Hourly   EDIT   Help
location: 41.74, -70.66     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 210847
afdbox
area forecast discussion
national weather service taunton ma
347 am est Tue nov 21 2017

Synopsis
Mild day today as winds shift to the southwest. A cold front
approaches the region tonight, and will combine with moisture
working up the eastern seaboard to bring a period of rain
through Wednesday morning, especially SE new england. Dry and
colder conditions expected Wednesday night through the end of
this week. Milder with a few showers possible Saturday as a cold
front approaches, then blustery and colder weather follows
Sunday into Monday.

Near term until 6 pm this evening
High pressure south of the region continues to swing to the
east. This will result in mid-level ridge axis current over the
region to push eastward towards the morning hours. Clear skies
across the region have helped temperatures to drop into the mid
to low 30s away from the urban and coastal regions. Aside from a
few minor updates, the forecast remains on track this morning.

Today...

mid-level ridge axis will push northward towards the maritimes
today as cold front from the west approaches the region. Overall
anticipate a dry day as southwest winds take hold of the region.

Strong WAA will continue to stream into the region as 925mb
temps warm near 7-9 c by the afternoon. Bufkit soundings
indicate mixing to near 900 mb thus expect temperatures to warm
well into the 50's with locations across southeast mass near the
upper 50's. If we mix a bit higher, then cannot rule out a few
spots reaching 60f.

Clear skies across the area today. Cross-sections show some
moisture across the CAPE and islands which could bring a mix of
clouds and sun. Otherwise the focus is on the winds for today.

Increasing LLJ ahead of approaching front will mix down to the
surface today. Expect southwest winds gusting to around 25-35
mph.

Short term 6 pm this evening through 6 pm Wednesday
Dry weather to start tonight ahead of approaching cold front
from the west. High pressure to the east of the region will help
increase southerly low level moisture off the ocean. This flow
will increase low level moisture and thus some isolated showers
after 2 am across the south coast.

Upper level shortwave will help push the front closer to the
region during the early morning hours. While moisture appears to
be meager with this front, the focus is more on the coastal low
which will develop off the coast of the carolinas. Moisture
from this low will stream into the region resulting in pwat
values increasing to 1 inch which is 1-2 std above normal.

Appears that the 2 systems will remain split from each other,
however the interactions between the upper and low level jets
will help increase lift across the region. In fact, some model
guidance suggest strong lift around daybreak which could lead to
heavy downpours which will impact the Wed morning commute.

Still a spread in where the heavy axis will be located with the
ec and rgem on the western envelope compared to hi- res guidance
and nam. The GFS continues to the eastern outlier and thus
trended away from it. Right now appears the the axis of heavier
rainfall will occur across the i-95 corridor and points
eastward. However this axis could still shift if the two streams
do meet up, of if coastal low trends farther eastward.

Regardless, looks like a good slug of rain with QPF amounts
around 0.5-1 inch. These amounts could also increase within any
thunderstorms. Went ahead and inserted a slight chc of thunder
as dewpoints reach into the 50s and models continue to show some
surface cape. Highest confidence will be across the CAPE and
the islands.

Conditions will quickly improve from west to east during the
day on Wednesday. In fact, once the cold front moves through the
region, dry air will quickly usher into the region resulting in
clearing skies and dry weather. CAA will spill into the area
resulting in temperatures to fall during the day. NW winds will
also be on the increase as wind gusts increase to 25-30 mph by
the afternoon.

Long term Wednesday night through Monday
Highlights...

* mainly dry and cool thanksgiving day and Friday
* milder with a chance of showers Saturday
* blustery and colder Sunday Monday
21 00z guidance suite remains in rather good agreement on the
overall pattern through this portion of the forecast. In
general, looking at a persistent mid level trough lingering near
our region, although the amplitude and axis varies with time as
various shortwaves move through the flow. This should mean
temperatures trending below normal, especially late this weekend
into early next week.

Dry weather likely to persist into Friday, despite a cold front
getting close to the northern ma border Friday. The most
supportive moisture and dynamics for showers are expected to
remain over northern new england. Our next chance for
precipitation looks to be sometime this weekend. It's not
looking like a great risk, as humidity levels are somewhat
lacking. However, there are a couple of fronts to move through,
so this potential will need to be watched over the coming days.

Colder air arriving Sunday into Monday could generate some
ocean-effect showers toward the coast.

Aviation 08z 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 ... High confidence.

Before 12z...VFR. Gusty winds diminishing.

Today...VFR. Increasing ssw wind gusts 25-35 kt through the
day.

Tonight into Wednesday...VFR to start. Rain will overspread the
region from southwest to the northeast after 2 am lasting into
Wednesday morning. MVFR ifr CIGS within heavier rain showers
and fog. Conditions will improve toVFR quickly from west to
east during the day on Wed as cold front passes through.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Wednesday night through Saturday ...

Wednesday night:VFR. Windy with local gusts to 30 kt.

Thanksgiving day through Friday:VFR.

Friday night:VFR. Breezy.

Saturday:VFR. Breezy. Slight 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.

Today... Building seas across the region as LLJ increases ahead
of approaching cold front. Southwest wind gusts around 35-40 kts
will result in gales across the waters. Went ahead and included
mass bay, boston harbor and narragansett bay as strong mixing
will occur during the afternoon.

Tonight into tomorrow... Southwesterly gales will continue but
subside across the near shore waters. SCA will be needed as seas
will remain above 5 feet and gusts near 30kts. Approaching cold
front will bring widespread rain for the waters and limit vsbys
by Wed morning. Front will sweep through Wed afternoon switching
winds to the NW with gusts near 30 kts by Wed evening.

Outlook Wednesday night through Saturday ...

Wednesday night: low risk for small craft advisory winds with
local gusts up to 30 kt. Seas up to 5 ft.

Thanksgiving day: winds less than 25 kt. Local rough seas.

Thursday night through Friday night: winds less than 25 kt.

Seas up to 5 ft.

Saturday: winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Gale warning from noon today to midnight est tonight for
anz231>235-237-250-251-254>256.

Gale warning from noon today to 6 pm est this evening for
anz230-236.

Synopsis... Belk dunten
near term... Dunten
short term... Dunten
long term... Belk
aviation... Belk dunten
marine... Belk dunten


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 13 mi90 min 1.9 45°F 1021 hPa34°F
BZBM3 - 8447930 - Woods Hole, MA 15 mi45 min 48°F 49°F1020.3 hPa
44090 19 mi45 min 51°F1 ft
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 27 mi45 min SSW 6 G 8 45°F 1018.9 hPa
FRVM3 - 8447386 - Fall River, MA 27 mi45 min 43°F 48°F1020.1 hPa
FRXM3 28 mi45 min 44°F 33°F
BUZM3 - Buzzards Bay, MA 31 mi75 min WSW 25 G 28 49°F 1020.2 hPa (+0.0)
44020 - NANTUCKET SOUND 33 mi85 min WSW 12 G 16 48°F 49°F2 ft1020.5 hPa (+0.9)39°F
PRUR1 35 mi45 min 46°F 33°F
CPTR1 - 8452944 - Conimicut Light, RI 36 mi45 min SSW 9.9 G 13 42°F 49°F1019.5 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 37 mi45 min WSW 8 G 12 45°F 1019.6 hPa
NAXR1 - Narragansett Bay Reserve, RI 37 mi90 min WSW 7 43°F 999 hPa33°F
PVDR1 38 mi45 min SSW 5.1 G 6 41°F 1019.7 hPa28°F
NWPR1 - 8452660 - Newport, RI 39 mi45 min WSW 13 G 16 47°F 49°F1019.6 hPa
FOXR1 - 8454000 - Providence, RI 40 mi45 min WSW 4.1 G 6 39°F 50°F1019.3 hPa
QPTR1 - 8454049 - Quonset Point, RI 41 mi45 min SW 11 G 12 44°F 49°F1020 hPa
44013 - BOSTON 16 NM East of Boston, MA 42 mi85 min SSW 16 G 19 43°F 50°F2 ft1017.7 hPa (+0.4)
NTKM3 - 8449130 - Nantucket Island, MA 43 mi45 min WSW 5.1 G 7 48°F 46°F1020.9 hPa
BHBM3 - 8443970 - Boston, MA 47 mi45 min 39°F 1017.9 hPa

Wind History for Borden Flats Light at Fall River, MA
(wind in knots)    EDIT      (on/off)   Help
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
W17
G22
W18
G23
W19
G24
W21
G26
W21
G27
W21
G28
NW20
G27
W18
G25
W17
W16
W14
SW19
SW21
G27
W15
W16
SW14
SW15
SW19
SW18
SW12
G15
SW12
G15
SW13
S7
SW16
1 day
ago
SW21
G28
SW23
G30
SW28
G37
SW25
G32
SW25
G31
SW23
W36
G47
W29
G37
NW25
G31
W26
W25
G32
W17
G24
W20
G25
W18
G23
W15
G19
W18
G23
W18
G24
W14
G17
W17
G22
W16
W19
G23
W15
W20
G27
W17
2 days
ago
W6
W4
--
SW3
SW7
SW8
SW7
SW8
S5
S10
S10
G15
S15
G19
S13
G18
S12
G15
SW12
G16
S17
G24
SW22
G29
SW14
G17
S15
G21
S21
G26
S22
G32
SW25
G31
SW23
G29
SW23
G29

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA9 mi20 minS 610.00 miFair36°F30°F81%1020.3 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi23 minN 010.00 miFair34°F26°F73%1019.8 hPa
New Bedford, New Bedford Regional Airport, MA17 mi22 minN 010.00 miFair34°F25°F70%1019.8 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA21 mi19 minN 010.00 miFair30°F26°F85%1020 hPa
Taunton, Taunton Municipal Airport, MA22 mi23 minN 010.00 miFair30°F26°F85%1019.5 hPa
Marthas Vineyard Airport, MA23 mi22 minWSW 610.00 miFair46°F30°F54%1020.4 hPa

Wind History from FMH (wind in knots)
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrW12
G25
W14
G21
W22
G29
W19
G28
W22W22
G29
W21
G31
W17
G25
W19
G27
W18W13
G19
W10W7W13W18W13W10W11W12
G19
W12SW9W7W4S3
1 day agoSW23
G37
SW23
G31
SW21
G30
SW21
G33
SW23
G29
SW25
G33
SW24
G32
SW20
G33
W24
G32
W28
G34
W23
G32
W19
G31
W21
G29
W16
G25
W15
G21
W16
G25
W19
G25
W14W11W15W11
G21
W11W15
G20
W9
2 days agoW6CalmCalmCalmW3W3S6SW6S7S4SW10S9S6S7S14S11
G17
S12SW19
G31
SW15S14S18
G29
SW19
G32
S22
G31
S22
G34

Tide / Current Tables for Onset Beach, Onset Bay, Buzzards Bay, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Onset Beach
Click for Map
Tue -- 03:33 AM EST     0.05 feet Low Tide
Tue -- 06:39 AM EST     Sunrise
Tue -- 09:09 AM EST     Moonrise
Tue -- 09:57 AM EST     3.80 feet High Tide
Tue -- 04:17 PM EST     Sunset
Tue -- 04:19 PM EST     0.15 feet Low Tide
Tue -- 06:56 PM EST     Moonset
Tue -- 10:17 PM EST     3.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.21.30.60.10.10.61.222.93.53.83.632.11.20.50.20.30.71.322.73.23.1

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Tue -- 01:47 AM EST     -4.26 knots Max Ebb
Tue -- 04:49 AM EST     0.19 knots Slack
Tue -- 06:39 AM EST     Sunrise
Tue -- 07:44 AM EST     3.99 knots Max Flood
Tue -- 09:09 AM EST     Moonrise
Tue -- 11:03 AM EST     -0.16 knots Slack
Tue -- 02:02 PM EST     -4.47 knots Max Ebb
Tue -- 04:17 PM EST     Sunset
Tue -- 05:08 PM EST     0.03 knots Slack
Tue -- 06:56 PM EST     Moonset
Tue -- 08:11 PM EST     4.19 knots Max Flood
Tue -- 11:44 PM EST     -0.02 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3-4-4.2-3.8-2.61.23.13.843.62.80.7-2.9-4.1-4.5-4.2-3.2-1.22.83.84.243.52.5

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (5,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.