Monday, June26, 2017 L-36.com


Marine Weather and Tides
New Seabury, 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 5:07AMSunset 8:21PM Monday June 26, 2017 6:18 PM EDT (22:18 UTC) Moonrise 8:03AMMoonset 10:31PM Illumination 8% 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
ANZ232 Nantucket Sound- 331 Pm Edt Mon Jun 26 2017
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas around 2 ft.
Tue..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 20 kt. Seas around 2 ft.
Tue night..SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas 1 foot or less. A chance of showers.
Wed..W winds around 5 kt, becoming sw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft.
Wed night..SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Seas around 2 ft.
Thu..SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas around 2 ft.
Thu night..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Fri..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers and tstms.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers and tstms.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..SW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas 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 331 Pm Edt Mon Jun 26 2017
Synopsis for massachusetts and rhode island coastal waters.. Weak cold fronts will move into the waters Tue evening. High pres builds south of the waters Wed. A warm front will lift north through new eng Thu with gusty sw winds developing late Thu into Fri and lasting through Sat. 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 New Seabury, MA
   Hourly   EDIT   Help
location: 41.55, -70.48     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 261944
afdbox
area forecast discussion
national weather service taunton ma
344 pm edt Mon jun 26 2017

Synopsis
Additional upper level disturbances move across new england
early tonight and later Tuesday, bringing a few showers and
isolated thunderstorms. The greater threat will be on Tuesday.

A warming trend begins for the latter half of the week with a
return to summer heat and humidity Friday and Saturday. A warm
front may bring some showers and some thunderstorms Thursday
night, with more showers and thunderstorms possible Friday
through the weekend.

Near term until 6 am Tuesday morning
Scattered showers and isolated thunder will be possible through
the evening as a weak shortwave passes to our north. Stability
parameters are marginal for thunder, but enough to include a
mention. Best chance will be in areas north of the mass pike.

Convection diminishes early tonight. Expect quiet weather
overnight. Of note, the GFS develops an area of showers around
midnight between washington and philadelphia, then moves it up
through nyc into southern new england by 12z. The ECMWF and nam
show nothing, as does the SPC hrrr. The ggem shows nothing to
our south but develops a few hundredths over southern ct by 12z.

Inclination is to treat the GFS pcpn as an outlier.

Dew points in the 50s again tonight, so expect similar min
temps... 50s and lower 60s.

Short term 6 am Tuesday morning through Tuesday night
Sharp shortwave over the great lakes today moves through the
cyclonic flow. One part ejects across ny and northern new
england Tuesday afternoon evening, while the main portion
crosses our area late Tuesday night or Wednesday morning.

We remain on the edge of the cold pool Tuesday, but close enough
to expect mid level lapse rates of 6.5 to 7c km during the
afternoon and early night. Going along with this will be totals
in the lower 50s and LI values below zero, as well as sbcape
values of 500-1000 j kg. Theta-e values show a ridge over ct
during the afternoon evening. Expect scattered showers tstms
during the afternoon and early night.

Winds aloft show some support for a few strong or damaging
storms. Winds at 850 mb will be 20-30 knots during Tuesday
afternoon, although this is forecast to move offshore by
evening. Winds at 500 mb are forecast at 50-60 knots during
Tuesday afternoon, but also move offshore by evening. Timing of
this wind and of the shower TSTM development may be the
determining factor in how strong these storms may get. The mixed
layer is expected to reach near 850 mb, where winds as noted
above will be 20 to 30 knots. Our forecast includes gusts on the
lower half of that range, but slightly higher values are
possible.

With the main shortwave moving through during Tuesday night, and
with the upper cold pool moving overhead, expect a continued
chance of showers storms Tuesday night.

If mixing reaches 850 mb it will work on temps of 8-10c, which
suggests MAX sfc temps of 75 to 80. If mixing GOES a little
higher, such as to 800 mb, then MAX sfc temps would be more
centered around 80. No change in the airmass Tuesday night
compared with tonight, so expect similar min temps.

Long term Wednesday through Monday
Highlights...

* pleasant Wednesday with low risk of a shower
* heat and humidity return Friday thru Sunday
* thunderstorm chances increase Thursday night through Sunday
details...

Wednesday...

an area of high pressure passes to our south, and model soundings
show quite dry airmass in place with precipitable water around 0.75
inch. Models show a short wave moving thru the area, then modest mid
level ridging develops later in the day. Anticipating development of
diurnal cumulus clouds, overall partly to mostly sunny skies.

Guidance continues to show very little QPF on Wednesday. Can't rule
out a few pop-up showers during the afternoon since low level lapse
rates are steep, however for much of the area, the day should stay
dry. Highs mainly in the 70s with dew points dropping to 45-50 in
the afternoon.

Dry conditions expected Wednesday night with any isolated diurnal
showers coming to an end early. Winds aloft will begin to turn more
to the southwest by Wednesday night with warm air advection, which
should bring some increase in clouds. Overnight lows mainly upper
50s to low 60s.

Thursday...

surface high pressure slides offshore, meanwhile low pressure
tracking east thru the great lakes region pushes a warm front
northeastward across southern new england. As we end up in the warm
sector, increasing heat and humidity will occur. Increasing moisture
will result in more clouds, and the potential for showers and
thunderstorms. Highest probability for precipitation would be across
the northern half of our area, continuing with likely pops there.

Chance pops further to the south. Could see gusty winds with any
thunderstorms and or if Sun breaks out for awhile and allows good
mixing, potential gusts 25 to 30 mph or so.

With zonal flow and both 850mb isotherms and winds becoming
parallel, appears that any convection that generates across upstate
ny could track eastward into southern new england. Will continue the
chance for showers thunderstorms into Thursday night. More abundant
cloud cover coupled with high surface dew points will keep lows in
the 60s.

Friday thru Sunday...

continue to anticipate an unsettled weather pattern for this
timeframe, influenced by broad upper trough to near zonal flow, with
periodic short waves passing thru our area, and areas of surface low
pressure moving thru the flow and to our north. Southern new england
remains in the warm sector until later Sunday, with heat and
humidity. Models continue to indicate during Fri night Saturday that
a back door cold front should remain to our north. Thus the
potential for 90 degree high temps returns for both Friday and
Saturday. Chance for showers and thunderstorms each day. Difficult
to place the exact timing and location of any strong storms during
Friday and Saturday.

During Sunday models indicate a cold front pushing thru the area,
which would be a trigger additional showers and thunderstorms.

The potential for strong thunderstorms appears possible each day
during this period. One caveat to watch is the subtropical ridge. If
this ridge moves closer, it may keep portions of the area dry.

Monday...

with cold front possibly to the east, drier airmass should build
into the area. Some uncertainty here whether the day is dry or
whether a short wave can bring some diurnal showers to the area.

Will have slight chance to low chance pops.

Aviation 20z Monday through Saturday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday night ... High confidence.

This evening and tonight...

vfr. Scattered to broken cumulus with bases 5000-6000 feet.

Scattered showers and isold t-storms in the interior, mainly
along north of the mass pike. Showers and tstms should diminish
during the early night.

Tuesday...

vfr. Scattered to broken cumulus with bases 5000-6000 feet.

Scattered showers and thunderstorms expected from midday through
the first part of Tuesday night. Showers and storms may bring
briefly lower conditions, mainly vsbys 3-5 miles in heavier
showers. Southwest winds will gust to at least 20 knots and
possibly as high as 30 knots.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Wednesday through Saturday ...

Thursday... Moderate confidence. MainlyVFR. Afternoon showers
possible in the interior with showers t-storms possible all sne thu
night. Gusty SW winds to 25-30 kt developing.

Friday... Moderate confidence. Patchy early morning stratus and fog,
especially south coastal ma ri, with local MVFR. ThenVFR, except
local ifr in possible thunderstorms, mainly during the afternoon and
evening hours.

Saturday... Moderate confidence.VFR, except local ifr in possible
thunderstorms, mainly during the afternoon and evening hours. Also
ifr ceilings fog possible south coastal ma ri.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Tuesday night ... High confidence.

Winds and seas mostly below small craft advisory thresholds
through the period with SW flow. A few gusts to 20 knots
expected with potential for a few gusts to 25 knots especially
nearshore.

Outlook Wednesday through Saturday ...

Wednesday... High confidence. Winds and seas below sca. Gusts to 20
kt possible nearshore waters and along southern outer coastal
waters.

Thursday... Moderate confidence. Small craft advisories will likely
be needed. Increasing and persistent SW winds with gusts around 25
kt probable, and gusts 30 kt possible, especially over nearshore
waters. Building seas may reach 5 to 7 ft over southern outer
coastal waters Thu night.

Friday... Moderate confidence. Persistent SW winds continue, with
potential gusts 25-30 kt. Seas of 5 to 7 feet may linger on the
southern outer coastal waters. Scattered thunderstorms, some with
reduced visibilities and strong gusty winds.

Saturday... Moderate confidence. SW S winds continue, with gusts 20-
25 kts. Seas 4-6 feet may linger on outer coastal waters.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Wtb nmb
near term... Wtb
short term... Wtb
long term... Nmb
aviation... Wtb nmb
marine... Wtb nmb


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 3 mi93 min 4.1 72°F 1015 hPa57°F
BZBM3 - 8447930 - Woods Hole, MA 10 mi48 min 67°F 69°F1015.2 hPa
44020 - NANTUCKET SOUND 17 mi88 min 66°F1 ft1015 hPa (-0.5)
44090 22 mi44 min 65°F1 ft
NTKM3 - 8449130 - Nantucket Island, MA 27 mi48 min SW 11 G 16 69°F 70°F1015.8 hPa
BUZM3 - Buzzards Bay, MA 31 mi78 min SW 15 G 16 65°F 1015.6 hPa (-0.6)
FRXM3 38 mi48 min 75°F 56°F
FRVM3 - 8447386 - Fall River, MA 38 mi48 min 76°F 74°F1015.1 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 38 mi48 min SSW 15 G 19 73°F 1013.4 hPa
NWPR1 - 8452660 - Newport, RI 45 mi48 min SSW 11 G 12 68°F 67°F1014.8 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi93 min SW 7 75°F 1014 hPa58°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi48 min WSW 6 G 12 74°F 1014.4 hPa
CPTR1 - 8452944 - Conimicut Light, RI 47 mi48 min SW 16 G 20 74°F 71°F1014.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 49 mi48 min SW 14 G 20 73°F 71°F1014.7 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
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
Last
24hr
SW6
G11
SW7
G10
SW5
G11
SW6
G9
SW4
G8
SW6
SW6
W2
G5
W4
W3
W3
W2
NW5
G8
NW7
G12
NW6
G9
NW4
G8
W4
G9
NW5
G9
SW8
SW7
G12
W9
G13
SW9
G14
SW8
G13
SW7
G15
1 day
ago
SW8
G14
W7
G10
W4
G9
W6
W4
W4
W4
G7
W4
G7
SW3
SW3
SW3
SE2
W3
W7
NW8
NW7
G10
N4
N5
W6
SW6
G9
SW8
G11
SW6
S6
SW7
2 days
ago
S11
G15
S10
G15
S9
G19
SW10
G14
SW8
G15
SW9
G18
SW9
G18
S10
G16
S9
G17
SW7
G19
SW7
G18
SW11
G17
SW9
G17
SW9
G15
SW11
G16
SW11
G17
SW10
G22
SW11
G16
SW10
G17
W8
G19
SW10
G18
W12
G17
W7
G14
W8
G15

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA8 mi23 minWSW 1410.00 miFair72°F53°F53%1015.2 hPa
Marthas Vineyard Airport, MA12 mi25 minSW 1210.00 miFair70°F57°F66%1015.5 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA14 mi22 minSSW 1410.00 miFair72°F55°F55%1014.6 hPa

Wind History from FMH (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
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
Last 24hrSW12
G18
W13SW10SW6SW10SW9W4CalmNW3CalmNW4W4W5NW8NW5
G13
NW7
G13
NW9W5
G13
W10W7
G14
W11SW14SW15
G22
SW16
1 day agoW11
G17
W7W10W8W63W3CalmCalmCalmCalmCalmCalmW8NW11W6W8NW6
G11
W11SW5
G13
S9
G15
SW12
G18
SW14SW12
2 days agoSW18
G27
SW20
G26
SW16
G25
SW14
G22
------------------------SW16
G22
SW14
G21
SW11W8
G14
--SW14W11
G17
SW10

Tide / Current Tables for Succonnesset Point, Nantucket Sound, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Succonnesset Point
Click for Map
Mon -- 02:04 AM EDT     2.46 feet High Tide
Mon -- 05:09 AM EDT     Sunrise
Mon -- 08:04 AM EDT     Moonrise
Mon -- 08:14 AM EDT     -0.38 feet Low Tide
Mon -- 02:45 PM EDT     2.15 feet High Tide
Mon -- 08:20 PM EDT     Sunset
Mon -- 08:28 PM EDT     -0.11 feet Low Tide
Mon -- 10:31 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.82.32.52.31.91.30.6-0-0.4-0.30.10.61.21.72.12.11.91.50.90.3-0.1-0.10.30.7

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Mon -- 02:27 AM EDT     -5.19 knots Max Ebb
Mon -- 05:09 AM EDT     Sunrise
Mon -- 05:38 AM EDT     0.23 knots Slack
Mon -- 08:04 AM EDT     Moonrise
Mon -- 08:46 AM EDT     4.95 knots Max Flood
Mon -- 12:12 PM EDT     -0.02 knots Slack
Mon -- 02:58 PM EDT     -4.81 knots Max Ebb
Mon -- 06:03 PM EDT     0.21 knots Slack
Mon -- 08:21 PM EDT     Sunset
Mon -- 09:01 PM EDT     4.58 knots Max Flood
Mon -- 10:32 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.7-4.4-5.1-5.1-4.3-2.82.144.84.94.63.71.6-3.1-4.4-4.8-4.4-3.4-0.83.24.34.64.33.5

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 (18,4,5,8)
      (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.