Monday, March27, 2017 L-36.com


Marine Weather and Tides
Yarmouth Port, MA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:29AMSunset 7:03PM Monday March 27, 2017 6:35 AM EDT (10:35 UTC) Moonrise 6:27AMMoonset 6:39PM Illumination 0% Phase: New Moon; Moon at 29 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
ANZ231 Cape Cod Bay- 411 Am Edt Mon Mar 27 2017
Today..SE winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. Patchy fog. A chance of rain this morning...then rain this afternoon. Vsby 1 to 3 nm...decreasing to 1 nm or less this afternoon.
Tonight..SW winds 5 to 10 kt...becoming nw after midnight. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 nm or less.
Tue..E winds around 5 kt. Seas 1 foot or less. Patchy fog. A chance of showers. Vsby 1 nm or less.
Tue night..E winds around 5 kt...becoming ne around 5 kt after midnight. Seas 1 foot or less. Patchy fog. Showers likely. Vsby 1 nm or less.
Wed..N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Wed night..N winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Thu..N winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Thu night..N winds 5 to 10 kt. Seas 2 to 3 ft.
Fri..NE winds 5 to 10 kt. Seas 1 foot or less. A chance of rain.
Fri night..SE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Rain likely. 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 411 Am Edt Mon Mar 27 2017
Synopsis for massachusetts and rhode island coastal waters.. A warm front moves into the waters today. Another low tracks across srn new england tonight. Strong high pres over quebec builds S into new england Wed into 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 Yarmouth Port, MA
   Hourly   EDIT   Help
location: 41.71, -70.29     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbox 270803
afdbox
area forecast discussion
national weather service taunton ma
403 am edt Mon mar 27 2017

Synopsis
High pressure over marine will retreat into the maritimes, but
provide cool weather across southern new england today. A warm
front will approach the region during this time and result in
periods of rain with areas of freezing rain across the high
terrain. Wet weather continues Tue and Tue night as low pressure
tracks over or near the region. Although Tue should be milder
than Monday. High pressure brings dry but chilly weather Wed and
thu. More unsettled weather is possible late Fri into sat.

Near term /through today/
Continuing to monitor progress of main area of precipitation
toward southern new england. Temperatures at elevations about
700 feet and higher were near freezing, so will continue the
freezing rain advisory this morning. Low dew point depressions,
so additional cooling is possible with the main area of
precipitation arrives. Temperatures still expected to rise above
freezing by 8 am, ending the threat of freezing rain.

A warm front will try to push north into southern new england
later today. A low pressure moving along this front will prevent
it from completely doing so. This will provide a focus for
periods of widespread rain.

Not much sunshine today, but temperatures should be near normal.

Short term /tonight through 6 pm Tuesday/
Tonight...

abundant clouds linger. Lots of low level moisture in the lowest
3,000 feet above the ground in the wake of a low pressure moving
offshore. As previously mentioned, cannot completely rule out
some patchy drizzle. Still not expecting temperatures to fall
much, even with a weak cold front moving through.

Tuesday...

not a lot of sunshine anticipated, despite southern new england
getting into the warm sector of a low pressure in southeast
canada. MAX temperatures should be above normal, in the upper
40s and 50s. Could be warmer if clouds and rainfall are delayed
until late in the day. Low risk of a isolated thunderstorm or
two toward the south coast due to elevated instability.

Long term /Tuesday night through Sunday/
Highlights...

* showers linger Tuesday night as cold front passes through
* cooler but dry weather for Wed and thurs
* unsettled weather returns Friday into Saturday
pattern overview...

00z model consensus continues to show an active weather pattern
for the period. Split flow aloft will continue through the
period with a few shortwaves moving through the flow. Partial
phasing of the two streams will occur across the great lakes and
northeast on Tuesday. This will result in the development of a
low pressure system east of the region late Tuesday into
Wednesday. High pressure and upper level ridge will follow
Thursday into early Friday. The next upper level low/trough
deamplifies as it moves into the mid/upper ridge axis across the
eastern u.S. A coastal low is forecast to develop and quickly
move east in the aforementioned region of this phasing. The
spread has decreased for this timeframe but the still question
in strengthen and location of this system will determine p-types
and QPF amounts.

Details...

Tuesday night... High confidence.

Weak shortwave will move over the region on Tuesday with surface
low pressure over northern new england. Along the cold front,
guidance develops a secondary low pressure system just south of
southern new england by Tuesday night. This wave of low pressure
will bring showery weather Tuesday evening into the overnight
hours. Cannot rule out some isolated thunder with this system as
tt increase above 50 and li's drop below 0. This is strongest
in the conservative ec.

Precip chance will quickly come to an end from west to east
during the overnight hours as CAA takes a hold of the region.

Wednesday into Friday... High confidence.

Trough overhead as upper level low deepens as it moves towards
the canadian maritimes. This puts the region in northwest flow
through the period resulting in dry but breezy conditions.

Clouds may be stubborn on Wed over the CAPE and islands given
northerly flow across the waters. In fact could have some ocean
effect rain/snow showers over the outer cape! Despite cold
advection, the environment should be well mixed, so max
temperatures will be close to normal.

Northwest flow continues on Thursday with an area of high
pressure building in new england. Anticipate increasing
sunshine and lighter winds. Dry and seasonable conditions should
persist through Friday with high pressure in control.

Friday night into the weekend... Low confidence.

Split flow remains over the region with the next southern stream
wave interacting with the northern stream. Still some model
spread in this system leading to a low confidence forecast. The
ec has become more progressive with this approaching coastal low
developing it over 1-95 while the GFS keeps the system
suppressed. The UKMET is more inbetween the two systems, but the
gefs and eps continue to show the system south of sne. Overall
a chilly rain with potential for wet snow/sleet at times on the
northern portion of the precip shield. All guidance suggest
system should be or moving offshore by Sunday, thus drying trend
possible second half of the weekend.

Aviation /07z 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.

Today... Fzra risk diminishes early. Otherwise, -ra/ra with
MVFR-lifr CIGS with light E winds initially turning SE and
increasing.

Tonight... Ra diminishing, however ifr-lifr CIGS remain. Could
see areas of -dz. Light winds.

Tuesday... MVFR conditions likely in areas of rain and fog, with
a trend lowering to ifr as frontal boundary and surface low
approach. Low risk for thunder toward the south coast.

Kbos taf... Not expecting any fzra impacts at the terminal with
e onshore flow. Lowering MVFR down to lifr this morning.

Kbdl taf... Not expecting any fzra impacts at the terminal, as
temperatures remain above freezing.

Outlook /Tuesday night through Friday/...

Tuesday night... High confidence. MVFR conditions within any passing
rain showers with improving CIGS toVFR by the morning hours. Low
risk for thunder across the south coast.

Wednesday into Thursday... High confidence. Gusty n/w winds
Wednesday withVFR conditions into Thursday.

Friday... Moderate confidence. VFR and dry to start but likely
lowering to MVFR or possibly ifr Fri night in rain/wintry precip.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term /through Tuesday/... Moderate confidence.

Today... Warm front will lift across the waters, resulting in an
increasing east to southeast flow. Rough seas across the
eastern outer coastal waters are more likely than the southern
outer waters. Continued the small craft advisories for those
waters. A few gusts to 25 kt are also possible across CAPE cod
bay and nantucket sound. Have less confidence across those
waters, so did not expand an advisory there. That will need to
be monitored as the day progresses.

Tonight... A weak frontal boundary sweeps the waters, with light
west winds developing. This will allow seas to subside and small
craft advisories to conclude.

Tuesday... Light south winds with frontal boundary north of the
region. Vsby reduced at times in rain and fog.

Outlook /Tuesday night through Friday/...

Tuesday night... Moderate confidence. Winds becoming northeast late
tue night as front slips south and wave of low pres tracks along the
front south of new england. Vsby reduced at times in rain and fog.

Wednesday into Thursday... High confidence. Gusty north winds near
Wednesday into early Thu then diminishing as high pressure builds
into the area later thu.

Friday... High confidence. Quiet weather with high pressure over the
area early fri. However increasing east-southeast winds Fri night as
low pres approaches from the west. Also vsby lowering in rain and
fog Fri night.

Box watches/warnings/advisories
Ct... None.

Ma... Freezing rain advisory until 8 am edt this morning for
maz002>004-008-009-012-026.

Ri... None.

Marine... Small craft advisory until 2 am edt Tuesday for anz250-254.

Small craft advisory until 11 pm edt this evening for anz255-
256.

Synopsis... Belk/dunten
near term... Belk
short term... Belk
long term... Dunten
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
44090 9 mi32 min 37°F1 ft
WAXM3 - Waquoit Bay Reserve, MA 15 mi111 min 39°F 38°F
44020 - NANTUCKET SOUND 20 mi46 min 38°F2 ft1024.1 hPa (-2.3)
BZBM3 - 8447930 - Woods Hole, MA 24 mi48 min 38°F 37°F1024 hPa
NTKM3 - 8449130 - Nantucket Island, MA 31 mi48 min ESE 12 G 16 41°F 39°F1024.1 hPa
BUZM3 - Buzzards Bay, MA 45 mi36 min ENE 13 G 14 38°F 1024.1 hPa (-2.1)
FRVM3 - 8447386 - Fall River, MA 46 mi48 min 38°F 39°F1024.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 47 mi48 min E 5.1 G 7 38°F 1024.5 hPa
FRXM3 47 mi162 min 37°F 34°F
44013 - BOSTON 16 NM East of Boston, MA 48 mi46 min E 12 G 14 39°F 40°F2 ft1024.9 hPa (-1.9)

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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
6
AM
Last
24hr
N6
NE9
G12
NE10
E16
G22
E19
E13
G17
E15
G19
NE13
G17
E10
G15
E10
G16
E11
G14
E11
G15
E12
G15
E10
G13
E9
G13
E9
G13
E10
G14
E11
G15
E9
G15
E11
E9
G12
E10
E12
G15
E10
G16
1 day
ago
W4
G8
NW8
NW6
N10
G13
NE5
G10
NE11
NE10
NE10
G13
N7
G11
N14
G20
NE8
E3
N8
G13
NE8
G12
N6
N4
N5
N6
G9
N4
G7
N4
G8
NE3
N4
G7
N4
G7
N4
G7
2 days
ago
SW3
S2
S5
G10
S6
G14
S9
G14
S9
G15
S11
G16
S9
G15
S9
G14
S7
G18
S10
G17
S9
G18
SW8
G16
SW13
G19
SW11
G18
SW11
G14
SW9
G17
SW9
G17
SW9
G17
SW10
G15
W10
G18
SW6
G11
W6
G12
W6
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hyannis, Barnstable Municipal-Boardman Airport, MA2 mi40 minE 79.00 miOvercast40°F37°F93%1023.9 hPa
Otis Air National Guard Base, MA13 mi41 minno data6.00 miFog/Mist39°F37°F93%1024.7 hPa
Chatham, Chatham Municipal Airport, MA16 mi44 minESE 106.00 miFog/Mist41°F39°F93%1025.4 hPa
Provincetown, Provincetown Municipal Airport, MA21 mi40 minSE 79.00 miOvercast39°F37°F96%1025 hPa

Wind History from HYA (wind in knots)
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
6
AM
Last 24hrNE4NE6E9NE12
G17
E11E10E8E9SE9
G15
E8E7E6E5E6E6E746E6E4E5E5E8E7
1 day agoCalmN5NE7N9N8NE8NE11NE10N11N9N7N8N8
G14
N6N3N3N4CalmN5N4NE5N3CalmN3
2 days agoCalmS4S5S12S10
G16
S12S8S10S11
G18
S14
G21
S13
G19
S14
G19
SW14
G24
SW19SW21
G27
SW18
G26
SW21
G28
SW15
G23
W6SW12W8W6W7W5

Tide / Current Tables for Barnstable Harbor, Beach Point, Massachusetts
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Barnstable Harbor
Click for Map
Mon -- 05:46 AM EDT     -0.40 feet Low Tide
Mon -- 06:27 AM EDT     Moonrise
Mon -- 06:32 AM EDT     Sunrise
Mon -- 11:39 AM EDT     10.83 feet High Tide
Mon -- 06:11 PM EDT     -0.82 feet Low Tide
Mon -- 06:39 PM EDT     Moonset
Mon -- 07:01 PM EDT     Sunset
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
108.76.74.31.90.1-0.313.368.710.510.89.77.75.22.60.4-0.8-0.224.77.59.9

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Mon -- 12:29 AM EDT     -4.56 knots Max Ebb
Mon -- 03:33 AM EDT     0.20 knots Slack
Mon -- 06:28 AM EDT     Moonrise
Mon -- 06:33 AM EDT     Sunrise
Mon -- 06:33 AM EDT     4.38 knots Max Flood
Mon -- 09:51 AM EDT     -0.17 knots Slack
Mon -- 12:48 PM EDT     -4.81 knots Max Ebb
Mon -- 03:54 PM EDT     0.02 knots Slack
Mon -- 06:40 PM EDT     Moonset
Mon -- 06:58 PM EDT     4.62 knots Max Flood
Mon -- 07:02 PM EDT     Sunset
Mon -- 10:21 PM EDT     -0.21 knots Slack
Mon -- 10:59 PM EDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-4.5-4.5-3.8-2.32.13.64.34.33.92.8-1.3-3.5-4.6-4.8-4.3-3.113.44.34.64.43.62-2.7

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 (6,6,7,8)
      (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.