Tuesday, January28, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Yarmouth Port, MA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:55AMSunset 4:52PM Tuesday January 28, 2020 4:01 PM EST (21:01 UTC) Moonrise 10:12AMMoonset 9:35PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 211 Pm Est Tue Jan 28 2020
Rest of today..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Tonight..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Wed..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Wed night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Thu..N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft.
Thu night..NW winds around 5 kt, becoming W after midnight. Seas 2 to 3 ft.
Fri..SW winds 5 to 10 kt. Seas around 2 ft.
Fri night..SW winds around 5 kt. Seas around 2 ft. A chance of rain.
Sat..NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of rain.
Sat night..N winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 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 211 Pm Est Tue Jan 28 2020
Synopsis for massachusetts and rhode island coastal waters.. A weak cold front slides through today. High pressure nudges into the region from quebec province on Wednesday, then into new england Thursday into Friday. Coastal storm possible this 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 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 282046 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 346 PM EST Tue Jan 28 2020

SYNOPSIS. Skies will remain cloudy through tonight. With cold northerly winds, scattered ocean effect rain showers will pass across the mid and outer Cape to Nantucket. As temperatures fall tonight, the rain will change over to light snow showers with some light accumulations possible into early Wednesday morning before tapering off. Dry, quiet conditions with near normal temperatures are expected for the remainder of Wednesday and into Thursday. This high moves offshore Friday with temperatures moderating. Still watching a potential coastal storm which may impact our region Saturday/Sat night. Dry, blustery and colder weather likely follows Sunday into Monday.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. Through 00Z .

Will continue to see cloudy skies across the region in the overall cyclonic flow across the northeast. Light precip bands also continue to move S-SE across the eastern waters near and E of Cape Ann and Cape Cod. Some light precip is also moving across central Mass into N RI, though it remains dry in the lower levels so not expecting any precip to reach the ground there or, if it does, it will be brief and very light.

May see the light rain band E of the outer Cape begin to expand westward this evening. Have mentioned scattered rain showers possibly reaching Chatham to Wellfleet and Truro by around 00Z.

Tonight .

The majority of the model suite, especially the high res short range models, have continued to signal the ocean effect band to become better organized this evening E of Cape Cod, then shift southwestward through around midnight or so. The rain early this evening will change over to snow showers as temps fall back to the lower 30s.

The best chance for any light snow accumulations will occur across the outer arm of the Cape, but not expecting much more than an inch in isolated spots, if that. Possible to see a dusting of snow as far W as Hyannis. Also noting some possible snow showers developing across the E slopes of the Berkshires as another weak mid level short wave moves across. Should see any precip taper off after 06Z- 08Z, though might linger across the outer Cape until around daybreak.

Across the remainder of the interior, where dry conditions are expected, skies will begin to clear after midnight. Northerly winds will continue to 5-10 mph.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/. Wednesday and Wednesday night .

Clouds across east coastal areas will shift SE as high pressure slowly builds out of southern Ontario to central Quebec during Wednesday. Overall, expect a mostly sunny day. Expect high temps to be close to seasonal levels for late January, mainly from 30 to 35 across the higher terrain to the upper 30s to near 40 across the coastal plain. It will feel chilly, though, as north winds at 10-15 kt will bring wind chill values down to the 20s.

The high will remain across Quebec Wednesday night, but any leftover pressure gradient will relax. So, expect mainly clear skies across most areas with light northerly winds. Some clouds may linger across SE Mass as well as Cape Cod and the islands. It will be a cold night, however, with temperatures bottoming out in the single digits to the mid teens inland, ranging to the upper teens to mid 20s along the shoreline. These readings will run up to 5 degrees below seasonal normals inland.

LONG TERM /THURSDAY THROUGH TUESDAY/. Highlights .

* Mainly dry Thu into Fri with near to slightly below normal temperatures rebounding above normal by Fri

* Still monitoring for a potential storm Saturday/Sat night, but forecast confidence remains very low on details

* Mainly dry with above normal temperatures early next week

Details .

Large high pressure late this week should lead to dry weather. Near to below normal temperatures expected Thursday, until this high pressure passes by our region into Friday. Then temperatures are once again expected to be above normal.

Still monitoring the potential for a coastal storm sometime this weekend. The energy expected to be a part of this system should move over western North America tonight into tomorrow. Expecting most of the details to emerge from the noise over the next couple of days. There remains a large degree of spread in the ensemble solutions, so it is important to not lock in on a singular operational model run at this time.

The general idea from the 28/12Z guidance is for a low pressure to move northeast along the eastern Seaboard Saturday into Sunday. Still some question as to how close this low pressure tracks to southern New England, as well as when does it strengthen. The consensus solution is for a farther offshore track, with the strengthening occurring after this low passes us by. Only the operational GFS significantly deepened the low pressure closer to our region.

At this point, will continue to mention a broad period with a chance of rain and/or snow. Expecting changes with the details in later forecasts. This remains a low confidence portion of the forecast.

A drying trend should follow Sunday into early next week behind this departing cyclone. Thinking above normal temperatures for this portion of the forecast.

AVIATION /21Z TUESDAY THROUGH SUNDAY/. Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

18Z Update .

Through 00Z .

VFR conditions at most locations, with CIGS mainly from 3500 to 5000 ft. However, a few terminals have MVFR CIGS such as KORH and close at KIJD at 3100 ft. CIGS at a few more interior terminals may lower to 2500-3000 at times through the remainder of the afternoon, then CIGS may lower to MVFR toward nightfall across the outer Cape. Scattered ocean effect rain showers may push into the mid and outer Cape and Nantucket late this afternoon with local VSBYS reduced to around 3SM.

Tonight .

VFR across most locations. MVFR CIGS develop across the eastern slopes of the Berkshires and across central and eastern Cape Cod as well as Nantucket. Best chance for MVFR CIGS and local MVFR VSBYS is across Cape Cod and Nantucket where scattered ocean effect rain and/or snow showers may fall.

Wednesday .

Any isolated snow showers across outer Cape Cod early will end with local MVFR CIGS/VSBYS through 13Z-14Z. Otherwise, expect VFR conditions. N-NW winds 10-15 kt, highest along E coastal terminals.

Wednesday night .

VFR conditions. Light N winds. Good visibility.

KBOS Terminal . High confidence in TAF through 00Z, then moderate confidence as MVFR ceilings move in across the mid and outer sections of Cape Cod into Nantucket and develop across N central/W Mass tonight.

KBDL Terminal . High confidence in TAF.

Outlook /Thursday through Sunday/ .

Thursday through Friday: VFR.

Friday Night: VFR. Slight chance SN.

Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance RA, with a slight chance SN.

Saturday Night: Mainly VFR, with local MVFR possible. Breezy. Chance SN or RA.

Sunday: VFR. Breezy. Chance SN, with a slight chance RA.

MARINE. Short Term /through Wednesday Night/ . High confidence.

Through 00Z . N-NW winds 10 to 15 kt with gusts up to 20 kt. Scattered rain showers across the eastern waters from E of Cape Ann to Cape Cod and Nantucket, dry elsewhere. Seas 4 ft or less. Visibility may lower to 3 miles in any showers. Good visibility elsewhere.

Tonight . Winds becoming N 10 to 15 kt. Seas 3 to 4 ft. Scattered rain/snow showers across the eastern waters from east of Boston Harbor to near and east of Cape Cod and Nantucket. Visibility of 1 to 3 miles in precipitation. Good visibility elsewhere.

Wednesday . NW winds 10 to 15 kt gusts increasing to 15 to 20 kt during the afternoon. Seas 3 to 4 ft, approaching 5 ft across the eastern waters. Good visibility.

Wednesday night . N winds 10 to 15 kt. Gusts up to 20 kt and seas building up to 5 to 6 ft on the eastern outer waters. Good visibility.

Outlook /Thursday through Sunday/ .

Thursday: Winds less than 25 kt. Local rough seas.

Thursday Night: Winds less than 25 kt. Seas locally approaching 5 ft.

Friday: Winds less than 25 kt.

Friday Night: Winds less than 25 kt. Chance of rain or snow.

Saturday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Chance of rain.

Saturday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Chance of rain, with a slight chance of snow.

Sunday: Winds less than 25 kt. Areas of rough seas. Chance of rain, with a slight chance of snow.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . None.

SYNOPSIS . Belk/EVT NEAR TERM . EVT SHORT TERM . EVT LONG TERM . Belk AVIATION . Belk/EVT MARINE . Belk/EVT


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 mi31 min 39°F2 ft
44020 - NANTUCKET SOUND 15 mi61 min 12 G 16 1006.5 hPa
WAXM3 - Waquoit Bay Reserve, MA 15 mi76 min WNW 7 39°F 1006 hPa23°F
BZBM3 - 8447930 - Woods Hole, MA 24 mi121 min 39°F 39°F1006.3 hPa
NTKM3 - 8449130 - Nantucket Island, MA 31 mi43 min 38°F 40°F1006.8 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 35 mi71 min WNW 9.7 G 14 37°F 3 ft1006 hPa (-0.0)24°F
BUZM3 - Buzzards Bay, MA 45 mi61 min NNW 14 G 16 39°F 1007.3 hPa (-0.0)
FRVM3 - 8447386 - Fall River, MA 46 mi49 min 39°F 40°F1007.4 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 47 mi43 min 40°F 1007.3 hPa
FRXM3 47 mi49 min 39°F 23°F
44013 - BOSTON 16 NM East of Boston, MA 48 mi71 min NW 18 G 21 38°F 42°F3 ft1005.6 hPa (-0.5)25°F

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last
24hr
W6
G11
W4
G8
W7
G12
W5
G9
W5
G10
W4
G7
W4
G8
W6
G10
W6
G10
NW5
G11
NW7
G13
NW8
G12
NW7
G12
NW7
G11
NW7
G13
NW6
G11
NW6
G12
NW10
G14
NW10
G14
N9
G16
N10
G14
N9
G13
N10
G16
N7
G12
1 day
ago
SW7
G12
W7
G14
SW7
G11
W7
G12
W6
SW4
W6
G9
W5
G9
W5
G9
W6
G9
W4
W2
W5
G8
W4
G7
SW4
G7
W3
W6
G10
SW7
G14
W6
G14
W10
G17
W10
G16
W11
G16
W9
G20
W7
G15
2 days
ago
E14
G19
E17
G21
E17
G24
SE17
G25
SE15
G27
SE11
G19
SE10
G17
SE9
G20
S7
G13
W3
G9
W5
G9
SW3
G7
SW6
G10
W4
G10
W5
G10
W8
G12
W9
G17
W8
G17
W7
G17
W8
G17
W11
G17
W11
G18
W9
G19
W5
G15

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hyannis, Barnstable Municipal-Boardman Airport, MA2 mi65 minN 810.00 miOvercast39°F25°F57%1006.1 hPa
Otis Air National Guard Base, MA13 mi76 minN 510.00 miOvercast37°F21°F52%1006.8 hPa
Chatham, Chatham Municipal Airport, MA16 mi69 minNW 410.00 miOvercast39°F27°F62%1006.7 hPa
Provincetown Municipal Airport, MA21 mi65 minNW 810.00 miOvercast38°F25°F60%1006.7 hPa

Link to 5 minute data for KHYA

Wind History from HYA (wind in knots)
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
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last 24hrW8W9W7W5--W5W6W6W9NW6NW8NW5NW9W7NW7NW6NW8NW7
G15
N13
G18
NW10
G22
N12
G19
N8N6N8
1 day agoSW11SW8W7W4W4W3SW4W5SW6SW5CalmCalmSW5SW4SW7SW7SW10W11SW7SW11SW9W12W13
G17
W15
G21
2 days agoE13
G26
E13
G25
E14
G22
E12
G22
E10
G22
SE12
G19
SE10
G20
SE9
G17
SW16
G21
SW7W11SW5S5S6SW7SW7W10W14W10W7W11SW13SW14SW12

Tide / Current Tables for Barnstable Harbor, Beach Point, Massachusetts
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Barnstable Harbor
Click for Map
Tue -- 01:31 AM EST     9.20 feet High Tide
Tue -- 06:57 AM EST     Sunrise
Tue -- 07:47 AM EST     0.77 feet Low Tide
Tue -- 09:12 AM EST     Moonrise
Tue -- 01:39 PM EST     9.94 feet High Tide
Tue -- 04:50 PM EST     Sunset
Tue -- 08:15 PM EST     0.17 feet Low Tide
Tue -- 08:35 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
7
pm
8
pm
9
pm
10
pm
11
pm
7.799.18.26.64.72.71.20.81.93.75.98.19.69.997.45.33.21.20.20.62.14.1

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Tue -- 02:27 AM EST     -4.20 knots Max Ebb
Tue -- 05:29 AM EST     0.19 knots Slack
Tue -- 06:58 AM EST     Sunrise
Tue -- 08:27 AM EST     3.99 knots Max Flood
Tue -- 09:13 AM EST     Moonrise
Tue -- 11:43 AM EST     -0.13 knots Slack
Tue -- 02:42 PM EST     -4.49 knots Max Ebb
Tue -- 04:52 PM EST     Sunset
Tue -- 05:52 PM EST     0.20 knots Slack
Tue -- 08:36 PM EST     Moonset
Tue -- 08:55 PM EST     4.19 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
7
pm
8
pm
9
pm
10
pm
11
pm
-1.5-3.4-4.1-4.1-3.4-2.12.13.43.93.93.42.4-1.6-3.4-4.3-4.5-4-2.81.13.144.23.93.3

Weather Map
       (on/off)   Help Weather Map
wmap_A
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (16,3,4,5)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerous 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.