Sunday, September20, 2020
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Marine Weather and Tides
West Falmouth, MA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:28AMSunset 6:45PM Sunday September 20, 2020 7:35 AM EDT (11:35 UTC) Moonrise 10:11AMMoonset 8:55PM Illumination 10% 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
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ANZ234 Buzzards Bay- 716 Am Edt Sun Sep 20 2020
.small craft advisory in effect through late Monday night...
Today..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Tonight..NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Mon..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Mon night..N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Tue and Tue night..NW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 3 ft.
Wed through Thu night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 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 716 Am Edt Sun Sep 20 2020
Synopsis for massachusetts and rhode island coastal waters.. High pressure builds over the northeast through Monday. Hurricane teddy will pass well east of southern new england Mon into Tue. Mariners are urged to keep up to date with the latest forecasts as this has the potential to be a very dangerous situation for mariners, especially east of the provincetown to nantucket areas. 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 West Falmouth, MA
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location: 41.61, -70.72     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 201127 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 727 AM EDT Sun Sep 20 2020

SYNOPSIS.

Cooler than normal and dry weather persists into early next week. Hurricane Teddy will pass nearly 400 miles east of our coastline on Tuesday as it heads north into the Canadian Maritimes. While we will remain dry, it will bring a period of windy conditions along the coast, especially Cape Cod and Nantucket. Minor coastal flooding and some beach erosion may also occur during the Tuesday afternoon high tide. Otherwise, the prolonged period of dry weather continues right through the upcoming week. Temperatures will moderate to above normal levels by Wednesday and that will continue for the rest of the week.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

725 AM update .

* Freeze/Frost Advisories will likely be needed again for tonight . * Some splashover possible along the MA east coast at high tide

Strong high pressure over southern Quebec/northern New York/and northern New England will provide a mainly sunny but chilly day today here in southern New England. Just some mid and high level cloudiness floating through as an upper level trough moves through. A few ocean-effect stratocumulus clouds formed overnight and were affecting portions of Cape Cod and the islands. These should move south and/or dissipate by mid morning.

Winds will be from the north to northeast and become rather gusty from 15 to 25 mph along the east and southeast coast of MA. Gusts from 25-30 mph are possible over Nantucket. It will be quite chilly today, with 850 mb temps of only 0C to -1C. The record low maximum temperature for Boston is 58 degrees set back in 1960 . and this could be matched or broken. Highs will generally be in the lower 60s but some locations may only reach the upper 50s.

The astronomical tide is forecast to be 11.7 ft MLLW at Boston this afternoon, which is high, but a surge of only 0.3 ft is anticipated. This may cause some splashover at the usual places, but felt that it would not be widespread or significant enough to warrant a Coastal Flood Statement.

A High Surf Advisory is in effect along the MA and RI coasts.

There remains an elevated fire weather potential due to the persistent dry weather and somewhat gusty winds, especially in southeastern areas.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/.

Tonight and Monday .

High pressure over northern New England tonight retreats westward into New York State Monday. The result is more of the same weather. Dry, mainly clear conditions. That sets the stage for good radiational cooling tonight. Additional freeze and frost warnings will be needed again, in roughly the same region. We will assess which zones already received a freeze tonight before issuing the warnings/advisories. We are forecasting lows ranging from 30-33 in western MA . to the mid and upper 30s elsewhere, except 40 to 45 in Boston, Providence, Cape Cod, and Nantucket Monday will be a few degrees warmer. with highs mainly from 60-65, but still a little below normal. Northeast winds will be gusty again along the east and south coasts, with up to 30 mph possible on Nantucket.

High Surf Advisory remains posted through the period.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/.

Highlights .

* Hurricane Teddy passes well to our east Tue keeping us dry, but bringing windy weather at the coast especially Cape/Nantucket

* Minor coastal flooding/beach erosion likely during the Tue afternoon high tide along the eastern MA coast & Cape/Nantucket

* Above normal temperatures return Wed and persist through the end of this week

* Prolonged dry weather continues with little if any rainfall expected for the entire week

Details .

Monday night .

High pressure in control will result in one more chilly night across the region. Low temps will be down into the 30s to the lower 40s in many locations with frost again likely in the normally cooler outlying locations. Temperatures may begin to rise toward morning across the Cape/Islands as winds pick up given increasing pressure gradient from Hurricane Teddy.

Tuesday .

Hurricane Teddy will be passing nearly 400 miles east of our coastline on Tue as it heads towards the Canadian Maritimes. Teddy will pass too far to the east of southern New England to bring any rain. That being said, a high pressure system centered over northern New England combined with Teddy will result in a windy day along the coast. This is especially true across parts of the Cape/Nantucket, where a period of northerly wind gusts of 40 to 50 mph are possible. Elsewhere, it will not be as windy although still breezy with 20 to 30 mph wind gusts likely. High temperatures should recover into the 65 to 70 degree with plenty of sunshine.

High Surf along with minor coastal flooding/beach erosion are anticipated during the Tuesday afternoon high tide cycle. Please see our Tides/Coastal Flood Section for more information.

Wednesday through Saturday .

Hurricane Teddy will lift into the Canadian Maritimes on Wednesday. The result will be more of a milder westerly flow of air aloft and at the surface. The EPS/GEFS are in agreement in above normal 2 meter temperature anomalies for the second half of the week. Therefore, we expect above normal temperatures to return Wednesday and persist through the end of the week. High temperatures should reach well into the 70s and depending on the amount of solar insolation/timing we could be 80+ for a day or two in some locations.

The other main story will be the continued prolonged stretch of dry weather. Little if any rain is expected this entire week. We may see a few brief showers Thu night/Fri with a weak cold front, but moisture/instability is lacking. Therefore, any rainfall we see would be short-lived and light.

AVIATION /12Z SUNDAY THROUGH THURSDAY/. Forecaster Confidence Levels .

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

12Z update .

Today . High confidence.

VFR. A few clouds around 4000-6000 ft through mid morning over Cape Cod and the islands. Otherwise, just some a few mid/high clouds. NNE winds gusting to 20-25 kt along the coast, with up to 30 kt gusts possible over outer Cape Cod and Nantucket.

Tonight and Monday . High confidence.

VFR with clear skies and light winds across the interior. Will remain gusty across Cape Cod and the Islands, with winds out of the NE with speeds of 15-20 kts and gusts of 25-30 kts.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF. Outlook /Monday Night through Thursday/ .

Monday Night: VFR. Windy with local gusts up to 30 kt.

Tuesday: VFR. Strong winds with gusts up to 45 kt.

Tuesday Night: VFR. Strong winds with areas of gusts up to 45 kt.

Wednesday through Thursday: VFR. Breezy.

MARINE.

415 AM update .

*Small Craft Advisories continue through Monday night .

A very rough period is in store for the marine community. Mariners should pay close attention to the forecast. Rough seas from 5 to 9 ft will persist on NE winds today, which will gust up to 20-30 kt today, highest in southeastern waters. By tonight, seas build to 8 to 10 ft over the outer waters. The seas will be 5 to 6 ft at the entrance to Boston Harbor and at the entrance to Narragansett Bay. The same is true for Monday, with slightly higher seas . up to 10 to 12 ft southeast of Nantucket. Seas will then build further, as mentioned below.

Outlook /Monday Night through Thursday/ .

* Distant Hurricane Teddy will bring dangerously high seas & strong northerly wind gusts across our eastern MA coastal waters Tue

Hurricane Teddy will be passing nearly 400 miles east of our coastline on Tue. Nonetheless, very high seas on the order of 12 to 18 feet will likely develop across our eastern waters along with a period of Northerly Gale Force Wind gusts of 35 to 45 knots. There is even a low probability for 50 knot gusts east of the Provincetown to Nantucket areas. We continue with a Marine Weather Statement to highlight this concern for Mariners, especially those headed east into the open Atlantic.

Winds and seas diminish Wed with further improvement on Thu as a ridge of high pressure builds south of the waters.

FIRE WEATHER.

We continue with the special weather statement today at the request of our fire weather partners. The unusually prolonged stretch of dry weather continues and minimum RH values will drop to between 25 and 35 percent across much of the region this afternoon. It will be a bit gusty near the coastline too.

While Monday may have similar conditions as today, there are even greater fire weather concerns on Tue. Distant Hurricane Teddy should generate 20 to 30 mph wind gusts over most areas but up to 40 to 50 mph for Cape Cod and Nantucket. Something we will have to watch, with low afternoon RH values.

TIDES/COASTAL FLOODING.

High astronomical MLLW tides of 11.7 ft this afternoon and 11.6 feet on Monday afternoon may result in some nuisance splashover/beach erosion along the eastern MA coast given gusty NE winds.

There is more concern on Tuesday as distant Hurricane Teddy results in some pressure falls and the potential for northerly wind gusts of 40 to 50 mph across the Cape/Nantucket. This combined with highs seas offshore may result in pockets of minor coastal flooding along the eastern MA coast. This is especially true on the north facing coastline across Cape Cod Bay and Nantucket Sound given the wind trajectory and the potential for a 1-2 foot storm surge. While we are not expecting a significant coastal flood event, inundation on vulnerable shoreline roadways may occur within a few hours of the high tide along with beach erosion. This will likely require the eventual need for a Coastal Flood Advisory for Tuesday.

CLIMATE. Sun, Sep 20 . Current record daily coldest high temperatures and year.

BOS 58F (1960) BDL 58F (1982) ORH 53F (1987) PVD 56F (1972)

BOX WATCHES/WARNINGS/ADVISORIES. CT . Frost Advisory until 8 AM EDT this morning for CTZ002>004. MA . High Surf Advisory until 8 PM EDT Tuesday for MAZ007-019-020- 022>024. Frost Advisory until 8 AM EDT this morning for MAZ005-006-012- 013-017-018-026. Freeze Warning until 8 AM EDT this morning for MAZ002>004- 008>011. RI . High Surf Advisory until 8 PM EDT Tuesday for RIZ006>008. Frost Advisory until 8 AM EDT this morning for RIZ001. MARINE . Small Craft Advisory until 6 AM EDT Tuesday for ANZ231>235-237- 250-251-254>256.

SYNOPSIS . GAF/Frank NEAR TERM . Frank/GAF SHORT TERM . GAF LONG TERM . Frank AVIATION . GAF/Frank MARINE . GAF/Frank FIRE WEATHER . Frank TIDES/COASTAL FLOODING . Frank CLIMATE . Chai


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BZBM3 - 8447930 - Woods Hole, MA 6 mi47 min 54°F 67°F1030.4 hPa
WAXM3 - Waquoit Bay Reserve, MA 11 mi50 min W 1 47°F 1030 hPa40°F
BUZM3 - Buzzards Bay, MA 22 mi35 min N 20 G 22 1031.1 hPa (+1.6)
FRVM3 - 8447386 - Fall River, MA 24 mi47 min 47°F 67°F1031.7 hPa
FRXM3 25 mi47 min 47°F 35°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 25 mi47 min NNE 7 G 8.9 48°F 1031.7 hPa
44020 - NANTUCKET SOUND 25 mi25 min NNE 18 G 21 67°F
44090 26 mi38 min 62°F4 ft
PRUR1 31 mi47 min 49°F 35°F
NAXR1 - Narragansett Bay Reserve, RI 33 mi50 min NNE 12 48°F 1031 hPa36°F
NWPR1 - 8452660 - Newport, RI 33 mi47 min NNE 8.9 G 19 50°F 64°F1031.2 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 33 mi47 min NNE 9.9 G 16 49°F 1032.1 hPa
CPTR1 - 8452944 - Conimicut Light, RI 34 mi47 min 48°F 64°F1031.6 hPa
QPTR1 - 8454049 - Quonset Point, RI 36 mi47 min N 13 G 17 49°F 66°F1031.6 hPa
PVDR1 37 mi47 min N 11 G 13 47°F 1032 hPa31°F
FOXR1 - 8454000 - Providence, RI 39 mi47 min NE 9.9 G 12 47°F 65°F1031.9 hPa
NTKM3 - 8449130 - Nantucket Island, MA 40 mi47 min NNE 11 G 17 57°F 62°F1029.2 hPa
CHTM3 41 mi47 min NNE 15 G 21 56°F 58°F1029.6 hPa
44097 - Block Island, RI (154) 49 mi69 min 67°F6 ft

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA11 mi50 minNNE 610.00 miMostly Cloudy54°F39°F58%1030.1 hPa
New Bedford, New Bedford Regional Airport, MA14 mi42 minNNW 410.00 miFair43°F34°F71%1030.9 hPa
Marthas Vineyard Airport, MA15 mi42 minN 610.00 miFair53°F41°F64%1029.9 hPa
Plymouth, Plymouth Municipal Airport, MA21 mi43 minNNW 510.00 miA Few Clouds45°F37°F77%1031.2 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA24 mi39 minNNE 9 G 1610.00 miFair54°F39°F59%1029.8 hPa

Link to 5 minute data for KFMH

Wind History from FMH (wind in knots)
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Last 24hrN16N16N16N16N16N16NE14
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NE4NE4CalmCalmCalmCalmN5N6N6N6NE8NE6NE6
1 day agoNE14
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2 days agoW5W8W10W12W12W10
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SW5W5W4CalmCalmCalmCalmCalmCalmNE5N5NE9

Tide / Current Tables for Chappaquoit Point, West Falmouth Harbor, Buzzards Bay, Massachusetts
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Chappaquoit Point
Click for Map
Sun -- 04:12 AM EDT     -0.68 feet Low Tide
Sun -- 06:28 AM EDT     Sunrise
Sun -- 10:11 AM EDT     Moonrise
Sun -- 10:49 AM EDT     5.36 feet High Tide
Sun -- 04:51 PM EDT     -0.47 feet Low Tide
Sun -- 06:42 PM EDT     Sunset
Sun -- 08:55 PM EDT     Moonset
Sun -- 11:14 PM EDT     4.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.82.40.9-0.2-0.7-0.50.31.42.74.15.15.34.83.520.6-0.2-0.5-0.10.71.72.944.6

Tide / Current Tables for Woods Hole, Massachusetts Current (use with caution)
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Woods Hole
Click for Map
Sun -- 01:03 AM EDT     -0.01 knots Slack
Sun -- 03:43 AM EDT     -4.28 knots Max Ebb
Sun -- 06:28 AM EDT     Sunrise
Sun -- 07:00 AM EDT     0.12 knots Slack
Sun -- 10:11 AM EDT     Moonrise
Sun -- 10:40 AM EDT     4.01 knots Max Flood
Sun -- 01:32 PM EDT     -0.07 knots Slack
Sun -- 04:08 PM EDT     -4.17 knots Max Ebb
Sun -- 06:42 PM EDT     Sunset
Sun -- 07:20 PM EDT     0.00 knots Slack
Sun -- 08:55 PM EDT     Moonset
Sun -- 11:03 PM EDT     3.94 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.10.8-3-4.1-4.3-3.7-2.60.12.53.43.943.62.3-2.1-3.6-4.2-3.9-3-1.42.13.13.73.9

Weather Map
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GEOS Local Image of    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
Ground Weather Radar Station Boston, MA
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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.