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Marine Weather and Tides Barnstable Town, 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.

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Sunrise 5:47AM

Sunset 7:43PM

Friday August 14, 2020 7:15 AM EDT (11:15 UTC)

Moonrise 1:01AM

Moonset 4:29PM

Illumination 20%

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.

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7 Day Forecast for Marine Location Near Barnstable Town, MA

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Area Discussion for - Boston, MA

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FXUS61 KBOX 140816 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 416 AM EDT Fri Aug 14 2020

SYNOPSIS.

It will still be warm this afternoon, but high pressure building across the Canadian Maritimes will result in cool temperatures this weekend especially across eastern Massachusetts. Low pressure may bring a period of showers sometime Sunday into Monday, but if it passes too far south mainly dry weather will persist. Temperatures should recover to seasonable levels by Tuesday and persist at those levels into Thursday with mainly dry weather.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

* Seasonable and mostly dry conditions today with scattered showers in Western MA and CT in the afternoon.

Today looks to be a tad cooler than Thursday with 850mb temperatures falling to +14C. With an inverted 500mb trough extending into New England and an increasing baroclinic gradient, expect northeast flow to increase across our area. Temperatures wise, expect highs over Eastern MA and RI to top out in the upper 70s to low 80s while interior MA and CT top out in the mid 80s thanks to downsloping effect. Moreover, the differential terrain heating will result in better chances of widely scattered to isolated showers towards the Berkshires East Slopes and the CT River valley. There may even be a rumble of thunder but confidence is not high enough to mention thunderstorms. Otherwise, expect a mostly dry and seasonable day with a welcome break from the recent oppressive heat and humidity. Enjoy!

Forecast wise, used HREF ARW to yield widespread dew points in the 50s especially in the afternoon hours since Bufkit indicates deep mixing up to 850mb. Also blended in MOS guidance since temperatures tend to overperform on days with deep mixing. Even though it can get a little toasty with highs in the mid to even upper 80s towards the CT River valley, dew points in the low to mid 50s along with a northerly breeze will make it quite comfortable for outdoor activities by mid August standards in Southern New England.

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

Tonight:

Dry and pleasant evening with lows across the interior falling into the upper 50s to low 60s. Closer to the coast, lows fall into the mid 60s with a low level jet developing over Eastern MA overnight. NE winds increase to 15-25 mph toward daybreak Saturday. This increasing low level jet will likely bring stratocumulus clouds onshore into eastern MA toward morning.

Saturday:

* Unseasonably cool and blustery for Eastern MA and RI. * High Surf Advisories are issued for most beaches on Saturday.

An unseasonably cool, cloudy, breezy (blustery in the afternoon, especially near the Eastern MA coast) but mostly dry day is in store. Surface high in the Canadian Maritimes combined with a disturbance passing well to our southeast will help reinforce the cool northeast flow for much of our area. The big temperature difference between the near-surface air (+15C at 925mb) and the ocean waters (mid to upper 70s for the southern waters) will help promote good mixing, helping to bring down some of the 30-35 kt winds between 850 and 925 mb. In fact, both the GEFS and NAEFS show the 850mb and 925mb jet at 3 to 4 standard deviations above normal!

It will certainly feel fall-like and even raw at times especially after such an anomalously hot stretch of weather. In general, expect highs to be 5-10 degrees below climatological normal with highs only in the low to mid 70s for Eastern MA and RI. Though the SSTs in our immediate ocean waters are in the mid to upper 70s, SSTs in Gulf of Maine are in the upper 50s to low 60s. With such a strong NE flow, the air will originate from over waters that are considerably cooler, lending more confidence in highs only reaching the low 70s off the Eastern MA coast. On the other hand, Western MA and CT are expected to be warmer in the upper 70s to perhaps low 80s thanks to more sunshine. Rain chances wise, expect mostly dry conditions but with a cool northeast flow regime, can't rule out widely scattered to isolated drizzle/light showers across Eastern MA and RI.

In addition, High Surf Advisories have been issued for all beaches except Boston Harbor due to 7-10 ft waves developing from the strong NE flow.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/.

Highlights .

* Below normal temps continue Sun especially along the coast

* Offshore low may bring a period of showers sometime Sun into Mon, but it may pass too far south resulting in just a few spot showers

* High Surf/Dangerous rip currents will persist Sun and possibly Mon

* Seasonable summer warmth returns by Tue and continues through Thu

Details .

Saturday night .

Departing offshore wave of low pressure will still generate some gusty northeast winds Saturday night along the coast. A few showers will be possible mainly along the southeast New England coast, but a washout is not expected. Temperatures will mainly be in the 60s Sat night, but will feel a bit cool along the coast with the gusty NE winds.

Sunday and Monday .

Low pressure will emerge off the mid Atlantic coast and pass southeast of the Benchmark Sunday into Monday. There is uncertainty on its specific track and how far northwest the main shield of rain gets. The guidance remains split with the ECMWF/UKMET keeping the track far enough south, where we would end up mainly dry with just a few spot showers. The GFS/CMC have trended a bit further south over the last 24 hours, but still indicate a period of showers may impact areas for a time especially near the south coast. Still need to keep options open, but odds for widespread significant rainfall appear low at this time.

Relatively cool temperatures will persist on Sunday with highs mainly in the 70s and probably a lot of clouds. Coolest temps will be along the eastern MA coast. We may see temps rebound a bit by Monday especially in the CT River Valley where the best chance exists for temps to exceed 80.

High Surf .

High surf along with dangerous rip currents will likely persist Sunday and perhaps into Monday, especially along east facing ocean exposed beaches with anomalously high seas just off shore for the middle of August.

Tuesday through Thursday .

High pressure will have shifted east of the Canadian Maritimes by Tuesday. This will bring an end to the onshore flow, other than localized diurnal sea breezes. Temperatures should return to seasonable levels with highs mainly in the 80s away from the immediate coast/sea breeze potential. Do not see any big precipitation threats, so while a few showers can not be ruled out dry weather should dominate.

AVIATION /08Z FRIDAY THROUGH TUESDAY/. Forecaster Confidence Levels .

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

0730Z TAF Update:

Rest of tonight: High confidence.

VFR conditions except for local IFR to MVFR where patchy fog has developed. Light and variable winds.

Today: High confidence

VFR conditions with slight chance of showers in Western MA and CT. NE winds at 5 to 10 kt.

Tonight: High confidence.

VFR to start but MVFR/IFR possible late especially across eastern MA with increasing NE winds bringing low clouds onshore. NE winds 5-10 kt, gusting 15-20 kt towards daybreak across the Eastern MA/RI terminals.

Saturday: Moderate confidence.

VFR to start but Eastern MA/RI terminals should see deterioration to IFR to MVFR ceilings by late morning. Interior MA/CT terminals should remain mostly VFR. Slight chance for showers but main concern is strong NE winds 15-20 kt, with up to 25 kt winds and 35 kt gusts possible on the Cape and Island terminals.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Saturday Night through Tuesday/ .

Saturday Night: MVFR/IFR conditions possible. Windy with local gusts up to 30 kt. Slight chance SHRA.

Sunday through Sunday Night: Mainly MVFR, with local IFR possible. Breezy. Chance SHRA.

Monday: Mainly MVFR, with areas VFR possible. Breezy. Chance SHRA.

Monday Night: Mainly VFR, with areas MVFR possible. Breezy. Chance SHRA.

Tuesday: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA.

MARINE.

Today . NE winds 5-10 kt increasing to 10-15 kt by the afternoon. Dry weather and good vsby.

Tonight . Low pressure develop well south of New England, with NE winds increasing to 10-15 kt with 20-25 kt gusts by Saturday daybreak.

Saturday . Gale-force winds with 30-35 kt gusts possible for waters off the Outer Cape, the islands and MA/RI south coast. As a result, Gale Watches have been issued for the aforementioned waters and Small Craft Advisories for the remainder of the waters.

Outlook /Saturday Night through Tuesday/ .

Saturday Night: Moderate risk for Small Craft Advisory winds with local gusts up to 30 kt. Rough seas up to 10 ft. Slight chance of rain showers.

Sunday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas. Chance of rain showers.

Sunday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Chance of rain showers.

Monday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas. Chance of rain showers.

Monday Night: Winds less than 25 kt. Areas of rough seas. Chance of rain showers.

Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . High Surf Advisory from 8 AM to 8 PM EDT Saturday for MAZ007- 019-022>024. RI . High Surf Advisory from 8 AM to 8 PM EDT Saturday for RIZ008. MARINE . Gale Watch from Saturday morning through Saturday evening for ANZ232-254>256. Small Craft Advisory from 4 AM Saturday to 8 AM EDT Sunday for ANZ231-233>235-237-250-251. Small Craft Advisory from 7 AM to 10 PM EDT Saturday for ANZ230-236.

SYNOPSIS . Chai/Frank NEAR TERM . Chai SHORT TERM . Chai LONG TERM . Frank AVIATION . Chai/Frank MARINE . Chai/Frank

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
44020 - NANTUCKET SOUND	10 mi	26 min	N 12 G 16		77°F	1 ft
WAXM3 - Waquoit Bay Reserve, MA	12 mi	91 min	WNW 1	102°F			1017 hPa
44090	15 mi	19 min			66°F
BZBM3 - 8447930 - Woods Hole, MA	20 mi	46 min		73°F			1017 hPa
NTKM3 - 8449130 - Nantucket Island, MA	26 mi	46 min	NE 2.9 G 5.1	74°F			1017.2 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA	41 mi	26 min	NNW 3.9 G 5.8	69°F		1 ft	1017.3 hPa (-0.0)	65°F
BUZM3 - Buzzards Bay, MA	42 mi	76 min	NNE 7 G 8				1017.7 hPa (-0.3)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA	46 mi	46 min	N 1.9 G 2.9	72°F			1017.5 hPa
FRVM3 - 8447386 - Fall River, MA	46 mi	46 min		71°F			1017.6 hPa
FRXM3	46 mi	46 min		70°F				68°F

Wind History for Nantucket Island, MA

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Last 24hr

SW3

W2

W4

NW5 G9

NW5 G9

NW2 G9

NW4 G8

NW6 G10

N5 G9

N6 G9

N4

N2

N2

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NE5

E1 G6

1 day ago

SW7 G11

SW8 G12

SW5 G12

SW8 G12

SW5 G11

SW6 G11

SW7 G12

SW9

SW8 G16

SW9 G13

SW9 G13

SW8 G12

S7 G10

SW5 G8

SW6 G9

SW4 G8

SW5 G10

SW4 G8

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SW4 G8

W4 G8

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W3

2 days ago

SW6 G12

SW8 G11

SW6 G12

SW9 G17

SW10 G14

SW6 G12

SW8 G14

SW9 G15

SW9 G13

SW8 G13

SW8 G15

SW8 G16

SW8 G13

SW3 G11

SW5 G8

S5 G8

SW5 G11

SW5 G8

SW7

S5 G9

S4 G7

S4 G10

SW4 G10

S6

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Hyannis, Barnstable Municipal-Boardman Airport, MA	4 mi	20 min	N 4	10.00 mi	Fair	72°F	66°F	82%	1016.9 hPa
Otis Air National Guard Base, MA	11 mi	21 min	NNE 6	10.00 mi	Fair	70°F	64°F	83%	1017.3 hPa
Chatham, Chatham Municipal Airport, MA	18 mi	24 min	NNE 4	10.00 mi	Fair	72°F	60°F	66%	1017.4 hPa
Marthas Vineyard Airport, MA	22 mi	23 min	NNE 3	10.00 mi	Fair	70°F	64°F	84%	1016.9 hPa

Link to 5 minute data for KHYA

Wind History from HYA (wind in knots)

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Last 24hr

NW6

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N3

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Calm

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Calm

Calm

Calm

NE3

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Calm

NE3

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1 day ago

SW9

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SW13 G20

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S13 G17

SW12 G18

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S13 G19

SW13

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Calm

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2 days ago

SW10

SW13

SW11 G18

SW14

SW15 G19

S12 G20

SW15

SW15 G21

SW16 G22

S16 G24

SW16

SW11 G20

SW11

SW14 G20

SW13 G21

SW14 G21

SW18 G23

SW13 G22

SW13

SW11

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SW10

SW12

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Tide / Current Tables for Hyannis Port, Nantucket Sound, Massachusetts

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Tide / Current Tables for Cape Cod Canal, Massachusetts Current

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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

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Wind Forecast for Boston, MA (7,2,3,4)

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Ground Weather Radar Station Boston, MA

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