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Marine Weather and Tides Brewster, 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 7:00AM

Sunset 4:43PM

Tuesday January 21, 2020 4:05 PM EST (21:05 UTC)

Moonrise 5:15AM

Moonset 2:48PM

Illumination 12%

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 Brewster, MA

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Area Discussion for - Boston, MA

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FXUS61 KBOX 211759 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 1259 PM EST Tue Jan 21 2020

SYNOPSIS.

High pressure will build over southern New England through much of the week, bringing dry weather and moderating temperatures. There is the potential for a coastal storm this weekend, but uncertainty exists in regards to timing and precipitation types.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

1245 AM Update .

Increased sky cover a bit across Cape Cod and the Islands for the rest of the afternoon based on satellite observations. No other changes since the previous forecast update.

10 AM Update .

Nudged down high temperatures for today a few degrees based on the latest obs as we are just a bit too warm. Otherwise forecast remains on track. Light ocean effect snow showers still possible across Cape Cod. Best opportunity for this is across the outer Cape.

Previous Discussion .

High pres in control. Column is rather dry and sunshine will give way to increasing high clouds later today from the north as mid level shortwave moves into northern New Eng. The one caveat for today is potential for ocean effect clouds and flurries/snow showers for the outer Cape. Steep low level lapse rates over the ocean and delta T from SST to top of the shallow boundary layer around 17-18C so enough low level instability for clouds and perhaps a few flurries or snow showers. N wind trajectory favors the outer Cape and some of the hi-res sources are indicating some light QPF so have indicated chc pops here. Low risk for a coating to one half inch for the outer Cape. Low level cold air remains in place with 925 mb temps around -10C so expect highs 25 to 30.

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

Tonight . Any ocean effect clouds or flurries over the outer Cape will dissipate as low level moisture decreases and inversion lowers. Otherwise, some mid/high clouds expected to move through the region, especially across northern and eastern MA as shortwave rotates SE through the Gulf of Maine. Potential cloud cover may have some impact on low temps so went a bit above MOS guidance with temps mostly in the teens, with some single numbers in western MA.

Wednesday . Mid level shortwave moves well east of New Eng with ridging building into the region. High pres will remain in control at the surface. Expect lots of sunshine with light winds and moderating temps. Highs will range through the 30s.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/.

Highlights .

* Milder, above normal temperatures Thu/Fri with continued dry weather

* Coastal storm this weekend brings rain/snow chances Sat/Sun, favoring more rain than snow along the I-95 corridor, but uncertainty in precip type remains.

Details .

Wednesday night through Friday .

Dry, quiet weather rounds out the very quiet work week. This under a building ridge of sprawling high pressure. A noticeable change from the first half of the week will be the rebounding temperatures. We'll be back toward normal and then some as low and mid level flow comes out of the S/SW on the back side of the high and draws in milder air. A subsidence inversion under the high pressure will keep mixing very shallow (model soundings indicate to around 950 mb); should see highs in the low to mid 40s each day. A weak gradient may allow for sea breezes keeping things cooler along the coast. Lows dip into the 20s/low 30s Thursday and Friday nights, colder on Wednesday night (teens) due to light winds, little cloud cover, and resultant radiational cooling, in addition to the colder airmass we start with.

Saturday and Sunday .

For Saturday we are becoming increasingly confident that our stretch of quiet weather will come to an end, though details regarding exact onset time and precip type are less certain. A digging 500 mb trough and sfc low over the Ohio Valley move into the mid-Atlantic, generating a coastal system that will move east in the vicinity of southern New England from Saturday through Sunday, perhaps even lingering into Monday. At this point the best chance for snow continues to be in the interior, especially the higher elevations given the marginal/warm antecedent airmass and the expected low track too far north to bring with it the cold air necessary for snow to the coast. Wintry precip, however, is certainly still a possibility anywhere. EC ensemble probabilities of >1" snow continue to exhibit a SE creep over the last several model runs, so plenty is still left to be seen in regards to any snow potential for the rest of southern New England. Blocking high pressure in eastern Canada will play a role, potentially assisting with colder air, and slowing the low as it ejects. This will be a very wet system (QPF totals up to over 1" possible), and slow moving, with potential to drop a significant amount of snow in interior southern New England that would be disruptive and impactful. Stay tuned.

Monday .

Still some question as to how quickly the weekend system exits but Monday should be dry or drying out as the low exits to the northeast and high pressure builds in from the west.

AVIATION /18Z TUESDAY THROUGH SUNDAY/.

Forecaster Confidence Levels .

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

18Z discussion .

Expect VFR conditions at all terminals as high pressure builds in from the Mid Mississippi River Valley. There is potential for MVFR ceilings at HYA and ACK as winds are conducive for ocean effect clouds and possibly showers to move in. Expect these clouds to dissipate between 00Z and 03Z as drier air moves in per the latest RAP/HRRR guidance.

Winds generally less than 10 knots at terminals out of the north/northwest. Winds become light overnight and gradually back to a westerly/southwesterly direction by Wednesday morning.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Wednesday Night through Saturday/ .

Wednesday Night through Friday: VFR.

Friday Night: Mainly VFR, with local MVFR possible.

Saturday: Mainly VFR, with areas IFR possible. Breezy. Chance RA, chance SN.

MARINE.

Short Term /through Wednesday/ . High confidence.

Diminishing wind/seas becoming light today with light winds/seas continuing through Wed as high pres in control. Scattered snow showers possible today and this evening over waters east of Cape Cod.

Outlook /Wednesday Night through Saturday/ .

Wednesday Night through Thursday: Winds less than 25 kt.

Thursday Night: Winds less than 25 kt. Areas of seas approaching 5 ft.

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

Friday Night: Winds less than 25 kt. Rough seas up to 9 ft.

Saturday: Winds less than 25 kt. Rough seas up to 9 ft. Chance of rain.

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

SYNOPSIS . KJC/BW NEAR TERM . BL SHORT TERM . KJC LONG TERM . BW AVIATION . BL MARINE . BL

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
44090	14 mi	36 min			40°F	2 ft
44020 - NANTUCKET SOUND	22 mi	86 min				1 ft
WAXM3 - Waquoit Bay Reserve, MA	27 mi	81 min	N 1.9	35°F			1028 hPa	18°F
44018 - SE Cape Cod 30NM East of Nantucket, MA	30 mi	76 min	NW 7.8 G 14	27°F		2 ft	1028.4 hPa (-0.0)	18°F
NTKM3 - 8449130 - Nantucket Island, MA	34 mi	48 min	N 6 G 12	30°F	35°F		1028.1 hPa
BZBM3 - 8447930 - Woods Hole, MA	36 mi	54 min		31°F	38°F		1028.3 hPa

Wind History for Nantucket Island, MA

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Last 24hr

N10 G15

N7 G13

NW8 G12

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N8 G11

NW10 G14

NW8 G13

NW11

N11 G15

NW9 G15

N8 G15

NW8 G15

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NW6 G10

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N10 G16

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N8 G12

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N9 G12

1 day ago

NW6 G13

NW8 G14

NW7 G11

W8 G11

NW9 G17

NW13 G18

NW14 G25

NW14 G24

NW12 G20

N12 G19

N13 G23

N13 G24

NW13 G20

NW13 G21

NW13 G22

NW13 G19

NW11 G19

NW15 G21

NW14 G24

N13 G18

NW12 G17

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N14 G21

N11 G16

2 days ago

SW5

SW4 G7

SE3 G7

SE4 G7

SE6 G13

SE9 G15

S11 G19

SE8 G15

S7 G18

SW11 G20

SW9 G18

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W6 G13

W7 G12

W6 G15

W6 G12

NW6 G13

W9 G12

W7 G13

W10 G14

W7 G13

W6 G11

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Chatham, Chatham Municipal Airport, MA	7 mi	14 min	NNW 7	10.00 mi	Fair	28°F	21°F	75%	1028.5 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA	12 mi	70 min	N 8	10.00 mi	A Few Clouds	29°F	18°F	63%	1027.8 hPa
Provincetown Municipal Airport, MA	18 mi	10 min	NW 8	10.00 mi	Partly Cloudy	27°F	21°F	78%	1028.8 hPa

Link to 5 minute data for KCQX

Wind History from CQX (wind in knots)

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1 day ago

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NW8 G17

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N12 G19

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6 G17

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6 G16

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2 days ago

SW7

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S11 G18

S15 G21

S12 G23

S7 G16

S9 G20

SW9 G22

SW10 G19

SW10 G19

SW9

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5 G14

W12 G21

NW10 G18

6 G15

NW8

W6 G14

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Tide / Current Tables for Sesuit Harbor, East Dennis, Cape Cod Bay, Massachusetts

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Tide / Current Tables for Pollock Rip Channel, Massachusetts Current

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Weather Map

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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

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Wind Forecast for Boston, MA (16,3,4,5)

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Ground Weather Radar Station Boston, MA

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