Tuesday, May11, 2021
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Marine Weather and Tides
Green Harbor-Cedar Crest, MA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:24AMSunset 7:54PM Tuesday May 11, 2021 5:34 AM EDT (09:34 UTC) Moonrise 5:30AMMoonset 7:54PM 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
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ANZ231 Cape Cod Bay- 427 Am Edt Tue May 11 2021
Today..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Tonight..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Wed..NW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Wed night..W winds 5 to 10 kt, becoming nw after midnight. Seas 1 foot or less.
Thu and Thu night..W winds 5 to 10 kt. Seas 1 foot or less.
Fri through Sat night..SW winds 5 to 10 kt. Seas 1 foot or less. 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 427 Am Edt Tue May 11 2021
Synopsis for massachusetts and rhode island coastal waters.. Weak low pressure lingers over the maritimes through mid-week, generating clouds and isolated showers over land today and possibly Wednesday. Gusty west-northwest winds will also form each day. High pressure will slowly build towards the waters from the west through the end of the week. For additional information on possible hazardous weather for the week ahead, please visit www.weather.gov/boston/ehwo


7 Day Forecast for Marine Location Near Green Harbor-Cedar Crest, MA
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location: 42.08, -70.65     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 110723 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 323 AM EDT Tue May 11 2021

SYNOPSIS. Weak low pressure over Maine will circulate a steady stream of cooler than normal air across the region through Wednesday. Mainly dry through midweek with temperatures at or slightly above seasonal levels. Partly cloudy with spotty pop up showers this weekend but not looking at a washout. More unsettled into early next week with better chances for rains with a warm front nearby, though the details are still unclear.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Upper low centered over the Great Lakes sweeps east to New England and brings a -30C cold core over Nrn New England. The resulting cold advection over Srn New England will destabilize the airmass. Moisture cross sections show some moisture above 800 mb but dry air below. Consequently expect some cloud development in the afternoon, but most showers drying before reaching the ground. Will indicate 15-20 pct pops, slight chance pops, for the inland areas this afternoon. So mainly a dry day, but with some clouds and isolated/widely scattered showers of limited extent.

Mixing reaches to at least 800 mb and possibly 750 mb. Winds in this layer are forecast at 20-24 kt, and may support similar gusts at the surface. Temperatures mix to 60-65 at the surface.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/. Overview . Upper trough moves off to the east, but cold pool lingers through Wednesday maintaining some instability. Supporting upper jet passes just south of Srn New England.

Tonight .

Instability lessens with sunset, allowing clearing skies and lower, but not zero, wind. A range of temperatures, with the colder solutions showing mid 30s in Wrn Mass/CT while the milder solutions show low to mid 40s. Because some wind will remain overnight, the forecast remains milder than the coldest solutions. General range . upper 30s to mid 40s.

Wednesday .

With the cold pool lingering, and moisture between 850-mb and 700- mb, expect another day of diurnal clouds although maybe a tad less than today. Spot shower possible, especially in Western MA/CT, but rather isolated. Temperatures aloft are similar to today, so again forecast 60 to 65. Mixing will bring gusts near 20 kt.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/. Highlights .

* Dry weather thru midweek, with diurnal clouds fizzling with sundown. Seasonal/slightly above-avg temps thru Thurs nite.

* Spotty showers Fri into the weekend; any resulting precip is light and not a washout. Temps seasonal.

* Warm front may bring a better chance for rain early next week but still uncertain on details.

Details:

Wednesday Night into Thursday Night:

Sfc ridge from a large area of high pressure over the Great Lakes region will build into SNE through this period. Aloft, cyclonic flow/initial troughing at 500 mb undergoes neutral to weak 500 mb height rises. Cooler air aloft combined with rather shallow moisture and below-avg precipitable water values for mid-May (at/around 0.50") should foster fair weather type Cu as convective temps are reached, then dissipating to mostly clear skies shortly after sundown. Just isn't enough moisture to allow for precip, and well- mixed sub-cloud layers reflected in fcst soundings support idea of evaporation/virga production if any echoes materialize. Offered dry weather thru this period with lows Wed and Thurs nights in the 40s, and highs well into the 60s to low 70s, mid 60s along the coast. These temps generally follow NBM closely and are seasonal or slightly above-avg; may need to account for possible sea breeze influence along the immediate coasts but at the moment, flow looks too westerly for much if any inland advance.

Friday Thru the Weekend:

Shortwave ridge aloft into or just to our west of SNE flattens into a broadly cyclonic NW flow pattern aloft. A series of fairly weak shortwave disturbances move through the NW flow in this period. Following broad global model consensus, we'll be removed or at worst only receive only scant upper-level support from each (any?) of these disturbances. Stability profiles and model soundings look in general only nuanced/different than those of midweek. The increasing albeit weak upper-level support should allow for a larger coverage of diurnally-driven Cu with isolated to widely scattered showers. Kept PoPs at a 20-40% range to reflect isolated/sct showers, tending slightly higher into the weekend. However continued well mixed profiles will mitigate any significant rain from any of these showers, if any can be squeezed out at all.

Temps Friday thru the weekend look fairly seasonable, though the uptick in diurnal Cu could lead to slightly cooler high temps compared to midweek. Early Next Week:

Considerably more uncertainty in this period with most of the global models offering different solutions on the advance of a warm front from the Ohio Valley. Most of the 00z guidance keeps the first part of Mon dry, with greater solution spread noted in timing and advance of the warm front Mon nite thru Tues. GFS is the wetter and more progressive of the models, bringing its warm front in late Mon nite into early Tues with a cold front on its heels; Canadian GEM and the ECMWF keep the warm front far enough south to keep dry wx going thru Tues for most if not all of SNE. Ended up tempering NBM PoPs down toward Slight to low Chance until there's some better consistency in the models. Stayed fairly close to NBM on temps as well, which continue around seasonal normals for mid-May.

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

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

VFR through Wednesday. Low risk of an isolated shower this afternoon. Otherwise dry weather prevails. West-northwest winds become gusty this afternoon, reaching 20-24 kt, before diminishing tonight. Gusts to 20 kt possible Wednesday.

KBOS TAF . High confidence in TAF.

KBDL TAF . High confidence in TAF.

Outlook /Wednesday Night through Saturday/ .

Wednesday Night through Thursday Night: VFR.

Friday through Friday Night: VFR. Isolated SHRA.

Saturday: VFR. Scattered SHRA.

MARINE. Today . West-northwest winds increasing 15-20 kt. Low risk of 25 kt gusts near shore. Good vsbys. Seas near 5 feet on the outer waters. Small Craft Advisory issued for some of the outer waters.

Tonight . West winds 10-20 kt with low risk of 25 kt across Eastern MA waters. Seas 5-6 feet on the Southern outer waters. Small Craft Advisory continues on the outer waters.

Wednesday . Northwest winds 10 to 15 kt with some gusts near 20 kt. Seas near 5 feet on the outer waters.

Outlook /Wednesday Night through Saturday/ .

Wednesday Night through Friday: Winds less than 25 kt.

Friday Night through Saturday: Winds less than 25 kt. Isolated rain showers.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory until 5 AM EDT Wednesday for ANZ254>256.

SYNOPSIS . WTB/Loconto NEAR TERM . WTB SHORT TERM . WTB LONG TERM . Loconto AVIATION . WTB/Loconto MARINE . WTB/Loconto


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44013 - BOSTON 16 NM East of Boston, MA 18 mi35 min W 9.7 G 12 51°F 48°F1012.8 hPa44°F
44090 24 mi39 min 50°F1 ft
BHBM3 - 8443970 - Boston, MA 28 mi47 min 53°F 1012.6 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 31 mi91 min W 7.8 G 9.7 52°F 2 ft1011.2 hPa
WAXM3 - Waquoit Bay Reserve, MA 35 mi110 min W 1.9 48°F 1013 hPa48°F
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 38 mi47 min W 7 G 8.9 52°F 1014.1 hPa
BZBM3 - 8447930 - Woods Hole, MA 38 mi47 min 52°F 52°F1013.2 hPa
FRVM3 - 8447386 - Fall River, MA 38 mi47 min 52°F 53°F1014.3 hPa
FRXM3 39 mi47 min 52°F 45°F
FOXR1 - 8454000 - Providence, RI 44 mi47 min NNW 5.1 G 11 53°F 50°F1014.1 hPa
PVDR1 44 mi47 min NW 8 G 11 52°F 1014.2 hPa36°F
44020 - NANTUCKET SOUND 45 mi35 min 12 G 14 52°F
CPTR1 - 8452944 - Conimicut Light, RI 45 mi47 min 52°F 54°F1013.7 hPa
CHTM3 46 mi47 min W 2.9 G 6 51°F 53°F1012.2 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi110 min WNW 5.1 51°F 1014 hPa44°F
PRUR1 48 mi47 min 51°F 43°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi47 min NW 2.9 G 7 51°F 1014.7 hPa

Wind History for Borden Flats Light at Fall River, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marshfield Airport, MA2 mi60 minVar 310.00 miFair50°F48°F94%1012.9 hPa
Plymouth, Plymouth Municipal Airport, MA12 mi43 minWNW 510.00 miFair49°F43°F80%1012.9 hPa
Provincetown Municipal Airport, MA24 mi39 minW 910.00 miFair49°F46°F90%1012.6 hPa
Taunton, Taunton Municipal Airport, MA24 mi43 minWNW 310.00 miFair48°F43°F83%1013.4 hPa

Link to 5 minute data for KGHG

Wind History from GHG (wind in knots)
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Last 24hrNE33N7
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Tide / Current Tables for Gurnet Point, Massachusetts
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Gurnet Point
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Tue -- 05:25 AM EDT     Sunrise
Tue -- 05:29 AM EDT     Moonrise
Tue -- 06:04 AM EDT     0.26 feet Low Tide
Tue -- 12:13 PM EDT     8.98 feet High Tide
Tue -- 03:01 PM EDT     New Moon
Tue -- 06:12 PM EDT     1.00 feet Low Tide
Tue -- 07:52 PM EDT     Sunset
Tue -- 07:53 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.78.97.45.3310.30.72.146.38.198.77.65.93.9211.42.74.66.88.7

Tide / Current Tables for Boston Harbor, Massachusetts Current
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Boston Harbor
Click for Map
Tue -- 03:43 AM EDT     -1.34 knots Max Ebb
Tue -- 05:26 AM EDT     Sunrise
Tue -- 05:30 AM EDT     Moonrise
Tue -- 05:56 AM EDT     0.00 knots Slack
Tue -- 09:13 AM EDT     1.09 knots Max Flood
Tue -- 11:57 AM EDT     -0.00 knots Slack
Tue -- 03:01 PM EDT     New Moon
Tue -- 04:02 PM EDT     -1.17 knots Max Ebb
Tue -- 06:07 PM EDT     0.00 knots Slack
Tue -- 07:54 PM EDT     Sunset
Tue -- 07:56 PM EDT     Moonset
Tue -- 09:27 PM EDT     1.13 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.6-1-1.2-1.3-0.80.10.60.91.110.5-0-0.4-0.8-1-1.2-0.9-0.10.60.91.11.10.6

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