Saturday, May30, 2020
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Marine Weather and Tides
Rockport, 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 5:06AMSunset 8:14PM Saturday May 30, 2020 8:09 PM EDT (00:09 UTC) Moonrise 12:52PMMoonset 1:51AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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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ANZ251 Massachusetts Bay And Ipswich Bay- 716 Pm Edt Sat May 30 2020
Tonight..SW winds around 5 kt, becoming W 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Sun..NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
Sun night..NW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft.
Mon..NW winds 5 to 10 kt, becoming E in the afternoon. Seas 2 to 3 ft.
Mon night..W winds around 5 kt. Seas 2 to 3 ft.
Tue..SW winds around 5 kt, becoming S in the afternoon. Seas 2 to 3 ft.
Tue night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Wed and Wed night..S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Thu and Thu night..W winds 5 to 10 kt. Seas 2 to 3 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 Pm Edt Sat May 30 2020
Synopsis for massachusetts and rhode island coastal waters.. A cold front will push across the waters overnight. High pressure from the great lakes will bring cooler drier air Sunday into Tuesday. A cold front will approach the waters on Wednesday.. 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 Rockport, MA
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location: 42.65, -70.62     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 302356 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 756 PM EDT Sat May 30 2020

SYNOPSIS. A dry cold front passes by from west to east tonight. Drier and cooler weather is expected through Monday as a high pressure builds in behind this front. A warm front arrives from the west sometime late Tuesday into Wednesday, bringing our next significant opportunity for showers. Temperatures on an upward trend mid to late next week. Temperatures gradually warm by midweek, toward above-normal levels by next weekend.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/.

Made some minor tweaks to the forecast this evening. Introduced a chance for some showers across NW MA as showers arrive from eastern New York state. Expecting intensity of these showers to diminish some with sunset. Also tweaked clouds across the Cape and islands, where the marine stratus moved father offshore. With winds turning W to NW this evening and overnight, went with a more optimistic forecast. Still need to monitor early this evening for the possible redevelopment of fog and stratus until that wind shift kicks in.

Previous Discussion .

Highlights .

* Dry weather across much of southern New England tonight. Low chance of showers across NW MA.

* Gusty winds developing after midnight.

A trough will dig from southern Ontario/central Great Lakes into Quebec and northern New England late tonight. A surface low will lift through northern New England into New Brunswick/Nova Scotia. The cold front associated with that low will slide through the majority of southern New England by midnight.

With the front sliding through do have some precipitation chances across northwestern MA. Think this may even be overdone as the airmass ahead of the front is quite dry with dew points in the 40s and low 50s from west to east. Leaned toward the ECMWF/NAM and GEM guidance versus the GFS/HREF, which brings some rain showers further south toward the CT/MA border. Regardless, any precipitation expected would be light with QPF values less than 0.1 inches.

In wake of the cold front am expecting winds to pick up. Winds will become more northwesterly. Gusts of 15 to 20 mph are expected, though there may be some 25 mph gusts across the eastern slopes of the Berkshires.

Colder air will advect into the region with 0 to +8 degree Celsius 850 hPa moving in. It will be a bit cooler tonight in comparison to the past couple of nights with lows ranging from the mid 40s to the upper 50s from west to east.

SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/. Highlights .

* Dry and gusty Sunday with cooler temperatures.

* Strong radiational cooling expected Sunday night into early Monday as high pressure builds in.

Sunday .

Broad trough remains over the region on Sunday. Will have a shortwave eject into the eastern Great Lakes/northern New England later on Sunday. Should remain dry across the region on Sunday, but with the cooler air aloft, cyclonic flow and diurnal heating am anticipating diurnal CU development.

Nudged up high temperatures on Sunday a bit in comparison to the previous forecast. Think with the strong mixing in place, coupled with strong sunshine and some downsloping could have warmer readings. Nudged temperatures up to the 75th percentile of guidance at this point in time, but not out of the question that temperatures need to be increased further across the Merrimack and CT River Valley. Despite this increase will still be cooler in comparison to the past couple of days with readings ranging from the low 60s across the far west to the low 70s.

The pressure gradient tightens up across the region with high pressure nudging in from the central Great Lakes and low pressure lifting off to the northeast. This will bring gusty winds across the region. At the moment appears that the stronger gusts will be during the morning with speeds lessening during the afternoon as the pressure gradient relaxes a bit. Could see some gusts around 20-25 mph during the morning and around 15-20 mph by the afternoon.

Sunday night .

Cyclonic flow persists aloft, but a ridge axis will build into the central and eastern Great Lakes. A surface high will nudge into the region from the southwest, which will relax the pressure gradient and bring clear skies.

Expecting a strong radiational cooling night across southern New England with clear skies and light winds. Knocked down temperatures to the 25th percentile of guidance. Do have some concerns that winds may stay a bit too high for stronger radiational cooling, but if it appears it will be lighter then temperatures will need to be decreased further. Lows range from the upper 30s to the low 50s.

LONG TERM /MONDAY THROUGH SATURDAY/. Highlights .

* Cooler Monday. Scattered diurnal showers with low-topped thunderstorms possible late, mainly north/east of the CT Valley.

* Warm front brings risk for rain showers later Tuesday into Wednesday. Mainly dry Thursday.

* Rain showers and/or thunder possible into next weekend, but confidence is low on the timing.

* Slow warming trend through mid to late week, near to just above early-June normal temperatures.

Details .

Rather deep mid level trough moves farther offshore through early next week, leaving southern New England with a projected near zonal (W to E) flow along the USA/Canada border. This near zonal mid flow looks to linger into next weekend. These patterns typically lead to timing errors, as the smaller scale features are tougher to predict accurately. Another question will be how close to our region a closed mid level low lingers to southern New England. Lower than normal confidence timing the rainfall chances through most of next week.

Temperatures expected to be slightly below normal through Monday night, then trend to near normal by Wednesday, then above normal Thursday into next Saturday.

Rainfall-wise, there are a couple of windows. Low risk for a few showers Monday, with an even lower risk for a thunderstorm or two, due to limited moisture. The mid level cold pool centered to our north should be close enough to provide some shallow instability. Low freezing levels still exhibited in model soundings, so a non- zero risk for some small hail or graupel.

A warm front is expected to push toward our region sometime Tuesday night into Wednesday. This will mean a greater chance for some showers into the middle of next week. The risk for showers should end once the cold front associated with a low pressure over southeast Canada passes by sometime Thursday into Thursday night. Again, lower than normal confidence on timing.

AVIATION /00Z SUNDAY THROUGH THURSDAY/. Forecaster Confidence Levels .

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

Tonight . High confidence

VFR across all terminals. Gusty northwest winds developing between 07Z-12Z from west to east across interior terminals.

Sunday . High confidence

VFR with breezy northwest winds around 20-25 kts during the morning. Gusts decreasing to around 20 kts during the afternoon.

Sunday Night . High confidence

VFR with NW to WNW winds. Speeds below 10 kts.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Monday through Thursday/ .

Monday through Monday Night: VFR.

Tuesday: VFR. Slight chance SHRA.

Tuesday Night through Wednesday Night: VFR. Chance SHRA.

Thursday: VFR.

MARINE. Small Craft Advisories continue due to elevated seas across the southern outer waters extending to just east of Cape Cod. This advisory should be able to be taken down after midnight.

Anticipate another Small Craft Advisory may be needed across the eastern outer waters and potentially extending down to the waters south of Nantucket. Conditions are borderline, so have held off from hoisting another advisory with this update.

Outlook /Monday through Thursday/ .

Monday through Tuesday: Winds less than 25 kt. Seas locally approaching 5 ft.

Tuesday Night through Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers.

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

Thursday: Winds less than 25 kt. Areas of rough seas. Slight chance of rain showers.

FIRE WEATHER. In the wake of a cold front, expecting dry and gusty conditions across southern New England Sunday. Winds will be out of the northwest across the region with speeds of 10-15 mph. Will be gusty through the day, but expecting stronger gusts during the morning timeframe. Gusts of 20-25 mph can be expected. By the afternoon, gusts lessen to 15-20 mph. This will couple with minimum relative humidities of 25 to 30 percent across much of the interior. Coastal locations will see minimum relative humidities of 30 to 50 percent. A Special Weather Statement may be needed, but this is pending input from state forestry partners.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory until 5 AM EDT Sunday for ANZ255-256.

SYNOPSIS . Belk/BL NEAR TERM . Belk/BL SHORT TERM . BL LONG TERM . Belk AVIATION . Belk/BL MARINE . Belk/BL FIRE WEATHER . BL


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44029 - Buoy A0102 - Mass. Bay/Stellwagen 9 mi125 min WSW 7.8 G 7.8 61°F 43°F2 ft1006 hPa
44013 - BOSTON 16 NM East of Boston, MA 21 mi79 min SSW 1.9 G 3.9 69°F 60°F1 ft1007.6 hPa (-0.0)56°F
IOSN3 - Isle of Shoals, NH 22 mi69 min WNW 2.9 G 5.1 71°F 1008.2 hPa (+0.7)49°F
44073 26 mi125 min S 5.8 G 5.8 63°F 54°F
44098 - Jeffrey's Ledge, NH (160) 26 mi61 min 59°F3 ft
CMLN3 29 mi185 min WNW 8.9 81°F
BGXN3 - Great Bay Reserve, NH 30 mi84 min WNW 1.9 77°F 1009 hPa54°F
BHBM3 - 8443970 - Boston, MA 31 mi75 min 78°F 53°F1007.9 hPa
44030 - Buoy B0102 - Western Maine Shelf 38 mi125 min NE 1.9 G 3.9 3 ft1011.8 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 40 mi79 min S 7.8 G 7.8 62°F 2 ft1008.8 hPa (-0.3)60°F
WELM1 - 8419317 - Wells, ME 46 mi69 min NNW 9.9 G 14 74°F 47°F1008.8 hPa (+0.9)
WEXM1 - Wells Reserve, ME 48 mi69 min WNW 7 75°F 48°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Beverly, Beverly Municipal Airport, MA17 mi76 minW 510.00 miPartly Cloudy76°F51°F42%1007.8 hPa

Link to 5 minute data for KBVY

Wind History from BVY (wind in knots)
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Tide / Current Tables for Rockport, Massachusetts
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Rockport
Click for Map
Sat -- 01:50 AM EDT     Moonset
Sat -- 05:08 AM EDT     Sunrise
Sat -- 05:24 AM EDT     9.06 feet High Tide
Sat -- 11:47 AM EDT     0.14 feet Low Tide
Sat -- 12:52 PM EDT     Moonrise
Sat -- 06:11 PM EDT     8.70 feet High Tide
Sat -- 08:12 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.42.64.46.48.198.97.96.13.91.80.50.20.92.44.46.588.78.47.25.43.31.7

Tide / Current Tables for Marblehead Channel, Massachusetts Current
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Marblehead Channel
Click for Map
Sat -- 12:46 AM EDT     0.00 knots Slack
Sat -- 01:51 AM EDT     Moonset
Sat -- 02:53 AM EDT     0.41 knots Max Flood
Sat -- 05:09 AM EDT     Sunrise
Sat -- 06:30 AM EDT     -0.00 knots Slack
Sat -- 09:42 AM EDT     -0.36 knots Max Ebb
Sat -- 12:53 PM EDT     Moonrise
Sat -- 01:16 PM EDT     0.00 knots Slack
Sat -- 03:27 PM EDT     0.42 knots Max Flood
Sat -- 07:07 PM EDT     -0.00 knots Slack
Sat -- 08:12 PM EDT     Sunset
Sat -- 10:24 PM EDT     -0.33 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.10.30.40.40.30.1-0.1-0.3-0.3-0.4-0.3-0.3-0.10.20.40.40.40.30-0.2-0.3-0.3-0.3

Weather Map
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wmap_A
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.
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Wind Forecast for Boston, MA (20,4,5,8)
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Ground Weather Radar Station Boston, MA
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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.