Friday, July3, 2020
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Marine Weather and Tides
Sagamore, 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 5:10AMSunset 8:20PM Friday July 3, 2020 10:41 PM EDT (02:41 UTC) Moonrise 7:09PMMoonset 3:37AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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- 1016 Pm Edt Fri Jul 3 2020
Overnight..NE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers with patchy drizzle. Vsby 1 nm or less.
Sat..NE winds 5 to 10 kt. Seas around 2 ft. Patchy drizzle.
Sat night..SE winds around 5 kt. Seas around 2 ft. Patchy fog. Vsby 1 to 3 nm.
Sun..S winds 5 to 10 kt. Seas around 2 ft.
Sun night..SW winds 5 to 10 kt. Seas around 2 ft.
Mon and Mon night..S winds 5 to 10 kt. Seas around 2 ft.
Tue through Wed night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 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 1016 Pm Edt Fri Jul 3 2020
Synopsis for massachusetts and rhode island coastal waters.. High pres builds across the waters tonight into Sunday. A cold front moves across the waters Sunday night into Monday. High pres returns Monday night into Tuesday. 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 Sagamore, MA
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location: 41.83, -70.55     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 032309 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 709 PM EDT Fri Jul 3 2020

SYNOPSIS. Showers and a few thunderstorms across western Massachusetts and northern Connecticut will come to an end by early to mid evening. Dry weather is on tap for Saturday, but low clouds and cool temperatures will persist on the coast while a partly sunny and warm afternoon is on tap for interior southern New England. A weak cold front moves through late Sunday/Sunday night which may trigger a few showers or a thunderstorm. Weak high pressure follows Monday, then a warm front approaches Tue with chance of showers/thunderstorms in the interior. Hot and humid conditions move in for the middle and end of next week with scattered afternoon/evening thunderstorms each day.

NEAR TERM /UNTIL 6 AM SATURDAY MORNING/. 710 PM update .

T-storms moving south from SE NY and SW CT along the eastern gradient of the instability axis. Stable environment across BOX CWA. Showers this evening will exit CT and may clip parts of the south coast, otherwise dry most of the night. Some patchy drizzle and fog is possible overnight near the coast with moist NE low level flow, and will have to watch for some showers developing late tonight over the Cape/Islands near elevated instability offshore. Low temps will mainly be in the lower to middle 60s.

SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/. Saturday .

High pressure over the Maritimes and low pressure to our south will maintain low level NE flow. A bit of drizzle is still possible into mid morning along the coast, but the main issue will be low clouds. We should see partial sunshine develop across the interior by afternoon, but it may take until mid to late afternoon for some partial sunshine to emerge across eastern MA/RI. In fact, the Cape/Islands may remain in the low clouds until early evening.

Onshore flow and an abundance of clouds will hold high temps into the 70 to 75 degree range across eastern MA as well as the Cape/Islands. Meanwhile, enough sunshine should push parts of western MA and northern CT into the lower to middle 80s.

Saturday night .

Dry and pleasant weather is expected for Saturday night. Low temps should drop between 60 and 65. Low probability of a shower or two toward daybreak with some elevated instability, but forcing rather limited so maintained a dry forecast. Some patchy fog is possible too.

LONG TERM /SUNDAY THROUGH FRIDAY/. Highlights .

* Few showers/t-storms possible Sunday * Seasonably warm Mon/Tue with shower/t-storm risk interior on Tue * Hot and humid Wed-Fri with sct afternoon/evening t-storms

Sunday .

Mid level shortwave drops across northern ME with 500 mb temps dropping to -12 to -13C. This cold pool combined with surface heating will contribute to CAPES 1000-1500 J/kg. Weak cold front moving across SNE may provide a focus for a few showers/t-storms developing. Guidance is not too bullish on convection so areal coverage may be limited but do expect a few storms which may be focused more in eastern half New Eng based on location of front. 850 mb temps around 16C which supports highs well into the 80s and near 90 degrees in CT valley, but cooler immediate coastline where sea breezes expected to develop.

Monday and Tuesday .

Cold front moves offshore by early Mon with weak high pres building in bringing mostly sunny skies. Low level winds turn easterly which will result in a cooler airmass Mon, especially in the east. Instability axis gets pushed west of SNE so a dry day expected. Highs Mon will range from the 70s eastern MA coast to the mid/upper 80s CT valley. Then on Tue, warm front will move in from the west with risk of sct showers/t-storms in western MA/CT as instability increases in the west. Seasonably warm temps Tue.

Wednesday through Friday .

SNE will be on the periphery of subtropical ridge which will result in increasing heat/humidity moving into the region. Many locations will likely see temps into the upper 80s and lower 90s. Series of weak shortwaves traveling within the nearby polar jet combined with unstable environment will lead to scattered afternoon/evening showers/t-storms each day.

AVIATION /00Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels .

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

00Z Update .

Tonight . High confidence. Cooling boundary layer tonight allows for conditions to deteriorate to IFR-LIFR levels across central/eastern MA & RI with lowest conditions along the coast. Ceilings lowering to MVFR in western MA/CT. Showers exiting CT this evening and may see some drizzle or a few showers develop overnight along the coast.

Saturday . High confidence. Gradual improvement in ceilings to mainly VFR by mid afternoon from west to east. However, lower clouds may hang tough all day across the far southeast New England coast.

Saturday night . High confidence in mainly VFR conditions.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF. Main concern will be heavy showers and embedded t-storms in the vicinity of the terminal through 21-22z.

Outlook /Sunday through Wednesday/ .

Sunday through Sunday Night: VFR. Slight chance SHRA, slight chance TSRA.

Monday: VFR.

Monday Night: VFR. Slight chance SHRA.

Tuesday: VFR. Slight chance SHRA, slight chance TSRA.

Tuesday Night: VFR. Slight chance SHRA.

Wednesday: VFR. Breezy. Slight chance SHRA, slight chance TSRA.

MARINE. Tonight through Saturday night . High confidence.

Marginal NE wind gusts of 20 to 25 knots and 3 to 5 foot persisted late this afternoon, so will maintain SCA headlines across the eastern waters early this evening. Weakening gradient will allow winds/seas to drop below small craft advisory thresholds this evening. NE winds of 10 to 15 knots Sat morning will shift to the south at 5 to 15 knots Sat night as offshore low moves further away from the region. Winds/seas will remain below SCA thresholds Sat and Sat night. Areas of fog tonight and perhaps again Sat night will reduce vsbys at times for mariners.

Outlook /Sunday through Wednesday/ .

Sunday through Sunday Night: Winds less than 25 kt. Slight chance of rain showers, slight chance of thunderstorms.

Monday through Tuesday Night: Winds less than 25 kt.

Wednesday: Winds less than 25 kt. Seas locally approaching 5 ft. Slight chance of rain showers, slight chance of thunderstorms.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Small Craft Advisory until 8 PM EDT this evening for ANZ250- 254.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 12 mi45 min 67°F2 ft
WAXM3 - Waquoit Bay Reserve, MA 17 mi117 min NW 2.9 65°F 1011 hPa65°F
BZBM3 - 8447930 - Woods Hole, MA 22 mi72 min 65°F 71°F1011.8 hPa
44020 - NANTUCKET SOUND 27 mi42 min N 18 G 21 65°F 71°F1010.6 hPa (+0.6)65°F
CHTM3 33 mi84 min N 8.9 G 11 66°F 1011 hPa
FRVM3 - 8447386 - Fall River, MA 34 mi72 min 66°F 73°F1012.8 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 34 mi72 min NNE 11 G 15 66°F 1012.6 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 34 mi52 min NNE 12 G 14 63°F 4 ft1012.1 hPa (+0.6)63°F
FRXM3 35 mi72 min 65°F 64°F
44013 - BOSTON 16 NM East of Boston, MA 36 mi52 min NNE 14 G 16 63°F 65°F3 ft1011.6 hPa (+0.5)63°F
BUZM3 - Buzzards Bay, MA 39 mi42 min NNE 18 G 20 1012.9 hPa (+1.1)
CPTR1 - 8452944 - Conimicut Light, RI 43 mi72 min 65°F 74°F1012.8 hPa
PRUR1 43 mi72 min 66°F 64°F
NAXR1 - Narragansett Bay Reserve, RI 44 mi117 min NE 11 67°F 1012 hPa64°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 44 mi72 min NE 9.9 G 13 66°F 1013.1 hPa
PVDR1 44 mi72 min NE 8 G 13 66°F 1013 hPa63°F
BHBM3 - 8443970 - Boston, MA 45 mi72 min 64°F 63°F1012.5 hPa
NTKM3 - 8449130 - Nantucket Island, MA 45 mi72 min N 8.9 G 9.9 67°F 73°F1011.2 hPa
FOXR1 - 8454000 - Providence, RI 45 mi72 min NE 8.9 G 12 67°F 69°F1012.9 hPa
NWPR1 - 8452660 - Newport, RI 47 mi72 min N 11 G 14 66°F 64°F1012.3 hPa
44029 - Buoy A0102 - Mass. Bay/Stellwagen 48 mi98 min NE 14 G 16 62°F 5 ft1010.5 hPa
QPTR1 - 8454049 - Quonset Point, RI 48 mi72 min NNE 16 G 19 67°F 69°F1012.6 hPa

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, MA12 mi57 minN 125.00 miFog/Mist64°F64°F100%1012.2 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA18 mi46 minN 92.00 miFog/Mist67°F64°F91%1011.5 hPa
Marshfield Airport, MA20 mi67 minNE 7 G 122.00 miFog/Mist64°F64°F100%1012.9 hPa
Provincetown Municipal Airport, MA22 mi46 minNNE 92.50 miFog/Mist64°F64°F100%1012.5 hPa
New Bedford, New Bedford Regional Airport, MA24 mi49 minNNE 7 G 1410.00 miOvercast65°F63°F93%1012.1 hPa

Link to 5 minute data for KPYM

Wind History from PYM (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmW4W4CalmCalmSW35543SW8S55W6SW8SW6
1 day agoNE4CalmE3CalmCalmS3CalmCalmSW3W3W3CalmSW4W73S5E5E9NE10CalmSW4CalmSW4SW3
2 days agoNE10E5NE4NE4N3N3CalmCalmN6N5NW7N4N4N6N8NE7NE7NE8E4E5E8NE9NE4NE5

Tide / Current Tables for Cape Cod Canal, Bournedale, Massachusetts
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Cape Cod Canal
Click for Map
Fri -- 03:37 AM EDT     Moonset
Fri -- 03:58 AM EDT     -0.47 feet Low Tide
Fri -- 05:12 AM EDT     Sunrise
Fri -- 10:03 AM EDT     6.41 feet High Tide
Fri -- 04:07 PM EDT     0.17 feet Low Tide
Fri -- 07:09 PM EDT     Moonrise
Fri -- 08:20 PM EDT     Sunset
Fri -- 10:16 PM EDT     7.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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53.31.50-0.501.22.84.65.96.46.15.23.82.20.80.20.61.83.45.26.87.57.3

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Fri -- 02:19 AM EDT     0.02 knots Slack
Fri -- 03:37 AM EDT     Moonset
Fri -- 05:12 AM EDT     Sunrise
Fri -- 05:30 AM EDT     4.46 knots Max Flood
Fri -- 08:49 AM EDT     -0.03 knots Slack
Fri -- 11:34 AM EDT     -4.47 knots Max Ebb
Fri -- 02:42 PM EDT     0.02 knots Slack
Fri -- 05:47 PM EDT     4.30 knots Max Flood
Fri -- 07:09 PM EDT     Moonrise
Fri -- 08:20 PM EDT     Sunset
Fri -- 08:59 PM EDT     -0.12 knots Slack
Fri -- 11:57 PM EDT     -4.80 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-4.4-3.6-1.82.63.94.44.442.9-1.4-3.5-4.4-4.4-3.8-2.61.73.44.14.343.1-0.4-3.4-4.5

Weather Map
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wmap_A
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
Wind Forecast for Boston, MA (22,6,7,8)
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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.