Sunday, December8, 2019
Privacy Policy
L-36.com


Marine Weather and Tides
Sandwich, MA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:53AMSunset 4:12PM Sunday December 8, 2019 3:33 AM EST (08:33 UTC) Moonrise 3:22PMMoonset 3:59AM Illumination 87% Phase: Waxing Gibbous; Moon at 11 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
    EDIT      (on/off)   Help
ANZ231 Cape Cod Bay- 116 Am Est Sun Dec 8 2019
.gale watch in effect from Monday afternoon through late Monday night...
Rest of tonight..NW winds 10 to 15 kt. Seas around 2 ft.
Sun..W winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft.
Sun night..S winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft.
Mon..S winds 10 to 15 kt with gusts up to 20 kt, increasing to 15 to 20 kt with gusts up to 35 kt in the afternoon. Seas 2 to 4 ft. Areas of fog. Showers likely. Vsby 1 nm or less.
Mon night..SW winds 20 to 25 kt. Gusts up to 40 kt, decreasing to 30 kt after midnight. Seas 3 to 5 ft. Areas of fog. Rain. Vsby 1 nm or less.
Tue..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Showers likely.
Tue night..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Showers likely.
Wed..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of rain or snow showers. Vsby 1 to 3 nm.
Wed night through Thu night..N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 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 116 Am Est Sun Dec 8 2019
Synopsis for massachusetts and rhode island coastal waters.. High pressure will move off the coast Sunday as a slow moving cold front approaches from the west Mon into Tue. Gale force S to sw winds are expected late Mon afternoon into Tue. The cold front sweeps across the waters Tue night with a secondary cold front moving through Wed afternoon. Strong high pres moves into the region Thu and Fri. 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 Sandwich, MA
   Hourly   EDIT   Help
location: 41.78, -70.49     debug


Area Discussion for - Boston, MA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KBOX 080756 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 256 AM EST Sun Dec 8 2019

SYNOPSIS. Cold high pressure moving across southern New England was resulting in a frigid night. The high moves offshore Sunday, starting a return flow of milder and moist air for the first half of the week. This will bring off and on rain from late Sunday night into Monday and Tuesday. Very strong wind gusts are possible late Monday and Monday night in southeast areas. A cold front moves through Tuesday night, and there might be some snow Tuesday night into Wednesday although confidence is very low at this point. Dry weather returns late Wednesday with colder temperatures for Thursday. Another coastal weather system may bring a mix of precipitation Friday or Saturday.

NEAR TERM /UNTIL 6 AM THIS MORNING/. 115 AM Update:

Forecast on track for the overnight hours. Clear skies and frigid temperatures. Already down to 1 degree above zero at Orange, MA and 5 degrees at Chicopee, MA. It was 3 below zero up in Jaffrey, NH!

SHORT TERM /6 AM THIS MORNING THROUGH 6 PM MONDAY/. 320 PM update .

Sunday .

Deep layer ridge moves across the area during the morning. Thus dry weather prevails along with abundant sunshine. However it will be a very cold start to the day. Not much of a temp recovery as 1030+ mb high over southeast MA limits boundary layer mixing given subsidence inversion. So temps only 3-5 degs higher tomorrow with highs in the mid to upper 30s, low 30s high terrain. Winds become SSW during the afternoon, fairly light but will increase late in the day especially from Cape Ann to Cape Cod in eastern MA.

Sunday night .

Enough deep layer ridging nearby to support dry weather thru the evening. However increasing return SW flow aloft will result in the risk for showers late Sunday night and especially toward Monday morning on nose of approaching low level jet. Given this low level WAA pattern temps will actually rise overnight thru the 30s and into the low 40s along the south coast toward Monday morning.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/.

Big Picture .

Broad upper trough digs over the Plains and Great Lakes Monday night and Tuesday while an upper ridge sits over the Western Atlantic. This creates a southwest flow aloft across the Eastern USA and brings milder air into Southern New England. The upper trough moves east midweek, crossing New England Thursday. Less agreement on the pattern for Friday-Saturday, but possibly a trough digs over the Plains, then sweeps east to New England over next weekend.

Above normal 500-mb heights Tuesday fall below normal Thursday- Friday before increasing again on Saturday. So the deep layer is expected to be mild Tuesday, then falling below normal late week with signs of a recovery by Saturday.

Mass fields and thermal fields in the models are similar through midweek but then show some model-to-model differences late in the week. This means moderate confidence through Tuesday, then diminishing to low confidence by Friday and Saturday.

Daily Concerns .

Monday night-Tuesday .

Two features of note Monday night. One is a strong southerly low- level jet moving up the coast over Southern New England. This provides an inflow of moisture with PW values between 1 and 1.25 inches as well as low level forcing and lift. The second is a strong 150-kt upper jet moving east from the Plains and eventually curving up over Southern New England. The left exit region of this jet moves over us Monday evening and night, also generating lift. Temperatures will be above freezing through the lowest 10 thousand feet, so high confidence the precip type will be rain/showers.

Low level south to southwest winds reach 60 kt within a couple of thousand feet of the surface, with highest values just offshore. Lapse rates will be near moist adiabatic in a shower-filled warm sector. Expect strong wind gusts to be brought to the surface, with gusts of 35 to 45 kt. Values similar to this are forecast at 1000 mb. Thus expect strong gusty winds Monday night and Tuesday.

Guidance also suggests the precipitation comes in two segments: one Monday night followed by a break Tuesday morning and then a second segment of rain/showers late Tuesday and Tuesday night. Total rainfall during this time will be roughly 1 to 2 inches.

Temperatures in the warm sector are indicated by 12C temps at 950 mb. If we have a lapse rate close to isothermal at night, expect nightime min temps in the lows to mid 50s. A similar temperature aloft with a dry adiabatic lapse to the surface would suggest max temps around 60 during the day Tuesday. Will show upper 50s and around 60 in the coastal plain, and mid 50s in Western/Central MA

Tuesday night .

Cold front sweeps through Southern New England Tuesday evening and early night. After it moves through, indications are that it turns parallel to the upper flow just as we move under the right entrance region of the upper jet. This should keep the front nearby overnight and maintain support for precipitation much of the night. With colder air moving in aloft, this may mean a changeover to snow with potential of a couple of inches. Cross sections show the deep column of moisture dries out by 12Z Wednesday, suggesting a diminishing chance of snow by sunrise.

Wednesday-Thursday .

Upper trough and associated cold pool move across New England on Wednesday. This should push any lingering precipitation offshore. Cold pool instability may generate some clouds and scattered rain/snow showers during Wednesday, with best potential in Western and Central MA and areas north of the MA border.

High pressure then builds in with cold and dry weather Thursday.

Friday-Saturday .

GFS shows another coastal system moving up from the south Friday, spreading precipitation into Southern New England with continues into Saturday. The ECMWF is slower with the coastal system, moving precipitation ashore on Saturday. GFS temperatures are borderline, with potential for both rain and snow. The ECMWF temperature show predominently rain. Expect a mix of precipitation on one or both of the days, but with low confidence.

AVIATION /08Z SUNDAY THROUGH THURSDAY/. Forecaster Confidence Levels .

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

Short Term /through Monday/ . High confidence.

0615Z Update:

Overnight . VFR clear.

Sunday . VFR. Light SW winds slowly increasing to 10-15 kt later in the day.

Sunday night . VFR to start becoming lowering to MVFR in scattered showers after midnight. LLWS possible late.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Monday Night through Thursday/ .

Monday Night: MVFR/IFR conditions possible. Strong winds with local gusts up to 40 kt. RA.

Tuesday: Mainly MVFR, with local VFR possible. Windy with gusts up to 35 kt. SHRA likely.

Tuesday Night: MVFR/IFR conditions possible. Breezy. Chance SHRA, chance SHSN.

Wednesday: Mainly VFR, with areas IFR possible in the morning. Breezy. Chance SHSN, chance SHRA.

Wednesday Night through Thursday: VFR. Breezy.

MARINE. Short Term /through Monday/ . High confidence.

115 AM Update:

Have issued Small Craft Advisories for 5 ft seas that are expected on the outer waters tonight. Have issued a Gale Watch for all coastal waters from Monday afternoon through Monday night. More on that to follow in the next discussion at 4 AM.

Overnight . NW winds 10-15 kts.

Sunday . 1030+ mb high pressure overhead during the morning drifts offshore in the afternoon shifting winds from light/variable to SSW over southern New England in the afternoon. Dry weather and good vsby continue.

Sunday night . high pressure offshore with SSW winds increasing to near 25 kt especially eastern MA waters. Dry weather and good vsby in the evening but showers likely develop late and especially toward Monday morning lowering vsby.

Outlook /Monday Night through Thursday/ .

Monday Night: Moderate risk for gale force winds with gusts up to 40 kt. Rough seas up to 14 ft. Rain. Local visibility 1 to 3 nm.

Tuesday: Moderate risk for gale force winds with gusts up to 35 kt. Rough seas up to 14 ft. Chance of rain showers.

Tuesday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 11 ft. Rain showers likely.

Wednesday: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas. Chance of rain showers, chance of snow showers. Local visibility 1 to 3 nm.

Wednesday Night: Moderate risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of rough seas. Slight chance of snow showers. Local visibility 1 to 3 nm.

Thursday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . Gale Watch from Monday afternoon through late Monday night for ANZ231>235-237-250-251-254>256. Gale Watch from Monday afternoon through late Monday night for ANZ230-236. Small Craft Advisory from 9 PM this evening to 1 PM EST Monday for ANZ250. Small Craft Advisory from 11 PM this evening to 1 PM EST Monday for ANZ254>256.

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


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44090 9 mi33 min 46°F3 ft
WAXM3 - Waquoit Bay Reserve, MA 14 mi108 min WNW 1.9 28°F 1032 hPa
BZBM3 - 8447930 - Woods Hole, MA 20 mi51 min 28°F 42°F1032.9 hPa
44020 - NANTUCKET SOUND 23 mi53 min 44°F2 ft
44018 - SE Cape Cod 30NM East of Nantucket, MA 35 mi43 min NW 12 G 16 29°F 4 ft1032 hPa (+1.4)15°F
FRVM3 - 8447386 - Fall River, MA 36 mi51 min 23°F 43°F1033.3 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 37 mi45 min Calm G 1.9 24°F 1033.3 hPa
FRXM3 37 mi51 min 24°F 14°F
BUZM3 - Buzzards Bay, MA 39 mi33 min N 9.9 G 12 28°F 1033.4 hPa (+1.0)
NTKM3 - 8449130 - Nantucket Island, MA 40 mi45 min NNW 8 G 13 30°F 40°F1032.5 hPa
44013 - BOSTON 16 NM East of Boston, MA 40 mi43 min NW 14 G 18 28°F 47°F2 ft1032 hPa (+1.2)17°F
PRUR1 45 mi45 min 24°F 15°F
NAXR1 - Narragansett Bay Reserve, RI 46 mi108 min NNW 2.9 23°F 1033 hPa14°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi45 min NNW 1.9 G 4.1 24°F 1033.7 hPa
PVDR1 47 mi51 min NW 4.1 G 5.1 22°F 1033.5 hPa13°F
FOXR1 - 8454000 - Providence, RI 48 mi51 min N 4.1 G 6 23°F 44°F1033.4 hPa
NWPR1 - 8452660 - Newport, RI 48 mi51 min N 5.1 G 7 27°F 39°F1033.1 hPa

Wind History for Borden Flats Light at Fall River, MA
(wind in knots)    EDIT      (on/off)   Help
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
Last
24hr
NW5
NW8
G11
NW6
NW6
NW4
NW10
G13
NW10
G13
NW8
G11
NW10
G13
NW12
G15
NW10
G14
W13
G17
NW9
NW8
G11
NW6
G9
NW6
NW4
N3
NW3
NW4
NW6
NW6
NW6
NW2
1 day
ago
W13
G19
W12
W12
SW12
SW13
SW14
SW13
SW11
SW12
G16
SW13
G17
SW13
G16
S3
SW15
SW19
G27
SW18
G22
SW17
W18
W17
NW12
G17
NW13
G17
NW12
G18
NW12
G16
NW9
G12
NW9
G12
2 days
ago
SW6
SW7
W10
W8
W10
G13
W14
G17
W17
G21
W19
G23
W19
G23
W22
W19
G26
W20
G25
W16
NW21
G27
W18
G23
W17
G23
W20
G30
W21
G28
W13
G17
W13
G17
W15
W12
G15
W16

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA9 mi48 minNW 610.00 miFair19°F12°F73%1032.5 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA13 mi97 minWNW 610.00 miFair27°F15°F61%1031.9 hPa
Plymouth, Plymouth Municipal Airport, MA16 mi41 minN 010.00 miFair16°F12°F88%1032.9 hPa
Provincetown Municipal Airport, MA22 mi37 minNNW 1010.00 miA Few Clouds29°F18°F63%1032.3 hPa
Marshfield Airport, MA24 mi38 minW 410.00 miFair19°F14°F79%1032.8 hPa

Link to 5 minute data for KFMH

Wind History from FMH (wind in knots)
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
Last 24hrN5N5N5NW4NW6N6
G15
N8
G15
NW8NW6
G13
NW8N4NW9N5NW6NW5NW3NW6N6--NW8----NW6NW6
1 day agoW11
G17
W11
G17
W13NW12NW12W10W10W11W12W10W10W10W7SW12SW17
G25
SW17
G23
SW17
G23
SW17
G23
SW17
G23
SW17
G23
NW16
G23
N10
G17
N10
G17
N10
G17
2 days agoCalmCalmW7W8NW6NW9NW7
G16
NW10NW10NW15NW12
G19
NW12
G20
NW10NW10NW12NW10
G17
NW10
G17
W16
G24
NW15
G27
NW15
G28
NW15
G25
NW15
G25
NW13
G20
NW11
G16

Tide / Current Tables for Cape Cod Canal (East Entrance), Massachusetts (2)
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Cape Cod Canal (East Entrance)
Click for Map
Sun -- 01:53 AM EST     1.14 feet Low Tide
Sun -- 02:59 AM EST     Moonset
Sun -- 06:56 AM EST     Sunrise
Sun -- 08:13 AM EST     8.69 feet High Tide
Sun -- 02:21 PM EST     Moonrise
Sun -- 02:27 PM EST     0.87 feet Low Tide
Sun -- 04:11 PM EST     Sunset
Sun -- 08:39 PM EST     8.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.11.61.11.72.94.56.37.98.78.47.45.842.1111.93.256.87.98.17.36

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
   EDIT      (on/off)   Help   One Week of Data
Cape Cod Canal
Click for Map
Sun -- 12:09 AM EST     0.02 knots Slack
Sun -- 02:59 AM EST     Moonset
Sun -- 03:21 AM EST     3.80 knots Max Flood
Sun -- 06:41 AM EST     -0.19 knots Slack
Sun -- 06:56 AM EST     Sunrise
Sun -- 09:27 AM EST     -4.06 knots Max Ebb
Sun -- 12:40 PM EST     0.02 knots Slack
Sun -- 02:22 PM EST     Moonrise
Sun -- 03:47 PM EST     3.77 knots Max Flood
Sun -- 04:11 PM EST     Sunset
Sun -- 07:03 PM EST     -0.19 knots Slack
Sun -- 09:48 PM EST     -4.07 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-1.12.53.43.83.73.32.3-1.7-3.3-4-4-3.4-2.31.633.63.83.52.80.7-2.9-3.8-4.1-3.7

Weather Map
       (on/off)   Help Weather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This webiste uses cookies to save your settings. No personal information is saved. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerious 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.