Wednesday, January22, 2020
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Marine Weather and Tides
Popponesset, 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 7:00AMSunset 4:44PM Wednesday January 22, 2020 3:48 AM EST (08:48 UTC) Moonrise 6:17AMMoonset 3:40PM Illumination 8% Phase: Waning Crescent; Moon at 27 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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ANZ232 Nantucket Sound- 116 Am Est Wed Jan 22 2020
Rest of tonight..NW winds 5 to 10 kt. Seas 1 foot or less.
Wed..NW winds around 5 kt, becoming sw in the afternoon. Seas 1 foot or less.
Wed night..SW winds around 5 kt. Seas 1 foot or less.
Thu..SW winds around 5 kt. Seas 1 foot or less.
Thu night..SW winds around 5 kt, becoming nw after midnight. Seas 2 to 3 ft.
Fri and Fri night..NE winds 5 to 10 kt. Seas 2 to 4 ft.
Sat..E winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of rain.
Sat night and Sun..E winds 15 to 20 kt, becoming se 10 to 15 kt. Gusts up to 35 kt. Seas 4 to 6 ft. Patchy fog. Rain.
Sun night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft. A chance of rain. 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 Wed Jan 22 2020
Synopsis for massachusetts and rhode island coastal waters.. High pres controls the waters through the end of the work week. Low pressure will likely approach the waters from the southwest this weekend. 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 Popponesset, MA
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location: 41.44, -70.38     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 220835 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 335 AM EST Wed Jan 22 2020

SYNOPSIS. High pressure will be in control through the end of the week bringing dry weather and moderating temperatures. A storm is expected to impact the region Saturday into Sunday with rain near the coast and snow over the high elevation interior. Some light snow is possible Sunday night into early Monday as the storm exits, then mainly dry and seasonable conditions into Tuesday.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Mid level ridging builds into New Eng from the Gt Lakes today while high pres in control at the surface. Some high clouds may spill over the ridge this morning, otherwise mostly sunny skies as the column is quite dry. Moderating low and mid level temps will result in a nice temp recovery after a cold start to the day. Highs will reach the mid/upper 30s across much of the region with light winds.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/. High pres remains in control through Thursday with clear skies and light winds. Another cold night tonight with good radiational cooling. Leaned toward coldest guidance which yields lows mostly in the teens with single numbers in the CT valley. Then continued airmass moderation on Thu will allow highs to reach low/mid 40s.

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/. Highlights .

* Above normal temperatures Friday with continued dry weather

* Coastal storm this weekend brings rain/snow Sat into early Monday. Best chance of snow in the interior. Light snow regionwide by late Sun/early Mon as the system exits.

* Gusty winds over the waters late Saturday and Sunday

* Drying out Monday - Tuesday

Details .

Thursday night through Friday night .

Dry and quiet weather continues through the end of the work week under a ridge of high pressure. Not expecting full sun as we begin to see our first signs of the approaching storm system with upper level moisture/cirrus deck moving in Thursday night and Friday (good sunrise Friday perhaps?). Dry with breaks of sun and well above average temperatures expected as SW flow on the back side of the high draws in milder air. Highs on Friday will be in the mid 40s (compared to normals in the mid 30s). Decent radiational cooling is possible Thursday night with decoupled winds but the advancing high clouds may keep things warmer than they could otherwise achieve; leaning toward MOS guidance with lows in the 20s.

Saturday and Sunday .

Confidence is high that the weekend will be unsettled, with a strong coastal storm breaking our streak of quiet weather. At the synoptic scale we see a digging 500 mb trough and surface low over the Ohio Valley move into the mid-Atlantic, spawning a secondary low along the frontal boundary which approaches Long Island Saturday afternoon. The low then crosses southern New England. An important variable for rain/snow delineation will be where the low center crosses. Unfortunately for us low elevation snow lovers, the trend has not been our friend, with a steady shift north in the low track over the last several model runs. Things aren't set in stone yet of course, but they don't look favorable for significant snows outside of the high elevation interior. For instance, nearly all of the EPS ensemble members place the low track somewhere over southern New England (as opposed to further south offshore which would be more favorable for pulling in cold air). The 700 mb low looks to pass directly overhead, which typically is too far north as well. This together with the warm antecedent airmass, and things just look too warm for snow outside of the higher elevations of the Berkshires and Worcester Hills, even with the high to our northeast. We'll have to see if that can provide any/enough cold air drainage to make a difference, but it doesn't look super favorable at the moment. One thing that high will do, though, is keep this system around longer than the quick hitter we saw last weekend. Precipitation begins Saturday morning in western MA/CT and (though becoming less widespread/heavy on Sunday) doesn't come to an end until sometime early Monday. As stated before, this will likely be more of a soaking rain event for most, changing to novelty snow showers late Sunday/early Monday as the system moves off and colder air is wrapped around. This would likely end up as a dusting to an inch at most. However, where we do see snow for the duration, there is enough QPF (up to >1") that snowfall totals could be significant and impactful. Stay tuned. The pressure gradient tightens as the low passes Sat night/Sun which will lead to gusty winds, mainly along the immediate coast and over the waters. Gale headlines may be needed.

Monday and Tuesday .

Drying out Monday and Tuesday though some light snow showers may linger, especially over eastern MA early on Monday. High pressure moves in to replace the low and high temperatures return to just above seasonal values, in the upper 30s, with a warming trend toward mid week.

AVIATION /09Z WEDNESDAY THROUGH SUNDAY/. Forecaster Confidence Levels .

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

Short Term /through Thursday/ . High confidence.

VFR. Light winds.

KBOS Terminal . High confidence in TAF.

KBDL Terminal . High confidence in TAF.

Outlook /Thursday Night through Sunday/ .

Thursday Night through Friday: VFR.

Friday Night: Mainly VFR, with local IFR possible. Breezy.

Saturday: Mainly VFR, with areas IFR possible. Windy with local gusts up to 30 kt. RA likely, chance SN.

Saturday Night: Mainly VFR, with areas IFR possible. Windy with local gusts up to 30 kt. RA, SN.

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

MARINE. Short Term /Through Thursday/ . High confidence.

Light winds and seas through the period as high pres over the waters.

Outlook /Thursday Night through Sunday/ .

Thursday Night: Winds less than 25 kt. Seas locally approaching 5 ft.

Friday: Winds less than 25 kt. Seas up to 5 ft.

Friday Night: Winds less than 25 kt. Areas of rough seas.

Saturday: Low risk for Small Craft Advisory winds with local gusts up to 30 kt. Rough seas up to 10 ft. Chance of rain.

Saturday Night: Moderate risk for Small Craft Advisory winds with gusts up to 30 kt. Rough seas up to 14 ft. Rain.

Sunday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Rough seas up to 14 ft. Chance of rain.

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

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44020 - NANTUCKET SOUND 6 mi48 min 7.8 G 12 1029.4 hPa
WAXM3 - Waquoit Bay Reserve, MA 12 mi63 min WNW 1.9 20°F 1029 hPa13°F
BZBM3 - 8447930 - Woods Hole, MA 16 mi54 min 25°F 38°F1029.3 hPa
NTKM3 - 8449130 - Nantucket Island, MA 18 mi48 min NNW 2.9 G 5.1 26°F 35°F1029.2 hPa (-0.7)
44090 28 mi48 min 40°F1 ft
BUZM3 - Buzzards Bay, MA 35 mi48 min NNW 7 G 8.9 26°F 1029.9 hPa (-0.7)
FRVM3 - 8447386 - Fall River, MA 45 mi54 min 19°F 39°F1030.1 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi48 min WNW 1.9 G 2.9 20°F 1030 hPa (-0.4)
FRXM3 46 mi54 min 20°F 9°F

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marthas Vineyard Airport, MA13 mi55 minN 010.00 miFair9°F1°F73%1029.2 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA17 mi1.9 hrsN 010.00 miFair16°F5°F62%1029.2 hPa
Otis Air National Guard Base, MA17 mi52 minN 010.00 miFair10°F3°F72%1029.1 hPa
Nantucket, Nantucket Memorial Airport, MA21 mi55 minNW 310.00 miFair19°F10°F68%1029 hPa

Link to 5 minute data for KMVY

Wind History from MVY (wind in knots)
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Last 24hrN8N9N11N10N12N13N14N11N9NW10NW8N5NW5NW5N5NW7N4CalmCalmNW3NW3CalmNW4Calm
1 day agoN15
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Tide / Current Tables for Cape Poge, Chappaquiddick Island, Massachusetts
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Cape Poge
Click for Map
Wed -- 02:50 AM EST     0.19 feet Low Tide
Wed -- 05:17 AM EST     Moonrise
Wed -- 07:02 AM EST     Sunrise
Wed -- 09:45 AM EST     2.53 feet High Tide
Wed -- 02:40 PM EST     Moonset
Wed -- 03:38 PM EST     -0.02 feet Low Tide
Wed -- 04:44 PM EST     Sunset
Wed -- 10:25 PM EST     2.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.40.80.30.20.40.71.11.62.12.42.52.31.81.10.40-00.20.50.91.41.92.22.1

Tide / Current Tables for Woods Hole, Massachusetts Current (use with caution)
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Woods Hole
Click for Map
Wed -- 02:30 AM EST     0.17 knots Slack
Wed -- 05:18 AM EST     Moonrise
Wed -- 05:51 AM EST     3.57 knots Max Flood
Wed -- 07:03 AM EST     Sunrise
Wed -- 08:21 AM EST     -0.14 knots Slack
Wed -- 10:51 AM EST     -3.57 knots Max Ebb
Wed -- 02:41 PM EST     Moonset
Wed -- 02:59 PM EST     0.19 knots Slack
Wed -- 04:45 PM EST     Sunset
Wed -- 06:23 PM EST     3.82 knots Max Flood
Wed -- 09:03 PM EST     -0.14 knots Slack
Wed -- 11:22 PM EST     -3.31 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.8-2.2-1.41.52.73.43.63.11.8-2.3-3.3-3.6-3.3-2.8-20.32.43.33.83.730.7-2.6-3.3

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