Sunday, August25, 2019 L-36.com


Marine Weather and Tides
Popponesset, MA

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Sunrise 5:58AMSunset 7:28PM Sunday August 25, 2019 12:31 PM EDT (16:31 UTC) Moonrise 12:31AMMoonset 3:46PM Illumination 24% Phase: Waning Crescent; Moon at 25 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- 1020 Am Edt Sun Aug 25 2019
.small craft advisory in effect through Monday morning...
This afternoon..NE winds 15 to 20 kt, increasing to 20 to 25 kt. Gusts up to 30 kt. Seas 2 to 4 ft. A slight chance of showers.
Tonight..NE winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.
Mon..NE winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Mon night..NE winds 10 to 15 kt with gusts up to 20 kt, becoming E 5 to 10 kt after midnight. Seas 2 to 3 ft.
Tue and Tue night..E winds 5 to 10 kt. Seas 2 to 3 ft.
Wed..E winds 5 to 10 kt. Seas around 2 ft.
Wed night..E winds 5 to 10 kt. Seas around 2 ft. Patchy fog. A chance of showers. Vsby 1 to 3 nm.
Thu..N winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Thu night..NW winds around 5 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 1020 Am Edt Sun Aug 25 2019
Synopsis for massachusetts and rhode island coastal waters.. High pressure moving over the maritimes will bring northeast winds to the southern new england coast this afternoon. The winds may be joined by a few light showers, especially across the waters south of boston. Northeast winds will be gradually shifting to the east by midweek. A tropical depression may form off the coast of florida early next week. This system may track close enough to affect the coastal waters with elevated seas by mid week. A cold front will approach the waters from the west on Thursday. 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 251356
afdbox
area forecast discussion
national weather service boston norton ma
956 am edt Sun aug 25 2019

Synopsis
Low clouds and light showers today. Dry and seasonable conditions
beginning Monday and through midweek. Possible showers Wednesday
night into Thursday, yet with an eye on the track and proximity
to a tropical system offshore late week which could produce high
surf and dangerous rip currents along the immediate shoreline.

Near term until 6 pm this evening
10 am update...

more like autumn than summer. Was optimistic that perhaps morning
boundary layer mixing would push the boundary layer higher and
entrain more dry air from h85 where its evident in thetae fields
that dry air advection is prevailing (see N new england which
saw the dry push yesterday and overnight). But alas, the cooler
maritime push has won out beneath a building dry inversion (see
12z gray, me sounding). So looking at areas of overcast conditions
especially for southeast new england and sadly right outside our
office. Scattered showers this morning, light in nature, mainly
drizzly, not a washout, aided by a well mixed boundary layer and
some localized low-level convergence of E NE winds (which are
mixing down lending to gusts up to 30 mph along the E SE shoreline
of ma).

But luckily the remainder of S new england is mixing out nicely and
morning overcast conditions are becoming more broken to scattered.

These areas warming up into the 70s while with the brisk onshore E ne
flow areas of E SE new england will be cooler with highs around the
upper 60s, mid 60s along the immediate E SE shoreline.

The expectation is of two things: 1.) h85 dry air advection will
continue to proceed that with boundary layer mixing should allow
the erosion of lower level moisture, and 2.) that the dry-inversion
will lower closer to the surface thereby limiting the low-level
destabilization of the boundary layer. As noted yesterday, we saw
cooling within the boundary layer below h8-7. The steep lapse rate
profiles to the surface with any boundary layer heating would
easily generate low clouds and showers till dry air (noted above)
would scour out.

Hoping for more sunshine along with favorable, dry conditions. A
measure of optimism towards late-day for most areas except in and
around the CAPE cod canal based on a consensus of near-term high-
res guidance (including href and nbm).

Short term 6 pm this evening through 6 pm Monday
Tonight...

clouds diminish a little, but remain in place over southern ri
and southeast ma. Cross sections show moisture lingering below
900 mb until Monday morning. Clearing skies farther inland due
to the subsidence from the maritime high.

Dew points remain low dry, ranging from the mid 40s in NW mass
to the 50s across much of southern new england. With light wind
from the high pressure, expect temperatures to the 40s over
western ma and the 50s to around 60 over the remainder of the
region.

E-ne wind gusts 25 to 30 mph along the south coast, while winds
are light across northern and western mass.

Monday...

high pressure expands a little and brings drying clearing to the
south coast. Expect a dry weather day. Temperatures aloft at the
top of the mixed layer will be 8-10c, so daytime temperatures
should be in the 70s.

Long term Monday night through Saturday
Highlights...

* temperatures will remain cool into Tuesday, then will moderate
to near and above normal by late this week
* onshore winds will bring spotty light rain or showers at times
into mid week, best chances on Wednesday
* scattered showers will move across late Wednesday through
Thursday
details...

Monday night and Tuesday...

high pressure will remain across the region, with the center
anchored across eastern canada into northern maine. This will
keep a cool e-ne wind flow in place. 00z models indicating that
the high center may actually slip S across the region by
Tuesday, so the e-ne winds, which may gust up to 15-20 mph early
Monday night will diminish. This will allow good subsidence and
dry conditions during this timeframe. May still see onshore
winds along the immediate coast on Tuesday.

Temperatures will moderate to near normal levels on Tuesday with
the lighter winds. Expect highs mainly in the 70s, but may hang
near 70 along the immediate E coast.

Wednesday through Friday...

big question at this point will be the passing of the potential
tropical system around the mid to late week period. 00z models
starting to show more spread as the low shifts NE from off the
carolina coast, which lends to lower confidence. In the
meantime, a cold front tries to shift E out of the eastern great
lakes to western ny pa.

The western edge of the high will ever so slowly shift E wed,
but the circulation around the offshore system will keep winds
from the E or se. May also see some showers develop off the
ocean across E mass into ri during the day.

At this point, showers develop across western areas as the
front approaches Wed night through Thu as the front passes.

This could be slower, however, depending upon the timing and
track of the passing offshore system.

The early morning forecast still suggest that the tropical
system will pass well southeast of nantucket. The most likely
impact from this system may be a period of rough surf along
ocean-exposed beaches.

There may be another front that might approach late this week,
but timing is very much in question.

Aviation 14z 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.

Today...

low-endVFR away from E SE ma and all of ri, as well as high
terrain. Around sct-bkn 040. Within MVFR, will hold around bkn-
ovc 020. Sct -shra -dz for SE ma into ri. Hope is that 18-21z
MVFR erodes and or lifts to low-endVFR while confining around
the CAPE cod canal into evening. As to winds, E NE 10 to 15 kts
sustained, upwards 20 kts sustained along the E SE ma coast with
gusts up around 25 kts.

Tonight...

sct-bkn MVFR lingers overnight across SE ma and ri whereas else-
where few-sct low-endVFR CIGS prevail. In regions ofVFR, could
see some patchy ifr fg develop, especially within the mid-ct
river valley of ma. E NE winds around 10 kts, strongest along
the E SE coast with sustained 10 to 15 kts, gusts up around 20
kts.

Monday...

MVFR over ri and SE ma dissipating during the morning. Few-sct
low-endVFR prevailing, most likely skc. E NE winds continue
around 10 to 15 kts with strongest winds along the SE coast with
gusts up to 20 kts.

Kbos terminal...

optimistic that -shra -dz will remain mostly S of the terminal.

However bkn-ovc MVFR lingers till 16-18z then lifting and mixing
out, becoming sct-bkn. E NE winds remaining breezy all day around
10 to 15 kts, gusts up to 20 kts.

Kbdl terminal...

through 16z there could be some brief MVFR conditions 020-030,
but thinking by 16-18z low-end sct-bkn 040 CIGS prevail with a
brisk NE wind around 10 to 15 kts. CIGS clearing out overnight.

Outlook Monday night through Thursday ... Moderate confidence.

Monday night through Tuesday night:VFR.

Wednesday: mainlyVFR, with local MVFR possible. Slight chance
shra.

Wednesday night: MVFR ifr conditions possible. Chance shra,
patchy br.

Thursday: mainlyVFR, with local ifr possible. Chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Monday ... High confidence.

Long-fetch E NE winds will produce gusts 20 to 30 kt and seas
building to around 5-6 feet. High pressure centered over the
maritimes will maintain the ene wind through Monday, maintaining
the rough seas on the outer waters through that time.

Wind gusts of 20 to 25 kt are likely on the southern waters with
25 to 30 kt possible on the southern outer waters. Wind gusts
diminish Monday as the maritime high pressure expands south.

Small craft advisory continues. We extended the advisory period
through the day Monday. No other significant changes were made.

Outlook Monday night through Thursday ... Moderate confidence.

Monday night: winds less than 25 kt. Seas up to 5 ft.

Tuesday: winds less than 25 kt. Areas of seas approaching 5 ft.

Tuesday night: winds less than 25 kt. Areas of seas approaching
5 ft. Local visibility 1 to 3 nm.

Wednesday: winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.

Wednesday night: winds less than 25 kt. Areas of seas
approaching 5 ft. Chance of rain showers, patchy fog. Areas of
visibility 1 to 3 nm.

Thursday: winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory until 11 am edt Monday for anz232>234.

Small craft advisory until 6 pm edt this evening for anz231-
236.

Small craft advisory until 5 am edt Monday for anz235-237.

Small craft advisory until 8 pm edt Monday for anz250-254>256.

Synopsis... Wtb sipprell evt
near term... Wtb sipprell evt
short term... Wtb
long term... Evt
aviation... Wtb sipprell evt
marine... Wtb evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44020 - NANTUCKET SOUND 6 mi32 min ENE 25 G 29 67°F 74°F59°F
WAXM3 - Waquoit Bay Reserve, MA 12 mi107 min N 2.9 70°F 1025 hPa60°F
BZBM3 - 8447930 - Woods Hole, MA 16 mi50 min 67°F 72°F1025.5 hPa
NTKM3 - 8449130 - Nantucket Island, MA 18 mi50 min NE 16 G 22 68°F 73°F1025.4 hPa
44090 28 mi32 min 66°F3 ft
BUZM3 - Buzzards Bay, MA 35 mi32 min NE 25 G 28 67°F 1025.3 hPa (+0.5)
FRVM3 - 8447386 - Fall River, MA 45 mi50 min 67°F 76°F1026.3 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 46 mi44 min NNE 16 G 20 68°F 1026 hPa
FRXM3 46 mi50 min 67°F 62°F

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Marthas Vineyard Airport, MA13 mi39 minNE 17 G 2610.00 miMostly Cloudy69°F57°F68%1025.1 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA17 mi36 minNE 1610.00 miOvercast70°F57°F64%1025.4 hPa
Otis Air National Guard Base, MA17 mi36 minENE 17 G 2410.00 miOvercast68°F59°F73%1026.1 hPa
Nantucket, Nantucket Memorial Airport, MA21 mi39 minNE 20 G 2710.00 miMostly Cloudy and Breezy70°F61°F73%1024.9 hPa

Link to 5 minute data for KMVY

Wind History from MVY (wind in knots)
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Last 24hrN8
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1 day agoNW7NW8NW5NW5NW5NW5W3CalmNW3CalmCalm--------N7N7N7N7N5N10N10N13N10
2 days agoSW12SW12SW14SW15
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SW12SW10SW9SW7--SW4------W10
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--NW3--NW3N3N3N5--N9N6

Tide / Current Tables for Cape Poge, Chappaquiddick Island, Massachusetts
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Cape Poge
Click for Map
Sun -- 12:31 AM EDT     Moonrise
Sun -- 01:03 AM EDT     0.19 feet Low Tide
Sun -- 06:00 AM EDT     Sunrise
Sun -- 07:53 AM EDT     1.96 feet High Tide
Sun -- 01:19 PM EDT     0.28 feet Low Tide
Sun -- 03:45 PM EDT     Moonset
Sun -- 07:26 PM EDT     Sunset
Sun -- 08:06 PM EDT     2.25 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.30.71.11.41.71.921.81.510.60.30.40.71.21.61.92.12.32.21.81.3

Tide / Current Tables for Woods Hole, Massachusetts Current (use with caution)
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Woods Hole
Click for Map
Sun -- 12:32 AM EDT     Moonrise
Sun -- 04:04 AM EDT     2.90 knots Max Flood
Sun -- 06:01 AM EDT     Sunrise
Sun -- 06:41 AM EDT     -0.06 knots Slack
Sun -- 09:06 AM EDT     -3.21 knots Max Ebb
Sun -- 12:02 PM EDT     0.16 knots Slack
Sun -- 03:46 PM EDT     Moonset
Sun -- 04:30 PM EDT     2.81 knots Max Flood
Sun -- 07:00 PM EDT     -0.00 knots Slack
Sun -- 07:27 PM EDT     Sunset
Sun -- 09:33 PM EDT     -3.37 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.322.42.72.92.72-1.3-2.7-3.2-2.9-2-0.31.62.12.52.82.82.30.4-2.5-3.3-3.3-2.7

Weather Map and Satellite Images
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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 (12,3,4,5)
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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 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.