Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Pocasset, MA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:14AMSunset 8:06PM Wednesday May 23, 2018 6:10 PM EDT (22:10 UTC) Moonrise 1:55PMMoonset 2:22AM Illumination 66% 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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ANZ234 Buzzards Bay- 342 Pm Edt Wed May 23 2018
Tonight..SW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft. A slight chance of showers this evening.
Thu..N winds 5 to 10 kt, becoming se in the afternoon. Seas around 2 ft.
Thu night..SW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Fri..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft.
Sat..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..W winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Sun..NE winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Vsby 1 to 3 nm.
Sun night..NE winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. Vsby 1 to 3 nm.
Mon..E winds around 5 kt. Seas 1 foot or less. A chance of showers. Vsby 1 to 3 nm.
Mon night..S winds around 5 kt. Seas 1 foot or less. A chance of showers. 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 342 Pm Edt Wed May 23 2018
Synopsis for massachusetts and rhode island coastal waters.. High pressure will build over the waters on Thursday and will settle south of the waters on Friday. A cold front will slowly settle across the waters from the north on Saturday. This front will become mainly stationary over the waters for Sunday and Monday. 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 Pocasset, MA
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location: 41.68, -70.62     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 232040
afdbox
area forecast discussion
national weather service boston norton ma
440 pm edt Wed may 23 2018

Synopsis
Other than a few brief showers possible this evening across
eastern ma, dry weather will continue for the remainder of the
work week with very warm temperatures for Friday afternoon.

Warm and humid conditions continue on Saturday ahead of an
approaching cold front from northern new england, bringing
scattered showers and isolated thunderstorms late Saturday into
Saturday night. The front stalls south of the region, with
patchy showers lingering through the remainder of the holiday
weekend.

Near term until 6 am Thursday morning
305 pm update...

a secondary cold front across northern new england will drop
southward into our region this evening. This may trigger a few
brief spot showers across eastern ma during the evening hours
with even a low risk for a rumble of thunder. Limited moisture
though and diminishing instability will keep any of this
potential activity short-lived and isolated.

This potential activity across eastern ma should wind down by
late evening. Otherwise... Dry weather with overnight lows
bottoming out in the upper 40s to the middle 50s.

Short term 6 am Thursday morning through Thursday night
Thursday...

large high pressure in control will result in plenty of sunshine
and a beautiful day. Somewhat cooler mid level temps behind
tonight S cold front will keep high temps mainly in the 70s.

However... Weak pressure gradient will allow for sea breezes
holding high temperatures in the 60s along the coast.

Thursday night...

high pressure will move off the coast Thu night allowing for a
return south to southwest flow of milder air. Initially
boundary layer may decouple enough to allow for overnight lows
to drop into the upper 40s to the lower 50s near or just after
midnight in some locations. However... Some boundary layer
mixing may occur resulting in rising temps toward daybreak in
locations that are able to decouple for a time.

Long term Friday through Wednesday
Overview...

12z model suite continues to signal the flattening of the
northern stream h5 ridge across the great lakes into southern
ontario by this weekend. A broad, nearly zonal steering flow
will take over through the holiday weekend into early next week.

Short wave in the northern stream flow will shift E late
sat Sat night, which looks to merge with another short wave
working s-sw out of northern new england as a backdoor cold
front moves across. SW winds ahead of this front will bring
moisture up the eastern seaboard, along with the moisture
associated with the southward bound cold front.

The front should clear the S coast Sunday morning, bringing
cooler temperatures, then stalls in the zonal flow off the s
coast early next week. This may mean a continued unsettled
pattern with patchy showers until later Tuesday as another front
pushes SE out of central canada. Medium range models continue
to signal drier conditions with near normal temperatures by the
middle of next week.

Details...

Friday and Friday night...

high pressure off the mid atlantic coast will bring a warm w-sw
wind flow across most of the region. However, it will be cooler
along the S coast with the onshore wind. Excellent mixing in
place through h85, so expect temps to rise to the mid and upper
80s away from the S coast. May also see w-sw winds gusting up to
20-25 kt along the immediate S coast, CAPE cod and the islands.

Dewpts slowly increase Fri night with the SW wind flow, so
temps will only fall back to the upper 50s to mid 60s, coolest
along the immediate S coast.

Saturday and Sunday...

clouds increase from n-s as a backdoor cold front works s-sw
out of northern new england. Noting dewpoint pooling, up to the
lower-mid 60s by late Sat or Sat night. Pwats also increase to
around 1.5 to 1.7 inches Sat night, highest along the S coast.

Best instability also moves in as the front approaches, with
total totals from 48-50, k indices up to 30-35 and tq values in
the upper teens. So, have mentioned slight chance for
thunderstorms starting across NE mass around 21z or so sat, then
spreading S Sat night. Highs will again reach the 80s away from
the S coast.

The front should slowly push across the region through around
12z sun, then stall just off the S coast as it becomes parallel
to the mid level steering flow. Spotty showers may linger
through Sunday as moisture continues to feed up the coast and
along the stalled front. Easterly winds set up, so cooler temps
will prevail. Expect readings to only reach the lower 60s along
the immediate E coast, ranging to the lower 70s across the ct
valley.

Monday through Wednesday...

expect continued unsettled conditions Monday into Tuesday with
the stalled front remaining off the S coast. May see a weak wave
move along the front during Monday, which may enhance some of
the scattered showers. Then, another front pushes SE out of
central canada during Tuesday. This should push the moisture s
of the region, though a few showers may still linger especially
around the route 2 area of N mass.

Medium range in fairly good agreement in pushing another large
high pressure center out of southern ontario into the northeast
u.S. By next Wednesday. This should bring dry conditions and
near seasonal temperatures.

Aviation 21z Wednesday through Monday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ...

tonight through Thursday night... High confidence in mainlyVFR
conditions right through Thursday night. A few brief showers are
possible this evening across eastern ma. Otherwise... The main
issue will be timing the arrival departure of diurnal sea
breezes along portions of the coast.

Kbos terminal... High confidence inVFR conditions. Sea breeze
should come to an end by late afternoon early evening.

Kbdl terminal... High confidence inVFR conditions.

Outlook Friday through Monday ... Moderate confidence.

Friday through Friday night:VFR. Breezy.

Saturday: mainlyVFR, with local MVFR possible. Breezy. Chance
shra.

Saturday night: mainly MVFR, with local ifr possible. Chance
shra, slight chance tsra.

Sunday through Sunday night: mainly MVFR, with local ifr
possible. Chance shra.

Memorial day: chance shra.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Thursday night ...

tonight and Thursday... High confidence. A weak pressure gradient
with high pressure in control will keep winds and seas below
small craft advisory thresholds.

Thursday night... Moderate to high confidence. High pressure
moving off the coast will result in southwest winds developing.

Enough of a low level jet may result in marginal small craft
conditions with southwest wind gusts of 20 to 25 knots and
marginal 3 to 5 foot seas across the outer-waters.

Outlook Friday through Monday ... Moderate confidence.

Friday: moderate risk for small craft advisory winds with local
gusts up to 30 kt. Areas of seas approaching 5 ft.

Friday night: moderate risk for small craft advisory winds with
gusts up to 30 kt. Local rough seas.

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

Saturday night: winds less than 25 kt. Seas locally approaching
5 ft. Chance of rain showers, areas fog, slight chance of
thunderstorms. Local visibility 1 to 3 nm.

Sunday: winds less than 25 kt. Seas locally approaching 5 ft.

Chance of rain showers.

Sunday night: winds less than 25 kt. Local rough seas. Chance
of rain showers, areas fog. Local visibility 1 to 3 nm.

Memorial day: 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... None.

Synopsis... Frank evt
near term... Frank
short term... Frank
long term... Evt
aviation... Frank evt
marine... Frank evt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 8 mi85 min 2.9 70°F 1012 hPa60°F
BZBM3 - 8447930 - Woods Hole, MA 11 mi40 min 61°F 58°F1011.8 hPa
44090 19 mi40 min 56°F
44020 - NANTUCKET SOUND 22 mi30 min SW 1.9 G 3.9 59°F 56°F1011.7 hPa56°F
FRVM3 - 8447386 - Fall River, MA 29 mi40 min 76°F 60°F1011.7 hPa
BUZM3 - Buzzards Bay, MA 29 mi70 min SW 16 G 16 62°F 1012.2 hPa (-0.8)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 29 mi40 min SSW 13 G 15 72°F 1010.9 hPa
FRXM3 30 mi40 min 75°F 59°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 38 mi40 min SW 5.1 G 9.9 71°F 1011.2 hPa
NAXR1 - Narragansett Bay Reserve, RI 38 mi85 min SSW 6 73°F 1011 hPa61°F
NWPR1 - 8452660 - Newport, RI 39 mi40 min SSW 11 G 14 63°F 57°F1011.4 hPa
NTKM3 - 8449130 - Nantucket Island, MA 39 mi40 min WSW 6 G 8.9 67°F 60°F1012 hPa
CPTR1 - 8452944 - Conimicut Light, RI 39 mi40 min S 16 G 17 67°F 62°F1010.9 hPa
PVDR1 41 mi40 min SSE 9.9 G 12 69°F 1011 hPa64°F
QPTR1 - 8454049 - Quonset Point, RI 42 mi40 min S 13 G 14 65°F 56°F1011.4 hPa
FOXR1 - 8454000 - Providence, RI 42 mi40 min SSW 8.9 G 13 76°F 55°F1010.6 hPa
44018 - SE Cape Cod 30NM East of Nantucket, MA 44 mi80 min S 7.8 G 9.7 58°F 1 ft1010.9 hPa (-0.9)54°F
44013 - BOSTON 16 NM East of Boston, MA 46 mi80 min SSE 14 G 16 60°F 57°F1 ft1009.9 hPa (-1.6)55°F

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, MA5 mi16 minSW 1210.00 miFair68°F59°F73%1011.8 hPa
Plymouth, Plymouth Municipal Airport, MA17 mi19 minSSE 710.00 miFair74°F61°F64%1010.8 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA18 mi15 minSSW 1010.00 miFair71°F60°F68%1011 hPa
Marthas Vineyard Airport, MA19 mi18 minSW 810.00 miFair70°F59°F68%1011.8 hPa
New Bedford, New Bedford Regional Airport, MA19 mi18 minSSW 1010.00 miFair74°F61°F64%1010.7 hPa

Wind History from FMH (wind in knots)
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Last 24hrSW7CalmS6SW6SW7S7S5CalmCalmCalmW3SW6SW5W5W6W7W7SW105CalmCalmW9SW10SW11
1 day agoSW10
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SW9SW6SW6SW9
G15
SW7W4SW3CalmW5W5W3CalmCalmCalmS6SW9SW8SW10SW8SW8S12--SW10
2 days agoW11SW6CalmW3W4N4CalmN5NW3N7N5N6N5----NE9NE7CalmNE4S85
G11
S9S10SW12

Tide / Current Tables for Barlows Landing, Pocasset Harbor, Buzzards Bay, Massachusetts
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Barlows Landing
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Wed -- 02:22 AM EDT     Moonset
Wed -- 03:43 AM EDT     4.19 feet High Tide
Wed -- 05:15 AM EDT     Sunrise
Wed -- 09:45 AM EDT     0.20 feet Low Tide
Wed -- 01:55 PM EDT     Moonrise
Wed -- 04:17 PM EDT     4.36 feet High Tide
Wed -- 08:03 PM EDT     Sunset
Wed -- 10:34 PM EDT     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.42.33.344.23.62.61.50.70.30.20.40.91.82.83.84.34.23.42.31.30.70.40.3

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Wed -- 01:34 AM EDT     3.88 knots Max Flood
Wed -- 02:22 AM EDT     Moonset
Wed -- 04:51 AM EDT     -0.17 knots Slack
Wed -- 05:15 AM EDT     Sunrise
Wed -- 07:48 AM EDT     -4.44 knots Max Ebb
Wed -- 11:02 AM EDT     0.01 knots Slack
Wed -- 01:54 PM EDT     Moonrise
Wed -- 02:18 PM EDT     4.26 knots Max Flood
Wed -- 05:44 PM EDT     -0.20 knots Slack
Wed -- 08:03 PM EDT     Sunset
Wed -- 08:28 PM EDT     -4.24 knots Max Ebb
Wed -- 11:42 PM EDT     0.19 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.23.83.83.52.6-1.1-3.3-4.2-4.4-4-3-0.62.93.94.24.23.72.6-1.6-3.5-4.2-4.2-3.6-2.4

Weather Map and Satellite Images
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wmap_A
GOES 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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (18,4,5,8)
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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 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.