Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Mashpee Neck, 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 5:11AMSunset 8:04PM Thursday May 24, 2018 9:36 PM EDT (01:36 UTC) Moonrise 3:00PMMoonset 2:53AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 716 Pm Edt Thu May 24 2018
.small craft advisory in effect from Friday morning through late Friday night...
Tonight..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Areas of fog after midnight with vsby 1 nm or less.
Fri..SW winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 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 4 ft.
Sat night..S winds 5 to 10 kt, becoming E after midnight. Seas 2 to 3 ft. A chance of showers.
Sun..E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Sun night..E winds 10 to 15 kt with gusts up to 20 kt, becoming ne 5 to 10 kt after midnight. Seas 2 to 4 ft. A chance of showers.
Mon..E winds 5 to 10 kt. Seas 2 to 3 ft.
Mon night..S winds around 5 kt. Seas around 2 ft.
Tue..W winds 5 to 10 kt. Seas around 2 ft.
Tue night..N 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 716 Pm Edt Thu May 24 2018
Synopsis for massachusetts and rhode island coastal waters.. High pressure over the waters will settle offshore Friday and Saturday. A back door cold front will slowly settle south across the waters late Saturday. This front will become nearly stationary just south of the waters for Sunday and Monday. A cold front will cross the waters on 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 Mashpee Neck, MA
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location: 41.61, -70.44     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 242306
afdbox
area forecast discussion
national weather service boston norton ma
706 pm edt Thu may 24 2018

Synopsis
High pressure moves offshore tonight and Friday, bringing warmer
weather on gusty southwest winds. A cold front drops south across
the region late Saturday into Saturday evening and will bring
scattered showers and thunderstorms followed by much cooler and
unsettled weather Sunday with some improvement by Monday. Mainly
dry and warmer weather returns for Tuesday through Thursday as
high pressure moves in.

Near term until 6 am Friday morning
* low clouds fog affect south coastal areas tonight *
7 pm update...

stratus and fog bank slowly lifting north into SE coastal ct and
adjacent coastal ri. Given than blyr flow is veering to SW this
evening then W overnight, do not expect the low clouds and fog
to advance much further north than pvd-tan-pym before moving
east across CAPE islands after midnight then offshore around
daybreak. Hrrr is currently handling this fairly well and used
it as a basis for the low clouds and fog forecast. Localized
dense fog possible along the south coast.

Otherwise, clear skies expected tonight with light S SW winds.

Airmass remains dry enough to preclude valley fog. Lows should
drop back into upper 40s to mid 50s.

Short term 6 am Friday morning through Friday night
* some locations make a run at 90 degrees Friday *
high pressure moves offshore Friday and Friday night with
prevailing W SW flow. Forecast soundings show deep mixing with
decent 30-40kt low level jet, strongest near CAPE cod and
islands where strong inversion will be present. Thus, we should
see 25-35 mph gusts across much of sne with perhaps a few 40kt
gusts across SE ma.

Model 2-meter temperatures suggest highs easily reach into 80s
inland, if not 90 degrees in lower ct valley, merrimack valley,
and greater boston, especially given gusty W SW winds.

Dewpoints drop into 40s (or even upper 30s) during the
afternoon so it will just be a "dry heat" this time. Certainly
not humid.

Winds diminish Friday night but airmass remains warm in advance
of frontal boundary still well to our north. Lows should drop
back into 60s along with some mid and high clouds. Less
confident on low clouds fog returning to south coast so this may
need to be added in later forecasts.

Long term Saturday through Thursday
Highlights...

* very warm and humid Sat with sct afternoon showers t-storms
* much cooler with occasional showers sun
* some improvement Mon but below normal temps
* mainly dry and warmer weather returns Tue through thu
Saturday into Saturday night...

very warm airmass in place Sat ahead of approaching backdoor cold
front. 925 mb temps 22-23c supports highs upper 80s to perhaps some
lower 90s interior, but cooler near the south coast due to SW flow.

Dewpoints will be climbing into the 60s so it will be increasingly
humid. This front will move south into sne during mid late afternoon
reaching the south coast toward evening. Much cooler air will follow
with ene winds and sharply falling temps. Locations in NE ma may
drop into the 60s by late afternoon and there could be some gusty
winds here as well Sat evening as the cooler air rushes in.

Environment destabilizes ahead of the front with mlcapes approaching
1000 j kg with moderate deep layer shear. However, mid level lapse
rates are unfavorable and will likely by a limiting factor to
widespread convection. Still expect sct showers t-storms developing
in the afternoon and lingering into Sat evening.

Sunday into Monday...

much cooler airmass Sunday as high pres builds south from the
maritimes with NE flow. Models are also indicating a wave developing
on the frontal boundary south of new eng which will likely bring
some rain at times with cool NE winds and temps potentially
remaining in the 50s. Some improvement expected Monday with mainly
dry weather but still cool with lots of clouds and onshore winds.

Tuesday through Thursday...

mainly dry and warmer weather returns as mid level ridge builds into
the region with rising heights. Weak FROPA Tue but it should come
through dry then high pres builds into the region Wed thu. Temps
should warm back well into the 70s and some 80s.

Aviation 00z Friday through Tuesday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday night ...

high confidence. Ifr lifr stratus and fog lifting north and east
from the SE ct coast, likely advancing to vicinity of pvd-tan-
pym 02-05z then CAPE islands thereafter. Stratus and fog exiting
cape islands 09-12z. Increasing SW winds Friday with 25-30kt
gusts, especially across ri and eastern ma.VFR with diminishing
sw winds Friday night.

Kbos terminal... High confidence in taf. Stratus likely remaining
south of bos.

Kbdl terminal... High confidence in taf.

Outlook Saturday through Tuesday ... Moderate confidence.

Saturday:VFR. Breezy. Chance shra, chance tsra.

Saturday night: mainly MVFR, with local ifr possible. Breezy.

Chance shra, slight chance tsra.

Sunday: mainly MVFR, with areas ifr possible. Breezy. Chance
shra.

Sunday night: mainly MVFR, with areas ifr possible. Slight
chance shra.

Memorial day: mainly MVFR, with local ifr possible. Slight
chance shra.

Monday night: mainlyVFR, with local MVFR possible. Slight
chance shra.

Tuesday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Friday night ... High confidence.

Small craft advisories posted for all waters for increasing sw
winds tonight (ne ma waters) and Friday (remainder of ma ri
waters).

S SE flow this afternoon with local sea breezes. Should see
some 15-20kt gusts along south coastal near shore waters with
locally choppy seas due to incoming high tide. Fog and low
clouds linger on waters south of islands.

High pressure moving off the coast will bring increasing sw
winds tonight and Friday. Enough of a low level jet tonight to
bring marginal SCA conditions to NE ma waters, otherwise winds
increase during day Friday across all waters with strongest
gusts (30kt) near shore. Winds and seas gradually subside Friday
night.

Outlook Saturday through Tuesday ... Moderate confidence.

Saturday: winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers, slight chance of
thunderstorms.

Saturday night: low risk for small craft advisory winds with
gusts up to 30 kt across eastern ma waters. Seas locally
approaching 5 ft. Chance of rain showers, slight chance of
thunderstorms.

Sunday through Sunday night: winds less than 25 kt. Areas of
rough seas. Chance of rain showers.

Memorial day: winds less than 25 kt. Seas up to 5 ft. Slight
chance of rain showers.

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

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

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... Air quality ALERT from 11 am to 11 pm edt Friday for
riz001>008.

Marine... Small craft advisory from 10 am Friday to 2 am edt Saturday
for anz231>234.

Small craft advisory from 11 am to 8 pm edt Friday for anz230-
236-251.

Small craft advisory from 11 am Friday to 2 am edt Saturday
for anz235-237.

Small craft advisory until 8 pm edt Friday for anz250.

Small craft advisory from 8 am to 8 pm edt Friday for
anz254>256.

Synopsis... Kjc jwd
near term... Kjc jwd
short term... Jwd
long term... Jwd
aviation... Kjc jwd
marine... Kjc jwd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WAXM3 - Waquoit Bay Reserve, MA 5 mi111 min 1.9 56°F 1020 hPa48°F
44020 - NANTUCKET SOUND 12 mi46 min S 16 G 18 53°F 56°F2 ft1020 hPa49°F
BZBM3 - 8447930 - Woods Hole, MA 14 mi48 min 53°F 56°F1020.3 hPa
44090 17 mi36 min 54°F2 ft
NTKM3 - 8449130 - Nantucket Island, MA 29 mi48 min S 7 G 12 51°F 62°F1020.4 hPa
BUZM3 - Buzzards Bay, MA 35 mi96 min S 14 G 15 52°F 1020.9 hPa (+0.4)
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA 39 mi48 min S 8.9 G 12 55°F 1019.9 hPa
FRVM3 - 8447386 - Fall River, MA 39 mi54 min 55°F 60°F1020.6 hPa
FRXM3 40 mi48 min 55°F 50°F
44018 - SE Cape Cod 30NM East of Nantucket, MA 44 mi46 min SSW 16 G 18 54°F 2 ft1018.8 hPa (-0.0)46°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 48 mi54 min SW 5.1 G 9.9 54°F 1020.1 hPa
NWPR1 - 8452660 - Newport, RI 48 mi54 min S 8.9 G 12 53°F 57°F1020 hPa
NAXR1 - Narragansett Bay Reserve, RI 48 mi111 min SSW 6 55°F 1020 hPa52°F
CPTR1 - 8452944 - Conimicut Light, RI 49 mi48 min S 14 G 17 54°F 58°F1019.9 hPa

Wind History for Nantucket Island, MA
(wind in knots)    EDIT      (on/off)   Help
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SW5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Otis Air National Guard Base, MA6 mi41 minSSW 1110.00 miFair52°F46°F82%1020.7 hPa
Hyannis, Barnstable Municipal-Boardman Airport, MA10 mi40 minSSW 1210.00 miFair54°F46°F77%1019.7 hPa
Marthas Vineyard Airport, MA17 mi43 minS 910.00 miFair51°F48°F92%1020.4 hPa

Wind History from FMH (wind in knots)
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Last 24hrNW9
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NE5NE5NE7NE5E4SE9E5E6NE54
G11
S9SE10SE14SE15SE15SE12
G18
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1 day agoSW7S7S5CalmCalmCalmW3SW6SW5W5W6W7W7SW105CalmCalmW9SW10SW11SW11SW9
G15
W10SW10
2 days agoSW9
G15
SW7W4SW3CalmW5W5W3CalmCalmCalmS6SW9SW8SW10SW8SW8S12--SW10SW7CalmS6SW6

Tide / Current Tables for Cotuit Highlands, Nantucket Sound, Massachusetts
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Cotuit Highlands
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Thu -- 02:14 AM EDT     0.16 feet Low Tide
Thu -- 02:52 AM EDT     Moonset
Thu -- 05:14 AM EDT     Sunrise
Thu -- 09:01 AM EDT     2.60 feet High Tide
Thu -- 02:44 PM EDT     0.05 feet Low Tide
Thu -- 03:00 PM EDT     Moonrise
Thu -- 08:03 PM EDT     Sunset
Thu -- 09:37 PM EDT     2.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.50.20.20.511.52.12.52.62.421.40.70.20.10.30.61.21.82.32.62.62.4

Tide / Current Tables for Cape Cod Canal, Massachusetts Current
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Cape Cod Canal
Click for Map
Thu -- 02:47 AM EDT     3.92 knots Max Flood
Thu -- 02:53 AM EDT     Moonset
Thu -- 05:15 AM EDT     Sunrise
Thu -- 05:58 AM EDT     -0.15 knots Slack
Thu -- 08:51 AM EDT     -4.40 knots Max Ebb
Thu -- 12:06 PM EDT     0.19 knots Slack
Thu -- 03:00 PM EDT     Moonrise
Thu -- 03:25 PM EDT     4.27 knots Max Flood
Thu -- 06:43 PM EDT     -0.04 knots Slack
Thu -- 08:04 PM EDT     Sunset
Thu -- 09:28 PM EDT     -4.32 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.63.13.83.93.62.8-0.5-3.2-4.2-4.4-4-3.1-12.83.84.24.23.82.7-1.7-3.6-4.2-4.2-3.7

Weather Map and Satellite Images
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wmap_A
GOES 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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Wind Forecast for Boston, MA (21,6,7,8)
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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 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.