Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Madaket, MA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:42AMSunset 7:01PM Saturday March 23, 2019 5:01 PM EDT (21:01 UTC) Moonrise 10:10PMMoonset 8:30AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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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ANZ273 Expires:201901201822;;659034 Fzus71 Kbox 201812 Mwsbox Marine Weather Statement National Weather Service Boston/norton Ma 112 Pm Est Sun Jan 20 2019 Anz232-254-255-271>273-201822- /o.exp.kbox.ma.w.0002.000000t0000z-190120t1815z/ 112 Pm Est Sun Jan 20 2019
.the special marine warning will expire at 115 pm est... The affected areas were... Coastal waters extending out to 25 nm south of marthas vineyard and nantucket... Coastal waters from provincetown ma to chatham ma to nantucket ma out 20 nm... Nantucket sound... Ocean waters from marthas vineyard to nantucket from 25 to 45 nm offshore... Ocean waters from Montauk ny to marthas vineyard from 25 to 40 nm offshore... Ocean waters from provincetown to nantucket from 20 to 35 nm offshore... The Thunderstorms have moved out of the area and no longer pose a significant threat to boaters. Gale force winds continue. Lat...lon 4109 7039 4165 7040 4167 7025 4165 7023 4171 7017 4167 7014 4169 6999 4170 6997 4171 6998 4172 7002 4175 7000 4192 6931 4116 6956 4061 7047 4060 7059 time...mot...loc 1812z 220deg 65kt 4210 6940 4186 6954 4129 6972
ANZ200 334 Pm Edt Sat Mar 23 2019
Synopsis for massachusetts and rhode island coastal waters.. Strong low pres tracks thru the canadian maritimes this evening. West gales continue this evening and then slowly subside tonight. High pressure builds into the mid atlc region tonight and Sunday. A cold front then sweeps across the waters Mon followed by high pressure Tue and Wed. 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 Madaket, MA
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location: 40.5, -70.62     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 231937
afdbox
area forecast discussion
national weather service boston norton ma
337 pm edt Sat mar 23 2019

Synopsis
Dry, windy and cold conditions prevail through tonight. Milder
temperatures arrive Sunday, but it will turn colder again Monday
into the middle of next week.

Near term through tonight
Satellite imagery shows the trough well to our east, with mostly
clear skies prevailing. This continues overnight with dry
conditions and lows in the upper 20s. The main thing tonight
will be the winds. Given a tight pressure gradient on the back
side of the low and a 30-35kt LLJ at 925mb we continue to see
west winds gusting to 30-35 mph in spots. Winds will remain
elevated through the evening and into the overnight hours,
coming down steadily as the pressure gradient relaxes. Dry
overnight with lows dipping into the upper 20s.

Short term Sunday through Sunday night
Sunday and Sunday night...

under a weak shortwave ridge we'll see a very nice Sunday. Dry,
with plenty of Sun to start. Some high level then mid level
moisture begins to move in by afternoon so we'll see increasing
clouds from west to east during the latter half of the day. A
good warmup in store as temperatures will be 10-15 degrees
warmer than today, in the mid to upper 50s. This puts us about
10 degrees warmer than average for late march. Temperatures
along the south coast will be cooler, in the low 50s as west
winds become southwest and advect in a cooler marine influence.

Sunday night our next weak, moisture starved shortwave moves
through bringing a cold front in the early hours of Monday
morning. We still stand a chance of seeing some showers out of
this, but have trended pops down. Latest runs of the NAM and ec
have trended progressively drier with not enough moisture to
even get widespread light showers. For now keeping a slight
chance of mainly rain showers given the mild airmass (lows in
the low 40s overnight)... Could see some snow in the highest
terrain of western ma. If we see anything not expecting much in
the way of qpf.

Long term Monday through Friday
* dry through the week with high pressure building over the region
* colder weather follows through mid week, then temperatures look to
rebound late next week
details...

Monday...

light precip associated with the frontal passage may linger into the
late morning hours but will dissipate soon there after as dry air
pushes into the region. Monday will be cooler following the frontal
passage, but CAA looks slow to enter the region so temperatures will
likely be near normal in the mid 40s. Radiational cooling will be a
factor Monday night with clear skies and light NW winds. Models show
850 mb temps overnight dropping to near -15c, allowing
temperatures at the surface to cool into the teens and 20s.

Tuesday through Friday...

models show dry conditions through the week as a high pressure
begins to build over the region Tuesday, keeping skies clear but
temperatures below normal through Wednesday. Radiational
cooling will continue to be a factor through Wednesday evening,
keeping overnight lows well below normal.

As the high pressure shifts offshore Wednesday night, winds will
shift to the s-sw, returning temperatures above normal through the
end of the week.

Saturday...

as the high pressure departs new england Saturday, a low pressure
system approaches from over the great lakes bringing the next chance
for precipitation. Global models are not yet in agreement on timing,
but precipitation type will likely be rain given both the gfs
and ECMWF are signaling that 850 mb temperatures will not drop
below freezing after the frontal passage.

Aviation 19z Saturday through Thursday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ...

tonight... High confidence.

Vfr. Dry with diminishing west winds.

Sunday... High confidence.

Vfr, dry and modest west winds becoming southwest.

Sunday night:VFR. Breezy. Slight chance shra.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf
outlook Monday through Wednesday ...

Monday:VFR, with areas MVFR possible in the am.

Tuesday through Thursday:VFR. N-nw winds through Wed turning s-sw
Thursday.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ...

tonight ... Low center exits thru the maritimes. Gale force
winds diminish across the southern new england waters. Expect
west winds 20-30 kt. Dry weather and good vsby.

Sunday ... High pres off the mid atlc coast. Modest west wind
becoming wsw in the afternoon. Dry weather and good vsby.

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

Outlook Monday through Wednesday ...

Monday... Wave heights decrease throughout the day, generally staying
below 5 feet. NW winds under 25 knots.

Tuesday and Wednesday... Waves approaching 5 feet. N-nw winds remain
under 25 kts throughout the day. Winds turn to the south Wed night.

Thursday... Waves under 4 feet and s-sw winds less than 15 kts.

Box watches warnings advisories
Ct... None.

Ma... Wind advisory until 4 pm edt this afternoon for maz022-024.

Ri... None.

Marine... Gale warning until 8 pm edt this evening for anz231>235-237-
250-251-254>256.

Gale warning until 6 pm edt this evening for anz230-236.

Synopsis... Bw correia
near term... Bw
short term... Bw
long term... Correia
aviation... Bw correia
marine... Bw correia


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44097 - Block Island, RI (154) 42 mi31 min 42°F9 ft
NTKM3 - 8449130 - Nantucket Island, MA 61 mi31 min WNW 11 G 22 44°F 42°F1005.7 hPa
BUZM3 - Buzzards Bay, MA 66 mi61 min WNW 24 G 27 1007.8 hPa (+2.5)
44020 - NANTUCKET SOUND 71 mi21 min W 19 G 25 40°F 39°F1005.6 hPa30°F

Wind History for Nantucket Island, MA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nantucket, Nantucket Memorial Airport, MA60 mi68 minW 15 G 2710.00 miFair45°F28°F54%1004.9 hPa

Wind History from ACK (wind in knots)
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1 day agoE12E11E16--E16
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2 days agoS9S8S9S9S11S8S7S6SE7SE7SE8SE9SE11SE9E9SE16SE17SE18SE21
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E16E16

Tide / Current Tables for No Man's Land, Massachusetts
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No Man's Land
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Sat -- 04:12 AM EDT     -0.69 feet Low Tide
Sat -- 06:42 AM EDT     Sunrise
Sat -- 08:29 AM EDT     Moonset
Sat -- 10:10 AM EDT     3.36 feet High Tide
Sat -- 04:22 PM EDT     -0.49 feet Low Tide
Sat -- 06:58 PM EDT     Sunset
Sat -- 10:12 PM EDT     Moonrise
Sat -- 10:33 PM EDT     3.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.41.30.3-0.4-0.7-0.600.922.93.43.22.41.50.5-0.1-0.5-0.400.91.92.93.63.6

Tide / Current Tables for Nomans Land, Martha's Vineyard, Massachusetts
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Boston, MA (17,4,5,8)
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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.