Sunday, December17, 2017 L-36.com


Marine Weather and Tides
Coupeville, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:55AMSunset 4:19PM Sunday December 17, 2017 5:33 AM PST (13:33 UTC) Moonrise 7:08AMMoonset 4:23PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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PZZ134 Admiralty Inlet- 247 Am Pst Sun Dec 17 2017
.small craft advisory in effect through this afternoon...
Today..SE wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain likely.
Tonight..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Rain.
Mon..NW wind 15 to 25 kt becoming variable to 10 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 1 ft or less in the afternoon. A chance of showers in the morning then a chance of rain in the afternoon.
Mon night..SE wind to 10 kt becoming 5 to 15 kt after midnight. Wind waves 2 ft or less.
Tue..S wind 10 to 20 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 to 4 ft.
Tue night..S wind 5 to 15 kt becoming se to 10 kt after midnight. Wind waves 2 ft or less.
Wed..Variable wind to 10 kt becoming light. Wind waves 1 ft or less.
Thu..Light wind. Wind waves less than 1 ft.
PZZ100 247 Am Pst Sun Dec 17 2017
Synopsis for the northern and central washington coastal and inland waters..A warm front will stall over the area today. A strong frontal system will move through the waters Monday night and Tuesday. An associated deepening surface low will track inland near or to the north of western washington Tuesday. Offshore flow will develop Wednesday and continue into Thursday.

7 Day Forecast for Marine Location Near Coupeville, WA
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location: 48.22, -122.69     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 171227
afdsew
area forecast discussion
national weather service seattle wa
427 am pst Sun dec 17 2017

Synopsis Rain will increase today as a warm front spreads
inland from the pacific. Then a cold front will stall over the
region on Monday. A strengthening low center will pass across the
area on Tuesday morning, and a strong cold front will bring wind
and heavy mountain snow. Lingering showers will continue Wednesday
morning, then an upper ridge will bring dry weather on Thursday
and Friday.

Short term Warm advection and strong west flow aloft around the
periphery of an upper ridge will push a warm front across western
washington today. The veered low-level wind profile is classic of
a warm advection pattern. Isentropic lift will increase, with rain
expanding and becoming heavier this morning. Over the cascades,
snow levels will rise today, reaching the 4000-5000 foot range by
this evening. A winter weather advisory is in effect for the
cascades from king county north. Snoqualmie pass at 3000 feet
should not get much snow, but stevens pass and mount baker may
exceed 6 inches today.

Then tonight, a slow-moving cold front that is oriented parallel
to jet stream winds will slowly sag southward into western
washington before turning up stationary. This will provide an
effective focus for precip tonight and Monday morning. Plus,
strong west flow aloft will further enhance lift over the
cascades. This will bring heavy precip to the mountains. Later
shifts may need to issue a winter storm warning for parts of the
cascades for tonight and early Monday. For most of the night, snow
levels in the 4000-5000 foot range would lessen snowfall amounts
in the passes. Snow level should drop early Monday morning to
3000-4000 feet, just as precip rates come down some.

Rain may briefly end on Monday afternoon further north along the
strait and up near bellingham. Further south, Monday afternoon
will merely be a lull with lighter precip.

Way offshore between 130w and 140w, cyclogenesis will occur on
Monday along the front, with the new low center deepening quickly
to 1000 mb or less as it tracks toward southern vancouver island
or the north washington coast on Tuesday morning. Deepening lows
come with lots of large-scale lift and therefore heavy precip
rates. Once the low passes east of our longitude on Tuesday
afternoon, a sharply defined trailing cold front will move
southeast, bringing snow levels back down below 3000 feet by late
Tuesday. The sharp cold front will also act as a focus for heavy
precip, which will be shifting down toward southwest washington
late Tuesday. This setup should bring heavy snow to both the
olympic and cascade mountains, where snow will be measured in feet
at most locations other than perhaps snoqualmie pass. Even the
interior lowlands will get some heavy rain, with locations
outside of the olympic rain shadow getting 1 inch or more of rain
late Monday night through Tuesday afternoon. Should also have some
windy weather on Tuesday, but we may escape without land-based
wind highlights.

Long term Strong cold front will exit southeast from the
forecast area on Tuesday night. A compact cold core aloft will
follow the front, with 500 mb temps briefly dipping to near -34c
early Wed morning. Cold air aloft will support plenty of showers.

Later Wed morning, upper heights will rise in response to an upper
ridge axis near 140w bulging onto the coast. The air mass will
stabilize, and drier air will advect into western washington
thanks for northeast surface wind delivering drier continental
air from the interior of b.C.. Showers will quickly taper off on
Wednesday morning and end late wed.

Dry northwest flow aloft and upper ridging around 130w-135w will
keep the weather cool and precip-free for the rest of the week.

Haner

Aviation A warm front will stall over the area today with
westerly flow aloft. The air mass is moist and stable.

Ksea... MVFR low clouds are expected today. South wind 5-10 knots
will increase to 10-15 knots and become gusty today. Schneider

Marine A warm front will bring small craft advisory strength
winds to most waters today. There will be relative lull in between
weather systems Monday. A stronger frontal system will move
through the area Monday night and Tuesday. Gales are likely for
the coastal waters with this system. Offshore flow will develop
Wednesday and continue into Thursday. Schneider

Hydrology River flooding is not expected the next 7 days.

Sew watches warnings advisories
Wa... Winter weather advisory until 10 am pst Monday for cascades of
snohomish and king counties-cascades of whatcom and skagit
counties.

Pz... Small craft advisory until midnight pst tonight for coastal
waters from CAPE flattery to james island 10 to 60 nm-
coastal waters from CAPE flattery to james island out 10 nm-
coastal waters from james island to point grenville 10 to
60 nm-coastal waters from james island to point grenville
out 10 nm-coastal waters from point grenville to cape
shoalwater 10 to 60 nm.

Small craft advisory until 6 am pst Monday for coastal waters
from point grenville to CAPE shoalwater out 10 nm.

Small craft advisory until noon pst Monday for east entrance
u.S. Waters strait of juan de fuca.

Small craft advisory until 10 pm pst this evening for northern
inland waters including the san juan islands.

Small craft advisory from 4 pm this afternoon to midnight pst
tonight for west entrance u.S. Waters strait of juan de
fuca.

Small craft advisory from 10 pm this evening to noon pst Monday
for central u.S. Waters strait of juan de fuca.

Small craft advisory until 4 pm pst this afternoon for admiralty
inlet.

Small craft advisory until 4 am pst Monday for puget sound and
hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 8 mi52 min E 4.1 G 7 45°F 48°F1020.7 hPa
SISW1 - Smith Island, WA 11 mi94 min SE 18 G 21 44°F 1019.6 hPa (-2.1)
PBFW1 - Padilla Bay Reserve, WA 21 mi64 min SSE 12 44°F 1020 hPa41°F
46088 - New Dungeness, WA (Hein Bank) 26 mi44 min ESE 9.7 G 12 45°F 47°F1 ft1019.4 hPa (-1.1)43°F
FRDW1 - 9449880 - Friday Harbor, WA 28 mi58 min ESE 6 G 7 44°F 48°F1020.4 hPa
46120 35 mi43 min WSW 16 45°F 1020.1 hPa43°F
PTAW1 - 9444090 - Port Angeles, WA 40 mi58 min 2.9 G 2.9 43°F 47°F1019.7 hPa
WPOW1 - West Point, WA 41 mi94 min S 25 G 27 45°F 1021.2 hPa (-1.9)43°F
CPMW1 44 mi52 min SSE 20 G 23 44°F 47°F
CHYW1 - 9449424 - Cherry Point, WA 45 mi46 min SSE 19 G 21 44°F 1019.3 hPa
EBSW1 - 9447130 - Seattle, WA 47 mi46 min SE 6 G 9.9 44°F 50°F1021.4 hPa

Wind History for Port Townsend, WA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Whidbey Island Naval Air Station - Ault Field, WA10 mi38 minESE 710.00 miOvercast46°F41°F83%1021.4 hPa
Burlington/Mount Vernon, Skagit Regional Airport, WA22 mi39 minESE 8 G 139.00 miOvercast45°F41°F87%1020.7 hPa

Wind History from NUW (wind in knots)
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Last 24hrE5SE7SE8SE8SE8SE12SE10SE13SE12SE7SE7E8E6E6SE7SE6SE10E10E13SE11SE13SE13
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1 day agoSE4--E6SE8SE8SE6SE8SE7SE5SE6E4SE5E5N5SE4E6E73E6E6SE6E7E7E5
2 days agoSE3SE3SE5SE3CalmSE4E4CalmE6NW4E4SE3SE4SE6E5SE5SE8SE7SE7SE9SE7CalmE10SE9

Tide / Current Tables for Coupeville, Washington
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Coupeville
Click for Map
Sun -- 05:41 AM PST     11.72 feet High Tide
Sun -- 07:07 AM PST     Moonrise
Sun -- 07:56 AM PST     Sunrise
Sun -- 10:41 AM PST     6.87 feet Low Tide
Sun -- 03:39 PM PST     10.62 feet High Tide
Sun -- 04:17 PM PST     Sunset
Sun -- 04:23 PM PST     Moonset
Sun -- 10:31 PM PST     New Moon
Sun -- 10:41 PM PST     -0.83 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.33.66.28.710.511.511.710.99.587.16.97.58.59.610.410.69.88.36.13.51.1-0.5-0.8

Tide / Current Tables for Point Wilson, 1.4 miles NE of, Washington Current
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Point Wilson
Click for MapFlood direction 112 true
Ebb direction 297 true

Sun -- 01:49 AM PST     5.09 knots Max Flood
Sun -- 06:10 AM PST     -0.00 knots Slack
Sun -- 07:07 AM PST     Moonrise
Sun -- 07:56 AM PST     Sunrise
Sun -- 08:31 AM PST     -2.46 knots Max Ebb
Sun -- 11:23 AM PST     0.00 knots Slack
Sun -- 01:23 PM PST     1.39 knots Max Flood
Sun -- 04:04 PM PST     -0.00 knots Slack
Sun -- 04:17 PM PST     Sunset
Sun -- 04:24 PM PST     Moonset
Sun -- 07:55 PM PST     -4.42 knots Max Ebb
Sun -- 10:31 PM PST     New Moon
Sun -- 11:04 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.34.75.14.63.520.3-1.3-2.3-2.4-1.6-0.40.71.31.30.90.1-1.3-2.8-4-4.4-3.8-2.2-0.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (8,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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weather_mapweather_map weather_map

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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.