Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Port Townsend, WA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:05AMSunset 8:12PM Saturday April 21, 2018 4:07 PM PDT (23:07 UTC) Moonrise 9:44AMMoonset 12:37AM Illumination 41% Phase: Waxing Crescent; Moon at 7 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- 210 Pm Pdt Sat Apr 21 2018
Tonight..NW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sun..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Sun night..NW wind 5 to 15 kt becoming to 10 kt after midnight. Wind waves 2 ft or less.
Mon..Light wind becoming nw to 10 kt in the afternoon. Wind waves 1 ft or less.
Mon night..NW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Tue..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..NW wind to 10 kt. Wind waves 1 ft or less.
Wed..NW wind 5 to 15 kt easing to 10 kt. Wind waves 2 ft or less.
Thu..Light wind. Wind waves less than 1 ft.
PZZ100 210 Pm Pdt Sat Apr 21 2018
Synopsis for the northern and central washington coastal and inland waters..High pressure will build into the region through the weekend. Thermal low pressure will set up along the oregon coast Monday and Tuesday as an upper ridge shifts over the pacific northwest.

7 Day Forecast for Marine Location Near Port Townsend city, WA
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location: 48.12, -122.72     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 212130
afdsew
area forecast discussion
national weather service seattle wa
230 pm pdt Sat apr 21 2018

Synopsis the puget sound convergence zone will dissipate this
evening, and showers over western washington should end. An upper
ridge will build offshore Sunday for a sunny afternoon. The ridge
will move inland Monday, bringing a stretch of sunny warm days
that should continue through Thursday. An upper low moving into
oregon on Friday should result in cooler weather and more clouds.

Short term Westerly flow aloft continues over western
washington this afternoon, ahead of a weak upper trough
approaching from well offshore. Low level onshore flow continues
as well, but it is gradually weakening. The puget sound
convergence zone that formed early this morning more or less
dissipated as it reached the snohomish king county line, then
another one developed further north, and it is moving south into
the north seattle area. Outside of the convergence zone there have
been Sun breaks and spotty showers. Temperatures at 2 pm were in
the 50s.

Low level onshore flow will weaken further during the next few
hours and switch to northerly by midnight, so the convergence
zone should dissipate this evening. The shower activity elsewhere
will end this evening as well. The offshore trough, currently near
135w, will move to the coast late tonight and cross the cascades
around midday Sunday. The upper trough will bring some cloud cover
but probably no precipitation. Then dry northwest flow aloft will
prevail over the forecast area ahead of an upper ridge building
over the offshore waters. It will be fairly cool tonight, with the
overnight lows mainly around 40. Sunday will be mostly sunny in
the afternoon with highs a couple degrees above normal, in the mid
50s to lower 60s.

The ridge will continue to build as it moves into the pacific
northwest on Monday. At the same time a thermally induced surface
trough will extend northward along the pacific northwest coast
for low level offshore flow. This will result in sunny and warmer
weather, with highs Monday in the mid 60s to lower 70s.

The upper ridge will strengthen on Tuesday, with 500 mb heights
rising to around 5730 meters over western washington. Offshore
flow will increase too, and highs Tuesday should be in the upper
60s and 70s under sunny skies. Mcdonnal

Long term The upper ridge will remain over the region Wednesday
and Thursday, with light offshore flow continuing, and the lower
part of the atmosphere warming. On Thursday, the 850 mb
temperatures should be around +14c; that should be the warmest day
over the interior lowlands, with highs ranging from the upper 60s
in the north to the lower 80s in the south. The pattern will
probably break down Friday and Saturday, as an upper low begins
moving northeast from the california offshore waters into oregon.

That should at least induce a switch to onshore flow, resulting in
cooler weather with highs in the upper 50s and 60s. It could
produce some showers as well. Mcdonnal

Aviation At 230pm showers are mainly in the pscz over
king county. The pscz will move south and break up later this
afternoon or evening. There are a few showers elsewhere and areas of
clearing. A patch of high clouds is also moving through the area.

Expect dry weather on Sunday as an upper level ridge builds and the
air becomes dry and stable.

Ksea... The pscz is weak but over king county at 230pm. There will be
a period of variable winds and showers and then a north breeze and
probably clearing. After some high clouds, skies will clear tonight
as high pressure builds in. There could be morning low clouds, but
the uw wrfgfs didn't have them in the metro area, so I left them out
of the sea-tac taf.

Marine Onshore flow behind the front continues to ease this
afternoon and evening as high pressure builds into the area.

Thermally induced low pressure will develop along the coast early
next week with offshore flow and warm sunny weather.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 11 pm pdt this evening 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-coastal waters from point grenville
to CAPE shoalwater out 10 nm.

Small craft advisory for rough bar until 3 am pdt Sunday for
grays harbor bar.

Small craft advisory until 9 pm pdt this evening for central
u.S. Waters strait of juan de fuca-east entrance u.S.

Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 2 mi56 min SW 8 G 14 50°F 49°F1030.9 hPa
SISW1 - Smith Island, WA 15 mi78 min W 17 G 20 49°F 1029.7 hPa (+0.6)38°F
PBFW1 - Padilla Bay Reserve, WA 27 mi98 min WNW 8.9 55°F 1029 hPa40°F
46088 - New Dungeness, WA (Hein Bank) 28 mi48 min W 16 G 18 49°F 48°F3 ft1029.6 hPa40°F
46120 30 mi56 min NNW 9.7 51°F 1029.8 hPa40°F
FRDW1 - 9449880 - Friday Harbor, WA 33 mi92 min SW 19 G 22 51°F 48°F1028.8 hPa
WPOW1 - West Point, WA 35 mi68 min SSE 2.9 G 4.1 52°F 1030.1 hPa (+0.9)40°F
PTAW1 - 9444090 - Port Angeles, WA 38 mi92 min 13 G 15 49°F 48°F1030.1 hPa
EBSW1 - 9447130 - Seattle, WA 41 mi50 min ESE 6 G 8.9 51°F 49°F1030.2 hPa
46118 42 mi73 min S 7.8 51°F 1028.7 hPa42°F

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, WA17 mi72 minWSW 910.00 miMostly Cloudy54°F41°F62%1031.2 hPa

Wind History from NUW (wind in knots)
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Last 24hrN6NW5S4CalmS4SE44S20S16
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1 day agoW5W3W5CalmSW6SW13SW8N4W4SW3W6S4SE4SE5SE3SE4E5E4S8SE8S10NW3N5W5
2 days agoW6W6W6W5NW3NW5CalmCalmSE3CalmE4CalmCalm--E3CalmSE3W4W7W7W6W5W7W4

Tide / Current Tables for Point Hudson, Washington
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Point Hudson
Click for Map
Sat -- 01:36 AM PDT     Moonset
Sat -- 02:48 AM PDT     6.20 feet Low Tide
Sat -- 06:09 AM PDT     Sunrise
Sat -- 07:38 AM PDT     7.74 feet High Tide
Sat -- 10:44 AM PDT     Moonrise
Sat -- 02:54 PM PDT     -0.98 feet Low Tide
Sat -- 08:10 PM PDT     Sunset
Sat -- 11:11 PM PDT     8.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.56.86.36.26.46.87.37.67.77.36.24.52.50.6-0.6-1-0.50.72.23.95.67.18.28.6

Tide / Current Tables for Point Hudson, 0.5 mile E of, Washington Current
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Point Hudson
Click for MapFlood direction 115 true
Ebb direction 10 true

Sat -- 01:36 AM PDT     Moonset
Sat -- 01:52 AM PDT     0.00 knots Slack
Sat -- 04:21 AM PDT     0.48 knots Max Flood
Sat -- 05:55 AM PDT     -0.00 knots Slack
Sat -- 06:09 AM PDT     Sunrise
Sat -- 10:40 AM PDT     -0.62 knots Max Ebb
Sat -- 10:44 AM PDT     Moonrise
Sat -- 01:31 PM PDT     0.00 knots Slack
Sat -- 05:29 PM PDT     1.94 knots Max Flood
Sat -- 08:10 PM PDT     Sunset
Sat -- 08:49 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.200.30.50.4-0-0.2-0.3-0.5-0.6-0.6-0.5-0.20.41.11.61.91.91.40.7-0-0.2-0.3

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    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 Seattle, WA (19,4,5,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.