Thursday, August22, 2019 L-36.com


Marine Weather and Tides
Portsend, WA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:12AMSunset 8:13PM Thursday August 22, 2019 7:16 PM PDT (02:16 UTC) Moonrise 10:33PMMoonset 12:26PM Illumination 50% Phase: Third Quarter Moon; Moon at 22 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- 248 Pm Pdt Thu Aug 22 2019
Tonight..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Fri night..W wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat..S wind to 10 kt becoming ne 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Sat night..W wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun..W wind 10 to 20 kt becoming ne to 10 kt in the afternoon. Wind waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
Sun night..NW wind 5 to 15 kt becoming to 10 kt after midnight. Wind waves 2 ft or less.
Mon..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Tue..NW wind to 10 kt. Wind waves 1 ft or less.
PZZ100 248 Pm Pdt Thu Aug 22 2019
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will continue through early next week with high pressure offshore and lower pressure inland. A weak warm front will pass to the north Friday. A trailing weak cold front will dissipate over the coastal waters on Saturday.


7 Day Forecast for Marine Location Near Portsend, WA
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location: 48.1, -122.76     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 222202
afdsew
area forecast discussion
national weather service seattle wa
302 pm pdt Thu aug 22 2019

Synopsis
High pressure across western washington will be somewhat
suppressed by Friday as a low pressure system pushes across
central bc through Saturday. With a few showers around, the
weekend will be cloudier but with temperatures continuing near
normal. Next week a stronger ridge of high pressure will build
north into the region through mid week so temperatures will climb
above normal with more Sun and drier weather.

Short term tonight through Sunday
Cloudiness has remained rather stubborn across much of the area
today. Soundings indicate a shallow layer of relatively steep
lapse rates and higher moisture below 850 mb with a developing
subsidence inversion above. High pressure should continue to
steadily build in across the area over the next 12 hours with
heights peaking around 06z Friday morning. Satellite shows plenty
of cloudiness well to our northwest and this will track into the
area by daybreak Friday. A trough of low pressure will track well
north of the area on Friday, bringing the increase in cloudiness.

A few showers will skirt the far northern tier Friday but most
everywhere will remain dry with temperatures close to normal.

Heights will fall overnight Friday into early Saturday and the
main system slides east across central bc. A few showers may be
expected on Saturday but limited mostly to the coast, olympic
peninsula, and north cascades. Otherwise just cloudy skies and
temperatures cooling slightly below normal for Saturday. On Sunday
a strong ridge of mid level high pressure will attempt to push
northward as the trough over bc exits east. This will bring a slow
increase in 500mb heights late Sunday, but temperatures will not
respond and should remain near normal. Sunday will be mainly a dry
day with mostly to partly cloudy skies.

Long term Monday through Thursday
For next week the continued theme will be for the attempted
northward building of the strong 500 mb ridge to our south. Its
full northward push will be somewhat thwarted by another trough
pushing through central bc in the mon-tue timeframe. What does
appear a good bet is a warming trend from Monday on through mid-
week, as 500mb heights should peak in the 583-587dm range by late
Tuesday. The surface translation will be for temperatures well
into the low and mid 80s for most spots by Tuesday and Wednesday.

The surface pattern suggests a thermal trough and thus some degree
of low level offshore flow will be present to help boost temps as
well. Heights look to begin falling by Thursday as surface high
pressure also builds in, ending the offshore component of the
flow. This will bring cooling temps by Thursday. Next week looks
to be dry and warm to possibly very warm at times, and possibly into
the upper 80s south of seattle on Wednesday.

Aviation Visible satellite imagery this afternoon certainly
reveals bkn cloud cover hanging around longer than originally
forecast. Fortunately, gradually clearing can be seen and think by
the evening many TAF sites will scatter out. This brief period of
clearing, if it can materialize, will be short lived as a weak
weather system pulls to the north of washington and brings mid and
high clouds into the area. All in all, all remaining MVFR ceilings
this afternoon should improve toVFR by the evening. The risk of low
clouds Friday morning appears low, except maybe some patches near
hqm. Some areas of fog may develop as well, mostly likely for hqm
and olm. OtherwiseVFR will be the rule. Winds gradually turning
more westerly this afternoon will become light N NE this
evening overnight into Friday at under 10kts. West winds at clm may
be exception at around 10kts overnight with enhanced wind down the
strait.

Ksea... Slow improvement to MVFR conditions from this morning but
cigs expected to lift toVFR by early evening and scatter some. Any
brief scattering clearing will quickly give way to a mid-high deck
between 10k-20k overnight into Friday. Winds turning westerly thru
the afternoon then light (5kts or less) N NE overnight into Friday.

Kovacik

Marine Afternoon surface analysis along the west coast reveals an
expansive area of high pressure off the washington and oregon
coastline, nosing some into the interior of western washington.

Meanwhile, weak troughing was noted across eastern washington with a
thermal trough extending up the california coast into parts of
western oregon. This setup is allowing for onshore flow today, as
winds blow from higher pressure offshore to lower pressure inland.

Gradients are weak enough this afternoon to omit any headlines, as
earlier winds and swell across outer coastal waters diminished as
high pressure built east. As we progress towards evening, typical
diurnal push down the strait of juan de fuca will allow for a
marginal small craft event. Do not think these winds will bleed into
admiralty or northern inland waters so the advisory is capped the
central and eastern portion of the strait.

Winds across strait will die down Friday morning with little change
in the overall sfc pattern. Onshore flow will continue with a weak
system trekking to the north of the area. This will produce little in
the way of marine impacts, but it will increase mid and high level
cloud cover. Another round of westerlies will push down the strait
Friday evening, this time stronger, likely also running into
admiralty inlet and northern inland waters.

There will be potential for gale force winds down the strait
Saturday evening with little change in the overall synoptic setup
through the middle of next week.

Kovacik

Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 11 am pdt this morning for coastal
waters from CAPE flattery to james island 10 to 60 nm-
coastal waters from james island to point grenville 10 to
60 nm-coastal waters from point grenville to cape
shoalwater 10 to 60 nm-northern inland waters including the
san juan islands.

Small craft advisory from 6 pm this evening to 3 am pdt Friday
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 1 mi46 min NNE 5.1 G 5.1 67°F 54°F1018 hPa
SISW1 - Smith Island, WA 16 mi26 min E 2.9 G 2.9 66°F 1017.4 hPa (-1.1)48°F
46088 - New Dungeness, WA (Hein Bank) 27 mi26 min Calm G 1.9 62°F 55°F1017.1 hPa (-1.0)54°F
46120 30 mi32 min Calm 63°F 1016.5 hPa56°F
PBFW1 - Padilla Bay Reserve, WA 30 mi46 min N 4.1 69°F 1017 hPa53°F
FRDW1 - 9449880 - Friday Harbor, WA 34 mi40 min SW 1.9 G 2.9 65°F 54°F1017.4 hPa
WPOW1 - West Point, WA 35 mi76 min S 4.1 G 4.1 62°F 1018 hPa (-1.0)55°F
PTAW1 - 9444090 - Port Angeles, WA 36 mi40 min Calm G 1 66°F 52°F1017.6 hPa

Wind History for Port Townsend, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Whidbey Island Naval Air Station - Ault Field, WA19 mi20 minN 010.00 miA Few Clouds70°F50°F49%1018.4 hPa

Link to 5 minute data for KNUW

Wind History from NUW (wind in knots)
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Last 24hrSW6SW8SW10W9W5W3SW6W4CalmS3SE3SE4SE3NW3W4NW6W6W7NW9W7W6W6--Calm
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2 days agoCalmSW5SW5CalmCalmCalmCalmCalmCalmCalmCalmE3SE3NW3W4--NW5NW5NW5NW5NW4W5W6W6

Tide / Current Tables for Point Hudson, Washington
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Point Hudson
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Thu -- 03:31 AM PDT     1.86 feet Low Tide
Thu -- 06:14 AM PDT     Sunrise
Thu -- 10:14 AM PDT     5.75 feet High Tide
Thu -- 01:26 PM PDT     Moonset
Thu -- 02:45 PM PDT     4.35 feet Low Tide
Thu -- 08:11 PM PDT     Sunset
Thu -- 09:21 PM PDT     7.76 feet High Tide
Thu -- 11:33 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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53.62.51.91.92.43.144.85.55.75.65.34.84.44.44.65.15.86.67.37.77.67

Tide / Current Tables for Portsend, 0.5 miles S of Point Hudson, Washington Current
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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_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 (22,6,7,8)
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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.