Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Seattle, WA

Version 3.4
What's New / NOTES
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 5:18AMSunset 8:54PM Wednesday May 24, 2017 10:00 PM PDT (05:00 UTC) Moonrise 4:04AMMoonset 6:31PM Illumination 0% Phase: New Moon; 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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PZZ135 Puget Sound And Hood Canal- 854 Pm Pdt Wed May 24 2017
Tonight..N wind 10 kt or less becoming light. Wind waves 1 ft or less.
Thu through Fri night..N wind 10 kt or less. Wind waves 1 ft or less.
Sat..Light wind. Wind waves less than 1 ft.
Sat night..NW wind 10 kt or less. Wind waves 1 ft or less.
Sun and Mon..N wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 854 Pm Pdt Wed May 24 2017
Synopsis for the northern and central washington coastal and inland waters..High pres offshore with lower pres inland will persist. Onshore or westerly flow will weaken the next few days.

7 Day Forecast for Marine Location Near Seattle, WA
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location: 47.68, -122.41     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 250412
afdsew
area forecast discussion
national weather service seattle wa
912 pm pdt Wed may 24 2017

Synopsis Temperatures will slowly rebound on Thursday, with
enough moisture and instability for a few afternoon showers and
thunderstorms over the cascades. A warm and dry upper ridge axis off
the coast on Friday will pass directly over western washington on
Saturday. Its warm and dry influence will continue from Sunday
through Tuesday, including memorial day.

Short term Northerly flow aloft will prevail until late
Friday. A weak upper level disturbance now over central portions
of british columbia will move southward into central portions of
western washington on Thursday. This weak disturbance will contain
enough lift and instability to allow showers and thunderstorms to
form over the cascades midday Thursday. The thunderstorm threat
will come to an end during the evening hours as the lower levels
stabilize with the loss of insolation and the weak disturbance
pulls away to the southeast.

The strong upper level ridge now just outside of 140w will shift
eastward into the offshore waters on Friday. The surface ridge
well offshore combined with lower pressure east of the cascades
will result in onshore flow, although it will be weaker. High
temperatures will reach well into the 70s over the northern half
of the forecast area on Friday, while areas of the interior south
of seattle reach into the lower 80s.

The upper ridge will finally move over the forecast area on
Saturday, and low level flow will become light. With strong late
may insolation, temperatures will rise another 3-5 degrees on
Saturday with many areas in the interior and away from the water
will rise into the lower to mid 80s. A beautiful start to the
memorial day weekend.

A minor forecast update was issued for tonight to remove the
shower threat across the area and for Thursday morning to reduce
the extent of the shower chances to mainly the northern portions
of the cascades. Otherwise, forecasts are in great shape this
evening and no updates are required. Albrecht

Long term From the previous long term discussion: the upper
ridge axis will move to eastern washington on Sunday and then stay
in place there until Tuesday. The turn to a mid-upper level
southerly flow component will start to support a couple of
afternoon showers and thunderstorms near the cascade crest each
afternoon and evening from Sunday through at least Tuesday.

Seabreezes along the immediate coast will hold afternoon highs in
the 60s there, but inland temperatures will be well above normal
each day.

By next Wednesday, it appears the upper ridge axis to our east
will flatten, with a more zonal flow pattern trying to develop.

Cooling onshore flow will spread further inland, but afternoon
temperatures will still remain above normal. The operational gfs
was cooler than most of its ensembles next wed. Haner

Aviation Wrn wa will remain between a ridge of high pres offshore
and an upper level trof over the interior W overnight. Contd nly
flow aloft. The low level flow will be weak onshore. Anticipate
areas of MVFR CIGS to dvlp overnight over the coast, possibly
spreading as far W and N as kpwt and ktcm between 0900 and 1200 utc.

Ksea...VFR. Winds will generally be light and variable overnight,
becmg NW near 10 knots Thursday afternoon.

Marine
High pressure centered over the northeast pacific along with lower
pressure east of the cascades will result in light onshore or
westerly flow through Friday. The offshore high will weaken and
redevelop farther west on Saturday, causing the flow to become light
northwest.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisories are in effect for the coastal waters.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 2 mi61 min NE 6 G 7 55°F 1013.9 hPa (-0.5)48°F
46120 6 mi44 min ENE 5.8 56°F 1013.3 hPa46°F
EBSW1 - 9447130 - Seattle, WA 7 mi61 min NW 4.1 G 6 59°F 52°F1013.9 hPa
TCMW1 - 9446482 - Tacoma Met, WA 28 mi61 min W 2.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 29 mi61 min 57°F 51°F1013.8 hPa
46121 32 mi1419 min 5.8 55°F 1013.2 hPa47°F
PTWW1 - 9444900 - Port Townsend, WA 35 mi61 min Calm G 1 54°F 51°F1014.6 hPa (-0.6)

Wind History for Seattle, Puget Sound, WA, WA
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NE1
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle Boeing Field, WA12 mi68 minNNW 410.00 miA Few Clouds59°F39°F49%1013.7 hPa
Renton, Renton Municipal Airport, WA16 mi68 minN 010.00 miFair60°F43°F53%1014 hPa
Everett Snohomish County, WA17 mi68 minVar 310.00 miPartly Cloudy55°F43°F64%1014.3 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi68 minN 610.00 miMostly Cloudy58°F41°F53%1014.3 hPa
Bremerton, Bremerton National Airport, WA24 mi65 minN 010.00 miFair52°F43°F72%1015.8 hPa

Wind History from BFI (wind in knots)
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Last 24hrE7NE7N4E5E5SE8S7SE4S5SE10S854SW8S435NE7653NW5N4Calm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmNW33CalmN54N8
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm34NW11NW10
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Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
Click for Map
Thu -- 04:13 AM PDT     11.51 feet High Tide
Thu -- 05:20 AM PDT     Sunrise
Thu -- 05:44 AM PDT     Moonrise
Thu -- 11:14 AM PDT     -2.34 feet Low Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 06:17 PM PDT     11.51 feet High Tide
Thu -- 08:47 PM PDT     Moonset
Thu -- 08:53 PM PDT     Sunset
Thu -- 11:37 PM PDT     5.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.87.39.110.711.511.19.67.24.31.3-1.1-2.3-1.9-0.12.65.88.610.611.511.310.28.66.95.7

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Thu -- 01:30 AM PDT     0.44 knots Max Flood
Thu -- 04:11 AM PDT     -0.00 knots Slack
Thu -- 05:20 AM PDT     Sunrise
Thu -- 05:44 AM PDT     Moonrise
Thu -- 07:50 AM PDT     -0.83 knots Max Ebb
Thu -- 11:32 AM PDT     0.01 knots Slack
Thu -- 12:46 PM PDT     New Moon
Thu -- 02:32 PM PDT     0.98 knots Max Flood
Thu -- 06:24 PM PDT     -0.00 knots Slack
Thu -- 08:47 PM PDT     Moonset
Thu -- 08:53 PM PDT     Sunset
Thu -- 08:53 PM PDT     -0.50 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.40.40.30.1-0.2-0.5-0.8-0.8-0.7-0.5-0.20.20.70.910.80.50.1-0.2-0.4-0.5-0.4-0.3

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 (1,6,7,8)
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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.