Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Federal Way, 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 6:08AMSunset 8:17PM Thursday August 17, 2017 12:13 PM PDT (19:13 UTC) Moonrise 12:40AMMoonset 4:12PM Illumination 21% Phase: Waning Crescent; Moon at 25 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 Inland Waters Of Western Washington And The Northern And Central Washington Coastal Waters Including The Olympic Coast National Marine Sanctuary Pzz135-180330- Puget Sound And Hood Canal- 1118 Am Pdt Thu Aug 17 2017
Today..Variable wind 10 kt or less. Wind waves 1 ft or less.
Tonight..N wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..Variable wind 10 kt or less. Wind waves 1 ft or less.
Fri night..N wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..N wind 10 kt or less. Wind waves 1 ft or less.
Sat night through Mon..N wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 Inland Waters Of Western Washington And The Northern And Central Washington Coastal Waters Including The Olympic Coast National Marine Sanctuary Pzz100-180330- 1118 Am Pdt Thu Aug 17 2017
Synopsis for the northern and central washington coastal and inland waters..Onshore flow of varying strength will continue through early next week due to persistent high pres offshore with lower pres east of the cascades.

7 Day Forecast for Marine Location Near Federal Way, WA
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location: 47.33, -122.34     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 171619
afdsew
area forecast discussion
national weather service seattle wa
920 am pdt Thu aug 17 2017

Synopsis Seasonable summer weather will affect the area today and
Friday with morning clouds and afternoon sunshine. A weak system
will brush the area late Friday into Saturday morning bringing
slightly cooler conditions and possibly areas of drizzle. High
pressure will rebuild over the region Sunday through Tuesday for a
dry and warmer weather.

Short term Marine stratus this morning has spread into all
but north interior and san juan islands with a bit of light drizzle
occuring over the central puget sound area north of king county. As
expected, stratus has already begun to thin in many areas. Expect
skies to scatter out to partly or mostly sunny skies through out the
interior through the late morning. Low clouds may linger along the
coast into the afternoon before clearing out there as well. Upper
level heights over the area will rise today as a trough digging into
the gulf of alaska produces some shortwave ridging downstream over
the pacific northwest. A weakening frontal system will pass to the
north of the area Friday with resulting in a slight chance of light
precipitation mainly for the north coast and possibly the north
interior north cascades during the afternoon. More than anything
this feature will likely act to increase mid and high level clouds
but do little to effect the status quo of seasonal, dry weather into
Saturday.

Long term From previous discussion... An upper level ridge
building over the pacific waters will start to flex its muscles over
w wa starting Sunday as 500mb heights increase... Signaling some
warming. This ridge will pass overhead Monday... With ecmwf
increasing the amplitude of its solution to match better with the
gfs... So overall looks like eclipse day should see mostly clear
skies. While the ridge axis passes over the cascades Tuesday... Temps
end up peaking Tuesday afternoon before an upper level trough... And
cooling temperatures... Enter the area for Wednesday. Smr

Aviation An upper level ridge will prevail over the region
today for westerly flow aloft. The low level flow will remain
onshore. Expect the MVFR CIGS (with areas of ifr CIGS MVFR vsbys)
that currently blanket much of the lower elevations to scatter
out by 2000 utc.

Ksea...VFR conditions will return by 2100 utc (2 pm pdt). Expect
low clouds (MVFR cigs) to return late tonight and will probably
be slower to clear out tomorrow. Light westerly winds will become
northerly late this afternoon. Expect winds to become light
southerly late tonight.

Marine
Onshore flow of varying strength will continue through early next
week due to persistent high pressure offshore with lower pressure
east of the cascades. The onshore flow will be strong enough
Friday night for the possibility of gale force winds over the
central and eastern strait of juan de fuca.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisories are in effect for the central and
eastern strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 6 mi43 min 65°F 55°F1022.9 hPa
TCMW1 - 9446482 - Tacoma Met, WA 6 mi43 min NW 5.1 G 6
EBSW1 - 9447130 - Seattle, WA 19 mi43 min NW 4.1 G 5.1 62°F 56°F1022.8 hPa
46121 21 mi39 min 3.9 62°F 1022.2 hPa57°F
WPOW1 - West Point, WA 23 mi73 min NNE 4.1 G 4.1 61°F 1023 hPa (+0.5)58°F
46120 30 mi36 min WSW 5.8 58°F 1022 hPa55°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA8 mi20 minWSW 410.00 miMostly Cloudy66°F55°F70%1023.4 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi20 minW 510.00 miOvercast65°F55°F73%1022.7 hPa
Renton Municipal Airport, WA13 mi20 minNW 410.00 miOvercast69°F57°F68%1022.8 hPa
Tacoma / McChord Air Force Base, WA14 mi75 minW 310.00 miOvercast65°F58°F81%1023 hPa
Boeing Field - King County International Airport, WA14 mi20 minN 410.00 miMostly Cloudy69°F57°F68%1022.4 hPa
Pierce County-Thun Field, WA16 mi38 minN 010.00 miOvercast66°F57°F73%1022.7 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi75 minNW 310.00 miOvercast65°F58°F81%1023 hPa

Wind History from SEA (wind in knots)
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Last 24hrW5W5W5W6W6W6SW7NW5SW3W5W4CalmSW3SW4SW5SW6S7S4CalmSW3W3W54W4
1 day agoNW9NW6W9W86N7N6N5NW7NW6N7NE13N10NE10NE5NE5NE4CalmSE4SE6S6SW84S4
2 days agoW3NW8W7W9N6NW6N8N7NW4N7N8N6NE8N4NE8N4NE6S3N4NE6N56W7N6

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Thu -- 12:22 AM PDT     11.14 feet High Tide
Thu -- 01:40 AM PDT     Moonrise
Thu -- 06:08 AM PDT     Sunrise
Thu -- 07:50 AM PDT     -0.58 feet Low Tide
Thu -- 03:11 PM PDT     10.39 feet High Tide
Thu -- 05:12 PM PDT     Moonset
Thu -- 08:10 PM PDT     6.67 feet Low Tide
Thu -- 08:16 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.1119.98.263.51.3-0.2-0.60.21.84.16.58.69.910.410.29.48.27.26.76.97.89

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Thu -- 01:32 AM PDT     -1.33 knots Max Ebb
Thu -- 01:41 AM PDT     Moonrise
Thu -- 04:40 AM PDT     0.00 knots Slack
Thu -- 06:09 AM PDT     Sunrise
Thu -- 07:41 AM PDT     1.68 knots Max Flood
Thu -- 12:00 PM PDT     -0.00 knots Slack
Thu -- 02:28 PM PDT     -1.15 knots Max Ebb
Thu -- 05:12 PM PDT     Moonset
Thu -- 05:51 PM PDT     0.00 knots Slack
Thu -- 08:00 PM PDT     1.22 knots Max Flood
Thu -- 08:17 PM PDT     Sunset
Thu -- 11:10 PM PDT     -0.04 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-1.3-1.3-1.1-0.70.51.21.61.71.51.30.90-0.9-1.1-1.1-0.9-0.70.211.21.10.80.2

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 (15,3,4,5)
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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.