Monday, December11, 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 7:45AMSunset 4:20PM Monday December 11, 2017 2:44 PM PST (22:44 UTC) Moonrise 12:52AMMoonset 1:25PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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- 838 Am Pst Mon Dec 11 2017
Today..Light wind becoming S 5 to 15 kt in the afternoon. Wind waves 2 ft or less. Areas of fog and freezing fog in the morning.
Tonight..S wind 5 to 15 kt. Wind waves 2 ft or less. Areas of fog after midnight.
Tue..S wind to 10 kt in the morning becoming light. Wind waves 1 ft or less. Areas of fog in the morning.
Tue night..Light wind becoming N to 10 kt after midnight. Wind waves 1 ft or less.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
Wed night..N wind to 10 kt. Wind waves 1 ft or less.
Thu..Light wind becoming S 5 to 15 kt. Wind waves 2 ft or less.
Fri..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
PZZ100 838 Am Pst Mon Dec 11 2017
Synopsis for the northern and central washington coastal and inland waters..A 1040 mb high over eastern washington and lower pres offshore will result in moderate offshore flow through this evening. A dissipating front will move onshore this evening resulting in weakening easterly pres gradients. Light northerly offshore flow will prevail on Tuesday and Wednesday. A cold front will sweep through the waters late Thursday night or Friday.

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 111657
afdsew
area forecast discussion
national weather service seattle wa
900 am pst Mon dec 11 2017

Synopsis A strong upper ridge will maintain dry and stagnant
conditions across most of western washington through Wednesday,
although a weak system will dissipate over the coast Tuesday
morning. The ridge will break down by Thursday with rain returning
Thursday night and Friday. Wet weather will continue through the
weekend with strong moist flow over the area.

Short term There is a patch of fog over the puget sound area, but
otherwise skies are clear this morning. The fog will dissipate
giving sunny skies this afternoon. Gradients are generally light and
so are winds, though the cross-cascades gradient is around -12 mb
and there are gusty east winds near the cascades. Air quality
remains in the moderate category at most locations. The air
stagnation advisory that is in effect and will be extended to 2 pm
Thursday.

There is little change in the forecast today with the upper level
ridge firmly in place over the area. The inversion is still intact,
with temperatures at hurricane ridge, mount baker, and paradise on
mount rainier all in the 50s. The freezing level at kuil this
morning was 12,300 feet. Camp muir, at 10,000 feet on mount rainier,
was 41 degrees at 8 am, which is considerably warmer than everywhere
in the lowlands. Temperatures are well below freezing in the passes,
where cold air is flowing through from the east side. Highs today
will be in the 40s to lower 50s, except along the north coast where
downslope easterlies off the olympics will push temperatures into
the upper 50s.

A weak system will reach the coast tonight and dissipate. Will boost
pops a bit, into the chance category for the coast and possibly the
olympics tonight and early Tuesday morning. This weak system will
not have enough punch to bring rain to the puget sound area. There
will be an increase in clouds Tuesday, but skies will clear Tuesday
night as the upper level ridge strengthens again. Lows tonight
and Tuesday night will be in the mid 20s to mid 30s. Highs Tuesday
will be in the mid to upper 40s, rising to the upper 40s to mid 50s
Wednesday. Burke

Long term Previous discussion... Extended models remaining
consistent with the ridge breaking down and a series of systems
moving through western washington. Timing on the last few runs for
the first system has been a little slower than the current forecast.

Will go ahead and dry the forecast out for Thursday. With the models
showing good consistency have raised the pops into the likely or
higher category for Friday through Sunday. Rainfall amounts in the
central puget sound might not amount to much for the middle of
december with model solutions showing the area somewhat rain
shadowed over the weekend. Felton

Aviation A strong ridge at the surface and aloft over eastern
washington will slowly weaken through Tuesday morning. A weak
frontal system over the offshore waters and its associated upper
level trough will dissipate as it moves onshore tonight. Light
southerly flow aloft will become moderate southwesterly tonight
into Tuesday. The air mass is stable and dry with patchy low level
moisture in a surface inversion this morning. Mid and high level
moisture will spread onshore tonight with some low level moisture
over the coastal zones.

Observations show patchy shallow dense freezing fog around kbli
and around the seattle metro area. Expect whatever fog that is
around to scatter out by 19z leaving clear skies around the
region. While pressure gradients will relax somewhat tonight into
Tuesday morning, mid and high level moisture associated with the
offshore weakening front will spread inland tonight and southerly
gradients and mixing will increase. Hence expect less fog Tuesday
morning. MVFR and ifr ceilings with low level moisture from the
dissipating frontal system Tuesday morning are expected to be
confined to the northern coastal zones. Albrecht
ksea... Cameras and observations around the terminal show fog over
the water to the west and patchy fog around kbfi. Will keep the
tempo 1 2sm fzfg group in the terminal forecast until about 18z
then expect clear skies to prevail. Light southeast winds will
become more easterly tonight. Expect less chance of fog
development tonight and Tuesday morning with an increase in mid
and high level moisture and better mixing downward of dry air from
aloft. Albrecht

Marine A 1040 mb high over eastern washington and lower pres
offshore will result in moderate offshore flow through this
evening. East to southeast flow will decrease later tonight as a
weak frontal system now over the offshore waters dissipates as it
moves onshore. Small craft advisories continue through this
evening for the outer portions of the coastal waters, the west
entrance to the strait of juan de fuca, and the inner coastal
waters adjacent to the west entrance to the strait.

Light northerly offshore flow will prevail Tuesday and Wednesday.

A cold front will sweep through the waters late Thursday night
into Friday. Albrecht

Sew watches warnings advisories
Wa... Air stagnation advisory until noon pst today for admiralty inlet
area-bellevue and vicinity-bremerton and vicinity-east
puget sound lowlands-eastern strait of juan de fuca-everett
and vicinity-hood canal area-seattle and vicinity-southwest
interior-tacoma area-western skagit county-western whatcom
county.

Pz... Small craft advisory until 9 pm pst this evening 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.

Small craft advisory until 3 pm pst this afternoon for coastal
waters from CAPE flattery to james island out 10 nm-west
entrance u.S. Waters 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 mi44 min 44°F 50°F1028.6 hPa (+0.0)
TCMW1 - 9446482 - Tacoma Met, WA 6 mi44 min S 1 G 4.1
EBSW1 - 9447130 - Seattle, WA 19 mi44 min SSE 4.1 G 5.1 51°F 50°F1027.9 hPa (-0.3)
46121 21 mi40 min 5.8 45°F 1027.8 hPa33°F
WPOW1 - West Point, WA 23 mi44 min S 13 G 13 45°F 1027.9 hPa (-0.0)37°F
46120 30 mi40 min W 7.8 49°F 1027 hPa37°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 mi51 minSE 610.00 miA Few Clouds48°F32°F54%1028.2 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi51 minN 010.00 miFair44°F33°F65%1028.4 hPa
Renton Municipal Airport, WA13 mi51 minSSE 610.00 miFair47°F35°F63%1028 hPa
Tacoma / McChord Air Force Base, WA14 mi46 minN 010.00 miFair47°F39°F76%1028.8 hPa
Boeing Field - King County International Airport, WA14 mi51 minSSE 510.00 miFair48°F36°F63%1027.5 hPa
Pierce County-Thun Field, WA16 mi49 minN 010.00 miFair50°F35°F58%1027.4 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi1.8 hrsSSE 510.00 miFair45°F41°F90%1028.1 hPa

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Last 24hrN6N5N9N9N7N11N8N6NE4CalmCalmNE6CalmE5CalmE5S5CalmS3S4W5W3SE5SE6
1 day agoW3W3CalmCalmS4SE3SE6E6SE3CalmCalmSE6NW4NE6NE7N9NE5N6N7N6N4N3N4N4
2 days agoCalmW3CalmS4S4CalmCalmSE3SE5CalmCalmCalmCalmSE3CalmCalmCalmCalmCalmCalmSE4SW3CalmS3

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Mon -- 12:51 AM PST     Moonrise
Mon -- 04:48 AM PST     3.11 feet Low Tide
Mon -- 07:46 AM PST     Sunrise
Mon -- 11:47 AM PST     12.56 feet High Tide
Mon -- 01:25 PM PST     Moonset
Mon -- 04:18 PM PST     Sunset
Mon -- 06:45 PM PST     3.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
87.15.84.43.43.13.75.179.211.112.312.511.910.48.46.24.43.43.13.74.96.47.6

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Mon -- 12:52 AM PST     Moonrise
Mon -- 02:14 AM PST     0.04 knots Slack
Mon -- 05:05 AM PST     1.67 knots Max Flood
Mon -- 07:47 AM PST     Sunrise
Mon -- 09:07 AM PST     -0.06 knots Slack
Mon -- 12:01 PM PST     -1.37 knots Max Ebb
Mon -- 01:25 PM PST     Moonset
Mon -- 03:43 PM PST     0.01 knots Slack
Mon -- 04:19 PM PST     Sunset
Mon -- 05:57 PM PST     1.46 knots Max Flood
Mon -- 09:55 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-0.9-0.50.91.51.71.61.410.2-1-1.3-1.4-1.3-1.1-0.80.61.31.51.41.20.9-0.3-1

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 (17,4,5,8)
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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.