Monday, April24, 2017 L-36.com


Marine Weather and Tides
Federal Way, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:00AMSunset 8:13PM Monday April 24, 2017 6:22 AM PDT (13:22 UTC) Moonrise 4:29AMMoonset 5:07PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 309 Am Pdt Mon Apr 24 2017
Today..SE wind 5 to 15 kt becoming N in the afternoon. Wind waves 2 ft or less. A chance of showers.
Tonight..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. A slight chance of showers.
Tue..S wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of rain in the morning then a chance of rain in the afternoon.
Tue night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..S wind 5 to 15 kt becoming sw 15 to 25 kt in the afternoon. Wind waves 2 ft or less building to 2 to 4 ft in the afternoon.
Wed night..SW wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft.
Thu..Variable wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..S wind to 10 kt becoming variable. Wind waves 1 ft or less.
PZZ100 309 Am Pdt Mon Apr 24 2017
Synopsis for the northern and central washington coastal and inland waters..A 1001 mb surface low will move eastward onto the northern oregon coast this morning...then move east of the cascades this afternoon. A weak surface ridge will drift across the waters early Tuesday. On Tuesday night...an occluded front will cross the waters. Strong onshore flow will develop behind the front on Wednesday and Thursday.

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 241304 cca
afdsew
area forecast discussion... Corrected
national weather service seattle wa
600 am pdt Mon apr 24 2017

Synopsis Showery weather will continue for much of the
upcoming week as a series of weather systems move through. There
should be a dry spell tonight and the first part of Tuesday
as high pressure aloft crosses the area. Another dry period is
likely Friday and Saturday.

Short term Current satellite and radar imagery line up fairly
well with GFS initializations this morning as upper level low sets up
shop just over the far northwestern tip of the state this
morning... And as such showers remain generally confined to the coast
and the southwestern quarter of the cwa. Progs have this system
dipping further south this afternoon before finally moving eastward
this evening. The southward dip is what will allow moisture to be
drawn up and thus spreading the threat of showers to much of the
area early this afternoon. Once the low starts moving east it is
game over as precip is expected to taper off pretty quickly with dry
conditions setting up in most places before midnight tonight.

Upper level ridging will take over during the overnight period and
into Tuesday morning. As usual... The relief proves brief as a front
associated with upper level low pressure to the north makes its way
onto the coast by mid-afternoon... Spreading precip eastward reaching
most locations by Tuesday evening. Shortwave disturbances in the
flow look to keep shower activity locked over the area into
Wednesday. It would be nice to point out that it looks like showers
will become more scattered in nature Wed afternoon and evening... Gfs
model runs have been going back and forth between wet solutions and
dry solutions every other run while the ecmwf... As usual... Favors a
wetter scenario. Clinging desperately to the hope that this active
pattern will eventually end... So have opted to side with drier gfs
solutions.

The upper low will shift eastward Thursday... Ramping up precip yet
again and resulting in continued wet conditions.

Temperatures in the near term look to hover in the lower to mid 50s
as the mix of precip and clouds prove to be a pretty big hurdle to
overcome as the quest to return to 60 slogs on. Smr

Long term As the aforementioned upper low continues to move east
Thursday evening showers look to taper off. Models remain consistent
in an upper level ridge following this feature and dry conditions
look to be on tap for Friday and into Saturday morning. Models
diverge here with... Shockingly... The ECMWF keeping conditions dry
for the bulk of the day Saturday while the GFS is more progressive
with yet another upper level low. Both models have some showers in
for Sunday thanks to the low from the previous sentence and also
continue to advertise a light at the end of the tunnel with an upper
level ridge over the area for the first half of next week. Would
absolutely love to bite on to this solution... But 24 hours ago
models were suggesting this ridge for the upcoming weekend. This
brings forth the question... Have the models just shifted their
timing... Or have they adopted a stick-and-carrot philosophy to lead
forecasters to their doom. Needless to say... Will be curious as to
what models will advertise 24 hours from now. Smr

Aviation An upper level low will move from western washington
to eastern oregon today. Meanwhile, a surface low will move by to
our south this morning. Moderate southwest flow aloft will become
light and variable later this morning, then become light
northwesterly tonight. The air mass will be moist and somewhat
unstable through this morning, then the air mass will become a
bit more stable with a shallowing of the moist layer late today.

Ksea... Will be near the northern fringe of a widespread area of
rain today. The air mass will be richly moist through tonight, so
mere thinning of cloud layers is expected. Northerly surface flow
for much of today will lead to some modest drying and scattering
of clouds. A return to s-sw surface wind this evening will spell
a quick return to a richly moist low- level environment, along
with a return of clouds at or below 020. Haner

Marine A 1001 mb surface low will move eastward onto the north
oregon coast this morning, then move east of the cascades this
afternoon. A weak surface ridge will drift across the waters early
Tuesday. On Tuesday night, an occluded front will cross the
waters. Following Tuesday night's front, strong onshore flow will
develop from Wednesday through Friday, with westerly gales
possible in the central and eastern strait of juan de fuca. Haner

Sew watches/warnings/advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 6 mi53 min 46°F 46°F1007.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 6 mi53 min SE 4.1 G 5.1
EBSW1 - 9447130 - Seattle, WA 19 mi53 min SE 1.9 G 4.1 46°F 48°F1007.4 hPa
46121 21 mi3 min 3.9 46°F 1006.5 hPa43°F
WPOW1 - West Point, WA 23 mi83 min S 11 G 11 47°F 1007.3 hPa (-0.8)44°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 mi30 minESE 49.00 miLight Rain45°F43°F93%1007.7 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi30 minN 010.00 miLight Rain44°F44°F100%1007 hPa
Renton, Renton Municipal Airport, WA13 mi30 minN 010.00 miLight Rain45°F45°F100%1007.6 hPa
Tacoma / McChord Air Force Base, WA14 mi85 minN 010.00 miLight Rain45°F44°F100%1007.6 hPa
Seattle, Seattle Boeing Field, WA14 mi30 minESE 310.00 miLight Rain46°F46°F100%1007.2 hPa
Pierce County-Thun Field, WA16 mi28 minN 09.00 miLight Drizzle43°F42°F100%1006.8 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi25 minVar 110.00 miLight Rain44°F42°F95%1007.9 hPa

Wind History from SEA (wind in knots)
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Last 24hrSE5S5SE4SE6SE6S5SE6S9S11S13S12S9SW9S7S7S8S7S6S6S8S6S5S5S5
1 day agoE10E7E8SE8S7SW13
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S7S8S7SW5S7S7S7CalmS3CalmSE3
2 days ago--CalmCalmN4CalmNE8N8NW7NW9NW9NW10N11N11N7NE8E13E12E11
G20
SE13E10E8E8E10SE7

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Mon -- 03:58 AM PDT     11.69 feet High Tide
Mon -- 05:29 AM PDT     Moonrise
Mon -- 06:03 AM PDT     Sunrise
Mon -- 10:30 AM PDT     1.76 feet Low Tide
Mon -- 04:34 PM PDT     10.33 feet High Tide
Mon -- 06:06 PM PDT     Moonset
Mon -- 08:11 PM PDT     Sunset
Mon -- 10:30 PM PDT     2.87 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.27.49.611.211.711.19.77.65.23.11.91.934.97.29.110.210.29.47.964.233

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Mon -- 01:51 AM PDT     -0.00 knots Slack
Mon -- 04:46 AM PDT     -1.49 knots Max Ebb
Mon -- 05:30 AM PDT     Moonrise
Mon -- 06:04 AM PDT     Sunrise
Mon -- 08:03 AM PDT     0.06 knots Slack
Mon -- 10:34 AM PDT     1.82 knots Max Flood
Mon -- 02:24 PM PDT     -0.00 knots Slack
Mon -- 05:08 PM PDT     -1.43 knots Max Ebb
Mon -- 06:07 PM PDT     Moonset
Mon -- 08:12 PM PDT     Sunset
Mon -- 08:12 PM PDT     0.05 knots Slack
Mon -- 10:47 PM PDT     1.83 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.40.9-0.5-1.1-1.4-1.5-1.3-1-0.31.31.71.81.61.30.6-0.8-1.3-1.4-1.3-1.1-0.51.11.71.8

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 (9,2,3,4)
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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.