Sunday, September24, 2017 L-36.com


Marine Weather and Tides
Shoreline, 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 6:59AMSunset 7:02PM Sunday September 24, 2017 5:19 AM PDT (12:19 UTC) Moonrise 10:36AMMoonset 8:39PM Illumination 15% Phase: Waxing Crescent; Moon at 4 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- 243 Am Pdt Sun Sep 24 2017
Today..Light wind becoming ne to 10 kt in the afternoon. Wind waves 1 ft or less. Patchy fog in the morning.
Tonight..N wind to 10 kt. Wind waves 1 ft or less. A slight chance of rain after midnight.
Mon..S wind to 10 kt. Wind waves 1 ft or less. A slight chance of rain.
Mon night..S wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Tue..Light wind. Wind waves less than 1 ft.
Tue night..N wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
Thu..Light wind. Wind waves less than 1 ft.
PZZ100 243 Am Pdt Sun Sep 24 2017
Synopsis for the northern and central washington coastal and inland waters..High pres offshore will result in light onshore flow today. Southerly flow will increase on Monday as a warm front clips the area. The flow will become light northerly on Tuesday due to higher pres over british columbia with lower pres over northern california. Offshore flow will develop on Wed as a thermal trough forms along the coast.

7 Day Forecast for Marine Location Near Shoreline, WA
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location: 47.7, -122.42     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 241014
afdsew
area forecast discussion
national weather service seattle wa
315 am pdt Sun sep 24 2017

Synopsis High pressure aloft will produce a dry mild day
today with clouds gradually increasing in advance of an incoming
weakening weather system. This system is expected to bring a chance
of rain tonight and Monday. Higher pressure aloft is expected to
build off the coast Tuesday and move onshore mid week for a period
of sunshine and above average late september temperatures.

Short term Current satellite shows clouds associated with
incoming shortwave just starting to nick the far northwestern tip
of the olympic peninsula at the time of this writing. While forecast
might be a touch aggressive with these clouds... Will let it ride as
the trend in the forecast looks to be ahead of the satellite trend
by a couple of hours or so. Starting to see some fog development
around hqm this morning and left inherited forecast alone regarding
fog so looks to be shaping up that the more prone areas may see a
bit of patchy fog this morning.

Generally models have remained consistent for the short term as a
shortwave system embedded in the ridge will enter the area this
afternoon bringing an increase in clouds. Temperatures should still
end up being a degree or two warmer than yesterday in spite of this.

Precip associated with this looks to hold off until Monday... And
that is where there will be a bit of a dip in area temperatures.

Precip coverage continues to look scattered on the GFS and both
models show the feature weakening throughout the day. This would
lead to thinking that the best chances will be on the coast while
interior locations may only see slight chance pops. Tuesday
continues to look like the transitional day... Starting off cloudy
with clouds finally dissipating by late afternoon early evening. The
most notable thing for Tuesday is that the warming trend will
return... With afternoon high temps jumping up 5 degrees on average
over the area when compared to those of Monday. Smr

Long term The ridge remains in control over W wa Wed and
thu... Allowing for dry and warm conditions to persist. Temperatures
will push into the mid 70s wed... And a shift to offshore flow thanks
to a developing thermal pressure trough will push the temps Thu into
the upper 70s and possibly a few locations seeing 80. While
climatologically this is uncommon... It would seem this summer is not
done with the area just yet.

The ridge shifts eastward Friday and an incoming upper level trough
will serve to cool things down after the brief summer flashback.

However... Models agree that any precip associated with this system
really breaks down by the time it arrives allowing for slight chance
pops at best. Smr

Aviation An upper level ridge will bring dry and stable weather
to the region today. The flow aloft is northerly. Patchy low
clouds or fog may form early this morning, mainly along the coast
and in the valleys. Otherwise,VFR conditions expected with mid
and high clouds. A weak warm front will spread rain to the coast
late tonight into Monday. 33
ksea... Patchy low clouds possible this morning for brief MVFR
conditions. Otherwise,VFR conditions expected. Light N winds
switching to light S early this morning. 33

Marine High pressure over the NE pacific will maintain light
onshore flow today. A warm front will clip the area on Monday
with possible small craft advisory winds over the coastal waters.

The flow will turn offshore by midweek as a thermal trough forms
along the coast. 33

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 3 mi79 min N 5.1 G 6 53°F 1021 hPa (+0.3)51°F
46120 4 mi38 min SE 1.9 53°F 1020.3 hPa50°F
EBSW1 - 9447130 - Seattle, WA 8 mi49 min SSW 2.9 G 2.9 55°F 56°F1021.1 hPa
TCMW1 - 9446482 - Tacoma Met, WA 29 mi49 min SE 1.9 G 1.9
TCNW1 - 9446484 - Tacoma, WA 30 mi49 min 50°F 55°F1021.2 hPa
46121 33 mi32 min 5.8 51°F 1020.3 hPa49°F
PTWW1 - 9444900 - Port Townsend, WA 34 mi49 min WSW 2.9 G 8 55°F 52°F1021.6 hPa
SISW1 - Smith Island, WA 48 mi79 min W 5.1 G 7 51°F 1020.8 hPa (+0.5)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA13 mi26 minN 010.00 miFair51°F48°F89%1020.9 hPa
Everett Snohomish County, WA16 mi26 minNNW 310.00 miFair51°F48°F92%1021.2 hPa
Renton Municipal Airport, WA17 mi26 minN 010.00 miFair50°F48°F93%1021.4 hPa
Seattle, Seattle-Tacoma International Airport, WA19 mi26 minE 310.00 miFair52°F46°F83%1021.4 hPa
Bremerton, Bremerton National Airport, WA24 mi23 minN 010.00 miFair44°F43°F96%1022.7 hPa

Wind History from BFI (wind in knots)
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Last 24hrSE5SE4SE4SE4SE4SW5SW6S65SW36W5N3NW8CalmNW5CalmCalmN4CalmCalmCalmCalmCalm
1 day agoSE4SE3SE4SE33CalmW54W8NW5N3N43CalmCalmCalmSE3SE5SE6SE7SE6S4CalmSE3
2 days agoSE5SE5SE5W3W33Calm43N3W5N5CalmNE3SE3CalmE3SE3S4CalmCalmSE4SE5S4

Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
Click for Map
Sun -- 02:05 AM PDT     1.12 feet Low Tide
Sun -- 06:59 AM PDT     Sunrise
Sun -- 08:43 AM PDT     9.96 feet High Tide
Sun -- 11:35 AM PDT     Moonrise
Sun -- 02:22 PM PDT     4.34 feet Low Tide
Sun -- 07:02 PM PDT     Sunset
Sun -- 08:07 PM PDT     9.85 feet High Tide
Sun -- 09:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.51.81.11.634.978.79.79.99.38.26.65.24.44.55.46.88.29.39.89.58.46.7

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Sun -- 02:37 AM PDT     0.00 knots Slack
Sun -- 05:16 AM PDT     0.56 knots Max Flood
Sun -- 06:59 AM PDT     Sunrise
Sun -- 08:42 AM PDT     -0.00 knots Slack
Sun -- 11:30 AM PDT     -0.42 knots Max Ebb
Sun -- 11:35 AM PDT     Moonrise
Sun -- 03:01 PM PDT     0.00 knots Slack
Sun -- 05:11 PM PDT     0.32 knots Max Flood
Sun -- 07:02 PM PDT     Sunset
Sun -- 07:55 PM PDT     -0.00 knots Slack
Sun -- 09:40 PM PDT     Moonset
Sun -- 11:29 PM PDT     -0.56 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-0.4-0.10.10.40.60.50.40.2-0.1-0.3-0.4-0.4-0.3-0.2-00.20.30.30.2-0-0.2-0.4-0.5

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 (8,2,3,4)
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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.