Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Snoqualmie, 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 7:00AMSunset 7:28PM Thursday March 23, 2017 3:30 AM PDT (10:30 UTC) Moonrise 3:46AMMoonset 1:37PM Illumination 18% 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 Puget Sound And Hood Canal- 247 Am Pdt Thu Mar 23 2017
Today..S wind 5 to 15 kt. Wind waves 2 ft or less. A chance of rain in the afternoon.
Tonight..S wind 5 to 15 kt becoming 10 to 20 kt in the evening. Wind waves 1 to 3 ft. Rain in the evening then showers likely after midnight.
Fri..S wind 5 to 15 kt becoming sw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft. Showers likely in the morning then showers in the afternoon.
Fri night..SW wind 5 to 15 kt becoming S 10 to 20 kt after midnight. Wind waves 1 to 3 ft.
Sat..Variable wind 5 to 15 kt. Wind waves 2 ft or less.
Sat night..NW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sun..Light wind becoming sw to 10 kt. Wind waves 1 ft or less.
Mon..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
PZZ100 247 Am Pdt Thu Mar 23 2017
Synopsis for the northern and central washington coastal and inland waters..A vigorous frontal system about 350 nm west of the pacific northwest coast early this morning will move into the coastal waters today and inland across western washington tonight. A trough will follow the front on Friday...and weak high pres will build over the region Saturday. A relatively weak pacific frontal system will move through the region Sunday night.

7 Day Forecast for Marine Location Near Snoqualmie, WA
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location: 47.53, -121.84     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 230957
afdsew
area forecast discussion
national weather service seattle wa
257 am pdt Thu mar 23 2017

Synopsis Rain will reach the coast this afternoon and the
interior this evening as a front moves onshore. An upper trough
will bring showers Friday. Showers will decrease Saturday as the
trough shifts inland. Additional fronts will reach the area Sunday
and around Wednesday.

Short term Today will be mostly dry in between weather systems
with weak high pressure aloft. The exception will be the coast
where a frontal system will bring rain in the afternoon. The
front will move onshore this evening for rain all areas, with
decreasing showers behind the front later tonight. The mountains
will pick up some snow but amounts look sub-advisory. There will
also be some breezy to windy conditions coast and north interior.

An upper trough will move over the area on Friday for showers. A
short wave in the flow aloft should enhance showers in the
afternoon. There might even be an afternoon thunderstorm or two
but the chances look marginal enough that thunderstorms were not
introduced into the forecast just yet. The upper trough will
slowly shift inland Friday night and Saturday. There will be
enough lingering instability for a continued chance of showers but
the trend should be for drying. Schneider

Long term The pattern will be progressive the first half of
next week with a series of weather systems bringing rainy periods
interspersed with brief periods of relative dry weather in
between. The first frontal system will reach the area Sunday.

Models are in good agreement with this. Beyond, Sunday,
confidence in the details decreases as models differences
increase. There may or may not be another period of more organized
rain Monday night/early Tuesday. There is higher confidence that
a frontal system will bring another batch of rain Wednesday.

Schneider

Aviation Westerly flow aloft over western washington early this
morning will back to southwest today as the next frontal system
approaches the region from the west. Strong southwest flow aloft
will accompany the frontal system as it moves through the forecast
area late today and tonight. Except for briefing drying midday
today, the air mass will be moist and slightly unstable.

Vfr conditions prevail across the forecast area at this time with
sky cover sct035 ovc070-090, except isolated showers continue with
local bkn-ovc035.VFR conditions should continue today; ceilings
will probably be above 060 most of the time, except for areas of
sct-bkn035 this morning. As rain associated with the frontal
system develops tonight, conditions should deteriorate to MVFR on
the coast but generally remainVFR inland with ceilings 035-060.

Ksea... South wind 6-12 kt, increasing to 8-16 kt this evening.

By midnight. Ksea will likely haveVFR conditions today with
ceilings mainly above 060, then ceilings 035-060 with rain at
times beginning this evening. Mcdonnal

Marine A vigorous frontal system about 350 nm west of the
pacific northwest coast early this morning will move into the
coastal waters today and inland across western washington tonight.

This system should produce fairly solid gales of 30 to 40 kt over
the coastal waters late today through tonight, with fairly brief
gales over the eastern strait of juan de fuca and northern inland
waters this evening into early Friday morning.

A trough will follow the front on Friday, with fairly widespread
small craft advisory winds likely. Weak high pres will build over
the region Saturday for a period of lighter winds. A relatively
weak pacific frontal system will move through the region Sunday
night. Mcdonnal

Hydrology The white river at r street near auburn is forecast to
remain near flood stage through at least Friday, primarily due to
releases from mud mountain dam. Elsewhere, river flooding is not
expected for the next 7 days.

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

Pz... Small craft advisory until noon pdt today for coastal waters
from CAPE flattery to james island 10 to 60 nm-coastal
waters from CAPE flattery to james island out 10 nm-coastal
waters from james island to point grenville 10 to 60 nm-
coastal waters from james island to point grenville out 10
nm-coastal waters from point grenville to CAPE shoalwater
10 to 60 nm-coastal waters from point grenville to cape
shoalwater out 10 nm.

Gale warning from noon today to midnight pdt tonight for coastal
waters from CAPE flattery to james island 10 to 60 nm-
coastal waters from CAPE flattery to james island out 10 nm-
coastal waters from james island to point grenville 10 to
60 nm-coastal waters from james island to point grenville
out 10 nm-coastal waters from point grenville to cape
shoalwater 10 to 60 nm-coastal waters from point grenville
to CAPE shoalwater out 10 nm.

Small craft advisory until 6 pm pdt this evening for east
entrance u.S. Waters strait of juan de fuca-northern inland
waters including the san juan islands.

Gale warning from 6 pm this evening to 3 am pdt Friday for east
entrance u.S. Waters strait of juan de fuca-northern inland
waters including the san juan islands.

Small craft advisory from 3 pm this afternoon to 6 am pdt Friday
for central u.S. Waters strait of juan de fuca-west
entrance u.S. Waters strait of juan de fuca.

Small craft advisory from 3 pm this afternoon to noon pdt Friday
for admiralty inlet.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 27 mi42 min S 5.1 G 8.9 45°F 47°F1018.8 hPa
WPOW1 - West Point, WA 33 mi30 min SSW 20 G 22 45°F 1018 hPa (+0.0)40°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi42 min SSE 5.1 G 7
TCNW1 - 9446484 - Tacoma, WA 35 mi42 min 44°F 47°F1019.3 hPa

Wind History for Seattle, Puget Sound, WA, WA
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N6
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton, Renton Municipal Airport, WA20 mi37 minSSE 610.00 miOvercast44°F37°F79%1019.3 hPa
Seattle, Seattle Boeing Field, WA24 mi37 minSSW 9 G 1610.00 miOvercast45°F39°F83%1018.6 hPa

Wind History from RNT (wind in knots)
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Last 24hrS5S4CalmS3S3CalmS9
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5SE5SE4SE5S7SE5E4SE6
1 day agoSE3CalmNW55NW4N3NW5NW5CalmSE6SE3E6E3E4SE5CalmCalmE4CalmE3SE3CalmSE3Calm
2 days agoNW10NW11NW9NW13NW10NW13NW14NW10NW11NW12NW10NW9NW10NW11NW6NW4NW4NW7NW5NW4N6N4NW3NW5

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
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Thu -- 03:23 AM PDT     10.12 feet High Tide
Thu -- 04:47 AM PDT     Moonrise
Thu -- 07:05 AM PDT     Sunrise
Thu -- 09:12 AM PDT     5.99 feet Low Tide
Thu -- 01:44 PM PDT     8.46 feet High Tide
Thu -- 02:38 PM PDT     Moonset
Thu -- 07:26 PM PDT     Sunset
Thu -- 08:53 PM PDT     1.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.68.39.510.1109.48.37.26.466.26.87.68.38.487.15.84.22.61.51.21.83.1

Tide / Current Tables for Seattle, Washington
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Seattle
Click for Map
Thu -- 03:22 AM PDT     10.43 feet High Tide
Thu -- 04:48 AM PDT     Moonrise
Thu -- 07:05 AM PDT     Sunrise
Thu -- 09:01 AM PDT     6.31 feet Low Tide
Thu -- 01:43 PM PDT     8.73 feet High Tide
Thu -- 02:38 PM PDT     Moonset
Thu -- 07:26 PM PDT     Sunset
Thu -- 08:42 PM PDT     1.25 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
78.79.910.410.39.68.57.46.66.36.57.27.98.68.78.27.35.84.22.51.51.323.5

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 (6,6,7,8)
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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.