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 1:20 AM PDT (08:20 UTC) Moonrise 3:46AMMoonset 1:37PM Illumination 19% 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- 840 Pm Pdt Wed Mar 22 2017
.small craft advisory in effect until midnight pdt tonight...
Tonight..S wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft. A chance of showers.
Thu..S wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of rain in the afternoon.
Thu night..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Rain in the evening then rain likely after midnight.
Fri..S wind 5 to 15 kt becoming 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Fri night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..S wind to 10 kt becoming sw in the afternoon. Wind waves 1 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 840 Pm Pdt Wed Mar 22 2017
Synopsis for the northern and central washington coastal and inland waters..Onshore flow across western washington will ease tonight. A vigorous pacific frontal system will move into the offshore waters Thu and inland Thu night...with gale force winds over much of the forecast area. A weak trough will follow the front on Fri and weak high pres will build over the region Sat. Another pacific frontal system will move through Sun 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 230409
afdsew
area forecast discussion
national weather service seattle wa
910 pm pdt Wed mar 22 2017

Synopsis Lingering scattered showers tonight fizzling out by
Thursday morning with most inland locations looking at dry
conditions for much of the day. The next system will approach the
area Thursday with rain beginning along the coast in the afternoon.

The slow moving front will not move completely through the area
until Friday. Post frontal showers will diminish Saturday with more
weather systems arriving late Sunday and again Wednesday.

Short term It is actually shaping up to be a pretty nice evening
ranging from a fairly picturesque sunset to a kinda-sorta clear
radar screen. There are some scattered areas of activity... Mainly
out on the olympic peninsula and a weakening convergence zone set up
over the snohomish-skagit county line. Downward trends continue on
the radar... So would expect activity to completely fizzle out during
the overnight hours.

Thursday looks to start off dry for W wa... How long the dryness
lasts will depend on location as the next system starts to impact
the coast in the early afternoon while the remainder of the area
looks to get a pass until the early evening. There may even be some
prospect for a few peeks at the Sun during the morning hours. Models
have remained pretty consistent that this next frontal system will
be slow to traverse the area with the main front ejecting by late
Friday morning. Post frontal showers will linger... Albeit being more
scattered... In the late morning and early afternoon before the upper
level trough associated with the front pushes through... Heightening
pops for the late afternoon and evening time frame. Activity
scatters out overnight Friday and early Saturday before another dry
period sets up. A dry period that... Sadly... Like the one for
Thursday... Will be best measured in hours and not days. Smr

Long term From previous discussion... The euro and GFS are in
broad agreement. The next system arrives from the southwest Sunday
afternoon and evening. Monday will be showery. Tuesday will be
mostly dry. Another system arrives around Wednesday. The best chance
for rain will be on the coast and in the mountains. High
temperatures will probably be within a few degrees of normal. Burke

Aviation Westerly flow aloft over western washington this
evening will continue tonight, then back to southwest Thursday as
the next frontal system approaches the region from the west. At the
surface, strong onshore flow that followed today's cold front will
ease this evening and turn weakly offshore late tonight. The air
mass will remain slightly unstable and moist, especially in the
lower to mid layers tonight and Thursday morning.

Vfr conditions prevail across the forecast area this evening sct025
bkn-sct045 bkn100; scattered showers are producing local bkn025
ovc040, but these should decrease and mostly end by midnight.VFR
conditions should continue Thursday with ceilings mainly above 060.

Ksea... Southwest wind 12-18 kt gusting 26 kt, becoming south and
easing to 6-12 kt by midnight. Ksea will likely haveVFR conditions
the rest of tonight and Thursday, with the ceiling 035-050 at times
tonight. Mcdonnal

Marine Strong onshore flow developed across western washington
late this afternoon followed the cold front that crossed the area
from the west. Onshore flow is easing rather quickly though, and the
gale warning for the westerlies in the central and eastern strait of
juan de fuca will end with the 9 pm forecast issuance.

A vigorous pacific frontal system will move into the offshore waters
Thursday and inland Thursday night. Gale force southerlies are
likely over the coastal waters, as well as the east entrance strait
of juan de fuca and northern inland waters. A weak trough will
follow the front on Friday, and weak high pressure will build over
the region Saturday. Another pacific frontal system will move
through Sunday night. Mcdonnal

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

With more rain on the way, the landslide threat will increase on
Friday with the elevated threat continuing into the weekend. Burke

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

Pz... Small craft advisory until 10 am pdt Thursday 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 10 am to 11 pm pdt Thursday 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 watch from Thursday evening through late Thursday night for
central u.S. Waters strait of juan de fuca-east entrance
u.S. Waters strait of juan de fuca-northern inland waters
including the san juan islands.

Small craft advisory until midnight pdt tonight for admiralty
inlet-central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca-puget sound and
hood canal.

Small craft advisory until 6 pm pdt Thursday for northern inland
waters including the san juan islands-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
EBSW1 - 9447130 - Seattle, WA 27 mi51 min S 6 G 11 46°F 47°F1018.7 hPa
WPOW1 - West Point, WA 33 mi81 min S 21 G 22 45°F 1017.9 hPa (+1.7)39°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi51 min SSE 4.1 G 6
TCNW1 - 9446484 - Tacoma, WA 35 mi51 min 44°F 47°F1019.2 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton, Renton Municipal Airport, WA20 mi28 minSSE 510.00 miMostly Cloudy44°F37°F76%1019.3 hPa
Seattle, Seattle Boeing Field, WA24 mi28 minS 710.00 miMostly Cloudy45°F39°F80%1018.8 hPa

Wind History from RNT (wind in knots)
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Last 24hrSE3CalmS5S4CalmS3S3CalmS9
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5SE5SE4SE5S7SE5
1 day agoNW3NW5SE3CalmNW55NW4N3NW5NW5CalmSE6SE3E6E3E4SE5CalmCalmE4CalmE3SE3Calm
2 days agoNW11NW11NW10NW11NW9NW13NW10NW13NW14NW10NW11NW12NW10NW9NW10NW11NW6NW4NW4NW7NW5NW4N6N4

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
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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 (4,6,7,8)
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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.