Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Snoqualmie, WA

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:08AMSunset 9:10PM Thursday June 20, 2019 5:18 PM PDT (00:18 UTC) Moonrise 10:49PMMoonset 7:15AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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- 300 Pm Pdt Thu Jun 20 2019
Tonight..NW wind 10 to 20 kt north part. SW wind 10 to 20 kt south part. Wind all areas becoming S 10 to 20 kt after midnight. Wind waves 1 to 3 ft.
Fri..S wind 5 to 15 kt. Wind waves 2 ft or less.
Fri night..SW wind 10 to 20 kt becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat night..NW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sun..S wind 5 to 15 kt becoming N 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Sun night..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Mon..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
Tue..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 300 Pm Pdt Thu Jun 20 2019
Synopsis for the northern and central washington coastal and inland waters..High pres offshore with lower pres inland will result in varying degrees of onshore flow through early next week. Small craft advisory strength west wind is likely each afternoon and evening in the strait, with gales possible, especially Saturday.


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 202202
afdsew
area forecast discussion
national weather service seattle wa
300 pm pdt Thu jun 20 2019

Synopsis An upper level low will exit to the east keeping showers
confined to the cascades. Dry weather expected for Friday and
Saturday as weak high pressure builds in. Another trough will
approach the area late Saturday and settle over the region through
early next week.

Short term today through Saturday Current satellite shows that
skies continue to clear over the western half of the CWA this
afternoon... With some gaps starting to form over the eastern half as
well... Though not nearly as prominent. This is supported with a look
out the window here at the NWS office and... Lo and behold... There
are indeed some patches of blue sky present. Current radar is not
terribly impressive in the shower department... With some weak echoes
present over the cascades as well as over portions of mason and
lewis counties. Precip amounts associated with these are expected to
be light.

Pops will continue to diminish the remainder of today and tonight as
the upper level low responsible for the activity the past couple of
days pushes further east... Allowing for cloud cover to diminish and
drier conditions to set up. Models remain in pretty good agreement
for the near term... With an upper level ridge starting to assert its
influence starting Friday and continuing into Saturday. This will
result in clearing skies and interior high temps right around 70 for
both days while the coast is slow to warm up... Temps there lingering
right around 60. This ridge flattens out by Saturday evening as an
upper level low starts to approach from the gulf of alaska.

Minimal changes made to inherited forecast... Mostly just a touch up
here and there to incorporate latest model runs. Smr

Long term Sunday through Wednesday As the aforementioned upper
low starts to slowly sink southward... Will likely see clouds fill in
Saturday night with first chances of associated precip hitting the
coast and northern portion of the CWA on Sunday... Becoming more
widespread Sunday night and into Monday. Models agree that late
Monday night early Tuesday morning may afford a bit of a break as
the track of the low pulls it away from the coast some... The ecmwf
not quite as far out as the gfs. As such... The ECMWF shows a shorter
break with showers kicking back into the area early Tuesday
afternoon while GFS shows showers waiting until Tuesday evening.

Models realign some moving the system eastward to bring chance pops
over much of the area. The ECMWF is more aggressive with the
system... Having it further east Wednesday night than the GFS which
actually hangs the low up along the coast. The end result is
effectively the same in the forecast... Even though the reasons why
differ. And with the difference in these solutions being felt mostly
on Thursday... Which falls out of the scope of this discussion... It
feels appropriate to end this on a bit of a cliffhanger. Smr

Aviation Moist but drying northerly flow aloft will continue
tonight and Friday. At the surface, moderate onshore flow will
continue. The air mass is slightly unstable, with a cumulus field
over most of the land areas, but after sunset the air mass will
stabilize, the cumulus will disappear, and late tonight stratus will
form over most areas.VFR or no ceilings this evening will become
MVFR overnight.

Ksea... Discussion above applies. Wind will be southerly 4-8 kt
increasing to 8-12 kt this evening. Wind will make a run at turning
northerly for a few hours this evening, but will probably only get
to westerly. Chb

Marine Onshore flow of varying degrees of strength will continue
through early next week. Westerly flow in the strait will reach high
end small craft advisory levels this evening, and gale force winds
are not out of the question. There will be outflow advisory level
wind in admiralty inlet and the northern inland waters as well.

Onshore flow will continue into the weekend as high pressure remains
offshore. Westerly advisory level winds are possible each day in the
strait. Gales are possible Saturday evening. Chb

Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 5 pm pdt Friday 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 5 am pdt Friday for central u.S.

Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.

Small craft advisory until 5 am pdt Friday for admiralty inlet-
northern inland waters including the san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 33 mi79 min S 4.1 G 5.1 62°F 1018.7 hPa (-1.2)49°F
46120 34 mi34 min S 1.9 61°F 1017 hPa49°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi55 min NNW 2.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 35 mi55 min 68°F 53°F1018.4 hPa
46125 49 mi31 min Calm 64°F 1017.1 hPa50°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA20 mi26 minSSW 510.00 miOvercast68°F42°F39%1018.3 hPa
Boeing Field - King County International Airport, WA24 mi26 minS 710.00 miMostly Cloudy67°F41°F39%1017.8 hPa

Wind History from RNT (wind in knots)
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Last 24hrSW7
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SW6N5Calm3S4SE3CalmE4S5CalmS43SE3S3Calm3CalmCalmCalmCalm--S6SW5
1 day agoS43CalmCalmN6SW3S7S7S3SE5S5S7SE3CalmS5S7S6SW5SE6SE54SW66S9
2 days ago4W4SW5SW3S7S6S8S5CalmS5S4S4S3NW3N33N6N3NW6SW5CalmCalm54

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Thu -- 02:07 AM PDT     6.54 feet Low Tide
Thu -- 05:11 AM PDT     Sunrise
Thu -- 06:26 AM PDT     9.21 feet High Tide
Thu -- 08:17 AM PDT     Moonset
Thu -- 01:49 PM PDT     -1.30 feet Low Tide
Thu -- 09:10 PM PDT     Sunset
Thu -- 09:16 PM PDT     11.51 feet High Tide
Thu -- 11:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.176.56.87.68.59.19.18.36.94.92.70.6-0.9-1.3-0.41.54.16.89.210.811.511.310.4

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Thu -- 02:04 AM PDT     6.95 feet Low Tide
Thu -- 05:12 AM PDT     Sunrise
Thu -- 06:30 AM PDT     9.78 feet High Tide
Thu -- 08:18 AM PDT     Moonset
Thu -- 01:46 PM PDT     -1.38 feet Low Tide
Thu -- 09:09 PM PDT     Sunset
Thu -- 09:20 PM PDT     12.23 feet High Tide
Thu -- 11:50 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.67.477.38.199.79.78.97.35.22.80.6-1-1.3-0.41.74.37.29.711.412.21211.1

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Seattle, WA (20,4,5,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.