Wednesday, December12, 2018 L-36.com


Marine Weather and Tides
Snoqualmie, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:45AMSunset 4:18PM Wednesday December 12, 2018 9:45 AM PST (17:45 UTC) Moonrise 11:36AMMoonset 9:29PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 920 Am Pst Wed Dec 12 2018
.small craft advisory in effect from 4 pm pst this afternoon through Thursday morning...
Today..S wind 5 to 15 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 ft or less building to 2 to 4 ft in the afternoon. A chance of showers in the morning then a chance of rain in the afternoon.
Tonight..S wind 20 to 30 kt. Wind waves 3 to 5 ft. Rain.
Thu..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain.
Thu night..S wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft.
Fri..S wind 20 to 30 kt easing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft.
Fri night..S wind 15 to 20 kt. Wind waves 2 to 3 ft.
Sat..SE wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..SE wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 920 Am Pst Wed Dec 12 2018
Synopsis for the northern and central washington coastal and inland waters..Strong frontal systems will arrive Wednesday night, Friday, and toward the end of the weekend. Small craft and gale force winds are likely at times through the week ahead.


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 121106
afdsew
area forecast discussion
national weather service seattle wa
306 am pst Wed dec 12 2018

Synopsis After a brief lull today, expect more rain and heavy
mountain snow tonight in to Thursday. Expect windy conditions
along the coast and north interior. Another wet system will reach
the area Friday night, then a break on Saturday. Additional
fronts will affect the area early next week keeping the pattern
active.

Short term Heavy snow showers continue this morning in the
cascades, especially in king and snohomish counties due to a
strong puget sound convergence zone. Models show the pscz
persisting into the morning hours. After a brief break this
afternoon, another round of heavy rain and mountain snow is
expected tonight as our next system moves in. We'll see another
1-3 feet of new snow across the west slopes of the cascades -
winter storm warnings are in effect. The highest amounts will be
at the volcanoes. Snoqualmie pass may only see 6 inches but could
see a foot at stevens pass. Snow levels will rise Thursday
afternoon with a warm front for mainly rain at the passes.

In addition, it'll be windy tonight and Thursday, mainly along the
coast and in the north interior. Expect south winds of 25-35 mph
with gusts to 50 mph - a wind advisory is in effect.

The models have changed their tune on Friday. It seems our next
frontal system, at least according to the ECMWF and canadian,
will stall offshore. So we'll see a brief lull in this period.

Then more rain and mountain snow as we move into Friday night. The
snowpack will keep piling up with snow levels around 2000 feet.

A ridge will bring another break in the action on Saturday.

Temperatures are close to normal through the period. 33

Long term The weather pattern will remain active through early
next week due to strong, moist SW flow over the pac nw. This
means more rain and mountain snow through the period. The ecmwf
hints at a break late next week but for now will lean toward
persistence. 33

Aviation Showers continue to move onshore over western
washington early this morning in post-frontal westerly flow
aloft. The air mass remains fairly moist and somewhat unstable.

A convergence zone persists over eastern king county this
morning, but should gradually diminish later this morning as low
level onshore flow weakens and gradients begin to reverse in advance
of the next frontal system approaching the offshore waters.

Generally,VFR conditions are expected through the morning across
most of the region with a few showers.

High and mid level moisture will begin to thicken again by 18z.

Rain will develop along the coast by mid afternoon as another warm
front lifts northward over the offshore waters. MVFR conditions in
rain expected along the coast by 21z... Spreading into the puget
sound area by mid-evening. Gusty southerly surface winds
will rise once again this evening ahead of the next front. Low level
wind shear becomes a possibility after 03z this evening with 2000
foot winds of 40 to 45 knots possible.

Ksea... MainlyVFR expected through the morning with flow aloft
favoring some rain shadowing by the olympics and convergence zone
activity remaining north of the terminal. MVFR conditions in rain
developing near or after 00z and persisting well into Thursday.

Surface winds s-sw 8-14 knots though early afternoon... Becoming
southerly 15 gusting 20-25 knots tonight. 27

Marine Cold front exiting the area. Small craft and gale
force westerlies remain in its wake early this morning. Winds will
briefly subside a bit today in between storms but that will be short-
lived. Next system approaches the coast this afternoon and moves
inland tonight into Thursday. Winds will again pick up this
afternoon evening with another round of small craft advisories and
gale warnings. Additional systems past Thursday will impact the area
with small craft or gale conditions from time-to-time into next
week. Ceo

Hydrology The skokomish river in mason county crested in minor
flood stage overnight. The river will slowly recede today then
rise tonight and Thursday due to another round of heavy rain in
the basin. Moderate flooding is forecast with this next wave.

Other rivers flowing of the olympics will be monitored. Otherwise,
additional flooding is not expected. 33

Sew watches warnings advisories
Wa... Winter storm warning from 6 pm this evening to noon pst Thursday
for cascades of pierce and lewis counties-cascades of
whatcom and skagit counties.

Winter storm warning until noon pst Thursday for cascades of
snohomish and king counties.

Wind advisory from 6 pm this evening to noon pst Thursday for
admiralty inlet area-san juan county-western skagit county-
western whatcom county.

Wind advisory from 6 pm this evening to 6 am pst Thursday for
central coast-north coast.

Pz... Small craft advisory for rough bar until 4 pm pst Thursday for
grays harbor bar.

Gale warning until 7 am pst 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-west entrance u.S. Waters strait of
juan de fuca.

Gale warning until 7 am pst this morning for admiralty inlet-
central u.S. Waters strait of juan de fuca-east entrance
u.S. Waters strait of juan de fuca.

Gale warning from 4 pm this afternoon to 7 am pst Thursday for
admiralty inlet-east entrance u.S. Waters strait of juan de
fuca-northern inland waters including the san juan islands.

Small craft advisory until 4 am pst early this morning for
northern inland waters including the san juan islands.

Small craft advisory from 1 pm this afternoon to 7 am pst
Thursday for central u.S. Waters strait of juan de fuca.

Small craft advisory from 4 pm this afternoon to 7 am pst
Thursday for puget sound and hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 27 mi33 min SE 7 G 9.9 44°F 51°F1025.2 hPa
WPOW1 - West Point, WA 33 mi45 min SSE 15 G 17 44°F 1024.8 hPa (+3.9)38°F
46120 34 mi30 min NE 7.8 45°F 1023.9 hPa39°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi33 min SE 8 G 9.9
TCNW1 - 9446484 - Tacoma, WA 35 mi33 min 43°F 51°F1026.3 hPa

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 mi52 minS 510.00 miPartly Cloudy42°F37°F82%1025.8 hPa
Boeing Field - King County International Airport, WA24 mi52 minSSE 910.00 miOvercast41°F36°F82%1025.1 hPa

Wind History from RNT (wind in knots)
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1 day agoSE3S5S7S6S7S7S8SE3CalmE3SE3SE3E4CalmSE3S3SE5SE3SE3CalmS3SE4SE5SE5
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Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
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Wed -- 01:38 AM PST     0.06 feet Low Tide
Wed -- 07:48 AM PST     Sunrise
Wed -- 09:03 AM PST     11.72 feet High Tide
Wed -- 11:37 AM PST     Moonrise
Wed -- 03:05 PM PST     6.39 feet Low Tide
Wed -- 04:17 PM PST     Sunset
Wed -- 07:13 PM PST     8.28 feet High Tide
Wed -- 09:31 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.40.30.11.135.47.89.911.311.711.410.59.17.86.86.46.67.27.98.38.17.46.24.7

Tide / Current Tables for Seattle, Washington
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Seattle
Click for Map
Wed -- 01:27 AM PST     0.07 feet Low Tide
Wed -- 07:48 AM PST     Sunrise
Wed -- 09:02 AM PST     12.09 feet High Tide
Wed -- 11:37 AM PST     Moonrise
Wed -- 02:54 PM PST     6.73 feet Low Tide
Wed -- 04:17 PM PST     Sunset
Wed -- 07:12 PM PST     8.53 feet High Tide
Wed -- 09:31 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.20.21.43.45.88.310.311.612.111.710.79.37.976.777.68.28.58.37.56.24.6

Weather Map and Satellite Images
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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 (12,3,4,5)
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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.