Monday, November19, 2018 L-36.com


Marine Weather and Tides
Kent, 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 7:19AMSunset 4:30PM Monday November 19, 2018 4:04 PM PST (00:04 UTC) Moonrise 3:15PMMoonset 2:57AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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- 234 Pm Pst Mon Nov 19 2018
Tonight..S wind to 10 kt. Wind waves 1 ft or less. Patchy fog after midnight.
Tue..S wind 5 to 15 kt. Wind waves 2 ft or less. Patchy fog in the morning.
Tue night..S wind to 10 kt becoming sw after midnight. Wind waves 1 ft or less. A slight chance of rain after midnight.
Wed..S wind 5 to 15 kt. Wind waves 2 ft or less.
Wed night..S wind to 10 kt. Wind waves 1 ft or less.
Thu..S wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..S wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft.
Fri..S wind 5 to 15 kt becoming sw. Wind waves 2 ft or less.
Sat..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 234 Pm Pst Mon Nov 19 2018
Synopsis for the northern and central washington coastal and inland waters..Easterly flow through Tuesday as high pressure remains in control. A series of weather systems will move across the area late Tuesday through the end of the week with stronger onshore flow. Small craft advisory conditions are likely from time to time during this period with possible gales over the outer coastal waters Thursday into Friday.


7 Day Forecast for Marine Location Near Kent, WA
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location: 47.39, -122.26     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 192310
afdsew
area forecast discussion
national weather service seattle wa
330 pm pst Mon nov 19 2018

Synopsis High pressure will provide one more dry day across the
region Tuesday. Patchy fog or freezing fog will develop again later
tonight and Tuesday morning, with filtered sunshine in the afternoon
as high clouds increase. A series of low pressure systems will bring
wet weather Wednesday through Friday. After a break between systems
on Saturday, a weak front could bring some light rain Sunday.

Short term Ir satellite imagery shows the frontal system expected
to affect the area Wednesday currently out near 135w. The front
already shows signs of splitting, with cloud top brighting on the
southern extent where a secondary low is developing. This will tend
to slow the system a bit, with the ridge holding over the region
through Tuesday. Expect patchy fog or freezing fog again later
tonight and Tuesday morning. Otherwise sunshine will become filtered
sun by afternoon as high clouds increase over the area.

Models generally agree that light rain reach the coast early
Wednesday morning, then spread into the rest of western washington
by midday. This first front will be the weakest as it encounters the
ridge pushing eastward. QPF amounts look rather light, perhaps a
third of an inch over the mountains and about half that over the
lowlands. Snow levels may start just above pass levels but will fall
later Wednesday and Wednesday night down to at least 4000 feet. This
could allow a couple inches of snow to fall at some passes such as
stevens pass, and white pass. Ski areas may pick up several inches
but likely sub-advisory level.

The next system arrives for thanksgiving with steady rain picking up
during the afternoon. This front will have significantly more
moisture to work with and better lift, both dynamic and orographic.

Snow levels will fall, probably down to all mountain passes by
afternoon. Models still show a split flow pattern with the heaviest
precipitation again headed into ca and oregon. There is a strong
orographic push with onshore flow behind the front, and this would
be the likely be the period of heaviest snowfall. An advisory could
be necessary, but with the split flow and progressive push through
the region, snow amounts in the passes come up just short of
advisory level. It will become breezy with this system as well, but
gradients do not support strong or damaging winds. However,
visibility in the passes could be reduced with snowy pass conditions
at times.

Long term Snow levels will lower to around 2500 feet Thursday
night into Friday. Additional snow is likely, and accumulations in
the passes will probably cause travel difficulty through passes.

Those planning travel through mountain passes Wednesday through this
weekend should pay close attention to current forecasts and check on
road conditions by calling 5-1-1 before departing.

Snow will taper to snow showers in the mountains Friday afternoon
and night. Cool and showery conditions will affect the lowlands. The
puget sound convergence zone could become active as well. 1000-850mb
thickness values are not as low as might be expected with the -31c
cold pool overhead at 500mb. Low elevation snow does not appear to
be a concern at this time.

A break in precipitation is expected for Saturday. The GFS and ecmwf
both show this brief dry period. Both models also bring a weak front
into the area Saturday night and Sunday with a round of light rain
and mountain snow. Rain amounts should not be more than a couple
tenths at best given the progressive flow pattern.

The progressive flow pattern continues into early next week. This
makes timing individual fronts difficult. Wet weather is shown by
the ECMWF returning by late Monday and Monday night, while the gfs
holds rain off until Tuesday. Either way, expect unsettled weather
and timing can be refined as we get closer to the day 6-7 period.

Mercer

Aviation High pressure over the region will start to shift east
of Tuesday as a trough approaches. Light southerly flow aloft will
become moderate by Tuesday. Stable and dry conditions, except moist
near the surface with patchy fog later tonight and Tuesday morning.

Fog or freezing fog is most likely to develop over parts of the
southwest interior and south puget sound. Fog will lift by afternoon
as high clouds increase. Deeper moisture and rain will reach the
coast late Tuesday night or early Wednesday morning.

Ksea... Northwest wind 5 to 10 kt becoming northeast 2-4 kt after
04z.VFR conditions through Tuesday, except a chance of ifr fog most
likely between 10-16z. Any fog should lift by noon as high clouds
increase. Dtm

Marine high pressure will remain in control with mainly easterly
flow through Tuesday. A series of low pressure systems will move
across the area from late Tuesday night through the end of the week.

Stronger onshore flow is likely with periods of small craft advisory
conditions from time to time. It's possible there could be a period
of gales over the outer coastal waters Thursday into Friday. Ceo

Hydrology A pattern change will get underway late Tuesday with a
series of low pressure systems moving across the area Wednesday into
the end of the week. Snow levels will be lowering with these
systems, down to around 3000 feet by Friday. At this time, rainfall
amounts do not look high enough to cause any river flooding but
river levels will be on the rise. Still some uncertainty with the
model precipitation forecasts so will continue to monitor. Ceo

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 11 mi34 min WSW 2.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 12 mi34 min 49°F 53°F1018.8 hPa
EBSW1 - 9447130 - Seattle, WA 15 mi34 min WNW 1 G 1.9 51°F 53°F1018.3 hPa
WPOW1 - West Point, WA 21 mi64 min NE 4.1 G 5.1 48°F 1018.7 hPa (-1.8)38°F
46121 26 mi29 min 48°F 1018.2 hPa45°F
46120 27 mi30 min NE 1.9 50°F 1017.5 hPa41°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA4 mi71 minWNW 310.00 miA Few Clouds52°F42°F69%1019.2 hPa
Renton Municipal Airport, WA8 mi71 minNNW 410.00 miFair53°F39°F59%1018.9 hPa
Boeing Field - King County International Airport, WA10 mi71 minVar 310.00 miFair53°F37°F55%1018.4 hPa
Tacoma, Tacoma Narrows Airport, WA19 mi71 minSSE 410.00 miFair45°F41°F86%1018.7 hPa
Pierce County-Thun Field, WA20 mi69 minN 08.00 miFair54°F39°F58%1018.3 hPa
Tacoma / McChord Air Force Base, WA20 mi66 minN 04.00 miFair with Haze49°F45°F85%1019.2 hPa

Wind History from SEA (wind in knots)
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Last 24hrNW4N8N8N6N7N4N4N4CalmCalmCalmN3N3CalmN3N3CalmCalmW3W6W4W4W3Calm
1 day agoN11N17N13N13NE11N12N8N9NE8N7N9NE11NE85N9N7N7N7N4N3CalmN4N4W6
2 days agoN10N11N10N12N14N12N14N9N9NE10NE10N11NE17N11N12N12N9N12N8N11N13N12N11NE14

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Mon -- 02:18 AM PST     8.84 feet High Tide
Mon -- 02:57 AM PST     Moonset
Mon -- 07:19 AM PST     Sunrise
Mon -- 07:46 AM PST     4.39 feet Low Tide
Mon -- 01:57 PM PST     11.52 feet High Tide
Mon -- 03:14 PM PST     Moonrise
Mon -- 04:29 PM PST     Sunset
Mon -- 08:49 PM PST     1.93 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.18.38.88.786.95.64.64.456.38.19.811.111.5119.87.95.73.62.31.92.64.1

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Mon -- 12:01 AM PST     -0.06 knots Slack
Mon -- 02:28 AM PST     -1.18 knots Max Ebb
Mon -- 02:58 AM PST     Moonset
Mon -- 05:37 AM PST     0.05 knots Slack
Mon -- 07:20 AM PST     Sunrise
Mon -- 08:06 AM PST     1.57 knots Max Flood
Mon -- 11:53 AM PST     -0.04 knots Slack
Mon -- 02:49 PM PST     -1.41 knots Max Ebb
Mon -- 03:15 PM PST     Moonrise
Mon -- 04:30 PM PST     Sunset
Mon -- 06:16 PM PST     0.00 knots Slack
Mon -- 08:44 PM PST     1.69 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-0.9-1.2-1.2-1-0.70.61.31.61.51.30.9-0.4-1.1-1.3-1.4-1.3-1.1-0.61.11.61.71.61.3

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 (19,4,5,8)
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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.