Monday, December11, 2017 L-36.com


Marine Weather and Tides
Keyport, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:47AMSunset 4:20PM Sunday December 10, 2017 9:42 PM PST (05:42 UTC) Moonrise 12:00AMMoonset 1:00PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 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- 901 Pm Pst Sun Dec 10 2017
Tonight..Light wind. Wind waves less than 1 ft. Patchy fog in the evening then areas of fog after midnight.
Mon..Light wind becoming S to 10 kt in the afternoon. Wind waves 1 ft or less. Areas of fog in the morning.
Mon night..S wind to 10 kt. Wind waves 1 ft or less. Areas of fog after midnight.
Tue and Tue night..Light wind. Wind waves less than 1 ft.
Wed..N wind 10 kt or less. Wind waves 1 ft or less.
Wed night..Light wind. Wind waves less than 1 ft.
Thu..S wind 10 to 20 kt. Wind waves 3 ft or less.
Fri..S wind 15 to 25 kt. Wind waves 1 to 4 ft.
PZZ100 901 Pm Pst Sun Dec 10 2017
Synopsis for the northern and central washington coastal and inland waters..A 1042 mb high over eastern washington and lower pres offshore will result in moderate offshore flow through Monday evening. A dissipating front will brush the north coast on Monday night, causing easterly gradients to weaken. Light northerly offshore flow will prevail on Tue and Wed. Expect a cold or occluded front to move across the area late Thursday night or early Friday. This will cause the flow to become onshore and strengthen.

7 Day Forecast for Marine Location Near Keyport CDP, WA
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location: 47.7, -122.63     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 102308
afdsew
area forecast discussion
national weather service seattle wa
308 pm pst Sun dec 10 2017

Synopsis A strong upper ridge will maintain dry and stagnant
conditions across western washington through Wednesday. The ridge
will break down by Thursday with rain returning Thursday night
and Friday. Wet weather will continue through the weekend with
strong moist flow over the area.

Short term Fog was limited today due to dense cirrus clouds
that passed before sunrise. As a result, there was less
radiational cooling and therefore higher dew point depressions.

The visible satellite shows some patchy clouds or fog over hood
canal otherwise the rest of the region is sunny. Temperatures are
mainly in the 40s with 50s along the coast. Looks like
quillayute, kuil, hit 59 degrees which is a new daily record
high. Skies should remain clear tonight with fog reforming around
puget sound.

The dry conditions, light winds and poor mixing has lead to
stagnant conditions. This may result in deteriorating air
quality. An air stagnation advisory remains in effect for the
interior lowlands - burn bans are possible.

There's a slight change in the pattern on Monday when a shortwave
trough clips the NW portion of the ridge, slightly flattening the
heights over W wa. This features is dry but we could see a bit
more mixing with a weaker low level inversion. The strong ridge
will rebuild over the region Tuesday and Wednesday for similar
conditions... Aka dry. The biggest forecast challenge will again
be fog coverage and temperatures. 33

Long term It looks like Thursday will be our last dry day of
this stretch as the ridge will start to break down. We should see
rain returning by Thursday night or Friday as a trough moves in
from the west. The models have been waffling on the exact timing
of this system and it's now slightly slower compared to
yesterday's (faster) solutions. Moist west to northwest flow will
continue trough the weekend for more wet weather with snow in the
mountains. 33

Aviation A strong upper level ridge will remain over the
region for sly flow aloft. The low level flow will be light
offshore. Expect areas of lifr CIGS vsbys to develop over the
interior lowlands overnight, continuing thru at least Monday
morning.

Ksea... Still expectingVFR conditions to prevail through much of
tonight. A few hours of dense fog is anticipated Monday morning.

Light northerly winds will become light and variable Monday
afternoon.

Marine Lower pressure offshore with higher pressure inland
will result in light easterly or offshore flow through midweek.

Expect a cold or occluded front to move across the area late
Thursday night or early Friday. This will cause the flow to become
onshore and strengthen.

Hydrology River flooding is not expected for the next 7 days.

Sew watches warnings advisories
Wa... Air stagnation advisory until noon pst Monday for admiralty
inlet area-bellevue and vicinity-bremerton and vicinity-
east puget sound lowlands-eastern strait of juan de fuca-
everett and vicinity-hood canal area-seattle and vicinity-
southwest interior-tacoma area-western skagit county-
western whatcom county.

Pz... Small craft advisory until 2 am pst Monday 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 9 am pst Monday for coastal waters
from CAPE flattery to james island out 10 nm-coastal waters
from point grenville to CAPE shoalwater out 10 nm-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
WPOW1 - West Point, WA 11 mi43 min N 12 G 14 45°F 1027.1 hPa (-0.3)39°F
46120 13 mi37 min N 7.8 43°F 1026.6 hPa39°F
EBSW1 - 9447130 - Seattle, WA 17 mi43 min NNW 1.9 G 2.9 44°F 50°F1027.1 hPa
PTWW1 - 9444900 - Port Townsend, WA 29 mi43 min W 5.1 G 7 44°F 48°F1028 hPa (-0.3)
46121 29 mi37 min 5.8 39°F 1026.6 hPa38°F
TCMW1 - 9446482 - Tacoma Met, WA 31 mi43 min SSE 1.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 32 mi43 min 33°F 49°F1027.3 hPa (-0.0)
SISW1 - Smith Island, WA 44 mi43 min NE 1.9 G 2.9 44°F 1027.1 hPa (-0.5)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bremerton, Bremerton National Airport, WA17 mi47 minNE 1210.00 miFair41°F37°F89%1028.2 hPa
Boeing Field - King County International Airport, WA21 mi50 minN 010.00 miFair36°F30°F82%1026.8 hPa
Everett Snohomish County, WA24 mi50 minN 510.00 miFair40°F36°F86%1027.4 hPa

Wind History from PWT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmNE3CalmCalmCalmCalmCalmNE7NE8NE9NE7NE4NE5NE7E6NE6NE8NE12
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3S3CalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalm--CalmCalmCalmNE3CalmCalmN3CalmCalmCalmN4N4NE3CalmN3CalmCalmSW3CalmCalmCalm

Tide / Current Tables for Poulsbo, Liberty Bay, Washington
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Poulsbo
Click for Map
Mon -- 12:52 AM PST     Moonrise
Mon -- 04:41 AM PST     3.11 feet Low Tide
Mon -- 07:49 AM PST     Sunrise
Mon -- 11:47 AM PST     12.68 feet High Tide
Mon -- 01:26 PM PST     Moonset
Mon -- 04:18 PM PST     Sunset
Mon -- 06:38 PM PST     3.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.17.25.84.43.33.23.85.37.29.411.212.412.71210.58.36.14.33.33.23.856.57.7

Tide / Current Tables for West Point, Seattle, 0.3 miles W of, Washington Current
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West Point
Click for Map
Mon -- 12:52 AM PST     Moonrise
Mon -- 01:43 AM PST     -0.59 knots Max Ebb
Mon -- 05:02 AM PST     0.00 knots Slack
Mon -- 07:49 AM PST     Sunrise
Mon -- 08:06 AM PST     0.74 knots Max Flood
Mon -- 11:27 AM PST     -0.00 knots Slack
Mon -- 01:26 PM PST     Moonset
Mon -- 02:48 PM PST     -0.89 knots Max Ebb
Mon -- 04:18 PM PST     Sunset
Mon -- 06:59 PM PST     0.00 knots Slack
Mon -- 09:19 PM PST     0.45 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.5-0.6-0.5-0.3-00.40.60.70.70.50.2-0.2-0.6-0.8-0.9-0.8-0.6-0.300.30.40.40.3

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 (0,6,7,8)
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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.