Saturday, February17, 2018 L-36.com


Marine Weather and Tides
Kent, 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 7:07AMSunset 5:38PM Saturday February 17, 2018 6:57 PM PST (02:57 UTC) Moonrise 8:16AMMoonset 7:44PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 222 Pm Pst Sat Feb 17 2018
.gale warning in effect...
Tonight..SW wind 25 to 35 kt easing to 15 to 25 kt late then shifting to north. Wind waves 4 to 6 ft subsiding to 2 to 4 ft. A chance of showers.
Sun..N wind 20 to 30 kt. Wind waves 3 to 5 ft. A chance of showers.
Sun night..N wind 15 to 25 kt. Wind waves 2 to 4 ft. A slight chance of showers in the evening. A slight chance of snow showers after midnight.
Mon..N wind 15 to 25 kt easing to 10 to 20 kt in the afternoon. Wind waves 2 to 4 ft.
Mon night..N wind 5 to 15 kt becoming S after midnight. Wind waves 1 or 2 ft.
Tue and Tue night..S wind to 10 kt. Wind waves 1 ft or less.
Wed..S wind 5 to 15 kt. Wind waves 1 or 2 ft.
Thu..Variable wind 5 to 15 kt. Wind waves 1 or 2 ft.
PZZ100 222 Pm Pst Sat Feb 17 2018
Synopsis for the northern and central washington coastal and inland waters..Low pressure over the area will shift south as high pressure over british columbia pushes south toward the area. Fraser outflow winds will develop overnight. The cold northerly winds will ease Monday and pressure gradients will be light on Tuesday.

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 180005
afdsew
area forecast discussion
national weather service seattle wa
405 pm pst Sat feb 17 2018

Synopsis The low center which brought today's active weather
will exit east this evening. A modified arctic cold front will
move southward through western washington late tonight and early
Sunday, bringing the possibility of lowland snow followed by
strong north winds. Dry conditions are expected from late Sunday
through Tuesday with cold temperatures remaining in place. Another
system could slide in from the northwest around next Wednesday,
with light snow possible. More systems are possible on Friday and
Saturday, with light precipitation and low snow levels.

Short term Deepening 996 mb surface low is now over northeast
washington and exiting east. Therefore, strong westerly wind over
the forecast area will ever so slowly start to ease over the next
few hours. Heavy snow over the cascades will also ease, though a
puget sound convergence zone may keep stevens pass going strong
for a while longer. With today's heavy snow and strong wind, an
avalanche warning is also in effect for a few more hours in the
cascades.

In the wake of today's low center, a a continental polar air mass
will quickly spread south through interior b.C. And come pouring
out of the fraser later tonight. The bli-cywl gradient is forecast
to peak near -20 mb on Sunday morning, making this a strong
fraser outflow event. Strong north- northeast winds will ensue,
most notably near bellingham, the san juans, and around to
admiralty inlet. Other places will be breezy as well. The
windiness from the less common northerly direction will have
greater tree impacts than a similar south wind. A modified arctic
front will spread south and southwest through western washington
early Sunday morning, with localized frontal convergence and
orographic lift leading to some lowland snow accumulations. The
average forecast snowfall up and down the i-5 corridor will be
about 1 to 2 inches. However, all meso models show a distinct hole
in the snowfall pattern from poulsbo over to seattle, likely from
precip shadowing downwind of the olympics in northwest flow
aloft. So that is why the bremerton and seattle forecast zones are
excluded from the winter weather advisory over the lowlands. Some
local enhancement of snow is expected just away from the water
near port angeles due to north-northeast wind upsloping against
the north slope of the olympics, so the forecast there is for 2-4
inches of snow.

The front will be followed by the coldest air mass of this winter.

A hard freeze is expected areawide on Sunday night, with Monday
night likely being the coldest night of the upcoming cold spell.

At least the cold will come with drier weather. The last showers
will taper off over the cascades on Sunday night or Monday, with
dry weather expected Monday and Monday night.

The NAM and GFS keep Tuesday dry as well. The ECMWF tries to
develop a warm advection nose of precip over western washington on
tue. Since only two of the GFS ensemble's 20 members show precip
at hqm on Tuesday, have kept pops on the low side. If any precip
does occur on tue, it would still be cold enough for snow, even at
the coast. Haner

Long term A cool northwest flow pattern will continue from wed
through sat. A system diving down from the northwest on Wed could
very well spread light precip across western washington, with
light snowfall accumulations. A lull in precip is possible thu.

More precip with more weak shortwaves on Fri and sat. The 12z
ecmwf was colder than the 12z gfs, but the 18z GFS seems to be
coming around to a cooler solution. This would keep snow levels at
or below 1000 feet, a situation of the snow threat continuing on
higher lowland hills but less so at sea level. Haner

Aviation The front is moving inland and strong onshore flow and
a showery air mass will prevail this evening. A heavy band of pscz
showers were up over snohomish county this afternoon and a squall
moved through the strait. The showers overnight will turn over to
scattered snow showers as the air cools and then they will move
south around daybreak with clearing from the north.

Ksea... Scattered showers and blustery weather with SW winds will
give way to a north wind late tonight as the colder air pushes
south. Scattered snow showers around daybreak will probably give way
to pretty rapid clearing so much in the way of accumulation is not
expected in seattle--although a quick inch of snow in a shower is
possible.

Marine A 995mb low over southern b.C. Will sag south as the
cold high pressure system over b.C. Sags south. The modified arctic
front will be moving south through western washington before
daybreak Sunday--in fact cold fraser outflow northeasterly gales
should develop pretty quickly overnight--spreading down into the
port townsend to port angeles area well before daybreak. The switch
to northerly winds in puget sound will probably be around daybreak
for a raw brisk day. Gradients ease Monday and Monday night and by
Tuesday pressure gradients will be quite light.

Hydrology River flooding is not expected the next 7 days.

Sew watches warnings advisories
Wa... Winter weather advisory from 10 pm this evening to 9 am pst
Sunday for admiralty inlet area-bellevue and vicinity-
central coast-east puget sound lowlands-everett and
vicinity-hood canal area-lower chehalis valley area-north
coast-southwest interior-tacoma area-western skagit county.

Wind advisory until 8 pm pst this evening for bellevue and
vicinity-bremerton and vicinity-hood canal area-seattle and
vicinity-southwest interior-tacoma area.

Coastal flood advisory from 4 am to 8 am pst Sunday for
bremerton and vicinity-hood canal area-seattle and vicinity-
southwest interior-tacoma area.

Winter storm warning until 6 am pst Sunday for cascades of
pierce and lewis counties-cascades of snohomish and king
counties-cascades of whatcom and skagit counties.

Winter weather advisory from 8 pm this evening to 4 am pst
Sunday for san juan county-western whatcom county.

Wind advisory from midnight tonight to 6 pm pst Sunday for
western skagit county-western whatcom county.

Winter weather advisory until 10 am pst Sunday for olympics.

Wind advisory until 6 pm pst this evening for central coast-
north coast.

High wind warning until 9 pm pst this evening for admiralty
inlet area.

Wind advisory until 6 pm pst Sunday for san juan county.

Winter weather advisory from 10 pm this evening to 8 am pst
Sunday for eastern strait of juan de fuca-western strait of
juan de fuca.

Wind advisory until 9 pm pst this evening for eastern strait of
juan de fuca.

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

Gale warning until 4 pm pst Sunday for admiralty inlet-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-east entrance u.S. Waters
strait of juan de fuca-northern inland waters including the
san juan islands.

Gale warning until 3 am pst Sunday for central u.S. Waters
strait of juan de fuca-puget sound and hood canal-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
TCMW1 - 9446482 - Tacoma Met, WA 11 mi45 min SSW 11 G 16
TCNW1 - 9446484 - Tacoma, WA 12 mi45 min 45°F 48°F1003.2 hPa
EBSW1 - 9447130 - Seattle, WA 15 mi39 min SSW 13 G 20 44°F 47°F1001.5 hPa
WPOW1 - West Point, WA 21 mi57 min SSW 26 G 29 45°F 1001.1 hPa (-0.7)38°F
46121 26 mi39 min 45°F 1002.2 hPa39°F
46120 27 mi41 min WNW 18 45°F 1000.1 hPa40°F

Wind History for Tacoma MET, WA
(wind in knots)    EDIT      (on/off)   Help
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SW24
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA4 mi64 minSSW 12 G 2310.00 miOvercast44°F37°F76%1002.9 hPa
Renton Municipal Airport, WA8 mi64 minS 12 G 1910.00 miOvercast45°F37°F74%1002.7 hPa
Boeing Field - King County International Airport, WA10 mi64 minS 12 G 2210.00 miMostly Cloudy45°F37°F74%1001.9 hPa
Tacoma, Tacoma Narrows Airport, WA19 mi64 minSSW 10 G 2210.00 miMostly Cloudy43°F37°F80%1002.6 hPa
Pierce County-Thun Field, WA20 mi82 minSSW 8 G 1510.00 miOvercast43°F39°F87%1004.1 hPa
Tacoma / McChord Air Force Base, WA20 mi2 hrsSW 1310.00 miMostly Cloudy44°F41°F91%1003.9 hPa

Wind History from SEA (wind in knots)
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Last 24hrSW11SW8SW12
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----SW16
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1 day agoS8S9S8SW11SW11S11S11S10S9S10S13S14S15
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2 days agoS3SE4S3S4CalmE4S8SE7SE4S5CalmS3S4S3S6SE6S5SW6SW7SW10SW9SW6S10S8

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Sat -- 06:27 AM PST     12.37 feet High Tide
Sat -- 07:11 AM PST     Sunrise
Sat -- 08:16 AM PST     Moonrise
Sat -- 12:21 PM PST     4.74 feet Low Tide
Sat -- 05:36 PM PST     Sunset
Sat -- 05:38 PM PST     10.43 feet High Tide
Sat -- 07:44 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.21.43.66.49.111.212.312.211.29.67.55.84.8567.69.210.210.49.57.95.83.51.6

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Sat -- 12:05 AM PST     1.97 knots Max Flood
Sat -- 04:02 AM PST     -0.08 knots Slack
Sat -- 06:49 AM PST     -1.47 knots Max Ebb
Sat -- 07:11 AM PST     Sunrise
Sat -- 08:16 AM PST     Moonrise
Sat -- 10:03 AM PST     0.00 knots Slack
Sat -- 12:24 PM PST     1.65 knots Max Flood
Sat -- 03:50 PM PST     -0.00 knots Slack
Sat -- 05:37 PM PST     Sunset
Sat -- 06:52 PM PST     -1.47 knots Max Ebb
Sat -- 07:45 PM PST     Moonset
Sat -- 09:45 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.91.61.10.1-1.1-1.4-1.5-1.3-1-0.31.21.61.61.40.9-0.5-1.1-1.4-1.5-1.3-0.90.51.4

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 (21,6,7,8)
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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.