Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Federal Way, 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 7:03AMSunset 5:41PM Wednesday February 20, 2019 7:53 AM PST (15:53 UTC) Moonrise 7:20PMMoonset 8:02AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 245 Am Pst Wed Feb 20 2019
Today..NW wind 10 to 20 kt becoming N 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft. Showers likely in the morning then a chance of showers in the afternoon.
Tonight..N wind 5 to 15 kt becoming 10 to 20 kt after midnight. Wind waves 1 to 3 ft. A slight chance of showers in the evening.
Thu..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..Light wind becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less.
Fri..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri night..SW wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..NE wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 245 Am Pst Wed Feb 20 2019
Synopsis for the northern and central washington coastal and inland waters..Northerly flow will develop today and then turn more northeasterly tonight and Thursday as high pressure moves over southern british columbia. A frontal system will reach the area on Friday. Northeasterly offshore flow will develop over the weekend.


7 Day Forecast for Marine Location Near Federal Way, WA
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location: 47.33, -122.34     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 201204
afdsew
area forecast discussion
national weather service seattle wa
404 am pst Wed feb 20 2019

Synopsis A cool upper level trough will remain over the area
today keeping showers in the forecast. Dry northerly flow aloft
developing tonight and continuing into Thursday. The next frontal
system will arrive from the northwest on Friday. Another cool
upper level trough will follow the front for the weekend into the
early part of next week. Low snow levels will continue through
the period.

Short term today through Friday Satellite imagery shows
the front that moved through the area Tuesday well to the south
and east. Doppler radar shows convergence zone extending from
about port angeles down to mount rainier with widely scattered
showers elsewhere. Since noon yesterday paradise on mount rainier
has received about 20 inches of snow. Skies remain mostly cloudy
over most of the area with some clearing along the north coast.

Temperatures at 3 am 11z were in the mid and upper 30s.

Convergence zone will slowly sag south and dissipate this
morning. Snow levels remain in the 500-1000 foot range this
morning but the precipitation rates are not strong enough in the
convergence zone to lower the snow levels any further. Outside of
the convergence zone cool upper level trough moving into the area
keeping a chance of showers in the forecast for the lowlands
today. Showers more common in the mountains but the flow aloft is
weakening rapidly which will result in not very impressive
precipitation amounts in the mountains. Will let the advisory and
warnings for the cascades expire at 6 am this morning. For the
remainder of the day only a couple more inches of snow expected.

Sounding like a broken record, highs today will be well below
normal, mostly in the lower 40s.

Upper level trough remaining over the area tonight with drier
northerly flow aloft increasing after midnight. With the trough
hanging around will have to keep a chance of showers in the
forecast for the evening hours. Snow levels will be lowering as
cooler air moves into the area so there is a chance that the
showers could be rain and snow mixed or briefly in the form of
snow. No significant accumulations expected. Lows tonight will be
in the mid 20s to mid 30s.

A little break in the action on Thursday with dry northerly flow
aloft over the area. Cloud cover decreasing Wednesday night and
with light surface gradients patchy morning freezing fog
developing with the best chances over the southwest interior. Even
with some sunshine Thursday afternoon highs will only be in the
upper 30s to mid 40s.

Temporary upper level ridge moving through the area Thursday
night ahead of the next frontal system moving down the british
columbia coast. Models in better agreement on the 00z run going
more with the slower timing of previous ECMWF runs. The slower
timing will keep the chance of precipitation confined to the north
coast early Friday morning. Lows will be in the mid 20s to mid
30s.

Slower timing of the front keeping most of the moisture out of the
interior Friday morning. Snow levels will be low, 500 feet or
less, so if the precipitation does arrive a little earlier it will
be in the form of snow initially. As with the previous system
increasing onshore flow ahead of the system will lift the snow
levels up to around 1000 feet in the afternoon. Highs on Friday
will be in the lower to mid 40s.

Long term Saturday through Tuesday Extended models in good
agreement with the front moving through the area Friday night
into Saturday morning with another post frontal convergence zone
possible. This feature has the potential to lower the snow levels
back down to 500 feet or less. Cool upper level trough settling
over the area for the weekend into Monday. With the trough in the
area will have to keep at least a chance of showers in the
forecast. Snow levels will remain low generally 1000 feet or less.

Any showers that occur in the late night and early morning hours
could result in some small snow accumulations especially on the
higher hills.

Model solutions very inconsistent on Tuesday with the ecmwf
lifting a warm front up from the south into the area. The gfs
keeps this feature well south of the area. With the lack of
consistency in the models will go with chance pops on Tuesday.

Highs will remain well below normal through the period with a
chance for some warming on Tuesday. Felton

Aviation Northwest flow aloft will become northerly today as an
upper trough axis shifts east of the cascades. The air mass is moist
and somewhat unstable this morning. A convergence zone across the
southern part of puget sound will gradually dissipate later this
morning as it moves into the cascades. Low level northerly flow will
increase this afternoon. This combined with dry northerly flow aloft
will gradually erode widespread ifr and low MVFR ceilings across the
region this morning. Ceilings will lift toVFR this afternoon and
scatter out this evening.

Ksea... Shower activity and low MVFR ceilings associated with the
remnants of the pscz will persist through mid morning then a trend
toward improvement will take place from 18z onward.VFR ceilings at
or above 5000 feet expected by around 22z... Then scattering out by
late evening. Surface winds light n-nw becoming northerly 7 to 11
knots this afternoon then light NE tonight. 27

Marine Small craft advisory strength northwesterly winds over
the coastal waters will gradually ease today and tonight in the
wake of a front. Increasing fraser outflow will bring a period of
small craft advisory strength northeasterly winds to the northern
inland waters and eastern half of the strait of juan de fuca
tonight and Thursday morning. There will also be 10-15 foot west
to northwest swell over the coastal waters today and tonight which
will subside on Thursday.

A frontal system will drop down from the northwest on Friday with
northeasterly offshore flow turning more southerly ahead of the
front Thursday night. Northeasterly offshore flow will develop
again next weekend as high pressure builds over the interior of
british columbia. Schneider

Hydrology River flooding is not expected for the next 7 days

Sew watches warnings advisories
Wa... Winter storm warning until 6 am pst early this morning for
cascades of pierce and lewis counties-cascades of snohomish
and king counties.

Winter weather advisory until 6 am pst early this morning for
cascades of whatcom and skagit counties.

Pz... Small craft advisory until 10 pm pst this evening for 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 for rough bar until 8 pm pst this evening
for grays harbor bar.

Small craft advisory until 4 pm pst this afternoon for coastal
waters from CAPE flattery to james island 10 to 60 nm.

Small craft advisory for hazardous seas until 6 am pst Thursday
for coastal waters from CAPE flattery to james island out
10 nm-coastal waters from james island to point grenville
out 10 nm-west entrance u.S. Waters strait of juan de fuca.

Small craft advisory until 10 am pst this morning for admiralty
inlet-coastal waters from point grenville to cape
shoalwater out 10 nm-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory for hazardous seas from 10 am this morning
to 6 am pst Thursday for coastal waters from point
grenville to CAPE shoalwater out 10 nm.

Small craft advisory from 4 pm this afternoon to noon pst
Thursday for northern inland waters including the san juan
islands.

Small craft advisory from midnight tonight to noon pst Thursday
for central 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 6 mi42 min SE 4.1 G 4.1
TCNW1 - 9446484 - Tacoma, WA 6 mi42 min 37°F 48°F1011.6 hPa
46121 21 mi41 min 39°F 1011.1 hPa36°F
WPOW1 - West Point, WA 23 mi54 min NE 8 G 9.9 39°F 1011.1 hPa (+0.0)34°F
46120 30 mi41 min 38°F 1010.2 hPa35°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, WA8 mi61 minE 510.00 miMostly Cloudy37°F34°F89%1011.3 hPa
Renton Municipal Airport, WA13 mi61 minN 07.00 miOvercast36°F33°F89%1011.5 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi61 minN 010.00 miOvercast36°F34°F93%1011.1 hPa
Boeing Field - King County International Airport, WA14 mi61 minN 010.00 miMostly Cloudy38°F33°F83%1011 hPa
Tacoma / McChord Air Force Base, WA14 mi1.9 hrsN 010.00 miOvercast35°F35°F100%1011.1 hPa
Pierce County-Thun Field, WA16 mi59 minN 010.00 miOvercast34°F33°F100%1010.5 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi1.9 hrsN 010.00 miOvercast37°F36°F100%1011.1 hPa

Wind History from SEA (wind in knots)
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Last 24hrSW6S7SW85S8SW7S12S8S11S13
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1 day agoSE7SE6S4S5S3SE4S8SW6SW5CalmNE3E3SE4SE4SE6SE6S5S7S5S6S7S3Calm4
2 days agoS3S3NW3CalmCalmN5N5N4N3N3CalmS3S4S3SE5SE3E4SE5SE5SE4SE6SE3SE4SE4

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Wed -- 05:55 AM PST     13.36 feet High Tide
Wed -- 07:06 AM PST     Sunrise
Wed -- 08:02 AM PST     Moonset
Wed -- 11:42 AM PST     4.66 feet Low Tide
Wed -- 05:02 PM PST     11.61 feet High Tide
Wed -- 05:40 PM PST     Sunset
Wed -- 07:19 PM PST     Moonrise
Wed -- 11:43 PM PST     -1.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-11.34.5810.912.813.412.7118.76.454.75.67.49.41111.6119.46.93.91.1-0.7

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Wed -- 03:16 AM PST     -0.08 knots Slack
Wed -- 06:02 AM PST     -1.56 knots Max Ebb
Wed -- 07:07 AM PST     Sunrise
Wed -- 08:02 AM PST     Moonset
Wed -- 09:16 AM PST     0.07 knots Slack
Wed -- 11:37 AM PST     1.80 knots Max Flood
Wed -- 03:04 PM PST     -0.00 knots Slack
Wed -- 05:41 PM PST     Sunset
Wed -- 06:08 PM PST     -1.61 knots Max Ebb
Wed -- 07:20 PM PST     Moonrise
Wed -- 09:07 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.11.81.40.6-1-1.4-1.6-1.5-1.2-0.61.21.71.81.61.10.2-1.1-1.5-1.6-1.5-1.2-0.51.32

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 (10,2,3,4)
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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.