Sunday, April22, 2018 L-36.com


Marine Weather and Tides
White Center, WA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:03AMSunset 8:11PM Sunday April 22, 2018 11:20 AM PDT (18:20 UTC) Moonrise 10:50AMMoonset 1:28AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 830 Am Pdt Sun Apr 22 2018
Today..N wind to 10 kt rising to 5 to 15 kt in the afternoon. Wind waves 2 ft or less. Patchy fog in the morning.
Tonight..N wind 5 to 15 kt becoming to 10 kt after midnight. Wind waves 2 ft or less.
Mon..N wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Mon night..N wind 5 to 15 kt becoming to 10 kt after midnight. Wind waves 2 ft or less.
Tue..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Wed..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu..Light wind becoming variable to 10 kt. Wind waves less than 1 ft becoming 1 ft or less.
PZZ100 830 Am Pdt Sun Apr 22 2018
Synopsis for the northern and central washington coastal and inland waters..High pressure is centered over british columbia. Thermally induced low pressure will set up along the oregon and washington coasts and persist into Wednesday morning. The thermal low pressure will move inland on Thursday.

7 Day Forecast for Marine Location Near White Center, WA
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location: 47.56, -122.35     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 221602
afdsew
area forecast discussion
national weather service seattle wa
902 am pdt Sun apr 22 2018

Synopsis A weak upper trough over washington will move east
today, and clouds over western washington will give way to mostly
sunny skies. An upper ridge will build over the area tonight and
remain in place through Thursday for a stretch of sunny days and
the warmest weather since last september. A weak system will bring
a return to clouds and cooler weather Friday and Saturday.

Short term A weak upper trough is over the pacific northwest
this morning, with its trough axis along the cascades at this
time. The cloud cover directly associated with the trough has
moved east of the crest for the most part, but there are areas of
lower clouds over the forecast area -- one over the greater
seattle area and the other over the northwest interior and its
waters. Elsewhere skies are mainly sunny, with 9 am temperatures
in the 40s to lower 50s.

The trough will move across eastern washington this afternoon,
with dry northwest flow aloft over western washington ahead of the
upper ridge building offshore. The cloud cover mentioned above
should give way to sunny skies across the entire forecast area
within the next few hours. Highs today will be a couple degrees
above normal, in the upper 50s to mid 60s.

The upper ridge will continue building as it shifts inland tonight
through Tuesday, and the low level flow will turn offshore as a
thermally induced trough extends northward along the pacific
northwest coast. The 500 mb height will rise to around 5730
meters; the 850 mb temperature will rise to around +7c on Monday
and +11c on Tuesday. As we have been advertising for several days
now, this will set the stage for sunny warm days with highs well
into the 70s over much of the area. Mcdonnal

Long term Here is the long term section from the early morning
forecast discussion -- extended models in good agreement early on in the
extended with the upper level ridge remaining in place Wednesday
into Thursday with the low level offshore flow beginning to
weaken on Thursday. Model 850 mb temperatures peaking out in the
plus 14 to 16c range. Temperatures aloft this warm combined with
low level offshore flow and the april Sun having plenty of juice
brings up the possibility of lower 80s in the warmer locations
Wednesday and Thursday. Temperatures on the coast will cool a
little on Thursday from the 70s on Wednesday with weakening of the
offshore flow. Temperatures over the interior will mostly be in
the upper 60s to lower 80s both Wednesday and Thursday. Model
differences start to appear on Friday with the ECMWF a little
slower kicking the shortwave out of the upper level low off of
northern california which would keep the offshore flow pattern
intact for another day. The faster GFS solution has the low level
flow turning onshore later Thursday with the approach of the
shortwave. Current forecast more in line with the GFS and given
the rarity of 4 70 plus days in a row in seattle in april ( see
climate section below ) will stay with the cloudier cooler slight
chance of showers forecast for Friday and Saturday. Felton

Aviation There are several areas of morning clouds that should
break up and dissipate for the afternoon. An upper ridge will bring
dry and stable conditions once the morning clouds burn off. The
flow aloft is northwesterly.

Ksea... A patch of morning stratus is over the metro area--mainly
east of i-5 over king county. It should burn off by midday.

Marine Northerly flow will prevail today. Then tonight,
a thermally induced trough of low pressure will set up along the
oregon and washington coasts and persist into Wednesday morning.

This will lead to light northerly offshore flow. The trough will
move inland on Thursday, with a southerly surge along the coast
and the start of a marine push into the inland waters.

Climate It is a rarity to get 4 days or more in a row of 70
degree plus weather in seattle in april. In the 74 years of
records at sea-tac it has only happened 4 times ( 4 days in row 3
times and 5 days once ). The last time it happened was the record
crushing 5 day streak from april 17-21, 2016 that included 4 days
in a row in the 80's. The other 4 day streaks occurred on april
24-27, 1995, april 26-29, 1987 and april 27-30, 1976. Even getting
a streak of 3 days in a row of 70 degree plus weather in april in
seattle is rare with only 6 streaks of 3 days in a row since
records started in 1945. Felton

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 3 mi51 min WNW 1 G 1.9 50°F 48°F1030.2 hPa
WPOW1 - West Point, WA 8 mi81 min NNE 13 G 14 48°F 1030.1 hPa (+0.0)40°F
46120 14 mi49 min NW 7.8 47°F 1029.6 hPa41°F
TCMW1 - 9446482 - Tacoma Met, WA 20 mi51 min N 8 G 9.9
TCNW1 - 9446484 - Tacoma, WA 21 mi51 min 50°F 49°F1030.3 hPa
46121 28 mi55 min 49°F 1029.7 hPa39°F
PTWW1 - 9444900 - Port Townsend, WA 44 mi51 min W 5.1 G 11 50°F 48°F1031 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA3 mi28 minENE 810.00 miMostly Cloudy53°F39°F59%1029.8 hPa
Renton Municipal Airport, WA8 mi28 minNNW 410.00 miMostly Cloudy50°F41°F71%1030.3 hPa
Seattle, Seattle-Tacoma International Airport, WA9 mi28 minN 810.00 miOvercast50°F39°F66%1030.3 hPa
Bremerton, Bremerton National Airport, WA23 mi25 minVar 6 G 1510.00 miPartly Cloudy52°F37°F59%1031.3 hPa
Tacoma, Tacoma Narrows Airport, WA23 mi28 minNE 610.00 miMostly Cloudy48°F39°F71%1030 hPa
Everett Snohomish County, WA24 mi28 minNNW 810.00 miOvercast48°F39°F74%1030 hPa

Wind History from BFI (wind in knots)
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Last 24hrS7SW5SW11N3NE5SE4E54NE4CalmNE3334NE3CalmCalmCalmCalmCalm354E8
1 day ago45SW7SW9W11NW6W5W6SW3SW5SW6SW6S7S7S11
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2 days agoCalm363W7W6NW6NW5NW4CalmN3CalmCalmCalmCalmCalmCalmE3SE4SE8SE7SE5S45

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Sun -- 02:27 AM PDT     Moonset
Sun -- 05:06 AM PDT     6.32 feet Low Tide
Sun -- 06:07 AM PDT     Sunrise
Sun -- 09:44 AM PDT     9.08 feet High Tide
Sun -- 11:50 AM PDT     Moonrise
Sun -- 02:46 PM PDT     First Quarter
Sun -- 05:07 PM PDT     -0.36 feet Low Tide
Sun -- 08:08 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.810.197.76.76.36.67.38.28.99.18.57.35.63.71.80.3-0.40.11.53.668.210

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Sun -- 02:28 AM PDT     Moonset
Sun -- 02:34 AM PDT     -0.59 knots Max Ebb
Sun -- 06:07 AM PDT     Sunrise
Sun -- 06:36 AM PDT     0.00 knots Slack
Sun -- 07:29 AM PDT     0.12 knots Max Flood
Sun -- 09:34 AM PDT     -0.00 knots Slack
Sun -- 11:50 AM PDT     Moonrise
Sun -- 02:05 PM PDT     -0.85 knots Max Ebb
Sun -- 02:46 PM PDT     First Quarter
Sun -- 05:57 PM PDT     0.00 knots Slack
Sun -- 08:09 PM PDT     Sunset
Sun -- 08:32 PM PDT     0.69 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.4-0.6-0.6-0.5-0.3-0.10.10.10.1-0.1-0.3-0.6-0.8-0.8-0.8-0.6-0.300.40.60.70.60.4

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (14,3,4,5)
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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.