Thursday, April9, 2020
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Marine Weather and Tides
Navy Yard City, WA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:31AMSunset 7:52PM Wednesday April 8, 2020 10:01 PM PDT (05:01 UTC) Moonrise 7:56PMMoonset 6:19AM Illumination 98% 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- 823 Pm Pdt Wed Apr 8 2020
Tonight..N wind 5 to 15 kt easing to 10 kt after midnight. Wind waves 2 ft or less.
Thu..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..N wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Fri..Light wind. Wind waves less than 1 ft.
Fri night..Variable wind to 10 kt becoming sw after midnight. Wind waves 1 ft or less.
Sat..Light wind becoming N 5 to 15 kt in the afternoon. Wind waves less than 1 ft becoming 2 ft or less in the afternoon.
Sat night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sun..Light wind becoming N to 10 kt. Wind waves less than 1 ft becoming 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
PZZ100 823 Pm Pdt Wed Apr 8 2020
Synopsis for the northern and central washington coastal and inland waters..Northerly flow will prevail across western washington tonight. Highest winds will be over the coastal waters and a small craft advisory is in effect. Onshore flow will return on Thursday and Friday. The flow will turn offshore again over the weekend.


7 Day Forecast for Marine Location Near Navy Yard City CDP, WA
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location: 47.55, -122.65     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 090341 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 841 PM PDT Wed Apr 8 2020

SYNOPSIS. Upper level ridging will remain the dominant weather feature across Western Washington over the next few days, keeping the region dry. Chances of rain will increase over the weekend as a weak system skirts past the area.

SHORT TERM /TONIGHT THROUGH SATURDAY/. Dry and stable weather will continue overnight due to high pressure and offshore flow. Expect lows mostly in the 40s. May see patchy fog in the south sound but it will be shallow and burn off by late morning. 33

Previous discussion . Thursday continues to look like the warmest day of the week, with highs reaching into the low to mid 60s for a good portion of the lowlands. However, could start to see some more mid to high level clouds move over the region as an upper level low makes its way from the Gulf of Alaska down into British Columbia. Given the persistence of the ridge and the system weakening as it sinks southward, Western Washington will remain dry.

Morning clouds are on tap for Friday. As low level flow transitions more onshore and gradients strengthen somewhat, stratus could make its way into portions of the Sound. A weak system will then move south from Canada, brushing the eastern portion of the CWA late in the day. Cannot rule out a few showers, though expect most of these to remain confined to higher terrain. Saturday will see slightly greater chances of precipitation as this system sinks further southward and brushes past the area, however amounts continue to look light-with many areas even remaining dry.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Previous discussion . Sunday and Monday look to remain dry across the region as the upper level ridge builds back across the northeastern Pacific. Deterministic models hint that a weak shortwave could traverse through the region Tuesday into Wednesday, however models continue to have difficultly resolving the feature at this time. Ensembles trend towards a drier long term with upper level ridging persistent across the area, deflecting any systems riding the ridge further to the east. Will need to stay tuned to further runs over the coming days. SB

AVIATION. High pressure and offshore flow will bring dry and stable weather to western WA tonight. The flow aloft is northerly with N/NE winds at the surface. Patchy morning fog or low clouds may develop in the south sound overnight, otherwise VFR conditions expected. Dry weather will continue on Thursday. 33

KSEA . VFR tonight with N/NE wind 5-10 kt. 33

MARINE. Northerly flow will prevail across western Washington tonight. Highest winds will be over the Coastal Waters and a Small Craft Advisory is in effect. Winds will ease early Thursday morning. Onshore flow will return on Thursday and Friday with possible Small Craft Advisory winds through the Strait of Juan de Fuca, especially during the late afternoon and evening hours. The flow will turn offshore again over the weekend. 33

HYDROLOGY. No river flooding expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 5 AM PDT Thursday for 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.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 14 mi61 min N 7 G 7 50°F 1023.9 hPa (-0.0)44°F
46121 19 mi27 min 1.9 53°F 1023.4 hPa42°F
46120 20 mi26 min ENE 1.9 51°F 1023 hPa37°F
TCMW1 - 9446482 - Tacoma Met, WA 23 mi43 min NNE 6 G 12
TCNW1 - 9446484 - Tacoma, WA 23 mi43 min 55°F 49°F1023.8 hPa
46125 25 mi25 min 50°F 1023.3 hPa38°F
PTWW1 - 9444900 - Port Townsend, WA 39 mi43 min W 5.1 G 8.9 53°F 48°F1024.6 hPa

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, WA8 mi65 minENE 410.00 miFair49°F36°F61%1024 hPa
Boeing Field - King County International Airport, WA19 mi68 minNW 310.00 miFair53°F37°F57%1023.4 hPa
Seattle, Seattle-Tacoma International Airport, WA20 mi68 minN 810.00 miA Few Clouds53°F36°F52%1024.1 hPa
Tacoma, Tacoma Narrows Airport, WA20 mi68 minNNE 610.00 miFair51°F36°F56%1023.5 hPa
Renton Municipal Airport, WA23 mi68 minNNW 510.00 miFair51°F41°F69%1023.8 hPa

Link to 5 minute data for KPWT

Wind History from PWT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmNE9NE9E6NE6E6E5NE9NE12
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1 day agoE4CalmSE3SE3CalmCalmCalmCalmSE3CalmCalmCalmNE5SE5NE4E4W5SW5W3CalmNE5NE5CalmCalm
2 days agoNE9NE10NE10NE6NE5CalmCalmCalmCalmCalmCalmN3E5E543E6SW7SW8SW74N5S3E3

Tide / Current Tables for Bremerton, Washington
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Bremerton
Click for Map
Thu -- 12:26 AM PDT     2.57 feet Low Tide
Thu -- 06:19 AM PDT     12.58 feet High Tide
Thu -- 06:32 AM PDT     Sunrise
Thu -- 07:45 AM PDT     Moonset
Thu -- 12:58 PM PDT     -0.77 feet Low Tide
Thu -- 07:29 PM PDT     12.05 feet High Tide
Thu -- 07:52 PM PDT     Sunset
Thu -- 10:19 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.72.84.26.69.211.412.512.310.88.35.22.20-0.80.12.35.28.210.611.911.910.88.96.6

Tide / Current Tables for Port Washington Narrows, North Entrance of, Washington Current
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Port Washington Narrows
Click for Map
Thu -- 12:52 AM PDT     0.00 knots Slack
Thu -- 04:13 AM PDT     3.00 knots Max Flood
Thu -- 06:32 AM PDT     Sunrise
Thu -- 07:34 AM PDT     -0.01 knots Slack
Thu -- 07:45 AM PDT     Moonset
Thu -- 11:22 AM PDT     -3.18 knots Max Ebb
Thu -- 01:15 PM PDT     0.01 knots Slack
Thu -- 04:56 PM PDT     4.14 knots Max Flood
Thu -- 07:52 PM PDT     Sunset
Thu -- 08:51 PM PDT     -0.00 knots Slack
Thu -- 10:19 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.80.21.52.532.82.10.8-0.5-1.7-2.6-3.1-2.8-0.71.32.83.84.13.82.81.4-0.2-1.2-2

Weather Map
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wmap_P
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (1,6,7,8)
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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 numerous 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.