Sunday, March29, 2020
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Marine Weather and Tides
Vashon, 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 6:52AMSunset 7:35PM Saturday March 28, 2020 11:38 PM PDT (06:38 UTC) Moonrise 8:06AMMoonset 11:09PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 829 Pm Pdt Sat Mar 28 2020
.small craft advisory in effect through Sunday morning...
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain likely in the evening then rain after midnight.
Sun..SW wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain likely in the morning then a chance of rain in the afternoon.
Sun night..SW wind 15 to 25 kt becoming S 20 to 30 kt after midnight. Wind waves 3 to 5 ft. A chance of rain in the evening then rain likely after midnight.
Mon..SW wind 20 to 30 kt easing to 10 to 20 kt in the afternoon. Wind waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon.
Mon night..SW wind 10 to 20 kt becoming S 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Tue..S wind to 10 kt. Wind waves 1 ft or less.
Tue night..SW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Wed..Light wind. Wind waves less than 1 ft.
Thu..Light wind. Wind waves less than 1 ft.
PZZ100 829 Pm Pdt Sat Mar 28 2020
Synopsis for the northern and central washington coastal and inland waters..Another weak front crosses the waters tonight, followed by a much stronger system late Sunday. The Sunday night system will likely bring gales to at least the coastal waters and portions of the inland waters. Seas remain elevated through mid- week with an arriving westerly swell, but winds will ease with high pressure returning to the region.


7 Day Forecast for Marine Location Near Vashon, WA
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location: 47.4, -122.46     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 290330 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 830 PM PDT Sat Mar 28 2020

UPDATE. Light rain this evening across portions of Western Washington as a weak front moves through the area tonight into early Sunday. Snow levels around 4000-4500 feet tonight and drop to 3500 feet by late Sunday morning. A few showers around Sunday afternoon, though most places generally drier. A strong system will move through Sunday night into Monday for mountain snow and locally windy conditions.

SYNOPSIS. A weak front will arrive tonight and Sunday. A strong cold front will reach Western Washington around daybreak Monday. The snow level in the mountains will fall as a rather cool air mass drops over the region Monday and Tuesday.

SHORT TERM /TONIGHT THROUGH TUESDAY/. A weak front will bring some areas of light rain to the area tonight and Sunday--not a lot of change from today. Colder air will drop down over the northeast Pacific for the first part of the week with a significant upper trough. A quick cold front around daybreak Monday will be followed by a cool showery air mass. It will be blustery as well at times, mainly with the front Monday morning. The snow level will fall below the passes with wintry travel at times in the mountains. The unstable air might give the area a few tstms and, for now, that is in the forecast for Monday afternoon and again Tuesday afternoon.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. A cool air mass will linger into Wednesday but shower activity should be decreasing. Upper ridging for the latter part of the week will allow temps to warm into the end of the week. It is not clear whether it will be dry and there are some low pops in the forecast. The 12z GFS is actually quite wet Thursday night and Friday and the ECMWF has a frontal system arriving for Friday night and Saturday, so we may yet see the forecast trend toward rainy weather in the extended.

AVIATION. Southwesterly flow aloft as an upper level trough moves through. The weak front will move through the area tonight with light rain at times. MVFR cigs for most through Sunday afternoon with IFR in spots around the Puget Sound. Southerly surface winds 7 to 14 knots into Sunday with stronger southerly winds Sunday night into Monday morning as a system moves through.

KSEA . MVFR into Sunday afternoon with light rain at times, especially tonight into early Sunday morning. Southerly winds 7 to 14 knots with gusts to 20 knots possible.

MARINE. A weak front crossing the waters through tonight for Small Craft Advisories for most waters. A stronger system will move through late Sunday into early Monday with increasing southerly winds Sunday evening. Gales possible with this system for the coast, eastern Strait of Juan de Fuca, and northern inland waters. Small craft advisories elsewhere. Winds will subside late Monday into Tuesday with steep seas into mid-week over the coastal waters and lighter winds. JD

HYDROLOGY. River flooding is unlikely for the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Gale Watch from Sunday evening through late Sunday night 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.

Small Craft Advisory until 7 AM PDT Sunday 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.

Gale Watch from Sunday evening through Monday morning for East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until 3 AM PDT Sunday for East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until 11 AM PDT Sunday for Admiralty Inlet- Puget Sound and Hood Canal.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 9 mi51 min SE 6 G 8
TCNW1 - 9446484 - Tacoma, WA 10 mi51 min 50°F 48°F1012.1 hPa
WPOW1 - West Point, WA 18 mi39 min S 16 G 17 48°F 1010.9 hPa (-0.4)48°F
46120 25 mi32 min S 7.8 49°F 1009.9 hPa47°F
46125 36 mi38 min 50°F 1008.4 hPa46°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 mi46 minS 127.00 miLight Rain49°F45°F86%1011.8 hPa
Tacoma, Tacoma Narrows Airport, WA11 mi46 minS 1310.00 miLight Rain48°F45°F89%1011.7 hPa
Boeing Field - King County International Airport, WA12 mi46 minSSE 710.00 miLight Rain49°F45°F86%1011.1 hPa
Renton Municipal Airport, WA14 mi46 minS 77.00 miLight Rain49°F44°F83%1011.8 hPa
Tacoma / McChord Air Force Base, WA17 mi1.7 hrsS 1110.00 miLight Rain49°F45°F90%1012.3 hPa
Bremerton, Bremerton National Airport, WA17 mi43 minSSW 1010.00 miLight Rain47°F46°F97%1011.3 hPa
Fort Lewis / Gray U. S. Army Airfield, WA22 mi1.7 hrsSSE 910.00 miLight Drizzle49°F49°F100%1011.9 hPa
Pierce County-Thun Field, WA22 mi44 minVar 5 G 1110.00 miOvercast50°F44°F82%1011.8 hPa

Link to 5 minute data for KSEA

Wind History from SEA (wind in knots)
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Last 24hrS8S7S10S8S7S6S8S8SE9S8S12S8S11S11
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1 day agoS10S8S10S11S11S8S9S7S5S6S7S9S9S11S9S10S9S8S7S7S8S10S7S6
2 days agoSE6S5S7S7S8S7S9S11S11
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Tide / Current Tables for Burton, Quartermaster Hbr. (inside), Vashon I., Puget Sound, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Sun -- 12:05 AM PDT     0.04 knots Slack
Sun -- 12:09 AM PDT     Moonset
Sun -- 02:54 AM PDT     1.44 knots Max Flood
Sun -- 05:56 AM PDT     -0.00 knots Slack
Sun -- 06:53 AM PDT     Sunrise
Sun -- 09:27 AM PDT     -1.36 knots Max Ebb
Sun -- 09:35 AM PDT     Moonrise
Sun -- 12:02 PM PDT     0.00 knots Slack
Sun -- 03:21 PM PDT     1.70 knots Max Flood
Sun -- 07:03 PM PDT     -0.05 knots Slack
Sun -- 07:36 PM PDT     Sunset
Sun -- 10:06 PM PDT     -1.23 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.30.91.31.41.30.9-0.3-0.9-1.2-1.3-1.3-1.1-0.311.51.71.71.40.90.1-0.9-1.1-1.2-1.1

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 (2,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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weather_mapweather_map weather_map

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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.