Saturday, March28, 2020
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Marine Weather and Tides
Snoqualmie, 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 6:51AMSunset 7:34PM Saturday March 28, 2020 4:32 PM PDT (23:32 UTC) Moonrise 8:03AMMoonset 11:07PM Illumination 24% 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- 251 Pm Pdt Sat Mar 28 2020
.small craft advisory in effect through late tonight...
Tonight..S wind 10 to 20 kt. Wind waves 1 to 3 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 251 Pm Pdt Sat Mar 28 2020
Synopsis for the northern and central washington coastal and inland waters..Another weak front crosses the waters this evening and 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 Snoqualmie, WA
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location: 47.53, -121.84     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 282122 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 222 PM PDT Sat Mar 28 2020

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. Mostly MVFR conditions across Western Washington this afternoon as an upper trough continues to advance toward the region and a moist, but generally stable air mass remains in place. Expect mostly MVFR ceilings through the period with local IFR possible at times as heavier areas of rain develop this evening and tonight. Southerly surface winds, breezy at times, will continue across the region into Sunday, with stronger southerly winds Sunday evening and night.

KSEA . High MVFR to low VFR ceilings likely continue through most of the period with rounds of rain. A weak system crosses tonight, with better chance of lower MVFR ceilings and rain, followed by a stronger front late Sunday. Winds remain predominantly southerly today, gusts increasing this afternoon/evening and more significantly late Sunday. Cullen

MARINE. Another weak impulse crosses the waters this evening, bringing another round of small craft advisory winds much of the coastal and inland waters. A brief lull in winds is expected much of Sunday before a stronger surge of southerly winds moves across the region late Sunday. However, guidance suggests steep seas of 6-8 feet at around 7 seconds. Have held off on extending the advisory due to these seas, but will need to monitor tonight. However, a gale watch has been issued for the coastal waters and northern inland waters/east entrance of the Strait for late Sunday into early Monday due to the strong winds with this next weather system. Winds subside behind the front, but seas will remain elevated over the coastal waters through the first portion of next week. Cullen



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 Admiralty Inlet- East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands-Puget Sound and Hood Canal.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 33 mi32 min S 16 G 19 52°F 1012.8 hPa (-1.9)46°F
46120 34 mi37 min S 9.7 53°F 1011.8 hPa44°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi44 min S 11 G 16
TCNW1 - 9446484 - Tacoma, WA 35 mi44 min 55°F 48°F1013.9 hPa
46125 49 mi35 min 52°F 1011.2 hPa45°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA20 mi39 minS 1110.00 miOvercast55°F41°F59%1013.5 hPa
Boeing Field - King County International Airport, WA24 mi39 minS 14 G 2210.00 miLight Rain55°F43°F64%1013.2 hPa

Link to 5 minute data for KRNT

Wind History from RNT (wind in knots)
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2 days agoN3N5CalmSE3SE3CalmCalmSE4S5CalmSE33CalmSE3CalmCalmS7S8S8S8S8S9S9
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Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Sat -- 02:11 AM PDT     4.41 feet Low Tide
Sat -- 06:54 AM PDT     Sunrise
Sat -- 07:40 AM PDT     10.12 feet High Tide
Sat -- 09:04 AM PDT     Moonrise
Sat -- 02:37 PM PDT     0.81 feet Low Tide
Sat -- 07:34 PM PDT     Sunset
Sat -- 09:13 PM PDT     9.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.354.44.75.97.48.99.910.19.47.9642.210.91.93.75.87.79.19.89.68.8

Tide / Current Tables for Seattle, Washington
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Seattle
Click for Map
Sat -- 02:00 AM PDT     4.64 feet Low Tide
Sat -- 06:54 AM PDT     Sunrise
Sat -- 07:39 AM PDT     10.44 feet High Tide
Sat -- 09:04 AM PDT     Moonrise
Sat -- 02:26 PM PDT     0.85 feet Low Tide
Sat -- 07:34 PM PDT     Sunset
Sat -- 09:12 PM PDT     10.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.35.14.65.16.37.99.310.210.49.6863.92112.246.18.19.510.19.89

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 (19,4,5,8)
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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.