Saturday, January23, 2021
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Marine Weather and Tides
Marblemount, WA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:45AMSunset 4:54PM Friday January 22, 2021 11:05 PM PST (07:05 UTC) Moonrise 12:07PMMoonset 2:19AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 826 Pm Pst Fri Jan 22 2021
Tonight..N wind 10 to 20 kt becoming ne 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Sat..E wind 5 to 15 kt becoming S to 10 kt in the afternoon. Wind waves 2 ft or less.
Sat night..SE wind 10 to 20 kt rising to 15 to 25 kt after midnight. Wind waves 2 to 4 ft. A slight chance of rain in the evening then a chance of rain after midnight.
Sun..SE wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun night..S wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft.
Mon..SE wind to 10 kt. Wind waves 1 ft or less.
Mon night..Light wind becoming E to 10 kt after midnight. Wind waves less than 1 ft becoming 1 ft or less after midnight.
Tue..E wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..E wind to 10 kt. Wind waves 1 ft or less.
PZZ100 826 Pm Pst Fri Jan 22 2021
Synopsis for the northern and central washington coastal and inland waters..Southerly winds redevelop Saturday ahead of an approaching frontal system. This front will cross the waters Saturday night and Sunday with low pressure dissipating over the area on Monday. A second front will approach the area on Tuesday.


7 Day Forecast for Marine Location Near Marblemount, WA
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location: 48.54, -121.44     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 230456 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 856 PM PST Fri Jan 22 2021

UPDATE. Temperatures tonight are trending 5 to 10 degrees cooler than 24 hours ago as northerly wind continues to usher in drier air across the region. Overall, expect overnight lows to dip down into the upper 20s to low 30s across the area. With clear skies and guidance still hinting at a shallow layer of moisture across portions of the southern Sound, could see some areas of freezing fog develop overnight. Will need to keep an eye on this over the next several hours. A few tweaks were made to forecast in the near-term to account for current trends. The previous discussion follows below, with updates made to the aviation and marine sections. 14

SYNOPSIS. Dry and cold conditions expected tonight into Saturday. Wet weather will return to the region Sunday through at least mid next week, with lower snow levels in place. Chances for some lowland snow increase by the middle of next week.

SHORT TERM /TONIGHT THROUGH MONDAY/. A chilly night lies ahead with mostly clear skies apart from some possible freezing fog over parts of the Southwest Interior. Clouds will gradually increase throughout the day on Saturday ahead of an upper trough sliding southward down the British Columbia. Precipitation will spread inland early Sunday morning. For most areas below 1000 feet, it will be in the form of rain. It could, however, briefly begin as snow over portions of Whatcom County where lower dew points and a slow trickle of Fraser outflow could bring the snow level down closer to sea level.

The trough moves onshore Sunday afternoon and evening with snow levels remaining quite low. From Snohomish County southward, there should be enough low level southerly flow to preclude lowland snow accumulation. Whatcom and perhaps Skagit counties could be the exception with perhaps a slushy inch or two of accumulation possible above 500 feet. The upper trough remains centered over the region on Monday with light snow showers remaining possible over the North Interior through the morning hours. Otherwise, Monday will be mostly cloudy with scattered showers and temperatures remaining a bit below normal.

LONG TERM /TUESDAY THROUGH FRIDAY/. Apart from some shower activity over the Olympic Peninsula, much of Tuesday is trending mostly dry. The next in a series of troughs will approach the region by late Tuesday. At this point in time, models are generally favorable with low level thicknesses and temperatures aloft cool enough for possible snow down to near sea level Tuesday night and early Wednesday. As is often the case, the challenge will be with the trajectory of the associated surface low and the amount of moisture available. At least 2/3 of the ensemble members of the GFS/ECMWF produce a fraction of an inch for the Seattle area with 1-3 inches for portions of Snohomish County northward. So, confidence is increasing that there will be a possibility of accumulating lowland snow by midweek. It remains much too early for any significant amount of confidence in amounts.

Nonetheless, the below average temperatures and unsettled conditions will be with us throughout the week ahead. Monitor the forecasts closely as wintry conditions could impact travel next week. 27

AVIATION. Mostly clear skies continuing this evening with light northerly flow. Given the decreasing winds and clear skies, efficient radiational cooling is likely and there may be enough moisture for patchy fog overnight, especially in the typically fog- prone locations. Otherwise, mid-level clouds begin to increase by midday Saturday through the afternoon ahead of the next approaching front. Northerly winds ease overnight, with light winds overnight. Southerly winds increase Saturday ahead of the previously mentioned approaching front.

KSEA . VFR conditions expected tonight with light northerly winds and generally clear skies. May see some patchy fog try to develop west and south of the terminal early Saturday, but remains a low probability (less than 10%) of development at/in vicinity of terminal. Expect a return of lower VFR ceilings to arrive late Saturday afternoon ahead of the next front with MVFR conditions possible by Saturday evening. Light northeast winds likely become southerly after 20z Saturday. Cullen

MARINE. Winds remain below advisory thresholds overnight through Saturday morning. Southerly winds will redevelop over the waters later Saturday ahead of the next front. Expect a return of advisory strength winds Saturday night, with the potential for gales early Sunday morning. Meanwhile, seas will build over the coastal waters, possibly reaching 15 to 20 ft Sunday. Winds and seas ease a bit Monday, but another front may follow for another round of stronger wind and larger seas. Cullen

HYDROLOGY. No river flooding expected over the next 7 days as total QPF is expected to remain light with low snow levels.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . None.

www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PBFW1 - Padilla Bay Reserve, WA 55 mi95 min Calm 29°F 1020 hPa28°F
CHYW1 - 9449424 - Cherry Point, WA 73 mi47 min 1019.9 hPa
PTWW1 - 9444900 - Port Townsend, WA 76 mi47 min NW 2.9 G 6 40°F 47°F1020.7 hPa

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arlington Municipal Airport, WA46 mi9 minN 010.00 miFair25°F24°F96%1020.9 hPa

Link to 5 minute data for KAWO

Wind History from AWO (wind in knots)
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Last 24hrN4N5N4CalmN4NW4NW3NE3CalmN3NW3NW4NW7W9NW10NW10NW9NW6NW5CalmCalmN3N4Calm
1 day agoCalmCalmNW3CalmN4CalmCalmCalmCalmCalmCalmN3N4CalmN3NW5NW6NW5NW5NW4CalmCalmCalmCalm
2 days agoCalmCalmN4N3CalmW3CalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalmCalmCalmE3N3CalmCalm

Tide / Current Tables for Stanwood, Washington
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Stanwood
Click for Map
Sat -- 02:58 AM PST     5.82 feet High Tide
Sat -- 03:28 AM PST     Moonset
Sat -- 07:47 AM PST     Sunrise
Sat -- 08:59 AM PST     2.25 feet Low Tide
Sat -- 12:18 PM PST     6.36 feet High Tide
Sat -- 12:37 PM PST     Moonrise
Sat -- 04:55 PM PST     Sunset
Sat -- 09:53 PM PST     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.44.75.55.85.64.943.12.52.334.86.26.365.44.73.72.71.70.90.40.20.8

Tide / Current Tables for Marysville, Quilceda Creek, Washington
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Marysville
Click for Map
Sat -- 02:44 AM PST     8.91 feet High Tide
Sat -- 03:26 AM PST     Moonset
Sat -- 07:14 AM PST     6.91 feet Low Tide
Sat -- 07:46 AM PST     Sunrise
Sat -- 12:04 PM PST     9.74 feet High Tide
Sat -- 12:37 PM PST     Moonrise
Sat -- 04:55 PM PST     Sunset
Sat -- 08:08 PM PST     0.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.18.28.88.98.57.97.26.97.17.68.59.39.79.58.77.55.94.12.41.20.71.12.23.9

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

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Ground Weather Radar Station




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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.