Sunday, August9, 2020
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Marine Weather and Tides
Marietta-Alderwood, 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 5:54AMSunset 8:36PM Sunday August 9, 2020 12:35 AM PDT (07:35 UTC) Moonrise 10:23PMMoonset 11:10AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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- 809 Pm Pdt Sat Aug 8 2020
Tonight..SW wind 5 to 15 kt rising to 15 to 25 kt after midnight. Wind waves 1 to 3 ft.
Sun..NW wind 15 to 25 kt easing to 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Sun night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Mon..S wind 5 to 15 kt becoming W 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Mon night..W wind 10 to 20 kt. Wind waves 1 to 3 ft.
Tue..W wind 10 to 20 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft.
Tue night..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..SW wind to 10 kt. Wind waves 1 ft or less.
Thu..S wind to 10 kt becoming sw. Wind waves 1 ft or less.
PZZ100 809 Pm Pdt Sat Aug 8 2020
Synopsis for the northern and central washington coastal and inland waters..Weak high pressure will build over the area Sunday. Onshore flow will increase at times as a couple of weak weather systems reach the area next week.


7 Day Forecast for Marine Location Near Marietta-Alderwood, WA
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location: 48.76, -122.7     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 090342 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 842 PM PDT Sat Aug 8 2020

UPDATE. Skies continue to clear this evening as an upper level ridge starts to build back into the region. Will likely see some clouds develop along the coast again overnight, however expect a sunnier and warmer day across the region on Sunday. No major updates were needed to the forecast package this evening. The previous discussion follows, with updates made to the marine and aviation sections. 14

SYNOPSIS. Clearing skies and dry conditions this afternoon. Clear skies and warming temperatures will persist into Monday. Another weak system will bring cool temperatures Tuesday and Wednesday followed by some possible showers for the latter part of the week.

SHORT TERM /TODAY THROUGH TUESDAY/. Both satellite and a peek out the window shows clouds very gradually breaking up east of the Sound this afternoon while clear to scattered conditions are present over the W half of the CWA. Current obs show how the differences in cloud cover have impacted area temps . with coastal obs sites reporting in the mid 60s while some sites east of the Sound are actually lagging behind that. Not so much though as to throw off inherited high temps as temp trends combined with a couple more hours of heating should do the trick.

Models remain on track for generally dry conditions this afternoon and throughout the weekend . even stretching into Monday . as an upper level ridge sets up over the area. This will result in generally clear skies for the area which will help afternoon highs Sunday and Monday climb back to near seasonal normals. Interior highs Sunday will rebound into the mid to upper 70s and Monday will see conditions get to maybe just a degree or two above seasonal normals with highs in the upper 70s to lower 80s.

An upper level low well to the north in Canada will drag an associated trough through W WA Tuesday. Current deterministic models keep any associated precip north of the border and ensemble members agree . so will dry out this portion of the forecast for the afternoon package. Cool temps with this feature remain in the forecast though . with mild temps expected in the interior as highs will range from the lower to mid 70s. 18

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Wednesday still on track to be the coolest day of the week although . as stated above . generally dry conditions expected to be in place. Some locations in the northern third of the CWA could possibly see some precip . but current PoPs below 15 pct. Thursday sees another upper level trough pass through the area . but this time the feature may plunge south enough to bring some chance of showers to the area. Deterministic models differ on this though . with the GFS keeping the feature far enough to the north for nothing to happen while the ECMWF manages to bring in an impressive slug of moisture. Given the time of year as well as the minimal confidence inspired by this divergence in solutions . to say nothing of the ensembles general meh on the matter . have opted to split the difference with only slight chance to low end chance PoPs in the forecast at this time. An upper level ridge starts to build over the area late in the afternoon Friday and intensifies Saturday . returning dry conditions to the area during this timeframe. Temps throughout the long term will gradually warm but never really getting above seasonal normals. 18

AVIATION. There were clouds this evening in much of the Puget Sound area south of about Poulsbo and also over the Cascades. Elsewhere skies were mostly clear. There will be some areas of morning low clouds, otherwise sunshine will be the rule on Sunday as an upper ridge shifts toward the area.

KSEA . Clearing skies and a northerly breeze this evening. Sunday will be sunny as an upper ridge shifts toward the area.

MARINE. Westerly small craft advisory level winds are likely in the Strait of Juan de Fuca most evenings. At least a couple of weak weather systems will reach the area in the week ahead-- strengthening onshore flow at times. Over the coastal waters, seas are forecast to get up around 10 feet Monday night and Tuesday.

HYDROLOGY. The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed until then.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 2 AM PDT Sunday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 8 AM PDT Sunday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46118 7 mi40 min ESE 12 58°F 1022.8 hPa58°F
CHYW1 - 9449424 - Cherry Point, WA 8 mi47 min 1023.6 hPa
CPMW1 8 mi47 min S 6 G 7 60°F
FRDW1 - 9449880 - Friday Harbor, WA 22 mi59 min WSW 2.9 G 5.1 53°F 53°F1023.6 hPa
PBFW1 - Padilla Bay Reserve, WA 24 mi65 min SSE 1.9 51°F 1024 hPa51°F
SISW1 - Smith Island, WA 31 mi25 min W 6 G 9.9 54°F 1024.4 hPa51°F
46088 - New Dungeness, WA (Hein Bank) 39 mi35 min WSW 7.8 G 9.7 52°F1024.2 hPa
PTWW1 - 9444900 - Port Townsend, WA 45 mi47 min SSE 1 G 4.1 58°F 52°F1024.6 hPa

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA9 mi42 minS 410.00 miFair56°F51°F84%1024.1 hPa
Eastsound, Orcas Island Airport, WA11 mi40 minN 010.00 miA Few Clouds59°F53°F82%1023.4 hPa
Friday Harbor Airport, WA24 mi42 minW 39.00 miPartly Cloudy49°F48°F97%1024 hPa

Link to 5 minute data for KBLI

Wind History from BLI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmS6SW6534NW765NW5NW6CalmCalmCalmS3S5S4
1 day agoS12S8S10S8
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S73CalmCalmCalmNE3CalmCalmCalmCalm
2 days agoSW5S11S11
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Tide / Current Tables for Point Migley, Washington
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Point Migley
Click for Map
Sun -- 03:55 AM PDT     3.01 feet Low Tide
Sun -- 05:56 AM PDT     Sunrise
Sun -- 09:40 AM PDT     5.58 feet High Tide
Sun -- 12:10 PM PDT     Moonset
Sun -- 03:10 PM PDT     2.58 feet Low Tide
Sun -- 08:34 PM PDT     Sunset
Sun -- 10:14 PM PDT     7.86 feet High Tide
Sun -- 11:22 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.45.13.93.233.23.84.45.15.55.65.24.53.62.92.62.73.34.25.46.57.47.87.7

Tide / Current Tables for Clark Island, 1.6 mile North of, Washington Current
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Clark Island
Click for MapFlood direction 335 true
Ebb direction 150 true

Sun -- 01:43 AM PDT     -1.13 knots Max Ebb
Sun -- 05:56 AM PDT     Sunrise
Sun -- 06:41 AM PDT     0.00 knots Slack
Sun -- 08:30 AM PDT     0.32 knots Max Flood
Sun -- 09:51 AM PDT     -0.00 knots Slack
Sun -- 12:10 PM PDT     Moonset
Sun -- 01:14 PM PDT     -0.77 knots Max Ebb
Sun -- 05:25 PM PDT     0.00 knots Slack
Sun -- 08:35 PM PDT     Sunset
Sun -- 08:38 PM PDT     0.85 knots Max Flood
Sun -- 10:55 PM PDT     -0.00 knots Slack
Sun -- 11:22 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-1-1.1-1-0.8-0.6-0.20.10.30.3-0-0.4-0.7-0.8-0.7-0.6-0.4-0.10.20.50.80.80.4-0

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 (3,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.