Friday, April10, 2020
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Marine Weather and Tides
Allyn, 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 6:27AMSunset 7:55PM Friday April 10, 2020 10:54 AM PDT (17:54 UTC) Moonrise 10:39PMMoonset 7:19AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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- 900 Am Pdt Fri Apr 10 2020
Today..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Tonight..NW wind 5 to 15 kt becoming variable to 10 kt after midnight. Wind waves 2 ft or less.
Sat..Variable wind to 10 kt becoming N in the afternoon. Wind waves 2 ft or less.
Sat night..N wind 10 to 20 kt easing to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight.
Sun..NE wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Sun night..N wind to 10 kt becoming ne after midnight. Wind waves 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
Tue..Light wind. Wind waves less than 1 ft.
PZZ100 900 Am Pdt Fri Apr 10 2020
Synopsis for the northern and central washington coastal and inland waters..Low level onshore flow continuing through tonight then weakening on Saturday.the flow will become offshore late Saturday into Sunday. Northwesterly flow is expected to resume early next week.


7 Day Forecast for Marine Location Near Allyn, WA
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location: 47.39, -122.91     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 101623 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 923 AM PDT Fri Apr 10 2020

SYNOPSIS. Generally quiet weather through next week. Dry N/NW flow expected with a few showers in the Cascades and nearby foothills possible on Saturday.

SHORT TERM /TODAY THROUGH SUNDAY/. Generally the forecast is still on track to be mild and mostly dry through the weekend. The omega block pattern is still in place and likely to hold. This means quiet and dry weather is in store for the area. Some high res model guidance is still suggesting possible shower activity developing across King County on Saturday morning, so POPs may need to be adjusted in this afternoon's forecast update.

Some passing high clouds are in store for the area today as a shortwave system passes to our north. Light onshore flow this morning has brought some low stratus clouds to the coastal areas, and visibilities remain low in places at this time. Conditions in these areas should improve later today.

By late tonight and into Saturday, a shortwave trough coming in from the Gulf of Alaska will cause some shower activity in the Cascades and nearby foothills regions before quickly diving further south on Saturday night. Anything that matriculates out of this passing system is not expected to be impactful as it will be combating dry northerly flow aloft.

Kristell

LONG TERM /MONDAY THROUGH THURSDAY/. Beginning the long term forecast period on Sunday, the previously mentioned quick-moving wave from Saturday will begin to spark a noticeable pattern change across the US and dives south into the Rockies. It will essentially merge with the southern stream flow and allow for the development of highly amplified longwave trough pattern across much of the lower 48. Upstream from this feature, the ridge will also amplify across the Pacific into Alaska. This will essentially keep for a dry N/NW flow pattern across the Pacific Northwest as we remain caught between the 2 features. This will keep for dry conditions Sunday and Monday. By Tuesday, expected discrepancies between deterministic ECMWF and GFS emerge, so after consulting CMC/GEFS/EPS ensemble data, the overall trend is for a slowly progressive pattern, which may push the ridge closer to the region, providing for the continuation of warm and dry weather. Right now it is unclear if a weak wave will pass over the ridge and spark a few showers around Tuesday, but for now the ECMWF/EPS guidance is the only model guidance suggestive of this.

Kovacik

AVIATION. Weak marine push overnight with satellite imagery showing stratus through the Strait of Juan de Fuca into Whidbey Island in the north and through the Lower Chehalis Valley into the Southern Puget Sound in the south. The coast is cloudy.

Stratus layer is shallow with the Black Hills above the stratus. Tops in the 1500-2000 foot range. The stratus will dissipate back to the coastline this afternoon. Low level onshore flow continuing overnight into Saturday morning with the stratus moving back inland overnight into Saturday morning. Expect widespread ceilings in the 1000 to 1500 foot range Saturday morning after 12z with isolated ceilings below 1000 feet. The stratus will dissipate 18z-21z Saturday.

KSEA . Just some high clouds through this afternoon. Strato cumulus deck forming over the eastern slopes of the Olympics could float over the airport in the evening with ceilings near 5000 feet. Stratus arriving Saturday morning with ceilings 1000-1500 feet 12z-18z. Light winds becoming northwesterly 4 to 8 knots late afternoon. Winds becoming southerly 4 to 8 knots after 09z Saturday. Felton

MARINE. Low level onshore flow continuing through tonight then weakening on Saturday for another round of small craft advisories in the Strait of Juan de Fuca tonight into early Saturday. Small craft advisories will continue over the coastal waters. Swells building tonight into the 10 to 12 foot range for Saturday with the swell subsiding back below 10 feet Saturday night. The flow will become offshore late Saturday into Sunday. Northwesterly flow is expected to resume early next week. Felton

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

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 5 PM PDT Saturday 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 from 6 PM this evening to 5 AM PDT Saturday for Admiralty Inlet-Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 12 mi37 min 1.9 46°F 1020.5 hPa45°F
TCMW1 - 9446482 - Tacoma Met, WA 27 mi55 min WNW 6 G 8
TCNW1 - 9446484 - Tacoma, WA 28 mi55 min 49°F 49°F1020.6 hPa (+0.6)
WPOW1 - West Point, WA 31 mi55 min S 5.1 G 5.1 48°F 1020 hPa (+0.7)47°F
46120 37 mi43 min Calm 51°F 1019.2 hPa45°F
46125 39 mi44 min 47°F 1019.3 hPa44°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bremerton, Bremerton National Airport, WA10 mi59 minWSW 510.00 miFair52°F42°F69%1020.2 hPa
Shelton, Shelton Sanderson Field, WA17 mi62 minWSW 610.00 miOvercast46°F43°F89%1019.8 hPa
Tacoma, Tacoma Narrows Airport, WA19 mi62 minSW 52.00 miFog/Mist44°F42°F93%1020.6 hPa

Link to 5 minute data for KPWT

Wind History from PWT (wind in knots)
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Last 24hrNE8NE54E76NE7E11NE6NE5NE4NE5CalmCalmCalmCalmCalmSW3CalmCalmCalmCalmSW3SW4SW5
1 day agoNE10NE15NE11NE7
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NE9NE8NE9NE8NE7NE6E4E3SE3CalmCalmCalmE3CalmCalmCalmCalmNE3NE7NE7
2 days agoSE5NE4E4W5SW5W3CalmNE5NE5CalmCalmCalmCalmCalmCalmCalmNE9NE9E6NE6E6E5NE9NE12
G17

Tide / Current Tables for Lynch Cove Dock, Washington
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Lynch Cove Dock
Click for Map
Fri -- 01:07 AM PDT     3.97 feet Low Tide
Fri -- 06:31 AM PDT     Sunrise
Fri -- 06:44 AM PDT     12.68 feet High Tide
Fri -- 08:18 AM PDT     Moonset
Fri -- 01:36 PM PDT     -1.50 feet Low Tide
Fri -- 07:54 PM PDT     Sunset
Fri -- 08:20 PM PDT     12.36 feet High Tide
Fri -- 11:40 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.844.56.28.510.712.312.611.79.56.63.40.6-1.2-1.40.12.75.9911.212.312.1119.2

Tide / Current Tables for Colville Island, 1 miles SSE of, Washington Current
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Colville Island
Click for Map
Fri -- 02:42 AM PDT     0.00 knots Slack
Fri -- 05:10 AM PDT     1.47 knots Max Flood
Fri -- 06:31 AM PDT     Sunrise
Fri -- 07:52 AM PDT     -0.00 knots Slack
Fri -- 08:18 AM PDT     Moonset
Fri -- 11:25 AM PDT     -3.96 knots Max Ebb
Fri -- 03:17 PM PDT     0.01 knots Slack
Fri -- 06:07 PM PDT     2.26 knots Max Flood
Fri -- 07:54 PM PDT     Sunset
Fri -- 09:57 PM PDT     -0.00 knots Slack
Fri -- 11:39 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.2-1.6-0.70.211.51.30.7-0.2-1.7-3.1-3.9-3.8-3-1.8-0.40.91.92.32.11.60.9-0.1-1.3

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 (13,3,4,5)
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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.