Friday, December13, 2019
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Marine Weather and Tides
Ashford, WA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:44AMSunset 4:21PM Friday December 13, 2019 4:32 AM PST (12:32 UTC) Moonrise 5:56PMMoonset 9:12AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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- 236 Am Pst Fri Dec 13 2019
Today..S wind 5 to 15 kt becoming to 10 kt in the afternoon. Wind waves 2 ft or less. A chance of showers. A slight chance of tstms in the afternoon.
Tonight..NW wind to 10 kt. Wind waves 1 ft or less. A chance of showers.
Sat..Variable wind to 10 kt in the morning becoming light. Wind waves 1 ft or less. A chance of showers.
Sat night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sun..Light wind becoming S to 10 kt in the afternoon. Wind waves 1 ft or less.
Sun night..S wind to 10 kt. Wind waves 1 ft or less.
Mon..SE wind to 10 kt becoming light. Wind waves 1 ft or less.
Tue..Light wind. Wind waves less than 1 ft.
PZZ100 236 Am Pst Fri Dec 13 2019
Synopsis for the northern and central washington coastal and inland waters..Winds have eased across all waters in wake of a frontal passage this morning. A weak surface ridge will build over the coastal waters today and persist into the weekend for a transition to quieter conditions across area waters. Low level offshore flow is expected to develop early next week as surface ridging builds east of the cascades.


7 Day Forecast for Marine Location Near Ashford, WA
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location: 46.81, -122.06     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 131028 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 228 AM PST Fri Dec 13 2019

SYNOPSIS. Heavy snow showers will taper off in the Cascades today. Expect scattered showers with a possible thunderstorm in the lowlands. A ridge will bring quieter weather this weekend and into early next week. The weather pattern may turn more active late next week.

SHORT TERM /TODAY THROUGH SUNDAY/. Heavy snow continues across the west slopes of the Cascades this morning - a Winter Storm Warning remains in effect. Snow levels are around 3500 feet with heavy snow impacting the higher passes like Stevens Pass and White Pass. Snoqualmie Pass is seeing a rain/snow mix but they still managed to record around 9 inches. Showers will taper off late this morning and afternoon with coverage becoming more scattered. There is still a possibility of snow showers in the mountains but heavy accumulations are not expected.

Meanwhile, the air mass over western WA will remain cool and slightly unstable across the region. Offshore we are seeing convective-type cells that will drift inland through the day and isolated thunderstorms cannot be ruled out. Otherwise, we may see a few breaks in the clouds for partly sunny skies. Expect highs in the 40s this afternoon.

Western WA will lie under NW flow this weekend as an upper level ridge builds offshore. Models show just isolated showers over the area as a weak disturbance moves down from B.C. But overall we will see less active weather compared to the last few days. 33

LONG TERM /MONDAY THROUGH THURSDAY/. An upper level ridge will shift inland early next week, pushing the bulk of moisture north into B.C. This ridge may linger over the region through around midweek before it starts to weaken/flatten. This then opens the door for a stronger and wetter Pacific frontal system slated for next Thursday or Friday. This may result in another round of heavy snow in the mountains. 33

AVIATION. Westerly flow aloft turning more northwesterly this evening and remaining that way into Saturday. Surface flow will ease with gusts winding down and wind speeds easing to generally 5 to 10 kts from mid to late morning and through the remainder of the TAF period. Wind direction will remain south to southwest.

Cigs a mixed bag out there this morning as showers persist over the area. Most locations reporting VFR to MVFR conditions in place although some showers are dragging conditions down into IFR. These IFR conditions are fairly isolated though. Should start to see conditions improve by late morning/early afternoon with widespread VFR conditions in place over W WA by early afternoon. Plenty of low level moisture will allow for conditions to deteriorate this evening and tonight with widespread MVFR to some isolated patches of IFR returning to finish off the TAF period.

KSEA . Lingering showers will still be a possibility as moisture lingers from exiting system . but coverage still expected to diminish through the day today. Cigs this morning will flip back and forth between VFR and MVFR Given abundant low level moisture. will lean more toward MVFR for TAF in the morning but will see improvement to solid VFR between 18-20Z today. MVFR conditions will likely return tonight with aforementioned low level moisture still in place Winds south 8-12 kts this morning. easing to 5-10 kts by this afternoon. SMR

MARINE. Another frontal system passed across western Washington, bringing with another round of widespread rainfall over the waters. Recent radar imagery suggests the rainfall has become more scattered, tho it does continue to affect some of the waters, particularly the Strait and the Northern Inland Waters. Scattered showers will continue through the morning hours today, gradually decreasing in coverage with time through the afternoon.

Winds have been easing across the waters over the last 12 hours and this trend will continue. Do not see any areas that will meet or exceed small craft advisory criteria for wind over the next couple of days. The main marine related hazard that remain in place today and into the first half of Saturday will be hazardous seas across the coastal waters. Swells in the 17-19ft range are possible this morning and are expected to gradually subside a few feet down into 14-16 ft range by the evening. Swells will also be hazardous in the western Strait of Juan de Fuca, tho will remain a few feet below the coastal waters. Seas will continue to subside into Saturday but look to remain hazardous through most of the morning.

With the highest swells expected this morning (Friday), have left High Surf Advisory in place thru 18z (10am) along the Washington Coast. However, make note that seas will still be rough into Saturday.

Kovacik

HYDROLOGY. There are no flooding concerns at this time. Relatively low snow levels and limited precipitation amounts will result in little or no impacts on area rivers.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Warning until 10 AM PST this morning for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties.

High Surf Advisory until 10 AM PST this morning for Central Coast-North Coast.

PZ . Small Craft Advisory until 10 AM PST 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-Grays Harbor Bar-West 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
TCNW1 - 9446484 - Tacoma, WA 37 mi57 min 45°F 51°F1020.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 37 mi57 min S 5.1 G 7
46121 48 mi34 min 3.9 45°F 1019.9 hPa43°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pierce County-Thun Field, WA24 mi58 minVar 4 G 1110.00 miOvercast45°F41°F87%1020 hPa

Link to 5 minute data for KPLU

Wind History from PLU (wind in knots)
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Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
Click for Map
Fri -- 06:36 AM PST     12.82 feet High Tide
Fri -- 07:48 AM PST     Sunrise
Fri -- 09:14 AM PST     Moonset
Fri -- 11:50 AM PST     7.52 feet Low Tide
Fri -- 04:19 PM PST     Sunset
Fri -- 04:27 PM PST     11.34 feet High Tide
Fri -- 05:55 PM PST     Moonrise
Fri -- 11:48 PM PST     -2.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.40.43.36.49.411.512.612.71210.697.97.58.19.210.411.211.210.18.15.62.70.1-1.7

Tide / Current Tables for Tacoma, Commencement Bay, Sitcum Waterway, Puget Sound, Washington (sub)
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (7,2,3,4)
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Ground Weather Radar Station Portland, OR
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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 numerious 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.