Thursday, December12, 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 Thursday December 12, 2019 2:03 PM PST (22:03 UTC) Moonrise 5:01PMMoonset 8:09AM Illumination 99% 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- 829 Am Pst Thu Dec 12 2019
.small craft advisory in effect until 5 pm pst this afternoon...
Today..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers likely in the morning then rain in the afternoon.
Tonight..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Showers likely in the evening then showers after midnight.
Fri..SW wind 5 to 15 kt becoming S to 10 kt in the afternoon. Wind waves 2 ft or less. Showers likely.
Fri night..S wind 5 to 15 kt becoming variable after midnight. Wind waves 2 ft or less.
Sat..Variable wind to 10 kt in the morning becoming light. Wind waves 1 ft or less in the morning becoming less than 1 ft.
Sat night..N wind to 10 kt becoming 5 to 15 kt after midnight. Wind waves 2 ft or less.
Sun..NW wind to 10 kt becoming light. Wind waves 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
PZZ100 829 Am Pst Thu Dec 12 2019
Synopsis for the northern and central washington coastal and inland waters..Another organized frontal boundary will move through the area today, reinforcing breezy and rainy conditions. A isolated Thunderstorm will also be possible across the coastal waters on Thursday. Onshore flow Thursday night will ease Friday. A weather disturbance will move ashore south of the area over the weekend.


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 121714 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 915 AM PST Thu Dec 12 2019

SYNOPSIS. A frontal system will move through Western Washington today followed by a cool upper level trough Friday and Saturday. A weak warm front may result in some areas of light rain on Sunday. Upper level ridging will likely support a dry start to next week followed by a more active weather late in the week.

SHORT TERM /TODAY THROUGH SATURDAY/. Rain with mountain snow above about 3500 feet today as a front continues to work onshore. There has been just enough instability over the coastal waters this morning to support a few lightning strikes - so the forecast has been updated to include mention of that through the evening hours, this will include the coast during the afternoon. For remainder of the lowlands today scattered showers this morning will become a bit more organized this afternoon as the front moves into the area.

Snow levels over the mountains will linger in the 3500 to 4000 foot range today. Precipitation in the mountains will continue to be showery this morning with more steady precipitation expected ahead of and with the the front as it moves east this afternoon. Snow levels will dip closer to 3000 feet overnight with the cooler air behind the front - at the same time, showers should begin to trend downward. Accumulations will remain possible through Friday afternoon - but should be on the diminishing end of the spectrum.

Overall hower activity decreasing Friday afternoon with highs on a couple of degrees cooler, mostly in the mid to upper 40s. The upper level trough will linger over the area Friday night into Saturday keeping showers in the forecast. Lows in the upper 30s and 40s. Highs in the mid and upper 40s.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. from previous discussion . Not a lot of confidence in the extended forecast. Operational models are trending toward a drier forecast for the first part of next week while the ensembles and the model blends are not having any part of it. With the uncertainty in the models have left broad brush chance pops in the forecast through Tuesday. Models continuing with the inconstant solutions late in the period with the 00z runs keeping the split flow pattern intact keeping the front that was timed into the area on Wednesday out of the area. Will continue with the mostly chance pops for Wednesday and Thursday as well. Felton

AVIATION. Westerly flow aloft continues today as a broad upper trough remains over the northeast Pacific. The air mass is moist and somewhat unstable. A secondary frontal system will shift onshore across Western Washington this morning with a mix of VFR and MVFR ceilings in showers. Some rain shadowing by the Olympics could keep ceilings in the VFR category for central Puget Sound terminals part of the day. Low level flow will be S-SW with surface winds gusting to around 20-25 knots near the front as moves inland.

KSEA . Shower coverage will increase through the morning as another frontal system moves into the region. Ceilings will dip to MVFR in and around heavier showers. Surface winds S-SW 10 to 15 knots gusting 20-25 knots with the passage of the front this afternoon.

27

MARINE. A robust frontal boundary will continue to make eastward progress this morning across the western Washington marine waters. An unstable air mass will produce isolated thunderstorms with the main threat being lightning. Small craft advisory winds will continue across most of the waters today. Winds are the expected to ease this afternoon into the evening hours. However, swell will remain high across the Coastal Waters so will keep SCA going for this area all the way into Saturday. Swells are expected to increase to between 17-18ft thru the day Thursday and remain in the 14-16ft range through Friday into early Saturday. Swells will also present hazardous surf conditions along the Washington Coast on Thursday so the High Surf Advisory will remain in effect into Friday.

Hazardous weather conditions over the waters are expected to subside by the latter half of the weekend.

Kovacik/27

HYDROLOGY. Relatively low snow levels and limited precipitation amounts today and Friday will result in little or no impacts on area rivers. There are no flooding concerns at this time. Saturday through the middle of next week river flooding is not expected.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Warning until 10 AM PST Friday 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 Friday for Central Coast- North Coast.

Winter Weather Advisory until 9 PM PST this evening for Olympics.

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.

Small Craft Advisory until 5 PM PST this afternoon for 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
TCNW1 - 9446484 - Tacoma, WA 37 mi52 min 49°F 51°F1011.5 hPa
TCMW1 - 9446482 - Tacoma Met, WA 37 mi52 min SSE 8 G 11
46121 48 mi29 min 5.8 49°F 1010.9 hPa46°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 mi89 minS 710.00 miMostly Cloudy46°F46°F100%1011.8 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
Thu -- 05:57 AM PST     12.39 feet High Tide
Thu -- 07:47 AM PST     Sunrise
Thu -- 08:12 AM PST     Moonset
Thu -- 11:06 AM PST     7.40 feet Low Tide
Thu -- 03:50 PM PST     11.42 feet High Tide
Thu -- 04:19 PM PST     Sunset
Thu -- 05:00 PM PST     Moonrise
Thu -- 11:10 PM PST     -1.98 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-02.35.38.210.51212.411.910.89.387.47.78.810.111.111.410.79.16.741.2-1-2

Tide / Current Tables for Steilacoom, Washington
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Steilacoom
Click for Map
Thu -- 06:27 AM PST     14.29 feet High Tide
Thu -- 07:47 AM PST     Sunrise
Thu -- 08:12 AM PST     Moonset
Thu -- 11:43 AM PST     7.69 feet Low Tide
Thu -- 04:20 PM PST     13.18 feet High Tide
Thu -- 04:20 PM PST     Sunset
Thu -- 05:01 PM PST     Moonrise
Thu -- 11:47 PM PST     -2.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-11.14.27.710.913.114.214.113.111.39.487.78.710.312.113.112.911.69.46.53.30.4-1.5

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 (17,4,5,8)
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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.