Wednesday, December11, 2019
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Marine Weather and Tides
Raft Island, 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 Wednesday December 11, 2019 8:18 PM PST (04:18 UTC) Moonrise 4:17PMMoonset 7:06AM Illumination 100% Phase: Full Moon; Moon at 15 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- 238 Pm Pst Wed Dec 11 2019
.small craft advisory in effect through Thursday afternoon...
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain.
Thu..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain.
Thu night..SW wind 10 to 20 kt rising to 15 to 25 kt after midnight. Wind waves 2 to 4 ft. Rain.
Fri and Fri night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat and Sat night..Variable wind to 10 kt. Wind waves 1 ft or less.
Sun..SE wind to 10 kt. Wind waves 1 ft or less.
Mon..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 238 Pm Pst Wed Dec 11 2019
Synopsis for the northern and central washington coastal and inland waters..A vigorous frontal system will move through the area this evening. A trough will cross the area 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 Raft Island, WA
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location: 47.33, -122.67     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 112237 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 237 PM PST Wed Dec 11 2019

SYNOPSIS. An active weather pattern across the Pacific NW the next several days will continue. A trough of low pressure will bring rain and mountain snow the next several days with significant snow accumulation in the highest elevations. There will be drier and cool weather by Saturday and Sunday, and early next week, before a more active pattern develops again in the middle of next week.

SHORT TERM /TONIGHT THROUGH SATURDAY/. Radar shows showers continuing to overspread the forecast area this afternoon and this trend is set to continue. Snow levels have started out lower than earlier expectations, with snow falling in Snoqualmie Pass already. This is due to the local effects of easterly flow bringing lower snow levels in the pass. This has been the biggest change to the snow forecast, with heavier accumulations there. As a result, the winter storm warning was amended to reflect impacts down to 3000 ft of elevation. Snow levels will remain in the 3000-3500 foot range for most of the overnight, and will increase on Thursday morning as westerly flow pushes in. Thursday will bring showery conditions, with a chance of heavy mountain snow showers by Thursday evening.

Winds will increase out of the south tonight and into early Thursday. They will not be overly significant or impactful, but gusts up to 35 MPH are possible, especially near the water.

The concern on Thursday will be an increase in intensity of the showers by later afternoon. 6 hourly model QPF in the .25-.50 inch range suggests heavy showers in the mountains that will be capable of local dynamic cooling to cause snow levels to fall and produce brief periods of heavy snow. This will bring additional travel concerns, especially for Snoqualmie Pass where the snow levels are likely to rise Thursday morning, but fall again in the heavier snow showers Thursday afternoon.

Additionally, SPC guidance indicates chances of coastal thunderstorms the next few days, and this seemed reasonable, and so an isolated mention is present in the coastal areas.

Friday will bring a decrease in precip and a weak ridge will attempt to build in aloft. So temperatures will dip to near or below normal this weekend with somewhat drier weather although showers will be present in some form across the area through the weekend, just not overly widespread.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Ridging will actually start off the extended period and it looks to hold across the area into the start of next week. The breakdown of this ridging is in question and so the details remain in lower confidence levels at this time. The overall trend will be however for temperatures near normal. After this system today through Friday, there do not appear to be any significant weather impacts on the horizon.

AVIATION. A vigorous frontal system will move through Western Washington this evening with strong southwest flow aloft. Tonight and Thursday will have periods of rain and typical Western Washington rainy day cigs and reduced vsby. The mountains and foothills will remain obscured.

KSEA . Periods of rain with breezy southerly winds tonight and Thursday. Cigs will average 1500-2500ft and vsby will drop at times to 3-5miles in rain.

MARINE. A strong frontal system will move through the area this evening. A trough will move ashore on Thursday. Gale warnings are up for the coastal waters, east entrance to the Strait of Juan de Fuca, and the northern waters. For the coastal waters, swell Thursday and Friday should be 15-18 feet with the main period around 16 seconds.

HYDROLOGY. A wet storm system will impact the region this afternoon through Friday. Given precipitation amounts and snow levels in the 3500-5000 foot range - most rivers are not expected to approach flood stage. There is some concern that the Skokomish River in Mason County could approach flood stage. We will continue to monitor this situation.

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.

Winter Weather Advisory until 9 PM PST Thursday for Olympics.

PZ . Gale Warning until 9 PM PST this evening 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 until 2 AM PST Saturday for Grays Harbor Bar.

Gale Warning until 1 AM PST Thursday for East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory until 4 PM PST Thursday for West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until midnight PST tonight for Central U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 4 AM PST Thursday for Admiralty Inlet.

Small Craft Advisory until 5 PM PST Thursday for Puget Sound and Hood Canal.



www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 5 mi33 min 49°F 1009.3 hPa47°F
TCMW1 - 9446482 - Tacoma Met, WA 14 mi48 min ESE 4.1 G 5.1
TCNW1 - 9446484 - Tacoma, WA 14 mi48 min 47°F 51°F1010.2 hPa
WPOW1 - West Point, WA 26 mi18 min SE 12 G 14 46°F 1009.1 hPa (-2.6)44°F
46120 33 mi27 min S 5.8 49°F 1008.7 hPa45°F
46125 40 mi26 min 48°F 1007.8 hPa46°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tacoma, Tacoma Narrows Airport, WA6 mi25 minN 010.00 miLight Rain46°F45°F96%1009 hPa
Bremerton, Bremerton National Airport, WA12 mi22 minSE 37.00 miLight Rain46°F45°F96%1010.7 hPa
Tacoma / McChord Air Force Base, WA15 mi80 minN 06.00 miLight Rain Fog/Mist46°F45°F100%1011 hPa
Fort Lewis / Gray U. S. Army Airfield, WA17 mi80 minE 510.00 miLight Rain47°F46°F100%1010.3 hPa
Seattle, Seattle-Tacoma International Airport, WA21 mi25 minESE 9 G 168.00 miLight Rain46°F42°F86%1010.2 hPa
Boeing Field - King County International Airport, WA24 mi25 minESE 48.00 miLight Rain47°F44°F90%1009.6 hPa

Link to 5 minute data for KTIW

Wind History from TIW (wind in knots)
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Last 24hrS5S3S7S5S5SW5CalmW4SW3CalmS3CalmCalmCalmCalmCalmS3CalmS5S5S4CalmCalmCalm
1 day agoCalmCalmCalmCalmS6SE3S4S4SW9SW8S7S6S7SW7S5S5CalmS4CalmCalmCalmCalmCalmS4
2 days agoCalmN3NE3CalmCalmNE3NE3E3NE3N5N4NW4N4CalmSE3NE3CalmNE4NE4N4N3E3CalmCalm

Tide / Current Tables for Horsehead Bay, Carr Inlet, Puget Sound, Washington
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Horsehead Bay
Click for Map
Wed -- 05:50 AM PST     13.66 feet High Tide
Wed -- 07:05 AM PST     Moonset
Wed -- 07:47 AM PST     Sunrise
Wed -- 11:02 AM PST     7.45 feet Low Tide
Wed -- 03:47 PM PST     13.16 feet High Tide
Wed -- 04:16 PM PST     Moonrise
Wed -- 04:20 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:12 PM PST     -1.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.63.16.39.411.913.313.61311.59.68.17.589.511.312.713.112.410.6852-0.4-1.5

Tide / Current Tables for Hale Passage, West end, Washington Current
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Hale Passage
Click for Map
Wed -- 12:47 AM PST     1.70 knots Max Flood
Wed -- 03:33 AM PST     -0.01 knots Slack
Wed -- 07:05 AM PST     Moonset
Wed -- 07:45 AM PST     -1.26 knots Max Ebb
Wed -- 07:47 AM PST     Sunrise
Wed -- 11:35 AM PST     0.01 knots Slack
Wed -- 12:40 PM PST     0.88 knots Max Flood
Wed -- 01:59 PM PST     -0.01 knots Slack
Wed -- 04:16 PM PST     Moonrise
Wed -- 04:20 PM PST     Sunset
Wed -- 06:58 PM PST     -2.31 knots Max Ebb
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:33 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.31.71.30.5-0.3-0.7-1.1-1.2-1.3-1.1-0.9-0.40.50.8-0-0.7-1.3-1.8-2.2-2.3-2.2-1.8-1.3-0.5

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 (23,6,7,8)
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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 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.