Sunday, April5, 2020
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Marine Weather and Tides
Anderson Island, 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 6:41AMSunset 7:46PM Saturday April 4, 2020 9:01 PM PDT (04:01 UTC) Moonrise 2:26PMMoonset 4:27AM Illumination 91% Phase: Waxing Gibbous; Moon at 12 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- 833 Pm Pdt Sat Apr 4 2020
Tonight..N wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
Sun night..N wind to 10 kt rising to 5 to 15 kt after midnight. Wind waves 2 ft or less.
Mon..N wind 5 to 15 kt becoming S in the afternoon. Wind waves 2 ft or less.
Mon night..NW wind 10 to 20 kt becoming sw after midnight. Wind waves 1 to 3 ft.
Tue..Light wind. Wind waves less than 1 ft.
Tue night..Light wind. Wind waves less than 1 ft.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
Thu..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
PZZ100 833 Pm Pdt Sat Apr 4 2020
Synopsis for the northern and central washington coastal and inland waters..Weak low pressure will remain over oregon through Sunday with generally light north to northeast flow across western washington. The flow will turn onshore on Monday as high pressure builds over the ne pacific, with westerly winds increasing through the strait. Weak offshore flow will develop midweek.


7 Day Forecast for Marine Location Near Anderson Island, WA
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location: 47.11, -122.73     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 050333 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 833 PM PDT Sat Apr 4 2020

UPDATE. Dry conditions across most of Western Washington this evening with light offshore flow. Light rain is sliding northward across portions of southern WA with an upper level low offshore, however not much in the way of precipitation is expected with dry air over the area. Slight chance of a showers across the Southwest Interior and South Sound into tonight. Dry conditions for Sunday. Winds light northerly.

SYNOPSIS. Upper level low offshore will move south tonight and Sunday. A weak upper level trough will move over the area from the north Sunday. Upper level ridge to build offshore Monday with the ridging moving inland in the middle of next week. Another weather system will try to move through the ridge next Friday or Saturday.

SHORT TERM /TONIGHT THROUGH TUESDAY/. Satellite imagery shows mostly cloudy skies over most of Western Washington this afternoon. Doppler radar not picking up any shower activity at 23z/4 pm with the leading edge of the band of showers moving up from the south near Portland. Temperatures were in the mid 40s to lower 50s.

Upper level low well offshore will continue to dig south tonight. This will make the flow aloft over Western Washington more southernly pushing the shower activity over the Portland area north into the Southwest Interior. This feature is splitting slightly as it moves north so expect the shower activity to die off before it reaches the Central Puget Sound. Mostly cloudy conditions will continue overnight. Lows in the 30s and lower 40s.

Upper level low offshore continuing to move south Sunday with the southerly flow aloft shutting off then being replaced by a drier northwesterly flow aloft as an upper level trough moves into the area. Air mass slightly unstable with the trough but with the limited moisture will confine the chance of showers mostly to the higher terrain. Some mid and high level moisture will keep skies partly sunny/mostly cloudy. Highs a little warmer, in the lower to mid 50s.

Upper level trough hanging over the area Sunday evening before kicking off to the east early Monday morning. This will keep the threat of showers in the Cascades intact Sunday night. For the remainder of the area cloud cover decreasing overnight as the trough moves east. Lows Monday morning in the 30s with the cooler locations near freezing.

Northwesterly flow aloft continuing on Monday as an upper level ridge slowly starts to build over the eastern Pacific. Low level onshore flow will bring some morning clouds to the area with mostly sunny skies in the afternoon. Highs in the 50s with lower 60s possible over the Southwest Interior.

Upper level ridge continuing to slowly build offshore Monday night into Tuesday with dry northwesterly flow aloft. Surface flow remaining onshore combined with the ridge being relatively weak will keep high temperatures mostly in the 50s but Tuesday will be a dry day.

LONG TERM /WEDNESDAY THROUGH SATURDAY/. Extended models in good agreement Wednesday and Thursday with the upper level ridge nosing into the area Wednesday night and Thursday. Thursday looks to be the warmer day of the two sunny days with warmer locations getting into the mid 60s. The forecast high of 63 on Thursday would be the warmest day in Seattle since October 24th. Most of the high Wednesday and Thursday will be in the 50s and lower 60s.

Model consistency breaks down Friday and Saturday with the ECMWF keeping the ridge in place Friday followed by a very weak system Saturday. The GFS breaks the ridge down sooner with rain spreading into the area Friday with a trough trailing the system for Saturday. ECMWF ensemble solutions for Friday have about 20 percent of the members indicating light precipitation, a little more wet then the operational solution. The GFS has a little over half the ensemble members indicating precipitation, drier than the operational run would indicate. End result will have chance pops in the forecast Friday. A few more of the ensemble members are wet for Saturday in the ECMWF but the precipitation is light. Given the inconsistency in the models will stay with chance pops for Saturday. Felton

AVIATION. Southerly flow aloft with an upper level low offshore tonight. Mainly dry conditions expected with light rain chances mainly along the WA/OR border tonight. VFR cigs into Sunday. Northerly winds 5 to 10 knots.

KSEA . VFR cigs. North winds to 10 knots tonight. JD

MARINE. An area of low pressure will slide south offshore of OR/CA into Sunday. Northerly flow across Western Washington. The flow will turn onshore on Monday as high pressure builds over the NE Pacific. Small Craft Advisory, or possibly gale winds, through the Strait of Juan de Fuca Monday evening. Light onshore flow Tuesday and Wednesday across the area. JD

HYDROLOGY. River flooding not expected in the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . None.

www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 12 mi24 min 5.8 49°F 1003.6 hPa34°F
TCMW1 - 9446482 - Tacoma Met, WA 20 mi43 min NNE 15 G 19
TCNW1 - 9446484 - Tacoma, WA 20 mi43 min 50°F 48°F1003.6 hPa
WPOW1 - West Point, WA 41 mi61 min N 13 G 15 47°F 1004 hPa (-0.8)37°F
46120 48 mi29 min 47°F 1003.4 hPa38°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Lewis / Gray U. S. Army Airfield, WA8 mi63 minNE 310.00 miMostly Cloudy50°F34°F55%1003.6 hPa
Olympia, Olympia Airport, WA13 mi67 minSE 6 G 1610.00 miOvercast49°F30°F48%1003.3 hPa
Tacoma / McChord Air Force Base, WA14 mi63 minNNW 410.00 miOvercast49°F29°F47%1003.6 hPa
Tacoma, Tacoma Narrows Airport, WA14 mi68 minN 1110.00 miMostly Cloudy47°F30°F54%1003.3 hPa
Pierce County-Thun Field, WA23 mi66 minW 410.00 miOvercast48°F30°F50%1003 hPa
Shelton, Shelton Sanderson Field, WA24 mi68 minNE 410.00 miOvercast48°F30°F52%1003 hPa

Link to 5 minute data for KGRF

Wind History from GRF (wind in knots)
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Last 24hrS6CalmSE7SE4SE5SE6SE4CalmSE3CalmSE3Calm--CalmNW6N5N5NW7N8
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1 day agoS6S6S5SE6SE7S7SE7S6S8SE7SE10SE8S8S12S10S10SW11
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2 days agoW6NW5CalmW4SE5CalmCalmE3SE4SE3SE4SE5S4S4S5SW7SE8SW6W7----SW7SW7S6

Tide / Current Tables for Dupont Wharf, Washington
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Dupont Wharf
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Sun -- 04:43 AM PDT     14.04 feet High Tide
Sun -- 05:58 AM PDT     Moonset
Sun -- 06:40 AM PDT     Sunrise
Sun -- 10:49 AM PDT     4.78 feet Low Tide
Sun -- 03:59 PM PDT     11.63 feet High Tide
Sun -- 04:47 PM PDT     Moonrise
Sun -- 07:46 PM PDT     Sunset
Sun -- 10:39 PM PDT     0.40 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.56.59.712.213.71413.111.396.75.24.85.67.39.41111.611.19.67.44.82.30.70.5

Tide / Current Tables for Nisqually Reach, Washington Current
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Nisqually Reach
Click for Map
Sun -- 01:29 AM PDT     1.18 knots Max Flood
Sun -- 04:52 AM PDT     -0.00 knots Slack
Sun -- 05:58 AM PDT     Moonset
Sun -- 06:40 AM PDT     Sunrise
Sun -- 08:27 AM PDT     -0.98 knots Max Ebb
Sun -- 11:20 AM PDT     0.00 knots Slack
Sun -- 01:44 PM PDT     0.75 knots Max Flood
Sun -- 04:09 PM PDT     -0.00 knots Slack
Sun -- 04:47 PM PDT     Moonrise
Sun -- 07:46 PM PDT     Sunset
Sun -- 08:05 PM PDT     -1.35 knots Max Ebb
Sun -- 11:23 PM PDT     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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0.81.11.10.90.4-0.1-0.5-0.8-1-0.9-0.7-0.20.30.70.70.50.1-0.4-0.9-1.2-1.3-1.2-0.9-0.3

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 (0,6,7,8)
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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.