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Marine Weather and Tides Artondale, WA Version 3.4

What's New / NOTES 10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

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Sunrise 7:21AM

Sunset 4:30PM

Tuesday November 20, 2018 3:16 AM PST (11:16 UTC)

Moonrise 3:41PM

Moonset 4:06AM

Illumination 93%

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.

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7 Day Forecast for Marine Location Near Artondale, WA

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Area Discussion for - Seattle, WA

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Fxus66 ksew 200456 afdsew area forecast discussion national weather service seattle wa 856 pm pst Mon nov 19 2018 Synopsis High pressure will provide one more dry day across the region Tuesday. A series of low pressure systems will bring wet weather Wednesday through Friday. After a break between systems on Saturday, a weak front could bring some light rain Sunday. Short term Low clouds and fog were developing over the lowlands sooner than predicted, so the forecast was updated earlier to account for this. Also, the forecast was updated to expand the areal coverage of the fog low stratus overnight into Tuesday morning. Otherwise there are no major changes to the previous forecast thinking. Models generally agree that light rain reach the coast early Wednesday morning, then spread into the rest of western washington by midday. This first front will be the weakest as it encounters the ridge pushing eastward. QPF amounts look rather light, perhaps a third of an inch over the mountains and about half that over the lowlands. Snow levels may start just above pass levels but will fall later Wednesday and Wednesday night down to at least 4000 feet. This could allow a couple inches of snow to fall at some passes such as stevens pass, and white pass. Ski areas may pick up several inches but likely sub-advisory level. The next system arrives for thanksgiving with steady rain picking up during the afternoon. This front will have significantly more moisture to work with and better lift, both dynamic and orographic. Snow levels will fall, probably down to all mountain passes by afternoon. Models still show a split flow pattern with the heaviest precipitation again headed into ca and oregon. There is a strong orographic push with onshore flow behind the front, and this would be the likely be the period of heaviest snowfall. An advisory could be necessary, but with the split flow and progressive push through the region, snow amounts in the passes come up just short of advisory level. It will become breezy with this system as well, but gradients do not support strong or damaging winds. However, visibility in the passes could be reduced with snowy pass conditions at times. Long term from the prev discussion Snow levels will lower to around 2500 feet Thursday night into Friday. Additional snow is likely, and accumulations in the passes will probably cause travel difficulty through passes. Those planning travel through mountain passes Wednesday through this weekend should pay close attention to current forecasts and check on road conditions by calling 5-1-1 before departing. Snow will taper to snow showers in the mountains Friday afternoon and night. Cool and showery conditions will affect the lowlands. The puget sound convergence zone could become active as well. 1000-850mb thickness values are not as low as might be expected with the -31c

cold pool overhead at 500mb. Low elevation snow does not appear to be a concern at this time. A break in precipitation is expected for Saturday. The GFS and ecmwf both show this brief dry period. Both models also bring a weak front into the area Saturday night and Sunday with a round of light rain and mountain snow. Rain amounts should not be more than a couple tenths at best given the progressive flow pattern. The progressive flow pattern continues into early next week. This makes timing individual fronts difficult. Wet weather is shown by the ECMWF returning by late Monday and Monday night, while the gfs holds rain off until Tuesday. Either way, expect unsettled weather and timing can be refined as we get closer to the day 6-7 period. Mercer Aviation High pres aloft will remain over the region overnight. The flow aloft will be sly. This will result in a thin elevated layer of wildfire smoke to drift N across the area. The low level flow will remain light ely. Expect areas of lifr CIGS vsbys over mainly the interior lowlands overnight. Ksea... Expect fog and low ceilings (at or below 500 ft) to develop overnight. The visibility should lower into the 1-3sm range by sunrise, with the visibility occasionally lowering to a half mile Tuesday morning. There is a 30 percent chance that the visibility will drop as low as a quarter of a mile Tuesday morning. There is also a chance that ceilings visibilities will improve slower than forecast. Winds will generally be light and variable. Marine High pressure over id with lower pressure offshore will keep the flow mainly easterly (offshore) through Tuesday. A weakening cold front extending from a 998 mb low will approach from the west Tuesday night. This front will move across the wa coastal waters on Wednesday, and then mostly dissipate as it moves onshore. Regarding the Thursday Friday system: confidence in the forecast was still low because of lack of agreement between the weather models. The current wind forecast reflects the stronger GFS model solution. Most solutions were weaker with the Thursday Friday system. Will probably lean in this direction with the issuance of the early morning forecast, especially if most or all of the models stay with a weaker solution. Hydrology River flooding is not anticipated the next 7 days; however, there will be some rises on area rivers the end of this week or early next week. Sew watches warnings advisories Wa... None. Pz... None.

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
46121	4 mi	18 min		42°F			1016.9 hPa	42°F
TCMW1 - 9446482 - Tacoma Met, WA	12 mi	35 min	SE 1.9 G 1.9
TCNW1 - 9446484 - Tacoma, WA	13 mi	35 min		35°F	53°F		1017.6 hPa
46123	20 mi	181 min			51°F
EBSW1 - 9447130 - Seattle, WA	28 mi	29 min	SSE 1.9 G 2.9		52°F		1017.2 hPa
WPOW1 - West Point, WA	29 mi	77 min	Calm G 1	43°F			1017.5 hPa (+0.0)	42°F
46120	36 mi	19 min	NE 1.9	43°F			1016.1 hPa	41°F
46125	43 mi	166 min			51°F

Wind History for Tacoma MET, WA

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Tacoma, Tacoma Narrows Airport, WA	4 mi	24 min	N 0	0.25 mi	Fog	39°F	39°F	100%	1017 hPa
Tacoma / McChord Air Force Base, WA	12 mi	79 min	N 0	10.00 mi	Fair	28°F	28°F	100%	1017.5 hPa
Fort Lewis / Gray U. S. Army Airfield, WA	14 mi	79 min	SE 5	10.00 mi	Fair	30°F	30°F	100%	1017.5 hPa
Bremerton, Bremerton National Airport, WA	15 mi	21 min	N 0	10.00 mi	Fair	29°F	28°F	100%	1018.6 hPa
Seattle, Seattle-Tacoma International Airport, WA	21 mi	24 min	WNW 3	0.25 mi	Fog	38°F	37°F	97%	1017.5 hPa
Pierce County-Thun Field, WA	23 mi	42 min	N 0	6.00 mi	Fog/Mist	30°F	30°F	100%	1016.6 hPa

Wind History from TIW (wind in knots)

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Tide / Current Tables for Arletta, Washington

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Tide / Current Tables for Hale Passage, West end, Washington Current

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Weather Map and Satellite Images

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GOES 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

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Wind Forecast for Seattle, WA (6,6,7,8)

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Ground Weather Radar Station Seattle/Tacoma, WA

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Disclaimer: 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.