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Marine Weather and Tides Markham, WA Version 3.4

NOTICE 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

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Sunrise 6:21AM

Sunset 8:14PM

Friday August 23, 2019 6:23 AM PDT (13:23 UTC)

Moonrise 11:14PM

Moonset 1:36PM

Illumination 45%

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 Markham, WA

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Area Discussion for - Seattle, WA

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Fxus66 ksew 231028 afdsew area forecast discussion national weather service seattle wa 328 am pdt Fri aug 23 2019 Synopsis A weak upper level trough will move over western washington today and remain into Saturday. A weak system will move by to the north today with a second weak system dissipating before it reaches the area on Saturday. An upper level ridge will build into the area Sunday through the middle of next week. Low level offshore flow Tuesday through Thursday will give the area well above normal high temperatures. Short term today through Sunday Satellite imagery shows weak weather system approaching the area from the northwest early this morning. Clouds out ahead of the feature have reached the central portion of vancouver island as of 3 am 10z. Mostly clear skies over western washington with some patchy fog developing between puyallup and olympia. Temperatures at 3 am were mostly in the 50s. System offshore will continue to weaken and lift a little north today. For most of the area just an increase in cloud cover this morning ( photographers alert, could be a colorful sunrise ) with the mostly cloudy skies continuing into the afternoon hours. There is a slight chance of showers near the canadian border later today. Highs with the cloud cover will be in the mid 60s to mid 70s. A little break between systems tonight with another weak system dissipating before it moves into the area on Saturday. This system will have a little more southerly track to it with the remnants moving into western washington during the day on Saturday. Will keep a slight chance of showers west of puget sound in the forecast. Lows tonight will be in the 50s. Highs on Saturday with the cloud cover will continue to be a little below normal, in the mid 60s to mid 70s. Low level onshore flow continuing Saturday night into Sunday with northwesterly flow aloft. Upper level ridge beginning to build offshore Sunday afternoon. Even with more sunshine on Sunday the low level onshore flow will keep highs in the upper 60s to upper 70s. Lows Saturday night in the 50s. Long term Monday through Thursday Extended models remain in good agreement with an upper level ridge building over the area Monday and Tuesday and remaining over the area Wednesday. The ecmwf weakens the ridge on Thursday while the GFS and the ensembles keep the ridge solidly over the area. Low level flow turning offshore on Tuesday and remaining offshore through Thursday. Model 850 mb temperatures in the plus 16 to plus 20c range for Wednesday and Thursday. Plus 20c at 850 with low level offshore flow brings up the possibility of lower 90s but with the models trending a little cooler with the 850 mb temperatures will

keep the high end of the MAX temps for now in the upper 80s Wednesday and Thursday. Felton Aviation A broad upper trough will settle over the area today and tonight. A weak disturbance in the westerly flow aloft will brush the northern part of the area today. A second weak frontal system will dissipate off the coast tonight. At the surface, onshore will continue with high pressure offshore and lower pressure inland. The air mass is mostly dry and stable. There will be areas of low clouds this morning but nothing too widespread under weak low level onshore flow. The low clouds that are around this morning should burn off my afternoon. Otherwise, there will be high clouds today and maybe some mid clouds at times over the north part of the area as a weak weather system brushes the area. Low and mid clouds should increase again west of puget sound - mostly near the coast - as a second weak front approaches from the west and dissipates offshore. Ksea... There is an area of 3000-4000 foot ceilings east of the terminal that will be close at times but is not expected to produce a ceiling at the TAF site. There is also a small chance some stratus could form in place this morning under weak onshore flow but the most likely scenario is just high clouds today. Mid clouds will likely increase tonight as a weak front dissipates to the west. Light wind will become northerly 4-8 knots this afternoon. Schneider Marine A weak weather system will brush the north part of the area today. A second weak cold front will dissipate over the coastal waters tonight and Saturday. Otherwise, onshore flow will continue through early next week with high pressure offshore and lower pressure inland. Small craft advisory strength west winds are likely in the central and eastern strait of juan de fuca each night for the next few days. Winds could rise to gale force in the strait Saturday evening but confidence is not high enough for a watch yet. Low level flow will turn offshore next Tuesday as a thermal trough builds north along the west coast. Schneider Hydrology The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed until then. Sew watches warnings advisories Wa... None. Pz... Small craft advisory from 4 pm this afternoon to 3 am pdt Saturday for central u.S. Waters strait of juan de fuca- east entrance u.S. Waters strait of juan de fuca.

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WPTW1 - 9441102 - Westport, WA	6 mi	48 min	N 5.1 G 8	57°F	63°F		1015.6 hPa
46211 - Grays Harbor, WA (036)	13 mi	54 min			63°F	4 ft
TOKW1 - 9440910 - Toke Point, WA	13 mi	54 min	NNE 1.9 G 4.1	56°F	65°F		1016 hPa
46243 - Clatsop Spit, OR - 162	47 mi	54 min			63°F	4 ft
ASTO3 - 9439040 - Astoria, OR	49 mi	54 min	E 2.9 G 5.1	57°F	69°F		1015.1 hPa

Wind History for Westport, WA

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Hoquiam, Bowerman Airport, WA	6 mi	31 min	N 3	8.00 mi	Fair	52°F	52°F	100%	1016.4 hPa

Link to 5 minute data for KHQM

Wind History from HQM (wind in knots)

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Tide / Current Tables for Markham, Grays Harbor, Washington

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Tide / Current Tables for Grays Harbor Entrance, 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 (9,2,3,4)

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Ground Weather Radar Station Portland, OR

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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.