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Marine Weather and Tides Cohassett Beach, 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 6:17AM

Sunset 8:19PM

Tuesday August 20, 2019 5:25 PM PDT (00:25 UTC)

Moonrise 9:51PM

Moonset 10:20AM

Illumination 72%

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 Cohassett Beach, WA

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Area Discussion for - Seattle, WA

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Fxus66 ksew 202214 afdsew area forecast discussion national weather service seattle wa 314 pm pdt Tue aug 20 2019 Synopsis An upper level ridge over the pacific northwest will slide east through this afternoon as a front approaches the area. The front will spread rain across western washington tonight through Wednesday. Dry weather by Thursday afternoon with a weak high pressure over the area. A series of systems will pass generally to our north Friday into the weekend keeping temperatures near normal and bringing a chance of showers mainly to the coast and northern areas. Short term tonight through Friday Satellite imagery shows high clouds over western washington this afternoon ahead of the next frontal system. Dry weather through this evening as the upper level ridge slides east. Temperatures generally in the 70s to low 80s currently with a few mid 80s by this afternoon. A fairly potent weather system near 45n 132w will move northeast and track into the central b.C. Coast tonight. The front will slide onshore a bit quicker than expected with showers chances along the coast tonight pushing eastward into the puget sound area by daybreak. Models still fluctuate on QPF amounts, but most generally in the range of a quarter of an inch to possibly a half inch in spots around the sound with around an inch along the coast. The front will move quickly through western washington and weaken over the cascades by evening. Mesoscale models highlight the possibility for the development of a convergence zone over snohomish king counties Wednesday night into early Thursday morning. Drier weather expected with some sunshine by Thursday afternoon as a weak area of high pressure builds over the area. Temperatures will be cooler on Wednesday with highs in the 60s with temperatures into the mid 70s on Thursday. The upper level ridge over the area Thursday will become flattened by Friday with the approach of another upper level trough. Although the bulk of the energy with this system will generally be north of the area, there will be a few showers possible across the northern tier on Friday. Temperatures on Friday will be in the mid 60s to mid 70s across the area. Jd Long term Saturday through Tuesday Another weather system north of the area looks to bring a chance for pops on Saturday with the GFS being a bit drier than the ecmwf. Onshore flow expected through the weekend with temperatures near normal. Guidance does suggest high pressure aloft building into the area on Monday. Pattern change is possible heading into the middle of next week if the current trends are maintained with higher

amplitude ridging over the pacific northeast and warmer temperatures. Jd Aviation An approaching frontal system has brought fairly widespread mid and high level clouds this afternoon. Expect increasing low level southerly flow most areas ahead of the front late tonight. The front will reach the coast after midnight with low clouds and rain spreading inland through the morning. Conditions will remainVFR overnight with ceilings lowering to MVFR levels along the coast after 06z followed by much of the interior 14-16z. Ifr conditions are possible Wednesday morning at some locations as rain moves onshore and inland. Ksea... Mid and high level clouds withVFR conditions through tonight. Ceilings will to MVFR levels after daybreak with rain as a cold front moves into the central puget sound. Southwesterly winds 2 to 6 kt becoming 8 to 10 kt after 06z. Marine Southerly winds over most waters tonight with weak onshore flow through the strait. Increasing southerlies ahead of the front will result in small craft advisory conditions most waters as the front moves into the area tonight and Wednesday morning. Onshore flow and westerlies will follow behind the front through the remainder of the week with periods of small craft conditions possible in the central and eastern strait. A weak front will brush the area later Friday and Saturday with minimal affect on the winds. 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 until 11 am pdt Wednesday 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 from 11 pm this evening to 5 pm pdt Wednesday for admiralty inlet-northern inland waters including the san juan islands. Small craft advisory from 6 pm this evening to 4 am pdt Wednesday for central u.S. Waters strait of juan de fuca. Small craft advisory from midnight tonight to 10 am pdt Wednesday for puget sound and hood canal.

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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	2 mi	50 min	SSW 9.9 G 15	64°F	59°F		1014.4 hPa
46211 - Grays Harbor, WA (036)	9 mi	56 min			64°F	3 ft
TOKW1 - 9440910 - Toke Point, WA	13 mi	56 min	SW 8.9 G 13		64°F		1014.9 hPa
46099	27 mi	156 min	S 12	64°F			1013.6 hPa
46243 - Clatsop Spit, OR - 162	46 mi	26 min			58°F	3 ft
46100	47 mi	156 min	SSE 12	63°F	62°F		1013.3 hPa
46041 - CAPE ELIZABETH- 45NM Northwest of Aberdeen, WA	48 mi	36 min	SSE 12 G 14	62°F	60°F	3 ft	1013.7 hPa (+0.0)
46096	49 mi	106 min	S 16 G 16	61°F	63°F		1014.4 hPa
ASTO3 - 9439040 - Astoria, OR	49 mi	56 min	SW 8 G 17	67°F	70°F		1014.6 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	9 mi	93 min	WSW 11	7.00 mi	A Few Clouds	69°F	57°F	66%	1014.8 hPa

Link to 5 minute data for KHQM

Wind History from HQM (wind in knots)

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Tide / Current Tables for Bay City, Tillamook Bay, Oregon

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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 (20,4,5,8)

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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.