Wednesday, February24, 2021
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Marine Weather and Tides
Cohassett Beach, WA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:01AMSunset 5:55PM Wednesday February 24, 2021 9:26 AM PST (17:26 UTC) Moonrise 2:48PMMoonset 6:02AM Illumination 95% Phase: Waxing Gibbous; Moon at 13 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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PZZ110 Grays Harbor Bar- 826 Am Pst Wed Feb 24 2021
.small craft advisory in effect until 4 pm pst this afternoon... Combined seas 10 to 11 feet subsiding to 9 feet tonight. Bar conditions rough, becoming moderate tonight. Maximum ebb currents will be around 230 pm this afternoon and 300 am tonight.
PZZ100 826 Am Pst Wed Feb 24 2021
Synopsis for the northern and central washington coastal and inland waters..Light offshore flow will prevail today. A vigorous frontal system will move through the area tonight and Thursday, producing hazardous winds and seas across offshore and inland waters through Friday. Conditions gradually improving this weekend.


7 Day Forecast for Marine Location Near Cohassett Beach, WA
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location: 46.88, -124.08     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 241704 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 900 AM PST Wed Feb 24 2021

SYNOPSIS. A break in the weather today will be short-lived and the next front will reach Western Washington tonight. Strong onshore flow will give periods of heavy mountain snow Thursday and Friday. There will be a break in the weather on Saturday. A weak warm front will reach the area Sunday followed by a cold front Sunday night.

SHORT TERM /TODAY THROUGH FRIDAY/. Most of Western Washington will have sunshine today after some areas of morning low clouds and fog. High clouds will increase, highs will be in the 40s. The next front will reach Western Washington overnight, with a fropa around daybreak. There are gale warnings and wind advisories in the normally windier spots. A winter storm watch is up for the Cascades, and periods of heavy mountain snow are likely from Thursday morning through Friday night. And with westerly flow in the wake of the front we ought to see the convergence zone wax and wane. Seas could build to around 20 feet along the coast by daybreak Friday. 19

LONG TERM /SATURDAY THROUGH TUESDAY/. Showers from the aforementioned system will linger into early Saturday, before tapering. Conditions then look to dry as upper level ridging traverses the region. There remains uncertainty in deterministic and ensemble guidance regarding the extent of the drier weather, however, as guidance does indicate some weaker systems riding the ride and making their way into the area by early next week. Have kept a chance of POPs in the forecast, however will have to see how the forecast evolves over the next several days. 14

AVIATION. High pressure and offshore flow will bring dry and stable conditions to western W today. The flow aloft is northerly. Low clouds and fog are mainly near Puget Sound this morning but will scatter and erode this afternoon for VFR conditions. Rain with our next system will reach the coast after 06z tonight then spread inland by 12z. Gusty S/SW winds expected through Thursday with this system. 33

KSEA . Low clouds in the vicinity this morning with possible MVFR cigs, then becoming VFR this afternoon. Winds generally 5 kt or less. 33

MARINE. Seas will remain around 10-14 today over the Coastal Waters and West Entrance. Otherwise, expect generally light offshore winds as high pressure moves in.

Southerly flow will increase tonight ahead of our next incoming system. This system will likely bring gales on Thursday with another strong onshore push Thursday night. Strong post-frontal onshore flow will continue into Friday with seas building to 20-25 feet. Winds and seas will ease/subside over the weekend. 33

HYDROLOGY. The lowest reaches of the Chehalis River have continued to rise overnight, so have kept the flood watch for Grays Harbor County going. The crest at Porter may be very close to flood stage late this morning, but is expected to gradually recede throughout the remainder of the day. Additional precipitation arrives tonight into Thursday, but with modest amounts and relatively low snow levels, no additional river flooding is expected at this time. 14

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Watch from this evening through Friday evening for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties.

Wind Advisory from 1 AM to 10 AM PST Thursday for Admiralty Inlet Area-San Juan County-Western Skagit County-Western Whatcom County.

Flood Watch through Thursday afternoon for Central Coast-Lower Chehalis Valley Area-Olympics.

Wind Advisory from 10 PM this evening to 7 AM PST Thursday for Central Coast-North Coast.

Winter Weather Advisory from 10 PM this evening to 10 AM PST Friday for Olympics.

PZ . Small Craft Advisory until 4 PM PST this afternoon for Grays Harbor Bar.

Gale Watch from Thursday afternoon through Friday morning for Central U.S. Waters Strait Of Juan De Fuca-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-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 1 PM PST Thursday 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-West Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Watch from this evening through Friday morning for Admiralty Inlet-East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Watch from this evening through Thursday afternoon for Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory from 10 PM this evening to 1 PM PST Thursday for Central U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 1 AM to 4 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
WPTW1 - 9441102 - Westport, WA 2 mi50 min ESE 6 G 6 37°F 47°F1035.8 hPa
46211 - Grays Harbor, WA (036) 9 mi60 min 47°F10 ft
TOKW1 - 9440910 - Toke Point, WA 13 mi56 min E 5.1 G 6 38°F 47°F1035.7 hPa
46243 - Clatsop Spit, OR - 162 46 mi60 min 46°F8 ft
46041 - CAPE ELIZABETH- 45NM Northwest of Aberdeen, WA 48 mi46 min SSE 14 G 19 47°F1034.9 hPa
ASTO3 - 9439040 - Astoria, OR 49 mi56 min SE 5.1 G 6 34°F 43°F1035.2 hPa

Wind History for Westport, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA9 mi33 minE 610.00 miFair35°F34°F96%1036.1 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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Bay City
Click for Map
Wed -- 05:07 AM PST     2.95 feet Low Tide
Wed -- 06:02 AM PST     Moonset
Wed -- 07:04 AM PST     Sunrise
Wed -- 10:32 AM PST     7.20 feet High Tide
Wed -- 02:48 PM PST     Moonrise
Wed -- 05:55 PM PST     Sunset
Wed -- 06:11 PM PST     -0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.55.24.63.93.22.93.245.26.37.17.16.65.64.12.61.20.2-0.3012.445.2

Tide / Current Tables for Grays Harbor Entrance, Washington Current
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Grays Harbor Entrance
Click for Map
Wed -- 02:28 AM PST     -1.61 knots Max Ebb
Wed -- 04:59 AM PST     0.00 knots Slack
Wed -- 06:03 AM PST     Moonset
Wed -- 07:04 AM PST     Sunrise
Wed -- 07:59 AM PST     1.34 knots Max Flood
Wed -- 10:46 AM PST     -0.01 knots Slack
Wed -- 02:38 PM PST     -3.32 knots Max Ebb
Wed -- 02:48 PM PST     Moonrise
Wed -- 05:55 PM PST     Sunset
Wed -- 06:05 PM PST     0.00 knots Slack
Wed -- 09:35 PM PST     2.12 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-1.1-1.5-1.5-0.900.81.21.31.20.8-0.3-1.6-2.6-3.2-3.3-2.6-1.4-0.111.722.11.5

Weather Map
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GEOS Local Image of PacificNorthwest    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




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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.