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Marine Weather and Tides Cohassett Beach, WA Version 3.4

NOTICE 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. 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 7:49AM

Sunset 4:28PM

Thursday December 12, 2019 12:59 PM PST (20:59 UTC)

Moonrise 5:09PM

Moonset 8:17AM

Illumination 99%

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 121714 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 915 AM PST Thu Dec 12 2019

SYNOPSIS. A frontal system will move through Western Washington today followed by a cool upper level trough Friday and Saturday. A weak warm front may result in some areas of light rain on Sunday. Upper level ridging will likely support a dry start to next week followed by a more active weather late in the week.

SHORT TERM /TODAY THROUGH SATURDAY/. Rain with mountain snow above about 3500 feet today as a front continues to work onshore. There has been just enough instability over the coastal waters this morning to support a few lightning strikes - so the forecast has been updated to include mention of that through the evening hours, this will include the coast during the afternoon. For remainder of the lowlands today scattered showers this morning will become a bit more organized this afternoon as the front moves into the area.

Snow levels over the mountains will linger in the 3500 to 4000 foot range today. Precipitation in the mountains will continue to be showery this morning with more steady precipitation expected ahead of and with the the front as it moves east this afternoon. Snow levels will dip closer to 3000 feet overnight with the cooler air behind the front - at the same time, showers should begin to trend downward. Accumulations will remain possible through Friday afternoon - but should be on the diminishing end of the spectrum.

Overall hower activity decreasing Friday afternoon with highs on a couple of degrees cooler, mostly in the mid to upper 40s. The upper level trough will linger over the area Friday night into Saturday keeping showers in the forecast. Lows in the upper 30s and 40s. Highs in the mid and upper 40s.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. from previous discussion . Not a lot of confidence in the extended forecast. Operational models are trending toward a drier forecast for the first part of next week while the ensembles and the model blends are not having any part of it. With the uncertainty in the models have left broad brush chance pops in the forecast through Tuesday. Models continuing with the inconstant solutions late in the period with the 00z runs keeping the split flow pattern intact keeping the front that was timed into the area on Wednesday out of the area. Will continue with the mostly chance pops for Wednesday and Thursday as well. Felton

AVIATION. Westerly flow aloft continues today as a broad upper trough remains over the northeast Pacific. The air mass is moist and somewhat unstable. A secondary frontal system will shift onshore across Western Washington this morning with a mix of VFR and MVFR ceilings in showers. Some rain shadowing by the Olympics could keep ceilings in the VFR category for central Puget Sound terminals part of the day. Low level flow will be S-SW with surface winds gusting to around 20-25 knots near the front as moves inland.

KSEA . Shower coverage will increase through the morning as another frontal system moves into the region. Ceilings will dip to MVFR in and around heavier showers. Surface winds S-SW 10 to 15 knots gusting 20-25 knots with the passage of the front this afternoon.

27

MARINE. A robust frontal boundary will continue to make eastward progress this morning across the western Washington marine waters. An unstable air mass will produce isolated thunderstorms with the main threat being lightning. Small craft advisory winds will continue across most of the waters today. Winds are the expected to ease this afternoon into the evening hours. However, swell will remain high across the Coastal Waters so will keep SCA going for this area all the way into Saturday. Swells are expected to increase to between 17-18ft thru the day Thursday and remain in the 14-16ft range through Friday into early Saturday. Swells will also present hazardous surf conditions along the Washington Coast on Thursday so the High Surf Advisory will remain in effect into Friday.

Hazardous weather conditions over the waters are expected to subside by the latter half of the weekend.

Kovacik/27

HYDROLOGY. Relatively low snow levels and limited precipitation amounts today and Friday will result in little or no impacts on area rivers. There are no flooding concerns at this time. Saturday through the middle of next week river flooding is not expected.

SEW WATCHES/WARNINGS/ADVISORIES. WA . Winter Storm Warning until 10 AM PST Friday for Cascades of Pierce and Lewis Counties-Cascades of Snohomish and King Counties-Cascades of Whatcom and Skagit Counties.

High Surf Advisory until 10 AM PST Friday for Central Coast- North Coast.

Winter Weather Advisory until 9 PM PST this evening for Olympics.

PZ . Small Craft Advisory until 10 AM PST Saturday 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-Grays Harbor Bar-West Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory until 5 PM PST this afternoon for East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands-Puget Sound and Hood Canal.



www.weather.gov/seattle

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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	84 min	S 12 G 18	47°F	48°F		1010.9 hPa
46211 - Grays Harbor, WA (036)	9 mi	30 min			48°F	17 ft
TOKW1 - 9440910 - Toke Point, WA	13 mi	60 min	S 16 G 18	48°F	48°F		1011.5 hPa (-0.8)
46243 - Clatsop Spit, OR - 162	46 mi	30 min			49°F	17 ft
46100	47 mi	190 min	SW 16	52°F	52°F		1009 hPa
46041 - CAPE ELIZABETH- 45NM Northwest of Aberdeen, WA	48 mi	70 min	SSW 9.7 G 14	51°F	49°F	14 ft	1009.1 hPa (-0.6)
ASTO3 - 9439040 - Astoria, OR	49 mi	60 min	S 7 G 12	48°F	46°F		1012.2 hPa (-1.4)

Wind History for Westport, WA

(wind in knots)    EDIT      (on/off)   Help

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S11 G20

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1 day ago

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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	67 min	S 15	10.00 mi	Overcast	48°F	46°F	93%	1011.4 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

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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

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Wind Forecast for Seattle, WA (16,3,4,5)

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Ground Weather Radar Station Portland, OR

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