Marine Weather Net

Cape Flattery to James Island WA out 10 NM Marine Forecast


TONIGHT

S
WINDS
25 - 30
KNOTS

TUE

SW
WINDS
25 - 30
KNOTS

TUE NIGHT

W
WINDS
20 - 30
KNOTS

WED

W
WINDS
10 - 20
KNOTS

The Marine Weather Forecast In Detail:
PZZ150 Forecast Issued: 813 PM PST Mon Feb 06 2023

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
Tonight...S Wind 25 To 30 Kt. Wind Waves 5 To 7 Ft. W Swell 8 Ft At 9 Seconds Building To 12 Ft At 11 Seconds After Midnight. Rain.
Tue...Sw Wind 25 To 30 Kt Becoming W 20 To 30 Kt In The Afternoon. Wind Waves 7 To 8 Ft Subsiding To 4 To 6 Ft In The Afternoon. W Swell 14 Ft At 13 Seconds. Rain In The Morning Then Showers And A Slight Chance Of Tstms In The Afternoon.
Tue Night...W Wind 20 To 30 Kt Easing To 15 To 25 Kt After Midnight. Wind Waves 5 To 7 Ft Subsiding To 3 To 5 Ft After Midnight. W Swell 15 Ft At 12 Seconds Subsiding To 13 Ft At 12 Seconds After Midnight. A Slight Chance Of Tstms In The Evening. Showers.
Wed...W Wind 10 To 20 Kt Becoming Sw To 10 Kt In The Afternoon. Wind Waves 1 To 3 Ft Subsiding To 1 Ft Or Less In The Afternoon. W Swell 14 Ft At 13 Seconds Subsiding To 12 Ft At 12 Seconds In The Afternoon.
Wed Night...S Wind 5 To 15 Kt Becoming Se 15 To 25 Kt After Midnight. Wind Waves 2 Ft Or Less Building To 2 To 4 Ft After Midnight. W Swell 9 Ft At 12 Seconds.
Thu...E Wind 15 To 25 Kt Becoming Se 20 To 25 Kt In The Afternoon. Wind Waves 3 To 5 Ft. W Swell 8 Ft At 12 Seconds.
Thu Night...Se Wind 20 To 30 Kt Becoming S 15 To 25 Kt After Midnight. Wind Waves 4 To 6 Ft Subsiding To 2 To 4 Ft After Midnight. Sw Swell 10 Ft At 13 Seconds.
Fri...S Wind 15 To 20 Kt Becoming W 5 To 15 Kt. Wind Waves 1 To 3 Ft. W Swell 11 Ft Building To 13 Ft.
Sat...Sw Wind 5 To 15 Kt. Wind Waves 1 To 2 Ft. W Swell 9 Ft Subsiding To 6 Ft.
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Area Forecast Discussion
National Weather Service Seattle WA
751pm PST Monday Feb 6 2023

Synopsis
A vigorous frontal system will bring lowland rain, mountain snow, and windy conditions to Western Washington tonight through Tuesday. Showers linger Wednesday as a trough moves through the region. High pressure will provide drier conditions much of Thursday before a weak front arrives on Friday. Unsettled conditions will then persist into the weekend.

Short Term - Tonight Through Thursday
South winds will increase tonight and into Tuesday morning with a warm front. Highest winds will be in the North Interior where gusts to 40-50 MPH are possible - a Wind Advisory is in effect. Elsewhere, expect gusts in the 30-40 MPH range with winds peaking mid-morning. Otherwise, precipitation will be filling in tonight and winter weather headlines remain in place for the Cascades. In addition, heavy rain in the Olympics will force sharp rises on the Skokomish River in Mason county and a Flood Watch remains in effect. 33

Previous discussion...Snow levels will initially make a jump with the arrival of the warm front early Tuesday, but will tumble behind a trailing cold front as it pushes through Puget Sound around midday Tuesday. Modest instability will follow the front for a slight chance of thunderstorms coastal areas.

Strong post-frontal onshore flow should get a convergence zone going late Tuesday afternoon through Tuesday night before it eventually dissipates in the Cascades Wednesday morning as onshore gradients gradually relax. Winter storm criteria snowfall looks likely for the North Cascades with 1 to 2 feet expected in the Mount Baker area. Further south, amounts look a little lighter, but the post-frontal environment will be favorable for 8-12 inches at Snoqualmie Pass by early Wednesday and 14-18 inches at Stevens. There is one caveat to be aware of though. If the convergence sets up for an extended period over the passes Tuesday night, these totals could easily be adjusted upward.

Weak ridging aloft will build into the area Wednesday afternoon into early Thursday for a drying trend across the area. Thursday looks dry for most of Western Washington with the exception of the Olympic Peninsula where some light precipitation could arrive by evening ahead of a weak front. Temperatures through the short term forecast period will be a couple degrees either side of seasonal averages for early February.

Long Term - Friday Through Monday
Models remain fairly consistent with the arrival of another frontal system on Friday. However, deterministic solutions as well as a number of ensembles show the front rapidly splitting upon arrival. Upper ridging attempts to establish itself just offshore over the weekend, but Western Washington remains on the northern periphery of the ridge with at least chance Probability of Precipitation as weak systems brush the area. More uncertainty begins to emerge in the forecast early next week with a considerable spread in the 500mb cluster plots. This isn't terribly surprising with a cut-off upper low over the Desert Southwest greatly affecting what may...or may not...happen upstream over the Pacific Northwest. 27

Marine
A front will move across the area through early Tuesday afternoon. Increasing southerly winds through Tuesday morning with the front. Gale force winds are likely for the northern interior waters, as well as eastern entrance to the Strait of Juan de Fuca and Admiralty Inlet. The Coastal Waters may also see some marginal gale force winds into Tuesday morning. SCA (Small Craft Advisory) winds for most other area waters.

Onshore flow will increase following the cold front on Tuesday afternoon and ease Wednesday. Gale force winds are likely for the central and eastern Strait of Juan de Fuca, as well as Admiralty Inlet during this period. Winds taper off a bit on Wednesday. Another weakening front will move through Thursday and Friday.

Seas will build over the Coastal Waters to 12 to 16 feet tonight and remain generally in that range through Wednesday before subsiding to below 10 feet Wednesday night and Thursday. Seas will build to 12 to 16 feet again for the coast on Friday. JD

Hydrology
A flood watch remains in effect for Mason County from Tuesday morning through Wednesday as heavy rain centered over the region may lead to flooding on the Skokomish River. The river is currently forecast to rise above flood stage toward midday Tuesday and briefly reach moderate flood stage by Tuesday evening. Elsewhere, river flooding is not expected through the week ahead.

NOAA Seattle WA Office: Watches - Warnings - Advisories
WA...Wind Advisory until 10am PST Tuesday for Admiralty Inlet Area- San Juan County-Western Skagit County-Western Whatcom County.

Flood Watch from 7am PST Tuesday through Wednesday morning for Hood Canal Area-Lower Chehalis Valley Area-Olympics.

Winter Storm Warning from 4am Tuesday to 10am PST Wednesday for West Slopes North Cascades and Passes.

Winter Weather Advisory from 4am Tuesday to 10am PST Wednesday for West Slopes North Central Cascades and Passes-West Slopes South Central Cascades and Passes.

PZ...Small Craft Advisory until 3pm PST Tuesday for
Grays Harbor Bar

Small Craft Advisory until 4am PST 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-
Puget Sound and Hood Canal
West Entrance USA Waters Strait Of Juan De Fuca.

Small Craft Advisory until 4am PST Tuesday for
Central U.S. Waters Strait Of Juan De Fuca.

Gale Warning from noon Tuesday to 4am PST Wednesday for
Central U.S. Waters Strait Of Juan De Fuca.

Gale Warning until 4am PST Tuesday for
Admiralty Inlet
East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Watch from Tuesday afternoon through late Tuesday night for
East Entrance U.S. Waters Strait Of Juan De Fuca.

Gale Warning until 8am PST Tuesday for
Northern Inland Waters Including The San Juan Islands.

Gale Watch from Tuesday afternoon through Tuesday evening for Admiralty Inlet.