West Entrance U.S. Waters Strait of Juan de Fuca Marine Forecast
| Today...E Wind 15 To 20 Kt, Backing To Nw Late This Morning, Then Becoming W 20 To 25 Kt With Gusts Up To 35 Kt This Afternoon. Seas 8 To 11 Ft. Wave Detail: Nw 3 Ft At 4 Seconds, E 2 Ft At 5 Seconds And W 11 Ft At 16 Seconds. Rain This Morning, Then A Chance Of Showers Early This Afternoon. Showers Likely Late. |
| Tonight...W Wind 20 To 25 Kt With Gusts Up To 35 Kt, Becoming Sw 15 To 20 Kt After Midnight. Seas 7 To 10 Ft. Wave Detail: Sw 2 Ft At 7 Seconds And W 10 Ft At 14 Seconds. Showers. |
| Sun...Sw Wind 10 To 15 Kt, Easing To 5 To 10 Kt In The Afternoon. Seas 5 To 8 Ft. Wave Detail: W 8 Ft At 14 Seconds. Showers Likely, Mainly In The Morning. |
| Sun Night...Se Wind 5 To 10 Kt, Becoming E 10 To 15 Kt After Midnight. Seas 5 To 7 Ft. Wave Detail: W 7 Ft At 14 Seconds. |
| Mon...E Wind 10 To 15 Kt. Seas 5 To 8 Ft. Wave Detail: E 3 Ft At 5 Seconds And W 8 Ft At 13 Seconds. A Chance Of Rain In The Afternoon. |
| Mon Night...E Wind 15 To 20 Kt. Seas 5 To 7 Ft. Wave Detail: E 5 Ft At 6 Seconds And W 7 Ft At 13 Seconds. A Chance Of Rain In The Evening, Then Rain Likely After Midnight. |
| Tue...E Wind 15 To 20 Kt. Seas 5 To 7 Ft. Wave Detail: E 5 Ft At 6 Seconds And W 5 Ft At 12 Seconds. Rain Likely. |
| Tue Night...E Wind 25 To 30 Kt. Seas 5 To 7 Ft, Building To 7 To 10 Ft After Midnight. Wave Detail: E 10 Ft At 8 Seconds And W 3 Ft At 13 Seconds. Rain. |
| Wed...Se Wind 25 To 30 Kt. Seas 8 To 10 Ft, Subsiding To 6 To 8 Ft In The Afternoon. Wave Detail: E 9 Ft At 8 Seconds And W 4 Ft At 12 Seconds. Rain In The Morning, Then Showers In The Afternoon. |
| Wed Night...S Wind 25 To 30 Kt. Seas 5 To 7 Ft. Wave Detail: Se 5 Ft At 6 Seconds And Sw 6 Ft At 16 Seconds. Rain. |
| Area Forecast Discussion National Weather Service Seattle WA 930am PDT Sat Nov 1 2025 Synopsis A frontal system will move across Western Washington today for continued rain and increased winds. Showers linger into Sunday before another weak system possible Monday into Tuesday. Unsettled conditions continue midweek to late week with additional fronts. Short Term - Today through Monday The forecast is largely on track this morning. The main focus is on rainfall accumulations with possible river flooding in the Cascades - Flood Watched remain in effect. Windy conditions this morning with gusty west winds through the strait this afternoon. 33 Previous discussion...Stratiform precipitation continues across Western Washington this morning as a frontal system over the NE Pacific tracks towards Western Washington. The 06z surface analysis from WPC shows the system located offshore of central Oregon at 1008 mb. In general, the system will track into the northern portions of the Olympic Peninsula this morning and into southern BC by midday. South winds will increase rapidly between 500-800am as the front approaches. HREF/REFS continue to maintain a 40-80% chance of gusts exceeding 40 MPH this morning over the majority of Western Washington, particularly Skagit County southwards. Probabilities of gusts over 50 MPH drop to less than 15% for most areas, peaking near Grays Harbor County around 25-30%. The Wind Advisory remains in place, with gusts of 35-45 MPH expected, and a few localized gusts up to 50 MPH possible. Winds will peak between 800am to 1200 PM, for a brief period of gusty winds. In addition to the inherited Wind Advisory, also issued a new Wind Advisory for Western Whatcom County and San Juan Islands. Despite the system moving through in less than 12 hours, more uncertainty exists in the wind forecast for these locations. This uncertainty can be seen quite well in the REFS spread. For example at Bellingham, the 25th-75th spread in wind gusts is 6 MPH and 39 MPH.. a difference of 33 MPH. However, recent trends in RRFS, as well as additional hi-res guidance (HRRR/NAM), lends more confidence in potential stronger southerly winds for portions of Whatcom & San Juan Islands. For this reason, issued a Wind Advisory for these areas this morning. However, depending on the boundary location as the system moves through, its very possible there is a decent gradient in wind gust magnitude from south-north for these areas. Finally, on the wind side of things, UIL-BLI gradients will increase fairly rapidly post-frontal, allowing for a stronger push of west winds through the Strait of Juan de Fuca midday through the afternoon. Westerly winds gusts may exceed 40 MPH for portions of Admiralty Inlet and Whidbey Island during this period. The Wind Advisory for these locations extends through the afternoon (longer than other locations) given this wind shift and increase. Localized tree limb damage and power outages are possible today for Western Washington. In addition to the wind, stratiform precipitation will continue through this morning before the cold front slides through around midday. Steadier precipitation will then taper to showers around midday, with a convergence zone expected to develop over Snohomish/King Counties later this afternoon and evening. Refer to the Hydrology ction for additional information regarding river flooding potential. A High Surf Advisory also remains in affect along the coast today with large breaking waves of 15 to 20 ft with a dominant period of 17 seconds. Large waves may run further up area beaches. Showers will linger into Sunday morning, mainly for areas King County northwards and over the Cascades, before drier weather is expected late Sunday into Monday morning. Another weather system may move onshore into Oregon later Monday, resulting in precipitation spreading northwards into portions of Washington. Otherwise, temperatures will be a bit warmer today into the mid 50s and low 60s before temperatures in the low to mid 50 returns Sunday. Long Term - Monday Night Through Friday Precipitation from the aforementioned system may linger into portions of Western Washington Monday night, although some uncertainty remains into the extent of precipitation Monday into early Tuesday. A brief break between systems is likely on Tuesday, before another stronger frontal system moves through Tuesday night into Wednesday. This system also looks to bring the potential for another round of breezy winds, particularly for the coast and areas north of Snohomish County. Unsettled conditions are expected to continue with another system Thursday into Friday with troughing located offshore. Temperatures are expected to Marine A frontal system will move across the waters this morning with increased southerly winds. Gale force wind gusts expected for a period this morning for most waters, with Small Craft Advisory winds for the northern Coastal Waters and western Strait of Juan de Fuca. Winds will peak by early afternoon for most waters. Onshore flow will increase behind the system this afternoon, with a strong westerly push through the central and eastern portions of the Strait of Juan de Fuca. Gales are expected for the Strait this afternoon into early this evening. Winds will then ease tonight into Sunday. Winds will transition more east on Monday with another weak system expected late Monday into Tuesday. A stronger frontal system will then move into the waters late Tuesday into Wednesday for the return of Small Craft Advisory winds and potential gales for the coast, as well as portions of the interior waters. Seas will build to 15 to 20 feet today, before subsiding to 10 to 15 feet on Sunday. Seas will further subside to near 10 feet on Monday before building late Tuesday into Wednesday. JD Hydrology Another 1.00 to 1.50 inches of rain forecast for the Cascades and Olympics this morning. Rain rates decreasing significantly after 18z with only another 0.25 inches in the Olympics and 0.25 to 0.75 inches in the Cascades between 18z-00z. Snow levels remaining in the 8000-9000 foot range this morning dropping quickly this afternoon to around 5000 feet in the Olympics and North Cascades and 6000-7000 in the Central and Southern Cascades. By 06z tonight snow levels all areas in the 4000 to 4500 foot range. Rivers on the rise this morning but with the rainfall amounts overnight a little less than expected most hydrographs running below the forecast. With more rain to come will keep the flood watch going but the chances for river flooding have diminished overnight. The two rivers of the most concern, the Skokomish and the Skykomish near Gold Bar could still reach or get close to flood stage later this morning into the afternoon hours. Rivers flowing off the Central and Northern portion of the Olympics are well within their banks and even with the additional rainfall this morning will stay below action stage. The rapid drop off in rain rates along the with the much cooler air mass moving into the area will end the flood threat across the area tonight. There is still a chance this morning to get rainfall rates high enough over the more sensitive burn scars for the potential for NOAA Seattle WA Office: Watches - Warnings - Advisories WA...Wind Advisory until 1pm PDT this afternoon for City of Seattle-Downtown Everett / Marysville Area-Eastern Kitsap County-Eastside-Foothills and Valleys of Central King County-Foothills and Valleys of Pierce and Southern King Counties-Foothills and Valleys of Snohomish and Northern King Counties-Foothills and Valleys of Thurston and Lewis Counties-Foothills and Valleys of the North Cascades- Lowlands of Pierce and Southern King Counties-Lowlands of Western Skagit and Northwestern Snohomish Counties- Lowlands of Western Whatcom County-Northern Hood Canal- San Juan County-Shoreline / Lynnwood / South Everett Area- Southern Hood Canal. Flood Watch through late tonight for Cascades of Snohomish and Northern King Counties-Cascades of Southern King County- Cascades of Whatcom and Skagit Counties-City of Seattle- Downtown Everett / Marysville Area-Eastside-Foothills and Valleys of Central King County-Foothills and Valleys of Pierce and Southern King Counties-Foothills and Valleys of Snohomish and Northern King Counties-Foothills and Valleys of the North Cascades-Foothills of the Western and Southern Olympic Peninsula-Lowlands of Pierce and Southern King Counties-Lowlands of Western Skagit and Northwestern Snohomish Counties-Lowlands of Western Whatcom County-Middle Chehalis River Valley-Olympia and Southern Puget Sound-Olympics-Shoreline / Lynnwood / South Everett Area-Southern Hood Canal-Willapa and Black Hills. Wind Advisory until noon PDT today for Foothills of the Western and Southern Olympic Peninsula-Grays Harbor County Coast-Lower Chehalis River Valley-Lowlands of Lewis and Southern Thurston Counties-Middle Chehalis River Valley-Northern Washington Coast-Olympia and Southern Puget Sound-Willapa and Black Hills. Wind Advisory until 7pm PDT this evening for Island County- Port Townsend Area. High Surf Advisory until 5pm PDT this afternoon for Grays Harbor County Coast-Northern Washington Coast. PZ...Small Craft Advisory until 11pm PDT this evening for Grays Harbor Bar Small Craft Advisory until 4am PDT Sunday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From Cape Flattery To James Island Out 10 Nm- West Entrance USA Waters Strait Of Juan De Fuca. Gale Warning until 8pm PDT this evening for Central U.S. Waters Strait Of Juan De Fuca. Gale Warning until 8pm PDT this evening for East Entrance U.S. Waters Strait Of Juan De Fuca. Gale Warning until 1pm PDT this afternoon for Admiralty Inlet Northern Inland Waters Including The San Juan Islands- Puget Sound and Hood Canal Gale Warning until noon PDT today for 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 until 4am PDT Sunday for 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. |
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