San Juan Islands and Northern Inland Waters Marine Forecast
| Tonight...Sw Wind 5 To 10 Kt, Easing To Around 5 Kt Late. Waves Around 2 Ft Or Less. A Chance Of Showers With A Slight Chance Of Tstms Early This Evening, Then A Slight Chance Of Showers Late This Evening. A Chance Of Showers After Midnight. |
| Sun...W Wind Around 5 Kt, Veering To Nw In The Afternoon. Waves Around 2 Ft Or Less. |
| Sun Night...Nw Wind 5 To 10 Kt, Easing To Around 5 Kt After Midnight. Waves Around 2 Ft Or Less. |
| Mon...Nw Wind Around 5 Kt. Waves Around 2 Ft Or Less. |
| Mon Night...Sw Wind Around 5 Kt, Backing To S After Midnight. Waves Around 2 Ft Or Less. |
| Tue...S Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. A Chance Of Showers In The Morning, Then Showers In The Afternoon. |
| Tue Night...Se Wind 5 To 10 Kt, Veering To W After Midnight. Waves Around 2 Ft Or Less. Showers. |
| Wed...Nw Wind Around 5 Kt. Waves Around 2 Ft Or Less. A Chance Of Showers. |
| Wed Night...Sw Wind Around 5 Kt. Waves Around 2 Ft Or Less. |
| Thu...W Wind Around 5 Kt. Waves Around 2 Ft Or Less. |
| Thu Night...Sw Wind Around 5 Kt. Waves Around 2 Ft Or Less. A Chance Of Showers After Midnight. Winds And Waves Higher In And Near Tstms. |
| Area Forecast Discussion National Weather Service Seattle WA 826pm PDT Sat September 14 2024 Synopsis An upper level trough stationed over the region today will pivot southward over the weekend, maintaining cloudy skies, cooler temperatures, and shower activity. Conditions will dry out on Monday under split flow before another system moves into the Pacific Northwest mid-week. Ridging is favored to return towards the end of next week, bringing potential for for drier and warmer conditions. Short Term - Today through Tuesday An upper level trough will continue to drop southward from British Columbia throughout the weekend, maintaining unsettled and cooler conditions. Shower activity has diminished across most of western Washington, the exception being across King County where light showers persist in conjunction with weak convergence. Convergence zone showers will continue to diminish through the overnight hours. Elsewhere, cloud cover will stick around with another marine push bringing in low stratus later tonight. Precipitation chances across western Washington decrease into Sunday as the upper level low dives southward towards the California coast. Wrap-around moisture from the parent low may generate light showers over the Cascades, while the lowlands and coast will see sun breaks as drier air moves inland. High pressure will continue to amplify inland from the west on Monday, generating split flow aloft and allowing conditions to dry out ahead of the next incoming system. Temperatures through the short-term will stay on the cool side for mid September, with most lower elevations seeing highs in the low to mid 60s and lows in the upper 40s to low 50s. Long Term - Wednesday Through Saturday Models continue to show good agreement over another trough dropping southward on Tuesday, bringing in another round of cooler temperatures and widespread showers. Ensembles favor slightly higher rainfall amounts with this system, with over an inch along the coast and over the western slopes of the Olympics. This system will once again dive to the south along the Pacific Coast late Tuesday into Wednesday, with showers and cloudy skies lingering throughout the day Wednesday. Lowland temperatures will stay below normal in the low to mid 60s under the influence of this system. Thursday and Friday bring in more uncertainty, with the potential for a weak shortwave trough over southern British Columbia to generate light shower activity and more cloudy skies over western Washington. Long-range ensembles favor ridging over the Pacific Northwest towards the end of next week paired with low level offshore flow, which would allow conditions to clear out and warm up. While current forecasts return temperatures to seasonal normals, a warm start to the fall season cannot be ruled out. Lindeman Marine Gusty west winds will continue across the central/east Strait of Juan de Fuca early this evening, with sustained winds around 21-23 kt (gusting to 25-28 kt). The small craft advisory will continue in this area through 2am PDT. Otherwise, winds will remain out of the northwest post-front over the coastal waters, with the gustiest winds in the far outer coastal waters (Sunday into Monday, and Tuesday into Wednesday up to 20 kt gusts). Seas 5 to 7 feet Saturday through Tuesday, dropping to 3 to 5 feet before picking back up briefly to 6 to 8 feet with a disturbance moving through Wednesday/Thursday. JD/HPR NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory until 2am PDT Sunday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. |
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