Point Grenville to Cape Shoalwater WA out 10 NM Marine Forecast
| Tonight...Nw Wind 10 To 15 Kt, Becoming N 5 To 10 Kt Late. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 10 Seconds. A Slight Chance Of Showers After Midnight. |
| Sun...Nw Wind 5 To 10 Kt. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 10 Seconds. |
| Sun Night...N Wind 10 To 15 Kt. Seas 4 To 6 Ft. Wave Detail: W 5 Ft At 10 Seconds. |
| Mon...Nw Wind 5 To 10 Kt. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 9 Seconds. |
| Mon Night...Nw Wind 10 To 15 Kt. Seas 4 To 5 Ft. Wave Detail: Nw 5 Ft At 8 Seconds. A Chance Of Showers After Midnight. |
| Tue...W Wind Around 10 Kt, Backing To Sw In The Afternoon. Seas 3 To 5 Ft. Wave Detail: W 5 Ft At 11 Seconds. Showers. |
| Tue Night...Sw Wind 5 To 10 Kt. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 10 Seconds. Showers, Mainly In The Evening. |
| Wed...Nw Wind 5 To 10 Kt. Seas 5 To 7 Ft. Wave Detail: W 7 Ft At 10 Seconds. A Chance Of Showers. |
| Wed Night...Nw Wind 5 To 10 Kt. Seas 5 To 7 Ft. Wave Detail: W 6 Ft At 10 Seconds. |
| Thu...Nw Wind 5 To 10 Kt. Seas 4 To 6 Ft. Wave Detail: W 5 Ft At 9 Seconds. |
| Thu Night...Nw Wind Around 10 Kt. Seas 4 To 5 Ft. Wave Detail: W 5 Ft At 8 Seconds. |
| Area Forecast Discussion National Weather Service Seattle WA 211pm 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 - Tonight Through Monday An upper level trough will continue to drop southward from British Columbia throughout the weekend, maintaining unsettled and cooler conditions. A surface front will continue to slide across western Washington this afternoon, pushing a line of showers and isolated lightning activity eastward. Rainfall totals will be fairly light, with a quarter inch or less across the lowlands and locally higher amounts closer to half an inch over higher terrain. While dense cloud cover is limiting the instability as this system moves through, a few more lightning strikes cannot be ruled out (10% to 15% probability) this afternoon in stronger showers that develop, and the highest chance remains over the North Cascades towards the Canadian border. Onshore flow behind the frontal passage enhances the chances for convergence showers to develop over the central Puget Sound later this evening, which may generate locally heavy rain. 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 - Tuesday 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 Post cold front showers continue across inner waterways this afternoon as an upper level low digs over the region, and tracks eastward. Brief downpours from these showers may reduce visibilities to mariners. Gusty west winds will work their way into 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. HPR NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory from 4pm this afternoon to 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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