Central U.S. Waters Strait of Juan de Fuca Marine Forecast
| Tonight...W Wind 25 To 35 Kt Easing To 20 To 30 Kt After Midnight. Wind Waves 4 To 6 Ft. |
| Wed...W Wind 15 To 25 Kt. Wind Waves 2 To 4 Ft. |
| Wed Night...W Wind 15 To 25 Kt. Wind Waves 2 To 4 Ft. |
| Thu...W Wind 15 To 25 Kt. Wind Waves 2 To 4 Ft. |
| Thu Night...W Wind 15 To 25 Kt. Wind Waves 2 To 4 Ft. |
| Fri...W Wind 15 To 25 Kt. Wind Waves 2 To 4 Ft. |
| Fri Night...W Wind 15 To 25 Kt Easing To 5 To 15 Kt After Midnight. Wind Waves 2 To 4 Ft Subsiding To 2 Ft Or Less After Midnight. |
| Sat...W Wind To 10 Kt Rising To 10 To 20 Kt. Wind Waves 1 Ft Or Less Building To 1 To 3 Ft. |
| Sun...W Wind 5 To 15 Kt. Wind Waves 2 Ft Or Less. |
| Area Forecast Discussion National Weather Service Seattle WA 423pm PDT Tuesday May 30 2023 Synopsis Low level onshore flow and upper level troughing over the northeast Pacific will continue to yield daily marine pushes and cooler temperatures over the next few days. A warming trend then looks to take shape over the weekend and into next week as high pressure builds across Canada and the northern Plains and nudges into the region from the east. Short Term - Tonight Through Friday Satellite imagery shows stratus slow to clear and still lingering across the interior this afternoon. Expect stratus to continue to scatter through sunset for some glimpses of afternoon sun. Current temperatures as of 3PM/22Z generally range in the upper 50s to low 60s for the majority of the area. With cloud cover still persistent across the central Sound, expect afternoon highs to remain below normal and generally top out in the upper 50s to mid 60s. An upper level low will drop southward into the Gulf of Alaska Wednesday and traverse the Gulf over the next several days. This will help deepen the upper level trough influence over the northeast Pacific and will help maintain onshore flow across western Washington. A shortwave will move across the area on Wednesday, which may bring some light showers to the North Cascades as it lifts northeastward across central Washington. Otherwise, expect marine stratus to move back into the region for a mostly cloudy start to the day. A few areas of drizzle will also be possible in stratus during the early morning hours. Stratus then looks to linger into the afternoon and scatter late for some sun by the evening. A few spots (like the Olympics), however, may have a harder time scattering out tomorrow. Afternoon high temperatures will remain below normal - likely only topping out in the upper 50s to mid 60s. Low level onshore flow will continue into Thursday, with another round of stratus expected to move across western Washington during the morning hours. High temperatures may climb a few degrees, making it into the mid 60s to low 70s across the interior. Temperatures along the coast will remain cooler - and are only expected to make it into the low 60s. The overall upper level pattern then looks to amplify on Friday as troughing over the northeast Pacific deepens and an upper level ridge over the Great Lakes starts to build and retrograde westward. Onshore flow will continue across western Washington in the low levels and will bring another round of marine stratus to the region. Temperatures look to climb a few degrees - with afternoon highs generally making it into the mid 60s to mid 70s. Long Term - Saturday Through Tuesday Western Washington then looks to remain stuck between upper level troughing over the northeast Pacific and a westward building ridge moving across the northern Plains and into Canada over the weekend. Temperatures will be in the mid 60s along the coast to upper 60s to mid 70s across the interior. Ensembles still indicate some uncertainty in just how far west the ridge will retrograde early next week - and thus show a greater max temperature spread amongst guidance on Monday and Tuesday. Overall consensus still shows a warming trend across the region, however, so have trended the forecast max temps toward the NBM 50th percentile for now, which has highs topping out in the 70s to mid 80s for most of the region by Tuesday. A few spots may approach the upper 80s across the southwest interior. Marine High pressure over the waters will help to maintain persistent northwesterly winds over the coastal waters at times with diurnal enhanced westerly pushes down the Strait of Juan de Fuca for the next several days. The westerly push this evening is expected to strengthen with a small craft advisory transitioning to a gale warning overnight. In addition expect the adjacent waters of Admiralty Inlet and the Northern Interior to experience SCA (Small Craft Advisory) conditions once the Strait hits gale. For the coastal waters the expectation is for winds to gradually ease to 10 to 20 kt, and seas 6 to 8 ft. Hydrology The daily hydrology discussion has ended until the start of the next rainy season; it will only be updated as needed. NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory until 5pm PDT this afternoon for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Gale Warning until 5am PDT Wednesday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory until 5am PDT Wednesday for Admiralty Inlet Northern Inland Waters Including The San Juan Islands. |
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