Marine Weather and Tide Forecast for Oak Harbor, WA

SHORT TERM /TODAY THROUGH FRIDAY/
An upper level low spinning off the coast of SE Alaska and British Columbia will continue to drive the weather across the Pacific Northwest over the second half of the week.

A weak frontal system will move across western Washington today, bringing increased shower activity to the region. Rainfall amounts will be rather light with this system, with most lowland locations expected to only receive a few hundredths to up to a tenth of an inch of rain. Locally higher amounts of up to a quarter of an inch will be possible in the mountains, where shower activity will become more confined to by the afternoon and evening hours.
Afternoon high temperatures will cool a few degrees from Tuesday's highs and look to top out in the mid 60s to low 70s across the interior and in the upper 50s to low 60s along the coast.

A few post-frontal showers look to linger across western Washington into Thursday, but expect the day to be drier as a whole. Afternoon highs will be in the upper 60s to low 70s across the interior and in the 60s along the coast.

The most notable precipitation of the week will arrive on Friday as the upper level low spinning off the coast of SE Alaska and British Columbia sinks southward and moves inland across the region. This cool system will bring more widespread rain to the lowlands and even a few inches of snow to the higher mountain peaks as snow levels fall between 5000-6000 feet. Those with plans for outdoor recreation in the mountains Friday into the weekend will want to make sure to monitor the forecast for the latest updates. High temperatures will trend much cooler, with highs for the majority of the area only climbing into the upper 50s to low 60s.

LONG TERM /SATURDAY THROUGH TUESDAY/
Cool and showery conditions will continue into the weekend, with Saturday still on track to be the wettest day of the week. Showers will gradually become more confined to the Cascades by the evening hours as the upper level low starts to move off to the east. Temperatures will remain cool, with highs expected to be in the low 60s.

Conditions then start to warm up and dry out Sunday into early next week as the low exits the region and upper level ridging starts to nudge its way back into the area from the west. High temperatures look to climb a couple degrees each day, topping out in the mid 70s to low 80s again by Tuesday. A few passing shortwaves in the northwesterly flow aloft may bring some showers to the higher terrain at times over the first half of the week.

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AVIATION
Weak upper level trough moving through the area this afternoon. Southwesterly flow aloft into Thursday. Low level onshore flow increasing behind the trough this afternoon and evening.

MVFR cigs (isolated lower) currently. Ceilings lifting back up to low end of VFR by 18z-20z with the cloud deck scattering out after 00z. The exception to this will be a convergence zone between KSEA and KPAE keeping VFR ceilings 00z-06z.Possible MVFR ceilings developing right along the coast 09z-15z Thursday morning.

KSEA.. MVFR cigs currently. Ceilings lifting back to low end VFR 17z- 18z. VFR ceilings continuing into the evening with the clouds scattering out by 06z. Southwest wind 6 to 10 knots increasing to 10 to 15 knots with gusts 20 to 25 knots 18z-00z. Winds easing back down to 6 to 10 knots after 00z before going variable less than 6 knots after 07z.

MARINE
A weak front has moved through the waters this morning.
High pressure will rebuild tonight and Thursday. The high will weaken Thursday night. A low pressure system will slowly track across the waters Friday into Saturday. High pressure will begin to rebuild late Sunday.

Small craft advisory westerlies in the Central and Eastern Strait of Juan de Fuca behind the system this afternoon and evening.
Diurnal westerly pushes Thursday night and Friday night also strong enough for small craft advisory westerlies in the Central and Eastern Strait. Diurnal pushes will weaken over the weekend.
Felton

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory from 2 PM this afternoon to 3 AM PDT Thursday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca.