Marine Weather and Tide Forecast for Eastmont, WA

SHORT TERM /TONIGHT THROUGH MONDAY/
The latest forecast remains on track with no updates this evening outside of a refreshed aviation section below. Latest satellite shows clearing skies this evening under northerly flow aloft. Upper level ridge over the area with the ridge axis moving over Western Washington later tonight keeping skies mostly clear. Surface gradients going light overnight with lows in the mid 30s to mid 40s.

Surface gradients remaining light Friday with the upper level ridge axis overhead. This will make Friday the warmest day in this set with highs in the 60s and lower 70s. Most of the lower 70s will be from Seattle south over the interior and in the Cascade foothills. We have had some warm days this time of year in Seattle the last few years. In 2021 Seattle set a record for the most 70 degree plus days in a row in April between the 15th and the 21st. In 2016 between the 17th and 20th Seattle had four straight days of highs in the 80s including the warmest April day on record in Seattle, 89 degrees on the 18th.

Upper level ridge axis shifting east Friday evening with an upper level trough quickly moving into the area by 12z Saturday. Flow aloft splitting a little off the coast which will weaken the trough as it moves inland. Chance of showers mainly on the coast and over the North Cascades late. Lows in the 40s.

Upper level trough moving through Saturday morning with another upper level trough approaching the coast by late afternoon. Air mass slightly unstable keeping a chance of showers in the forecast. Much cooler Saturday with highs back in the mid 50s to lower 60s.

Next upper level trough axis moving through Saturday evening with a convergence zone over Snohomish county possible behind the trough. Lows upper 30s to mid 40s.

Strongest and coolest portion of the upper level trough moving over Western Washington Sunday with increasing shower coverage during the day. Snow levels lowering to around 3500 feet for a few inches of snow on the higher passes. Highs in the mid 50s.

Trough axis moving through Sunday evening with a stronger convergence zone likely over Snohomish and northern King county behind the trough axis. Still a little early to pinpoint the exact location of the convergence zone. There is a chance it could set up over Stevens Pass with snow levels low enough for snow in the pass. Lows in the mid 30s to lower 40s.

LONG TERM /TUESDAY THROUGH FRIDAY/
Northwesterly flow aloft Monday in the wake of the trough. Some residual weak instablilty in the air mass will keep a chance of showers in the forecast. The best chances for showers will be in the Cascades and Cascade foothills. Highs remaining cool, in the mid 50s.

A weak dry upper level trough dropping down from the north Tuesday will clear the skies over the area. Even with the sunshine highs near normal, mid 50s to lower 60s.

Upper level ridge building Tuesday night and sticking around into Thursday. Upper level trough moving south Tuesday night turning into a weak cut off low to the south of the area Wednesday into Thursday. Right now this feature remains far enough to the south to keep any mention of showers out of the forecast. Wednesday morning will be a cool one with frost advisories possible. Lows in the 30s and lower 40s. Highs warming Wednesday and Thursday into the upper 50s to mid 60s.

Felton

AVIATION
An upper level ridge continues to move over the area with northerly flow aloft. The air mass remains dry and stable with generally light to northerly winds. Winds will become light and variable tonight, resuming as west/southwest tomorrow 5 to 10 kt.
Widespread VFR conditions will persist at all terminals throughout the TAF period. One exception--hi-res models are hinting at the chance for some low stratus development along the coast between around 12-18Z tomorrow morning which may bring a brief period of MVFR conditions tomorrow morning at HQM.

KSEA...VFR conditions with some high cirrus. Easing north winds this evening, becoming light east overnight. Winds tomorrow will switch to southwest 6 to 10 kt.

62

MARINE
Surface ridging will remain over the waters into Friday. A weak front will slip southward along the British Columbia coast into area waters Friday night into Saturday. Increasing northwesterlies over the coastal waters and strengthening onshore flow will bring solid small craft conditions to many area waters. Seas 5 to 7 ft tonight into Friday building to above 10 feet late Friday night into Saturday. In addition, steep seas possible with periods under 10 seconds over the coastal waters Friday into Saturday. A secondary system will produce a similar result later Sunday into early Monday.
High pressure will then rebuild across the waters early next week.

45

HYDROLOGY
No river flooding is expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory from noon Friday to midnight PDT Friday night for Central U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 3 PM Friday to 5 AM PDT Saturday for East Entrance U.S. Waters Strait Of Juan De Fuca.

Small Craft Advisory from 6 PM Friday to 6 AM PDT Saturday for Admiralty Inlet-Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory from 8 PM Friday to noon PDT Saturday for Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

Small Craft Advisory from 3 PM Friday to 6 PM PDT Saturday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm.