Marine Weather and Tide Forecast for Three Lakes, WA

SHORT TERM /TONIGHT THROUGH MONDAY/
Onshore flow prevails and western WA remains under cloudy skies with isolated to scattered showers. Temperatures are only in the 50s or around 5-10 degrees cooler than average.

More showers are headed our way tonight and Saturday as an upper level trough moves in. Showers will be enhanced during the afternoon with the passing trough axis and a convergence zone developing in the interior. The air mass will be slightly unstable with a chance of thunderstorms too. Up in the mountains, snow levels will lower from around 4500' down to 3500' Saturday night and the Cascades may see light snowfall accumulations.

A cool upper low remains overhead on Sunday for more clouds, light showers, and overall cool conditions. Most of she shower activity remains over the Cascades where snow levels stay low (3500-4500').

We'll see a brief break in the weather with a ridge late Sunday, then more rain on Monday with the next frontal system. Temperatures remain cooler than average with highs around 60 degrees. 33

LONG TERM /TUESDAY THROUGH FRIDAY/
There is broad troughing over the Pac NW next week with ongoing onshore flow. A series of weak upper level systems will clip the area for a chance of showers through the period. Late in the week (and next weekend)
there are signs of warmer and drier weather with stronger ridging over the region. The majority of the ensemble members show highs reaching the 70s over the weekend. 33

AVIATION
Westerly flow aloft will become southwesterly tonight as the next in a series of upper troughs and associated weak fronts approaches Western Washington. The air mass remains moist with widespread MVFR ceilings. Shower coverage will increase overnight into early Saturday with ceilings dropping to low MVFR or IFR.

KSEA...Mainly MVFR ceilings expected through the evening with any low end VFR improvement expected to be brief. Showers will increase late tonight into Saturday with low MVFR or occasional IFR ceilings.
Surface winds S/SW 7 knots or less turning light and variable during the overnight period then returning to S/SW and increasing to 8 to 12 knots by later Saturday afternoon. 27

MARINE
Another front will dissipate as it moves into the coastal waters overnight. Surface high pressure will then rebuild over the coastal waters later Saturday into Sunday. This will produce increasing onshore flow and headlines for the coastal waters, strait, and northern portions of the inland waters. The next frontal system will arrive on Monday. 27

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory from 3 PM Saturday to 11 AM PDT Sunday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm-Coastal Waters From Cape Flattery To James Island Out 10 Nm-Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm-West Entrance U.S.
Waters Strait Of Juan De Fuca.

Gale Warning from 3 PM Saturday to 5 AM PDT Sunday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S.
Waters Strait Of Juan De Fuca.

Small Craft Advisory from 5 PM Saturday to 11 AM PDT Sunday for Northern Inland Waters Including The San Juan Islands.

Small Craft Advisory from 3 PM Saturday to 5 AM PDT Sunday for Admiralty Inlet.