Marine Weather and Tide Forecast for Lofall, WA

SHORT TERM /TONIGHT THROUGH MONDAY/
Upper level analysis shows an upper level low just off the coast of northwest B
C
The flow aloft is southwest as a couple of weak troughs swing around the low today/early Saturday. No significant weather is expected with these troughs (other than there will remain a few more clouds today with clearing expected to be minimal over most of western WA,except for along and north of the Strait of Juan de Fuca). As such, highs will remain cool with some areas remaining in the 50s (some urban areas and areas clear will have the best chance of seeing temps creep up into the 60s). Conditions will be dry regionwide (though could be a few sprinkles in the Cascades this afternoon).

Over the weekend: Down at the surface, high pressure will build offshore with lower heights further inland to the east. This will keep the flow onshore with light west to northwest winds at the surface. There will be a descent push of marine air tonight/Saturday morning (which will push most clouds back in across the region). Once the weak trough passes through, clouds will clear out going into Saturday afternoon and it will remain dry through the weekend. Sunday will be sunnier compared to Saturday with not as significant of a marine push Sunday morning.
Highs will be a touch warmer Saturday/Sunday with the clearer skies - will peak Sunday with temps reaching upper 60s to mid 70s (warmest temperatures from metro Seattle south along the I-5 corridor). Lows will remain comfortable with a few more low 50s Sunday night (otherwise lots of 40s and potentially a few South Interior locations getting close to dropping in the 30s Sunday morning).

By Monday, another shortwave trough and weak front will approach from the west, and begin to increase the chance of showers Monday afternoon/evening along the coast. Amounts are expected to be light. Cloud coverage will remain partly cloudy/sunny through Monday with clouds increasing along the coast. Temperatures are expected to remain steady from Sunday.

LONG TERM /TUESDAY THROUGH FRIDAY/
The low offshore will remain in place through much of next week. It does not appear (based on ensembles) that it will move inland until Friday of next week. The front/trough approaching Monday will continue into Tuesday with shower chances increasing across the region Tuesday into Wednesday. Amounts at this time will be light (hit or miss showers expected). There is also a 10-15% chance of thunder in the north (Whatcom County), however at this point, the best chance of thunder is over the border into Canada (but this may shift as more guidance comes in). Another round of showers is possible Friday as the low is expected to move inland by then. Highs again will remain steady and right around normal through the week.

HPR

AVIATION
A mix bag of ceilings this afternoon across Western Washington between VFR and MVFR. Terminals have been struggling to scatter this afternoon. Conditions still expected to improve into VFR later this evening/tonight for all the terminals. Another round of low stratus is expected Saturday morning, which will bring down ceilings down to MVFR. The low ceilings will be limited to the coast and Puget Sound terminals, so terminals to the north (KCLM and KBLI), will likely remain VFR throughout the TAF period. Generally SW flow 4-7 kt along the interior, with the exception of KPAE. Winds for KPAE are expected to shift northerly this afternoon. Winds along the coast and Strait will be more W/SW around 7-12 kt.

KSEA...Conditions have been slow to improve this afternoon at the terminal into VFR. Not expecting conditions to completely scatter this afternoon. VFR conditions this evening/tonight. However, another push of stratus may drop ceilings to MVFR around 12z Saturday, with improvement likely after 18-21z. SW surface flow 5-7 kt will turn more westerly late Saturday morning/early afternoon.
Northerly flow returns Saturday evening.

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MARINE
Surface high pressure will move to the east this weekend and over the coastal waters. A Small Craft Advisory remains in effect until 6 PM for the coastal waters for choppy waters. Latest buoy observations do show a decreasing waveheight trend. Diurnal westerly pushes will occur every evening in the Strait of Juan de Fuca (some likely needing the issuance of headlines). Today's push looks to remain below 21 kt and have decided to hold off on issuing a Small Craft Advisory. However, may occasionally see gusts in the 21-25 kt range. Tomorrow's push down the Strait will be stronger and will likely need additional headlines as sustained winds will be around 21-25 kt. A weakening front will move over the coastal waters on Monday, followed by additional systems next week. Seas will remain below 10 ft into the weekend and next week.

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SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory until 6 PM PDT this evening 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.