Marine Weather and Tide Forecast for Lake Shore, WA

SHORT TERM
Now through Sunday night...Thin clouds high in the sky have been streaming across the area at times today (most noticeable near the coast and into southwest Washington), but conditions remain dry and temperatures are still warming up nicely inland. Expect inland highs mainly in the lower to mid 70s today, while the coast stays cooler, generally upper 50s to mid 60s.

Later today and tonight, a weakening front will approach the coastal waters. Most of the moisture and lift look like they will remain offshore, so for most locations the main change will be increasing clouds this evening and overnight. While light showers will most likely stay over the ocean, there is a small chance a brief shower could brush the immediate north coast late tonight into Sunday morning. No rain is expected for inland areas.

Cloud cover tonight will keep temperatures milder than this morning. Lows should be mostly in the mid to upper 40s inland (a few cooler valleys could dip a bit lower), and generally in the 40s near the coast. With clouds and warmer nighttime temperatures, frost is not expected over at least the next couple mornings.

Sunday looks similar to today; warm and dry for most areas, with more thin high clouds around. Inland highs should again reach the low to mid 70s. Parts of the Portland/Vancouver metro and nearby communities could still reach 80 degrees if clouds thin enough during the warmest part of the day, but that will depend on how quickly cloud cover thickens (30-60% chance of daytime temperatures exceeding 80 degrees). There is moderate to high confidence that these high clouds will remain thin, allowing for good daytime heating. Coastal highs stay in the upper 50s to mid 60s. Sunday night remains drys inland with lows mainly in the 40s.

LONG TERM
Monday through Friday...On Monday, the offshore low pressure system will start to have more influence on our weather. Expect more cloud cover and slightly cooler temperatures compared to the weekend. Highs should generally be in the upper 60s to near 70 inland, and upper 50s to low 60s along the coast. Rain shower chances increase late Monday into Tuesday as the system begins to move closer and spread moisture inland, with the first steadier showers most likely over the higher terrain and the southern Willamette Valley. Even so, precipitation through Monday looks light overall, generally around 0.05 to 0.15 inch where showers occur.

Tuesday is still the trickiest day. While exact timing still needs refinement, confidence is higher that at least scattered showers will reach more of the area sometime late Monday into Tuesday, rather than staying largely offshore. If showers do begin Tuesday, they would most likely show up first along the coast and in areas farther south and west, then spread inland later.

Confidence is higher for Tuesday night into Wednesday: this is the most likely period for a more widespread cooler, and showery pattern across the area. The Coast Range and Cascades will be favored for more persistent showers due to terrain enhancement.
While rain amounts remain uncertain, expect around 0.25 to 0.75 inches in the lowlands and around 1 to 1.75 inches in the Coast Range and Cascades from 5 PM Tuesday to 5 PM Wednesday.

By Thursday and Friday, the pattern looks like it will trend drier again with temperatures slowly warming back up into the mid 60s and maybe 70s by Friday. A few leftover showers near the mountains are possible early in that period, but overall conditions should improve late week. ~12

AVIATION
High pressure will maintain widespread VFR flight conditions through 00Z Monday with scattered to broken high clouds around 20-25 kft. Winds will remain light and variable less than 5 kt, with one exception. Easterly winds at KTTD will remain breezy through at least 22Z Saturday with occasional gusts up to 20-25 kt before east winds gradually decrease in strength between 22-00Z. Expect easterly winds to restrengthen a bit between 12-18Z Sunday.

KPDX AND APPROACHES...Scattered to broken high clouds with cigs above 20-25 kft will maintain VFR flight conditions through 00Z Monday. Variable winds around 5 kt or less are expected to become easterly towards 17Z Sunday with sustained wind speeds approaching 10 kt. -23

MARINE
Benign conditions continue through the weekend. Southerly to southwesterly winds between 5-15 kt continue today with seas under 5 ft. Winds will weaken and become east to southeast by early Sunday morning. Winds then remain light through early next week with seas increasing by a few feet, but staying under 10 ft.

An area of low pressure sitting off the coast will move inland during the middle of next week. This will bring onshore flow, showers, and increasing winds and seas. However, uncertainty remains regarding exact wind speeds and wave heights. The placement of the low will determine what conditions materialize across the waters. The current forecast favors a period of increasing west to northwest winds late Tuesday into Wednesday with wind gusts reaching 20-25 kt or stronger by Wednesday afternoon. In fact, there is a 50-75% chance for max wind gusts over 25 kt. The highest probabilities are beyond 30 NM offshore.
Seas are expected to reach at least 10-12 ft by late Wednesday, however there is a 40-70% chance seas will peak over 12 ft over the northern and central outer waters. There is a 1-5% chance seas will peak as high as 15 ft, which represents the worst case scenario.

Very strong ebb currents will continue across the Columbia River Bar each morning through Tuesday. With seas expected to build slightly by early next week, a steep ebb chop may necessitate Small Craft Advisories in the hours around peak flow each day. -23

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.
WA...None.
PZ...None.