Marine Weather and Tide Forecast for Cohassett Beach, WA

SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/
Mostly clear skies this afternoon with a few high clouds around. A weak upper level ridge will settle over Western Washington early Wednesday, bringing another round of morning fog/low clouds, especially along the southern interior. Improvement expected by late morning or early afternoon to mostly clear skies with high temperatures in the upper 40s to low 50s. The upper level ridge will begin to flatten Thursday evening as the next frontal system approaches. With the ridge still in place Thursday morning, another round of fog/low clouds is likely. Cloud cover will increase inland Thursday afternoon as the frontal system arrives to the coastline.

LONG TERM /FRIDAY THROUGH TUESDAY/
The aforementioned frontal system will continue into Friday bringing widespread lowland rain and mountain snow. There is good agreement between ensembles that the weather pattern will remain unsettled into the weekend and into early next week. In addition, model guidance continues to highlight an upper level trough digging southwards into California on Sunday, opening the opportunity for a colder air mass to settle over Western Washington through Tuesday.
This may bring the potential for snow to mix with rain at the lower elevations during the overnight hours. However, at this time no accumulation is expected for the lowlands given that PoPs will be generally less than 30% and QPF amounts are less than 0.05 inches. 29

AVIATION
Weak high pressure will nudge inland tonight and Wednesday for dry and stable conditions. The flow aloft is westerly, becoming northerly on Wednesday morning. Low clouds and fog will redevelop overnight and mainly impact areas around the south sound. Low clouds and fog will dissipate by 18-20Z with VFR conditions expected. 33

KSEA...N winds 8-12kt with VFR conditions this evening. Patchy low clouds in the vicinity 12-16Z. 33

MARINE
High pressure will continue building over area waters through Thursday morning, bringing calm marine conditions. A front will move over the waters late Thursday into Friday, with additional systems possible into the weekend and early next week.

Seas 7 to 8 ft this afternoon will continue decreasing to 5 to 6 ft by Wednesday and begin to rise Thursday afternoon, building as high as 13-17 ft early Friday morning. Seas will gradually decrease Friday evening, hovering between 8 to 10 ft through early next week. 29

HYDROLOGY
River flooding is not expected during the next seven days

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...None.