NORTHERN CALIFORNIA WATERS

SYNOPSIS...High pressure will be centered W of the N waters tonight through Thu, then begin to weaken as it moves towards the N waters Thu night into Fri. Broad and weak ridging will move into W parts of the area Sat through Mon night. A trough will remain in place along the N and Central California coast tonight through Thu then dissipate Thu night. Another weak trough will form along the entire California coast Sat through Mon night.