NORTHERN CALIFORNIA WATERS

SYNOPSIS...A strong area of high pressure will remain centered just to the W and NW of the region through Wed, then will slowly weaken and sink SW on Thu. The area of high pressure will shift back N and become centered NW of the area Thu night into Fri, then remain NW of the area through Sat night. A coastal low pressure trough will persist through Tue night, slowly weaken Wed into Thu night, and then persist along the northern California coast Fri through Sat night.