WASHINGTON AND OREGON WATERS

SYNOPSIS...Weak low pressure and an associated trough will move slowly across the central and N portion of the waters tonight, then dissipate late. Thereafter, broad high pressure will build across the waters from the W on Sun and persists through Mon. A weak cold front will move into the N and Central portions of the area Mon night and dissipate on Tue. Thereafter a ridge of high pressure will remain just W of the regional waters Tue night through Thu night.