SYNOPSIS...A stationary front over the western portion of the waters will drift E as a cold front today and tonight, then dissipate Fri. A high pressure ridge will build to the NW of the waters today and tonight, then weaken Fri as a weakening cold front approaches. The front will dissipate as it moves SE into the northern waters late Fri into Fri night. High pressure will build NE towards the Oregon waters Sat into Sun night then weaken by Mon, as another weakening cold front slowly approaches from the NW. The front will dissipate over the NW portion late Mon, with high pressure re-building to the W of the waters Mon night.