AGPN40 KWNM 300328 MIMPAC Marine Weather Discussion for N Pacific Ocean NWS Ocean Prediction Center Washington DC 828 PM PDT Thu Apr 29 2021 .FORECAST DISCUSSION...Major features/winds/seas/significant .weather for the North Pacific N of 30N and E of 150W. At this time I don't plan on making any changes to the current grids or associated text forecasts. ----------------------------------------------------------------- PREVIOUS DISCUSSION... High pressure was centered to the W of the central CA waters with a ridge extending NE over the N CA and SE OR waters. A cold front was to the W of the WA/OR and N CA waters early this afternoon. There was a ASCAT pass over portions of the offshore waters at 17Z/10 AM PDT which covered much of the WA waters and the outer OR/northern CA waters and also the most of the sourthern CA waters. Max winds were to 20 kt over the outer WA/OR waters. Winds were to 25 kt just W of the outer WA offshore waters. The weakening cold front moves E over the WA/OR outer waters later this afternoon into tonight. The weak cold front moves S and SE into the northern CA waters Fri, then into the central CA waters Fri night and Sat then dissipates as it crosses into the southern CA waters. A broad area of high pressure expands and builds in from the W later Fri through Sat night over the central areas of the offshore waters, then persists into Mon night and then weakens into Tue night. Current headlines have gales developing later Sun and Sun night over the inner waters of the central and S CA waters and will maintain them. Could have gales lasting into Mon, but will have 30 kt for Mon into Mon night over the CA waters due to ECMWF being not as strong with the area of high pressure. The area of high pressure becomes weaker later Mon night through Tue night. The resultant winds gradually diminish in areal coverage as this occurs. For the grids will use the GFS overall through the forecast period with the exception of late Mon into Mon night where we will cap the winds to 30 kt along the inner central CA waters. Seas...Both the 12Z GFS wave guidance and ECMWF wam are initialized well over the offshore waters early this afternoon and similar through early Sat. The GFS wave guidance has higher seas developing across the central and southern CA later on Sat into Sat night with the ECMWF wam catching up with the GFS wave guidance later on Sun into Sun night. For the grids will use the GFS wave through the forecast period. This is the final north Pacific ocean marine weather discussion (MIM). Reference the National Weather Service service change notice: https://www.weather.gov/media/notification/pdf2/scn21-35min_discontinue.pdf .EXTRATROPICAL STORM SURGE GUIDANCE...n/a .WARNINGS...Preliminary. .PZ5 Washington/Oregon Waters... None. .PZ6 California Waters... .PZZ825...Inner Waters from Point Arena to Pigeon Point... Gale Possible Sunday night into Monday. .PZZ830...Inner Waters from Pigeon Point to Point Piedras Blancas... Gale Possible Sunday night. .PZZ835...Inner Waters from Point Piedras Blancas to Santa Cruz Island, CA... Gale Possible Sunday night. $$ .Forecaster Shaw/Rowland. Ocean Prediction Center.