marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 130 am PDT Mon Aug 20 2018
.Forecast discussion...Major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.
There was a ascatb pass at 05z with a swath across much of the offshore waters. The strongest winds were along the inner waters of the nrn CA waters associated with the nrn CA trof where winds were to 30 kt. Another area of winds to 25 kt were over the outer waters of the WA/OR offshore.
An area of high pressure remains to the W of the nrn and central areas of the offshore waters early this morning while a trough was near the N CA coast. Another trof remains along Vancouver Island. There was a ascatb pass at 05z with a swath across much of the offshore waters. The strongest winds were along the inner waters of the nrn CA waters and associated with the nrn CA coast trof where winds were to 30 kt. Another area of winds to 25 kt were over the outer waters of the WA/OR offshore in enhanced nly winds W of the Vancouver Island trof.
Model guidance shows the high pressure to the W of the waters becoming weaker later today and shifting SW on Tue. The enhanced nly winds diminish later today across the nrn offshore waters first across the inner waters, then over the outer waters by tonight. With the N CA coast trof becoming weaker later today through tonight. Coastal trof near Vancouver Island redevelops Tue night with enhanced winds over the WA waters Wed through early Fri. A weakening cold front moves E over the WA/OR waters Wed and dissipates. Models do agree with the nrn CA coast trof intensifying from about Thu through Fri night as a broad large area of high pressure builds in from the W.
.Seas...Seas were between 5 to 9 ft with peak values near the nrn CA coast and over the nrn WA offshore waters. These values were close the wwii enp and ECMWF wam. Plan to use a 50/50 blend of these models through the forecast period.
.Extratropical storm surge guidance...N/A.
.Pz5 Washington/Oregon waters... None.
.Pz6 California waters... None.
.Forecaster Rowland. Ocean prediction center.