marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 108 PM PDT Mon may 29 2017
.Forecast discussion...Major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.
At 18z a high pressure ridge was located across the pz5 and pz6 waters. Latest ascat high resolution imagery revealed 5-15 kt winds over the outer pz5/northwest pz6 waters with 15-25 kt winds over parts of the southern pz6 waters.
The 12z model package continued the good agreement seen in the last few runs so feel its reasonable to continue with existing grids in place which consist of the 00z GFS 10m winds over the forecast period. A weak cold front will move east over the Washington and Oregon offshore waters Wed and Wed night, followed by another weak cold front late Thu into early Fri. Otherwise, a high pressure ridge will prevail over the offshore waters through Tue then weaken Tue night into thurs night with the passage of the weak fronts through the northern waters which will weaken the ridge. Then as the associated low pressure system passing northwest of the waters lifts toward the northwest Fri and Fri night the ridge will build back northward over the waters.
.Seas...Will continue with existing grids in place which consist of a 50/50 blend of the 00z nww3/ECMWF wam over the forecast period.
.Extratropical storm surge guidance...N/A.
.Pz5 Washington/Oregon waters... None.
.Pz6 California waters... None.
.Forecaster Holley. Ocean prediction center.