marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 219 am PDT Tue Sep 30 2014
.Forecast discussion: major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.
Latest scat pass from 05z indicates mainly NW winds 10-20 kt across entire offshore waters...although large swath of missing data ovr much of CA waters. Large swath of 25-30 kt winds are occuring ovr glfak W of 140w in broad NW flow. Seas in thar area are also running a few ft higher thatn ww3. Recent obs show wave hgts generally 5-9 ft over waters. The overall pattern hasnt changed much during the past several days...and the forecast from all the models are pretty consistant and in good agreement throughout the period. The problem of the day will occur along the central and nrn CA CST over the next day or so as the gradient is expected to tighten and produce marginally gale conditions across ptns of the inner CA offshore waters. When pop the grids will use the 10m GFS throughout the period...the exception being ovr three of the inner CA offshore waters where the gradient will be the strongest. Across that region I will use a 50/50 blend of the 10m GFS and 30m GFS...in order to bump up the winds a bit. Will also further increase winds slightly in order to reach gale over that area. The wave output from the ww3 generally looks pretty good throughout and little adjustments are needed.
Extratropical storm surge guidance...N/A.
.Pz5 Washington/Oregon waters... None.
.Pz6 California waters... .pzz820...inner waters from point St. George to Point Arena... gale tonight into Wed. .Pzz825...Inner waters from Point Arena to Pigeon Point... gale tonight into Wed. .Pzz830...Inner waters from Pigeon Point to Point Piedras Blancas... gale tonight.
.Forecaster Shaw. Ocean prediction center.