Marine Weather for HS 102


marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 735 am PDT sun may 20 2018

.Forecast discussion...Major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.

Some minor differences noted in the extended time frame with the latest GFS, but will leave forecast as is for now and wait until 12z models come in before making any changes to the extended forecast. Otherwise, do not plan on making any significant changes to the forecast at this time.

Seas...wave guidance within a foot or two of current observations. No major changes to the wave grids expected at this time.

----------------------------------------------------------------- Previous discussion...

A high pressure ridge west of the pz6 waters continues to combine with inland low pressure to produce northwest winds up to 25 or 30 knots off the coast of central and Southern California with the strongest conditions west of Point Conception. These conditions will continue into Monday, then the strongest winds will shift north to a position west of Cape Mendocino by Monday night. Mainly light winds are then expected across most of the offshore waters by Wednesday. Low pressure is still expected to develop west of the pz6 waters by Wednesday, then move towards the central and northern pz6 waters Thursday and Friday. The latest runs of the GFS and ECMWF look to be in reasonable agreement across the eastern Pacific through Friday. For wind grids will use the GFS 10m winds throughout. Current forecast looks reasonable and will continue to carry no warnings across the offshore waters during the forecast period.

For wave height grids will also use the nww3 throughout the forecast period.

Extratropical storm surge guidance...N/A.


.Pz5 Washington/Oregon waters... None.

.Pz6 California waters... None.


.Forecaster achorn/nolt. Ocean prediction center.

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