marine weather discussion for N Pacific Ocean NWS ocean prediction center Washington DC 636 PM PST Tue Dec 12 2017
.Forecast discussion...Major features/winds/seas/significant .Weather for the North Pacific N of 30n and E of 150w.
The latest model guidance indicates that a high pressure ridge is currently causing mainly light winds across most of the offshore waters. A weak cold front will move into the pz5 waters by Thursday, then dissipate Thursday night. Another front will then move into the pz5 waters by Saturday. Farther south, northerly winds will increase to 30 knots off of northern California by late Friday as strong high pressure builds west of the offshore waters. Winds will come close to gale force off of northern and central California Friday night into Saturday night, but for now will keep the strongest winds at 30 knots and see what the later model runs show. These conditions will then diminish somewhat by late Sunday. For wind grids will continue to use the current grids throughout the forecast period. Current forecast looks reasonable and will continue to carry no warnings across the offshore waters.
For wave height grids will also continue to use the current grids throughout the forecast period.
Extratropical storm surge guidance...N/A.
----------------------------------------------------------------- Previous discussion...
The 18z surface analysis continues to show a dissipating stationary front across the waters. This should dissipate over night tonight.
Overall, 12z model agreement is fairly good and consistent with the previous forecasts. GFS appears to be a good solution to the forecast, so will continue using it for the forecast through this package. No headlines are expected throughout the forecast period.
.Seas...Will use the wavewatch throughout the forecast for the same reasoning as the winds.
.Extratropical storm surge guidance...N/A
.Pz5 Washington/Oregon waters... None.
.Pz6 California waters... None.
.Forecaster nolt/Sommerville. Ocean prediction center.