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North Pacific Marine Weather Discussion
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AGPN40 KWNM 271516
Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
816 AM PDT Thu Jul 27 2017
.FORECAST DISCUSSION...Major features/winds/seas/significant
.weather for the North Pacific N of 30N and E of 150W.
A very typical summer time pattern will prevail across the E
Pacific over the next several days. Combination of coastal low
pressure trough and E Pacific high pressure will generate
persistent n-ly winds over the OPC offshore waters. Should any
gales occur, best chance remains confined to within 60 nm of the
coast from near Cape Mendocino north to Point St George late in
Overall models remain in great agreement, see no reason to make
any changes to the ongoing forecast (00z GFS) already in place.
The latest surface analysis indicates that a high pressure ridge
west of the pz6 waters continues to combine with an inland low
pressure trof to produce northwest winds up to 25 knots or so
across portions of the northern and central pz6 waters. By late
Thursday winds are expected to increase to 30 knots with the
strongest conditions west of Point Arena. These conditions will
continue into Friday and then the strongest conditions will shift
farther north to off of Point Saint George by late Saturday.
Winds up to 30 knots are still expected across the offshore
waters by late Saturday with stronger conditions possible in the
coastal waters. These conditions will then remain in place
through Monday. Farther north, a weakening cold front will
approach the pz5 waters by Friday night and then dissipate by
Saturday. The latest runs of the gfs and ecmwf look to be in
reasonable agreement across the eastern Pacific through Monday.
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.
The nww3 looks reasonable with the seas and will be followed
fairly closely during the forecast period.
Extratropical storm surge guidance...n/a.
.PZ5 Washington/Oregon Waters...
.PZ6 California Waters...
.Forecaster Collins/Nolt. Ocean Prediction Center.