Marine Interpretation Message
Issued by NWS
AGPN40 KWNM 252113
Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
113 PM PST Sat Feb 25 2017
.FORECAST DISCUSSION...Major features/winds/seas/significant
.weather for the North Pacific N of 30N and E of 150W.
The most recent satellite pictures shows a low center moving
southward into the central California waters. West of central
California waters is a gale center that is slowly weakening. The
ASCAT pass from 18z indicates mainly winds 20 kt or less across
the entire offshore waters. During the upcoming week the 12z
global models are all in very good agreement. Over the next 24
hours the weak low center will continue to track SE across the
waters before moving inland and dissipating near point
conception. A short wave will then move southward to along the
Washington and Oregon coasts bringing 20-30 kt winds across the
region as far south as the northern California waters. Later in
the week a high pressure ridge will build eastward with the axis
stretching across the northern California region...while a low
pres trough expands north along the California coast. This will
bring a change of pattern to a more traditional west coast
regime. I will populate the wind grids using the GFS throughout
the forecast period,,,using 30m in areas of instability, There
is a moderate chance for gales later tonight into sun in the
northerly flow...especially cross the western portion of the
Washington and Oregon waters...however I have opted to keep winds
sub gale at this time.
Seas...both the ENP and WAM initialized OK across the region. The
WAM is forecasting slightly higher values over the next couple
of days or see than the ENP. This seems reasonable...therefor I
will populate the wave grids using a blend of two thirds WAM and
one third ENP throughout the forecast period.
.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.
.PZ5 Washington/Oregon Waters...
.PZZ905...Outer Waters from Cape Shoalwater to Cape Lookout...
.PZ6 California Waters...
.Forecaster Shaw. Ocean Prediction Center.