Marine Interpretation Message
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000
AGPN40 KWNM 210938
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
138 AM PST Thu Feb 21 2019

.FORECAST DISCUSSION...Major features/winds/seas/significant
.weather for the North Pacific N of 30N and E of 150W.

High pressure will remain to the west of the region as a coastal
trough strengthens along the California coast in the short term.
Pressure gradient will become tight and that will generate gale
force winds over the central waters. High pressure will weaken to
the west and allow pressure gradient to relax and winds to
diminish to below gale force in the extended period. Latest NCEP
weather map has a cold front across the central California waters
with high pressure 1036 MB centered near 43N145W. Pressure
gradient is fairly relaxed. The front will weaken and dissipate
as a coastal trough develops along the California coast.

In the upper levels at 500 MB, models show significant energy
along the coast while a strong high pressure ridge lies just west
of the region. In the short term, the ridge will shift east and
that will support a surface high pressure to remain to the west
of the forecast waters. The ridge will then weaken and relax the
pressure gradient. Global models have initialized well the latest
surface synoptic observations and they all agree well high
pressure to the west of the region. Will stay with GFS for winds.

.SEAS...are relatively large over the northern waters with a peak
at 17 ft. Seas range between 12 and 15 ft over the northern half
and they range between 7 and 12 ft over the rest of the waters.
NWW3 fits well the observed seas pattern and is also very close
to ECMWFWAVE model. Both wave models have a general agreement in
the short term on keeping large seas over the northern waters
then spread into the central waters. Will stay with NWW3 for
seas.


.EXTRATROPICAL STORM SURGE GUIDANCE...n/a.


.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
.PZZ820...Inner Waters from Point St. George to Point Arena...
     Gale Possible Sunday night.
.PZZ920...Outer Waters from Point St. George to Point Arena...
     Gale Possible Sunday night.
.PZZ825...Inner Waters from Point Arena to Pigeon Point...
     Gale today.
.PZZ830...Inner Waters from Pigeon Point to Point Piedras Blancas...
     Gale today.

$$

.Forecaster Musonda. Ocean Prediction Center.


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