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AGPN40 KWNM 291537

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
837 AM PDT Thu Jun 29 2017

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

Geocolor satellite images show clouds with warm tops over most
of the region. The latest observations indicate relatively high
winds over the eastern portion of the central waters. At 1200Z
the NCEP map has high pressure center 1024 MB just west of the
central waters and has its ridge into the northern waters.
Inland low pressure over north California has a trough stretching
southeast near the coast into southern California. Gradient is
just tight over the central waters.

Highest seas are over the central waters with a peak at 10 ft.
NWW3 and ECMWFWAVE models fits well the observed seas [pattern
and they have been quite consistent in the previous runs. Will
stay with NWW3 for this update.

The models are in still good agreement and so will stay with
just GFS with just minor changes. In the short term the high
pressure will remain to the west and maintain a weak ridge across
the north waters. The inland trough will slightly strengthen.


The most recent ASCAT pass shows mainly nw winds 15-25 kt across
the offshore waters. Just West of the area is a ridge axis. An
altimeter pass from 04Z indicates seas 5-7 ft across the western
portion of region. The 00Z global models are all in very good
agreement during the upcoming week for the offshore waters as the
overall pattern is quite stable. The typical summertime
ridge/trough setup will continue to prevail along the California
coast, while a weaker NW flow persists across the PZ5 waters. A
N/S ridge axis will shift very slowly eastward over the next
couple of days until building across the region. The maximum
winds I am expecting over the inner California offshore waters at
this time is 30 kt, although gales are possible in the coastal
zones along the northern and central California coast. I will
populate the winds grids using the 10M GFS throughout the
forecast period.

seas...both the WAM and ENP initialized well over the region and
appear reasonable throughout the forecast period. I will
populate the wave grids using the ENP during the upcoming week.

Extratropical Storm Surge Guidance: n/a.


.PZ5 Washington/Oregon Waters...

.PZ6 California Waters...


.Forecaster Musonda/Shaw. Ocean Prediction Center. is the U.S. government's official web portal to all federal, state and local government web resources and services.