North Pacific Marine Weather Discussion

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AGPN40 KWNM 242120
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
220 PM PDT Sun Jun 24 2018

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

A cold front was slowly moving E over the WA/OR waters early this
afternoon and moves over the nrn and central CA waters before
dissipating later tonight. Buoy 46002 had NW winds to 20 kt with
passage of front. A coastal trof along central and nrn CA moves 
further inland later this afternoon and tonight. There was an
ASCAT pass at about 1730Z with a swath along the central and srn
CA waters. Strongest winds were to 25 kt over the central areas
where there was data. For later tonight into Mon a low pressure 
trof crosses the WA waters with light winds. A high pressure 
area builds across the nrn and central areas of the offshore 
tonight through Tue and then persists to the W of the waters Wed 
through Fri night as upper ridge strengthens to the W and along 
the waters. Coastal trof redevelops along the N and central coast
by late Mon night into Tue, then persists along the entire CA 
coast through Fri night. With the upper ridge that strengthens 
may have gales over the inner and central CA waters for Fri 
night. Will cap winds at 35 kt for Fri night and afterwards.

Seas...The 18Z analysis had seas to 12 ft over the central CA.
This may be a bit too generous, but seas will continue to subside
across this area as the coastal trof shifts further inland over
CA and high pressure builds E into the CA waters later tonight.
Will use a 50/50 blend of WWIII ENP and ECMWF wam through the
forecast period. The ECMWF wam is a bit higher with the seas than
the WWIII on Fri night, but with the blend seas will be lower.
 
.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 Friday night.
.PZZ825...Inner Waters from Point Arena to Pigeon Point...
     Gale Possible Friday night.

$$

.Forecaster Rowland. Ocean Prediction Center.