Marine Interpretation Message
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110
AGPN40 KWNM 181354
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
554 AM PST Mon Dec 18 2017

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

No significant changes to the grids or headlines is expected in
the upcoming package. Latest model guidance still on track with
gales for the PZ5 waters Tue into Tue night.

SEAS...ENP within a foot or two of current observations.

-----------------------------------------------------------------
PREVIOUS DISCUSSION...

A low pressure trof along the California coast continues to
combine with high pressure west of the pz6 waters to produce
northerly winds up to 25 knots across northern portions of the
pz6 waters. These conditions will diminish tonight and by Monday
mainly light winds are expected across most of the pz6 waters. A
cold front is still expected to move southeast across the pz6
waters Tuesday into Wednesday night with winds up to 30 knots
behind the front. Farther north, a cold front will move across
the pz5 waters tonight, followed by low pressure Monday night and
Tuesday. Gale conditions are still expected across portions of
the pz5 waters as the low moves through. Gales will then continue
across portions of the pz5 waters Tuesday night into Wednesday
in the northwest flow behind the low. The latest runs of the gfs
and ecmwf look to be in reasonable agreement across the eastern
Pacific through Friday. For wind grids will use the gfs winds
throughout. Current warnings look reasonable and few changes
should be needed on the next offshore waters forecast.

For wave height grids will also use the ww3 throughout the
forecast period.

Extratropical storm surge guidance...The guidance is showing
surge values of 0.5 to 1 foot along the Washington and Oregon
coasts by Tuesday and this looks reasonable.



.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
.PZZ800...Inner Waters from Cape Flattery to Cape Shoalwater...
     Gale Tuesday into Tuesday night.
.PZZ900...Outer Waters from Cape Flattery to Cape Shoalwater...
     Gale Tuesday night into Wednesday.
.PZZ805...Inner Waters from Cape Shoalwater to Cape Lookout...
     Gale Tuesday into Tuesday night.
.PZZ905...Outer Waters from Cape Shoalwater to Cape Lookout...
     Gale Tuesday into Tuesday night.
.PZZ810...Inner Waters from Cape Lookout to Florence OR...
     Gale Tuesday.
.PZZ910...Outer Waters from Cape Lookout to Florence OR...
     Gale Tuesday.
.PZZ815...Inner Waters from Florence OR to Point St. George...
     Gale Tuesday.
.PZZ915...Outer Waters from Florence OR to Point St. George...
     Gale Tuesday.

.PZ6 California Waters...
     None.

$$

.Forecaster Achorn/Nolt. Ocean Prediction Center.



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