Marine Interpretation Message
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AGPN40 KWNM 240930
MIMPAC

Marine Weather Discussion for N Pacific Ocean
NWS Ocean Prediction Center Washington DC
230 AM PDT Mon Apr 24 2017

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

There was an ASCATB pass at around 0445Z and an ASCAT pass at
0530Z with max winds over the srn CA waters with winds to 30 kt.
Elsewhere winds were to 25 kt over the OR/nrn CA waters.

At 06Z surface analysis maintains a high pressure area to the W
of the central and srn CA waters. Low pressure has moved E into
the WA/OR waters with a cold front trailing SW through the OR/nrn
CA waters. As the cold front moves S over the central CA waters
and dissipates gales should develop over the inner srn CA waters
by early tonight. The low pressure moves E and inland over the OR
coast later this morning and early afternoon. Winds in
association with the low pressure and cold front should have
winds to 30 kt this morning...and drop off as the low pressure
moves inland. For the srn areas of CA waters Gales should become
persistent and more widespread later this week as an upper
shortwave moves S along the W coast later on Thu and develops and
moves S near the srn CA coast Fri and Fri night.

For the grids will favor the GFS initially today through early
Wed, then will favor the UKMET/ECMWF which are stronger with the
area of high pressure that moves E and approaches the nrn and
central areas of the offshore waters Thu into Fri.

Seas... As was done previous will continue to use a blend of the
WWIII and ECWMF wam although with a 40/60 blend through the
forecast period.

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


.WARNINGS...Preliminary.

.PZ5 Washington/Oregon Waters...
     None.

.PZ6 California Waters...
.PZZ825...Inner Waters from Point Arena to Pigeon Point...
     Gale Possible Friday night.
.PZZ830...Inner Waters from Pigeon Point to Point Piedras Blancas...
     Gale Possible Friday into Friday night.
.PZZ835...Inner Waters from Point Piedras Blancas to Santa Cruz Island, CA...
     Gale Possible Friday into Friday night.
.PZZ840...Inner Waters from Santa Cruz Island, CA to San Clemente Island, CA...
     Gale tonight into Tuesday night.
     Gale Possible Wednesday into Friday night.
.PZZ940...Outer Waters from Santa Cruz Island, CA to 120W...
     Gale Possible Wednesday into Friday.
.PZZ945...Outer Waters from 120W to San Clemente Island, CA...
     Gale Possible Wednesday night into Friday.

$$

.Forecaster Rowland. Ocean Prediction Center.


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