Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 301505
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
805 AM PDT TUE JUN 30 2015

.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.

PER 12Z OPC SFC ANALYSIS A HIGH PRES RIDGE WAS OVER THE PZ5/PZ6
WATERS WHILE A LOW PRES TROUGH WAS INLAND OVER CA. FOR THIS
INTERMEDIATE UPDATE WILL NOT MAKE SIGNIFICANT CHANGES TO THE
ONGOING FORECAST.

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PREVIOUS DISCUSSION...

LATEST ALTIMETER PASS FROM 04Z SHOWS SEAS ACROSS OFFSHORE WATERS
MAINLY 3-6 FT. ASCAT PASS FROM SIMILAR TIME SHOWS WINDS GENERALLY
NRLY 10-20 ACROSS ENTIRE REGION WITH MAX WINDS ACROSS CENTRAL CA
WATERS. THE OVERALL FORECAST PATTERN HASNT CHANGED MUCH OVER THE
PAST SEVERAL DAYS AND THE SCENERIO REMAINS THE SAME. STRONG HIGH
PRES WILL BUILD W OF THE WATERS AS A LOW PRES TROF STRENGTHENS
ALONG THE NRN CA CST. THIS WILL INDUCE GALE GALE CONTIIONS ACROSS
INNER PORTIONS OF NRN CA WATERS TUE INTO TUE NIGHT. A SECOND FOCUS
WILL OCCUR ALONG VANISL AS A LOW PRES TROF FORMS THERE FRI INTO
SAT AND HIGH PRES CONTINUES TO BUILD N..W OF THE REGION. MY
CONFIDICENCE LEVEL IS HIGH FOR BOTH GALE SCENERIOS. THE GRADIENT
ACROSS THE SRN PORTION OF THE CA WATERS WILL REMAIN RELATIVELY
WEAK THROUGHOUT THE PERIOD AS A GENERAL TROFFINESS PERSISTS THERE.
NO FRONTS OF ANY MAGNITUED WILL BE EFFECTING THE REGION THI WEEK.
THE GLOBAL MODELS FROM THE 00Z CYCLE ARE IN GOOD AGREEMENT...IN
PARTICULAR THE GFS/ECMWF. WILL POP THE WIND GRIDS USING A 50/50
BLEND OF THE 10M/30M GFS...WHICH PROVIDES A GOOD SFC WIND SPEED
OVR AREA. SOME MINOR GRID EDITS MAY BE NEEDED IN ORDER TO
MAINTAIN CONTINUITY AS CLOSE POSSIBLE TO PRV FCST

SEAS...BOTH ENP AND ECMWF WAVE GUID ARE VIRTUALLY THE SAME WITH
ONLY MINOR DIFFERENCES...WILL POP WAVE GRIDS USING ENP THROUGHOUT
THE TIME PERIOD

.EXTRATROPICAL STORM SURGE GUIDANCE...N/A.


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE POSSIBLE FRI INTO SAT.
.PZZ900...OUTER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE POSSIBLE FRI INTO SAT.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE TONIGHT.

$$

.FORECASTER HOLLEY/SHAW. OCEAN PREDICTION CENTER.



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