Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 031346
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
646 AM PDT WED JUN 3 2015

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

THE 12Z SFC ANALYSIS INDICATED HIGH PRES CENTERED NEAR 37N138W
WITH RIDGE EXTENDING E ONTO THE N CA WATERS. TROUGH EXTENDED N
ALONG THE CENTRAL AND N CA COAST. THE 06Z GFS AND NAM ARE BOTH
VERY SIMILAR TO THE PREVIOUS 00Z RUNS. WITH THE MODELS MAINTAINING
DECENT CONTINUITY...WILL NOT MAKE ANY SIGNIFICANT CHANGES FOR THE
MORNING UPDATE. IT STILL APPEARS WINDS SHOULD INCREASE TO GALE BY
LATE THU AFTERNOON AND CONTINUE INTO FRI EVENING...WITH A BRIEF
LULL FRI MORNING INTO THE AFTERNOON. THE 12Z SEA STATE ANALYSIS
INDICATED THAT OBSERVED SEAS WERE WITHIN A FT OF THE MWW3/ECMWF
WAM WAVE GUIDANCE.

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

00Z GLOBAL MODELS CONTINUE TO BE IN GOOD AGRMT THRU THE FCST
PERIOD. WILL POPULATE WIND GRIDS WITH 10M WINDS FROM THE 00Z GFS
THRU THE FCST PERIOD...WITH SOME MINOR MODIFICATIONS. 00Z GFS HAS
GOOD SUPPORT FROM BOTH THE 00Z ECMWF AND UKMET MODELS THRU THE
PERIOD.

MAIN WEATHER PLAYERS OVER THE NEXT SEVERAL DAYS WILL CONTINUE TO
BE THE EPAC HIGH AND ITS INTERACTION TO THE LOW PRES TROF OFF THE
CALIF COAST. MODELS CONTINUE TO SHOW A SLOW INCR IN GRADIENT INTO
WED NIGHT...WITH THE GRADIENT CONTINUING TO PEAK OUT IN THE THU TO
FRI TIME FRAME. LATEST GFS A TAD WEAKER WITH THE WINDS THAN IN
PREV RUNS...AND DID NOT INDICATE ANY GALES AT 10M OVER THE OFFSHR
WATERS THU OR FRI...BUT DID HAVE WINDS JUST BELOW GALE FORCE
DURING THE LATE AFTERNOON AND EVENING HOURS ON THU AND FRI. DID
MAKE SOME MINOR ADJUSTMENTS TO THE GRIDS TO BUMP THOSE WINDS TO
GALE FORCE...BUT WITH THE GFS SHOWING A SLIGHTLY WEAKER TREND WITH
THE WINDS THIS LAST RUN...CONFDC IN GALES IS NOT AS HIGH AS IT WAS
IN PREVIOUS NIGHTS. ALSO DECR AREA OF GALES A BIT IN THE SE
PORTION OF THE NRN CALIF AND NE PORTION OF THE CNTRL CALIF OFFSHR
WATERS FOR LATE THU AND THU NIGHT...AND FOR THE NE PORTION OF THE
NRN CALIF OFFSHR WATERS FOR LATE FRI INTO FRI NIGHT. GRADIENT
BEGINS TO RELAX LATE FRI NIGHT AND INTO SAT AS THE HIGH BEGINS TO
DRIFT TO THE NW.


.SEAS...ENP VERSION OF WWIII WITHIN A FT OR TWO OF CURRENT OBS.
POPULATE WAVE GRIDS FROM 00Z ENP THRU 12Z SAT...THEN SWITCHED OVER
TO THE 00Z ECMWF WAVE THEREAFTER AS ENP BRINGING IN SLY SWELLS
FROM A TROPICAL SYSTEM WELL S OF THE AREA A BIT EARLY. DID ALSO ADJUST
SEAS UP IN THE GALE AREA BY ABOUT 10 PERCENT THU AND FRI.


.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 THU INTO THU NIGHT.
     GALE POSSIBLE FRI INTO FRI NIGHT.
.PZZ825...INNER WATERS FROM POINT ARENA TO PIGEON POINT...
     GALE THU INTO THU NIGHT.

$$

.FORECASTER KOSIER/ACHORN. OCEAN PREDICTION CENTER.


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