Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 012002
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1202 PM PST SUN MAR 1 2015

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

THE 18Z SFC ANALYSIS INDICATED HIGH PRES CENTERED NEAR 46N146W
WITH RIDGE AXIS EXTENDING S. COLD FRONT WAS OVER THE FAR SE
PORTION OF THE S CA OFFSHORE WATERS WITH WEAKENING TROUGH ALONG
THE CA COAST. AN ASCAT PASS FROM 1746Z WITH LIMITED COVERAGE OVER
THE OFFSHORE AND COASTAL WATERS INDICATED AN AREA OF 25 TO 30 KT
WINDS OVER THE N CA WATERS EXTENDING SW TO THE CENTRAL CA WATERS.

THE 12Z MODELS CONTINUE TO BE IN VERY GOOD AGREEMENT THROUGH THE
FCST PERIOD. THE HIGH PRES RIDGE CURRENTLY ALONG 140W WILL REMAIN
IN PLACE THROUGH TUE NIGHT...THEN SLOW SHIFT E AS LOW PRES PASSES
WELL W OF THE AREA BETWEEN 140W AND 150W WED INTO EARLY FRI. THE
TROUGH ALONG THE COAST WILL BRIEFLY STRENGTHEN MON INTO MON NIGHT
AS SHORT WAVE MOVES S ALONG THE COAST. THE TROUGH WILL THEN WEAKEN
TUE THROUGH FRI WHICH WILL ALSO LEAD TO THE N WINDS DIMINISHING
OVER THE N/CENTRAL CA WATERS. THE GFS 30M WINDS STILL CONTINUE TO
INDICATE WINDS BRIEFLY REACHING MINIMAL GALE MON MORNING OVER THE
N/CENTRAL CA WATERS...HOWEVER ALL THE OTHER MODELS KEEP WINDS JUST
BELOW GALE SO PLAN ON USING THE GFS 10M WINDS THROUGHOUT. THIS
WILL RESULT IN NO WARNING HEADLINES.

.SEAS...THE 18Z SEA STATE ANALYSIS INDICATED THAT OBSERVED SEAS
CONTINUE TO MATCH UP WELL WITH THE MWW3/ECMWF WAM FCST VALUES. IT
STILL LOOKS LIKE A 50/50 BLEND OF MWW3/ECMWF LOOKS
BEST...ESPECIALLY EARLY IN THE PERIOD AS ECMWF LOOKS A LITTLE TOO
HIGH WITH SEAS OVER THE N/CENTRAL CA WATERS WHILE THE MWW3 APPEARS
TO BE TOO LOW. FROM ABOUT 00Z WED AND BEYOND THERE IS NOT MUCH
DIFFERENCE IN SEAS BETWEEN THE TWO MODELS.

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


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER KOSIER. OCEAN PREDICTION CENTER.


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