

757 

AGPN40 KWNM 170758

MIMPAC



MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN

NWS OCEAN PREDICTION CENTER WASHINGTON DC

1258 AM PDT WED AUG 17 2016



.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT

.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.



THE 06Z SFC ANALYSIS INDICATED HIGH PRES CENTERED NEAR 42N141W

WITH RIDGE EXTENDING N INTO GULF OF AK ALONG 140W. TROUGH EXTENDED

ALONG THE CA COAST N TO FAR SRN OREGON COAST. ASCAT PASS FROM LATE

TUE EVENING MISSED THE S OREGON/N CA COASTAL AND E PORTION OF

OFFSHORE WATERS...HOWEVER RSCAT PASS FROM 0348Z DID INDICATE AREA

OF GALES OVER S OREGON AND N CA COASTAL WATERS EXTENDING TO BORDER

OF COASTAL/OFFSHORE WATERS...WITH LARGE AREA OF 30 KT COVER MOST

OF INNER PORTION OF N CA AND S OR WATERS.



THE 00Z MODELS CONTINUE TO BE IN EXCELLENT AGREEMENT DURING THE

ENTIRE FCST PERIOD. THE MAIN FOCUS IS DURING THE SHORT TERM PERIOD

THROUGH LATE TONIGHT...MAINLY OVER THE N CA WATERS. THE 00Z

GFS/UKMET/ECMWF AND GEM CONTINUE TO INICATE GALES EXPANDING INTO

THE N CA OFFSHORE WATERS TODAY AND CONTINUING INTO THIS EVENING

BEFORE DIMINISHING ALL AREAS BY THU MORNING. OVERALL...THE GFS 10M

WINDS LOOK REASONABLE AND PLAN ON USING THESE TO POPULATE THE WIND

GRIDS DURING THE PERIOD. THIS WILL RESULT IN NO CHANGES TO

EXISTING WARNING HEADLINES. LOOKING AHEAD TO THU AND BEYOND...THE

LOW PRES OVER N CA INTERIOR WILL WEAKEN WHILE HIGH PRES OFFSHORE

ALSO WEAKENS. THIS WEAKER GRADIENT WILL RESULT IN WINDS REMAINING

BELOW GALE FROM THU THROUGH THE END OF PERIOD. 



.SEAS...THE 06Z SEA STATE ANALYSIS INDICATED THAT OBSERVED SEAS

CONTINUE TO MATCH UP WELL WITH THE MWW3/ECMWF WAM GUIDANCE AND

WERE WITHIN A FT OF THE OBS. BUOY 46244 NW OF EUREKA WAS REPORTING

12 FT AS OF 06Z...AND WENT WITH 13 FT MAX ON ANALYSIS. PLAN ON

USING THE MWW3 TO POPULATE THE WAVE GRIDS THROUGH THE PERIOD AS IT

IS CLOSE TO THE EMCWF WAM VALUES. 



.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 EARLY TODAY INTO TONIGHT. 



$$



.FORECASTER KOSIER. OCEAN PREDICTION CENTER.

