

874 

AGPN40 KWNM 231957

MIMPAC



MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN

NWS OCEAN PREDICTION CENTER WASHINGTON DC

1257 PM PDT TUE AUG 23 2016



.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 48N135W

WITH RIDGE EXTENDING N ALONG SE COAST OF ALASKA AND SE ACROSS W

PORTION OF CA OFFSHORE WATERS. AN ASCAT PASS FROM 1752Z INDICATED

SEVERAL SMALL AREAS OF 25 KT OVER THE N CA OFFSHORE WATERS...AS

WELL AS THE SRN OREGON COASTAL WATERS. OTHERWISE...WINDS WERE 20

KT OR LESS. 



THE 12Z MODELS REMAIN IN VERY GOOD AGREEMENT DURING THE FCST

PERIOD WITH ONLY SUBTLE DIFFERENCES NOTED WITH THE SFC PRES

PATTERN. THE HIGH PRES MENTIONED ABOVE WILL MOVE N TONIGHT INTO

WED MORNING WHILE STRENGTHENING...THEN MOVE W THROUGH THE END OF

THE WEED AND INTO SAT WHILE CONTINUING TO STRENGTHEN SLIGHTLY

BEFORE WEAKENING LATE FRI. MEANWHILE TROUGH ALONG THE CA COAST

WILL EXPAND N ACROSS THE OREGON/WASHINGTON COASTS THROUGH EARLY

FRI BEFORE WEAKENING. GRADIENTS WILL BE SUCH THAT WINDS WILL

REMAIN BELOW WARNING CRITERIA THROUGH THE PERIOD...WITH THE

STRONGEST WINDS LIKELY TOPPING OUT NEAR 30 KT LATE FRI OVER THE

INNER PORTION OF WA WATERS. OTHERWISE...EXPECT 20 TO 25 KT WINDS

OVER THE WA/OR WATERS ESPECIALLY THE OUTER WATERS WITH WINDS OVER

THE CA WATERS MOSTLY 20 KT OR LESS. 



.SEAS...THE 18Z SEA STATE ANALYSIS INDICATED THAT OBSERVED SEAS

COTNINUE TO MATCH UP WELL WITH THE MWW3. WILL POPULATE WAVE GRIDS

USING THE MWW3 THROUGH THE PERIOD AS THERE ARE NO MAJOR

DIFFERENCES COMPARED TO THE ECMWF WAM. 



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



.WARNINGS...PRELIMINARY.



.PZ5 WASHINGTON/OREGON WATERS...

     NONE.



.PZ6 CALIFORNIA WATERS...

     NONE.



$$



.FORECASTER KOSIER. OCEAN PREDICTION CENTER.

