Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 050802
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
102 AM PDT SAT SEP 5 2015

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

THE 06Z SFC ANALYSIS HIGH PRES CENTERED NEAR 41N145W WITH RIDGE
EXTENDING E. WEAK TROUGH WAS ALONG THE CA COAST...WITH WARM FRONT
JUST NW OF THE WA OFFSHORE WATERS. A LATE EVENING ASCAT PASS
INDICATED THAT WINDS WERE MOSTLY 20 KT OR LESS OVER THE
OFFSHORE/COASTAL WATERS...HOWEVER THERE WAS AN AREA OF 25 TO 30 KT
WINDS NOTED OVER THE N AND CENTRAL CA COASTAL WATERS AND FAR E
PORTION OF OFFSHORE WATERS ROUGHLY FROM POINT ARENA S TO POINT
PIEDRAS BLANCAS.

THE 00Z MODELS CONTINUE TO BE IN VERY GOOD AGREEMENT THROUGH THE
ENTIRE FCST PERIOD...WITH SOME DIFFERENCES NOTED LATER TUE INTO
WED NIGHT WITH HANDLING OF REMNANTS OF IGNACIO. FOR TODAY THROUGH
MON NIGHT...ALL THE MODELS IN AGREEMENT WITH MOVING THE HIGH
MENTIONED ABOVE SLOWLY E WHILE TROUGH GRADUALLY STRENGTHENS ALONG
THE CA COAST. THIS WILL RESULT IN THE STONGEST WINDS...MAINLY IN
THE 25 TO 30 KT RANGES OVER THE N/CENTRAL CA COASTAL WATERS. THE
MODELS CONTINUE TO INDICATE WINDS REMAINING BELOW GALE...ALTHOUGH
SOME GUSTS TO NEAR GALE NOT OUT OF THE QUESTION OVER COASTAL
WATERS MAINLY DURING THE EVENING AND NIGHTIME HOURS SUN NIGHT AND
MON NIGHT. A WEAK COLD FRONT WILL PASS ACROSS THE WA/OR WATERS
LATER TONIGHT INTO SUN WITH WINDS REMAINING WELL BELOW GALE.
LOOKING AHAD TO TUE AND BEYOND...THE GFS HAS TRENDED CLOSER TO THE
ECMWF/UKMET/CMC WITH THE TRACK OF FORMER IGNACIO...HOWEVER THE GFS
CONTINUES TO BE FURTHER S COMPARED TO THE OTHER MODELS PASSING
CLOSER TO THE WA OFFSHORE WATERS. FOR THIS REASON...PLAN TO USE
THE 00Z ECMWF FROM 12Z TUE AND BEYOND. OTHERWISE...WILL USE THE
GFS 10M WINDS.

.SEAS...THE 06Z SEA STATE ANALYSIS INDICATED THAT OBSERVED SEAS
WERE ABOUT ONE TO TWO FT HIGHER THAN THE MWW3 OVER THE CENTRAL CA
WATERS...OTHERWISE OBSERVED SEAS MATCHED UP WELL WITH THE MODEL.
SIMILAR TO WIND GRIDS...WILL USE THE MWW3 THROUGH 09Z TUE...THEN
WILL TRANSITION TO ECMWF WAM.

.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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