Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 040758
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1258 AM PDT FRI SEP 4 2015

.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 43N146W
WITH RIDGE EXTENDING NE INTO SW BRITISH COLUMBIA. WEAK LOW PRES
WAS OVER THE FAR SE WA WATERS AND A WEAK TROUGH ALONG THE
N/CENTARL CA WATERS. ASCAT PASS FROM LATE THU EVENING WITH VERY
GOOD COVERAGE OVER MOST OF OFFSHORE WATERS AND PART OF COASTAL
WATERS INDICATED WINDS MOSTLY 10 TO 20 KT. A SMALL AREA OF 25 TO
30 KT WINDS WAS NOTED OVER THE CENTRAL CA WATERS WITH THE 30 KT
WINDS CONFINED TO COASTAL WATERS.

THE 00Z MODELS CONTINUE TO BE IN DECENT AGREEMENT THROUGH MOST OF
THE UPCOMING FCST PERIOD FROM TODAY INTO MON...THEN DIVERGE MON
NIGHT AND BEYOND. FOR THE PERIOD TODAY THROUGH 09Z MON...MODELS
ARE ALL IN VERY GOOD AGREEMENT BUILDING THE HIGH PRES RIDGE E
WHILE AT THE SAME TIME INDICATING THE TROUGH ALONG THE CA COAST
WILL STRENGTHEN. THIS WILL RESULT IN MODERATE N TO NW WINDS OVER
THE N AND CENTRAL CA WATERS INTO THE FAR SRN OR WATERS THROUGH
MON. AT THIS TIME IT APPEARS WINDS WILL REMAIN JUST BELOW GALE
THRESHOLD...THOUGH BEST CHANGE FOR GALE WOULD BE OVER N CA COASTAL
WATERS. A WEAKENING COLD FRONT WILL PASS ACROSS THE PZ5 WATERS SAT
NIGHT INTO SUN...WITH WINDS AGAIN BELOW GALE. LOOKING AHEAD TO MON
NIGHT AND BEYOND...THERE CONTINUE TO BE DIFFERENCES WITH THE
HANDLING OF WHAT WILL BE THE REMNANTS OF TROPICAL STORM IGNACIO.
THE GFS CONTINUES TO BE A FAST OUTLIER COMPARED TO THE
ECMWF/UKMET/CMC. THE OFFICIAL CPHC FCST IS BETWEEN THE GFS AND
ECMWF POSITION. WITH THIS IN MIND...PLAN ON POPULATING GRIDS FROM
12Z MON THROUGH 09Z WED WITH A 50/50 BLEND OF ECMEF/GFS.
OTHERWISE...WILL POPULATE USING 00Z GFS 10M WINDS.

.SEAS...THE 06Z SEA STATE ANALYSIS INDICATED THAT OBSERVED SEAS
WERE WITHIN A FT OF THE MWW3. SIMILAR TO WIND GRIDS...WILL USE THE
MWW3 THROUGHOUT EXCEPT WILL USE A 50/50 BLEND FOR 12Z MON THROUGH
09Z WED.

.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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