Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 191011
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
311 AM PDT SAT APR 19 2014

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

06Z OPC SFC ANALYSIS SHOWS HIGH PRES RIDGING NE ACRS CENTRAL CA
WTRS AND INTO PAC NW STATES WHILE A STG FNTL SYSTEM...ASCD WITH
970 MB HURCN FRC LOW TO THE W NR 50N140W...ENTERS OUTER WTRS NRN
CA NWD. 0608Z MOST RECENT ASCAT-B PASS SHOWS WNDS 33 TO 42 KT IN
OUTER WTRS N OF CAPE LOOKOUT...AND 20 TO 30 KT ELSW NRN AND WRN
PZ5 AREA. TO THE S RDG OFFSHORE AND INLAND TROF COMBINING TO
PRODUCE NW WNDS AS HIGH AS 23 KT IN GUSTS FM BUOYS PT CONCEPTION
AREA. OTHER AREA OF WNDS 35 KT OR HIGHER FM SW OR W APPRS W OF
AREA ON S SIDE OF LOW BUT BOTH ASCAT-A AND B MISS THE HIGEST WNDS.
BUOY 46036 REPORTING SSW G 33 KT JUST BHND FNT.W OF WA WTRS HAS
RECENT OBS GUSTING TO 37 KT WITH SUSTAINED WNDS APCHG GALE FRC.
GUSTS TO 27 KT NOTED AMONG BUOYS OFF CNTRL AND SRN CA CST. OBSVD
WNDS IN OFSHR AREAS APPR BEST REPRESENTED BY 00Z GFS 10M WNDS,
CURRENT FCST APPRS ON TARGET. WILL NEED TO WATCH FOR PSBL WLY
GALES BHND FNT GETTING INTO NW PZ5 WTRS AS HINTED AT BY 12Z
ECMWF/UKMET BUT 00Z RUNS APPR MORE FOR KEEPING THEM TO THE
W...LIKE 00Z GFS AND EARLIER RUNS. 00Z GFS HAS REMAINED CONSISTENT
AND IS SPRTD BY OTHER MDLS THRU TUE...WHEN REMNANT OF STORM
CURRENTLY OUT THERE IS EXPECTED LOOP BACK TWD PZ5 AREA AND DSIPT
OVER WTRS TUE NIGHT. MDLS DIVERGE AFTER THAT WITH GFS SPLITTING
ENERGY WITH ONE WAVE MOVG OVR DVLPG UPR RDG APCHG PZ5 WTRS EARLY
WED WITH ANOTHER ONE OUT NR 145W WHILE ECMWF/UKMET/GEM OFFER
INTERMEDIAT SOLN OF ONE LOW AND FNT. USED 00Z GFS THRU 00Z WED
THEN 00Z ECMWF THRFTR...SPRTD BY OTHER FOREIGN MDLS. FNTL SYSTEM
TO W AT 12Z WED IS EXPECTED TO MOV INTO NRN WTRS WED NIGHT. THIS
IS SIMILAR TO PREVIOUS SYNOPSIS AND SIMILAR TO WPC PRELIM DAY 4/5
GUIDANCE.

TO THE S A RDG IS EXPECTED TO DOMINATE...ESPCLY CENTRL AND SRN CA
WTRS WITH TREND TWD BLDG BACK TWD THE E MON NIGHT INTO WED. NEW
GRIDS KEEP WNDS AT 30 KT OR LESS BUT 00Z GFS SHOWS SML AREA OF
GALES NR CHANNEL ISL IN CSTL WTRS BASED ON 10M WNDS...BUT GFS HAS
BACKED OFF ON DURATION AND STRENGTH OF GALES.

.SEAS...FAVORED 00Z NWW3 INITIALLY WHICH IS CLOSE TO OBSVD
CONDS...BUT LATER TODAY WHEN MDLS DVLP DIFFERENCES OF A FEW FT IN
NRN AND CNTRAL WTRS USED 50/50 BLEND OF 00Z NWW3 AND ECMWF
WAM OUT TO 15Z MON AND ALL ECMWF TUE NIGHT AND BYND. IN BTWN THOSE
PERIODS USED 00Z NWW3.

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

.WARNINGS...PRELIMINARY. ANY CHANGES WILL BE COORDINATED THROUGH
AWIPS 12 PLANET CHAT OR BY TELEPHONE:

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE EARLY TODAY.
.PZZ900...OUTER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE EARLY TODAY.
.PZZ905...OUTER WATERS FROM CAPE SHOALWATER TO CAPE LOOKOUT...
     GALE EARLY TODAY.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER BANCROFT. OCEAN PREDICTION CENTER.



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