Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 172210
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
210 PM PST WED DEC 17 2014

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

AT 18Z WKNG LOW W OF PT ST GEORGE IS ABT TO ENTER NRN CA WTRS WITH
TREND OF RECENT ASCAT PASSES INDICATING LOW IS SUBGALE AND BASED
ON 12Z GFS 10M WNDS EXPECTING WNDS AS HIGH AS 25 OR 30 KT COULD
OCCUR S OF THIS LOW AND AHD OF FNT OFF NRN CA EARLY TONIGHT BEFORE
LOW DISSIPATED. 12Z MDLS SPRT THIS TREND. WK GRADIENTS PREVAIL IN
PZ5 WTRS AND SRN CA AREA DUE TO WK RIDGING. STRONG FNTL SYSTEM
ASCD WITH A STORM FORCE LOW NEAR 49N159W IS EXPECTED TO APCH PZ5
AREA FM W TONIGHT WITH HI CONFDC GALES NRN HALF OF PZ5 OUTER WTRS
LATER TONIGHT AND SHIFT E WITH FNT TO ERN ZONES LATER THU. WNDS
MAY REACH 45 KT THU IN FAR N PZ5 AREA WITH STORM FORCE IN MORE
CHANNELED FLOW N OF AREA. FNT EXPECTED TO WKN INLAND THU NIGHT
WITH TRAILING PORTION WKNG OVR CENTRAL AND N CA WTRS THU NIGHT
INTO FRI. ATTM EXPECT GALES NOT TO EXTEND S INTO CA WTRS WHERE
THERE ARE NO HEADLINES. WK RDG AND LIGHT WNDS ACRS SRN CA WTRS
THRU THU NIGHT WL BUILD INTO NRN CA WTRS AND FAR SE PZ5 AREA FRI
AHD OF NEXT STRONG FNTL SYSTEM. THIS FNT OF SIMILAR STRENGTH TO PREVIOUS
FNT IS EXPECTED TO CROSS PZ5 AREA FIRST AS A STG WARM FNT LATE FRI
NIGHT INTO SAT THEN FOLLOWED BY A CDFNT APCHG FRM NW SAT NIGHT.
THEN AS UPR AIR FLOW BCMS MORE ZONAL WITH TREND OF A BROAD RDG TO
DVLP IN E PAC FNT IS EXPECTED TO STALL IN PZ5 AREA LATER SUN INTO
SUN NIGHT AS SFC RDG OVR CA WTRS BUILDS N. HAVE MDT TO HI CONFDC
IN GALES WITH WRMFNT BUT ONLY LOW TO MDT WITH PSBL SW GALE
PORTIONS OF OUTER PZ5 WTRS WITH CDFNT. GALES NOT EXPECTED AFTER
SAT AS WNDS SLOLY DMSH WITH BLDG RDG. RDG CONTG INTO MON NIGHT AS
A WK LOW FORMS W OF PZ5 WTRS AND MOVS NE...PUSHING FNT N AS WK
WARM FNT.

POPULATED WNDS WITH 12Z GFS 10M WNDS WITH MINOR EDITS THRU THU
WITH DVLPG SLY FLOW AND AGAIN LATE SAT AND BYND AS MORE STABLE
CONDFS DVLP WITH SW FLOW NRN WTRS AND DVLPG RDG. IN BETWEEN
TRENDED WNDS HIGHER TWD 30M GFS WNDS WITH STG FRONTS. 12Z GFS
BASICALLY SPRTD BY OTHER GLOBAL MDLS WITH MAIN DIFFERENCE ASCD
WITH PSNS OF SERIES OF LOWS MOVG INTO GLF OF AK.

SEAS...12Z ENP WW3 IS IN GOOD AGRMT WI 1-2 FT OF 18Z SEA STATE
ANAL AND 21Z DATA AND ECMWF WAM IS SIMILAR...THRU THU NIGHT...THEN
TRANSITIONED TO 50/50 PCT MDL BLEND FRI WHEN LARGER MDL
DIFFERENCES DVLP ESPCLY IN NRN WTRS.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE THU.
     GALE POSSIBLE FRI NIGHT.
.PZZ900...OUTER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE TONIGHT INTO THU.
     GALE POSSIBLE FRI NIGHT.
.PZZ805...INNER WATERS FROM CAPE SHOALWATER TO CAPE LOOKOUT...
     GALE THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.
.PZZ905...OUTER WATERS FROM CAPE SHOALWATER TO CAPE LOOKOUT...
     GALE TONIGHT INTO THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.
.PZZ810...INNER WATERS FROM CAPE LOOKOUT TO FLORENCE OR...
     GALE THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.
.PZZ910...OUTER WATERS FROM CAPE LOOKOUT TO FLORENCE OR...
     GALE THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.
.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.
.PZZ915...OUTER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE THU.
     GALE POSSIBLE FRI NIGHT INTO SAT.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER BANCROFT. OCEAN PREDICTION CENTER.


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