Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 281358
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
558 AM PST SAT FEB 28 2015

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

NO CHANGES ARE PLANNED FOR THE MORNING UPDATE. THE 06Z GFS WAS
VERY SIMILAR TO THE PREVIOUS 00Z GFS...AND WAS ALSO IN GOOD
AGREEMENT WITH THE OTHER 00Z GLOBAL MODELS. THE CURRENT WARNING
HEADLINES ALSO LOOK GOOD AS COMBINATION OF LOW PRES MOVING S ALONG
COAST AND HIGH PRES RIDGE BUILDING SE WILL PRODUCE MINIMAL GALES
OVER THE N CA WATERS TODAY AND TONIGHT. ANOTHER BRIEF PERIOD IS
ALSO EXPECTED LATE MON AFTERNOON AND EVENING. THE 12Z SEA STATE
ANALYSIS INDICATED THAT OBSERVED SEAS WERE WITHIN A FT OF THE
MWW3/ECMWF WAM FCST VALUES.

-----------------------------------------------------------------
PREVIOUS DISCUSSION...

LATEST OBS SHOW SEAS TO 16 FT ACROSS WRN PTNS OF PZ5 WATERS AS A
S/WV DIGS S ALONG THE CST. ASCAT PASS FROM 06Z INDICATES 20-30 KT
ACROSS NUCH OF OFFSHORE WATERS N OF PT REYES WITH MAX WINDS TO 35
KT JUST W OF WA/OR WATERS. THE ASCAT PASS MATCHES UP WELL WITH
CURRENT 30M GFS FCST. GIVEN THE PRIMARY N-NW FLOW THOUGHOUT MUCH
OF THE PERIOD I WILL BE POP THE WIND GRIDS USING THE GFS 30M
WINDS...OCCASIONALLY BLENDING IN 25 PERCENT ECMWF IN ORDER TO
SHADE THE WIND SPEED A TAD LOWER IN SPOTS. FOR THE MOST PART THE
GLOBAL MODELS ARE IN VERY GOOD AGREEMENT THROUGHOUT THE TIME
PERIOD AS A STRONG RIDGE REMAINS ANCHORED W OF THE WATERS ALONG
140W WHILE S/WV ENERGY DIGS S ALONG THE PACIFIC CST. LATER IN THE
PERIOD EXPECT THE NRN PTN OF THE RIDGE TO BREAK DOWN A BIT AS A
SYSTEM APPROACHES FROM THE W ON DAYS 5 AND 6...PUSHING THE RIDGE
FURTHER E INTO THE PZ5 WATERS...CAUSING THE GRADIENT TO WEAKEN.

SEAS...WILL USE A 50/50 BLEND OF ENP AND ECMWF WAVE GUID WHEN POP
THE WAVE GUID.

.EXTRATROPICAL STORM SURGE...N/A


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE TODAY.
.PZZ915...OUTER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE TODAY.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE TODAY INTO TONIGHT.
.PZZ920...OUTER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE TODAY INTO TONIGHT.
.PZZ825...INNER WATERS FROM POINT ARENA TO PIGEON POINT...
     GALE POSSIBLE MON INTO MON NIGHT.
.PZZ925...OUTER WATERS FROM POINT ARENA TO PIGEON POINT...
     GALE POSSIBLE MON INTO MON NIGHT.
.PZZ830...INNER WATERS FROM PIGEON POINT TO POINT PIEDRAS BLANCAS...
     GALE POSSIBLE MON INTO MON NIGHT.
.PZZ930...OUTER WATERS FROM PIGEON POINT TO POINT PIEDRAS BLANCAS...
     GALE POSSIBLE MON INTO MON NIGHT.

$$

.FORECASTER KOSIER/SHAW. OCEAN PREDICTION CENTER.


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