Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 260248
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
748 PM PDT MON JUL 25 2016

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

THE PREVIOUS FCST APPEARS ON TRACK THIS EVENING. WE STILL EXPECT
GALES TO SPREADING INTO THE INNER NRN CALIF OFF WTRS AROUND
MIDNITE...WITH GALES FCST TO CONTINUE OVR NE NRN CALIF AND SE
OREGON WTRS FOR MUCH OF THE WEEK. THE 18Z GFS MDL GUID IS VRY
SIMILAR TO THE 12Z CYCLE. THE 00Z OPC-NCEP SFC ANALYSIS INDICATED
A STRONG 1030 MB HIGH PRES NR 39N138W...WITH LOW PRES JUST INLAND
FROM THE COAST OVR NRN CALIF WITH AN ASSOC TROF EXTENDING S AND SE
OVR WRN CALIF. LITTLE CHANGE IS THIS WX PATTERN APPEAR LKLY OVR
THE NEXT SEVERAL DAYS. TROPICAL WEATHER SYSTEMS ARE REMAINING
WELL S AND SW OF THE OFF WTRS THIS EVE...AND ARE FCST TO REMAIN
WELL S OF THE WTRS OVR THE NEXT FEW DAYS. FOR ADTL INFORMATION
CONCERNING THESE SYSTEMS...T.S. FRANK AND HURCN GEORGETTE...PLS
REFER TO THE LATEST ADVISORIES ISSUED BY NHC.

SEAS...SEA HEIGHTS RANGE FROM NR 12 FT OVR NRN AND CENTRAL CAL
WTRS TO 4 TO 6 FT OVR FAR SE SRN CALIF AND NW WASH OFF WTRS. FOR
THE EVE UPDATE WE WILL MAKE MINOR ADJUSTMENTS TO THE FCST AND
GRIDS TO FIT CURRENT CONDITIONS AND TO FIT A LITTLE BETTER WITH
NEARBY COASTAL WTRS AND TAFB FCSTS. OTW...NO MAJOR CHANGES APPEAR
NEEDED FOR THE EVE UPDATE.

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

THE ASCAT PASS FROM 18Z AND THE RAPID SCAT PASS FROM 13Z THIS
MORNING BOTH INDICATE AN AREA OF 30 KT WINDS ALONG THE NRN CA
CST...EXTENDING INTO THE INNER OFFSHORE WATERS. THERE COULD BE
SOME DIURAL FLUCTUATIONS OCCURING AS AN EARLIER RAPID SCAT PASS
INDICATED GALES ACROSS THIS AREA. THE TROF ALONG THE CALIFORNIA
CST WILL SLOWLY STRENGTHEN OVR THE 24 HRS ALLOWING GALES TO
RETURN TONIGHT...FIRST IN THE COASTAL WATERS...THEN EXPANDING INTO
THE INNER OFFSHORE WATERS LATE TONIGHT. THE OVERALL PATTERN WILL
REMAIN VERY PERSISTANT DURING THE REMAINDER OF THE WEEK AS THE
GALES ALONG THE NRN CA PERSIST...EXTENDING ALONG THE FAR SW CST OF
OREGON FOR A PERIOD OF TIME. ALL OF THE 12Z GLOBAL MODELS ARE IN
GOOD AGREEEMENT THROUGHOUT THE PERIOD FOR MUCH OF THE WAATERS. THE
GFS INDICATES THAT GALES ARE ALSO POSSIBLE OVER THE FAR NERN PTN
OF INNER WASHINGTON WATERS SAT INTO SAT NIGHT. ATTM I AM KEEPING
GALES OUT OF THE REGION UNTIL I SEE MORE CONSISTANCY WITH THE
MODELS. THE ECMWF ISNT QUITE AS STRONG WITH THE GRADIENT AS THE
GFS IS ACROSS THE PORTION OF THE WATERS LATER IN THE WEEK. WILL
POP THE WIND GRIDS USING A 50/50 BLEND OF THE 30M AND 10M WINDS
THROUGHOUT THE FCST PERIOD...WITH SOME MINOR EDITS. WILL KEEP ALL
GALES OUT OF THE OUTER WATERS FOR THE TIME BEING.

SEAS...BOTH THE ENP AND WAM ARE IN GOOD AGREEMENT THROUGHOUT THE
PERIOD. WILL POP THE WAVE GRIDS USING THE ENP THROUGHOUT.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE TUE NIGHT INTO WED.
     GALE POSSIBLE THU NIGHT INTO SAT.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE TONIGHT INTO WED.
     GALE POSSIBLE WED NIGHT INTO SAT NIGHT.
.PZZ825...INNER WATERS FROM POINT ARENA TO PIGEON POINT...
     GALE TUE.

$$

.FORECASTER MILLS/SHAW. OCEAN PREDICTION CENTER.


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