Marine Interpretation Message
Issued by NWS

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000
AGPN40 KWNM 311428
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
728 AM PDT THU JUL 31 2014

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

A RIDGE OF HIGH PRES PERSISTS JUST W OF THE WTRS THIS AM WITH
A LOW PRES TROF EXTENDING FROM THE SW OREG COAST S AND SE ALONG
THE CALIF COAST. A WEAKENING STNRY FRONT EXTENDS FROM FAR WRN WASH
OFF WTRS OFF TO THE SW. LITTLE CHANGE IS FCST OVR THE REGION FOR
THE NEXT FEW DAYS. NO MAJOR CHANGES ARE REQUIRED FOR THE AM UPDATE
AS WELL. WE WILL ATTEMPT TO FIT CURRENT CONDITIONS TO THE ONGOING
FCST AND TWEAK GRIDS NR THE CWF AND TAFB FCSTS FOR THE AM UPDATE
BUT OTW LV PREV FCST PRETTY MUCH ALONE.

SEAS...SEA HTS RANGE FROM A MAX OF 8-9 FT OFF NOCAL TO 3 FT OVR
WASH OFF WTRS PER THE LATEST OBS AND ALTIMETER DATA OVR THE OFF
WTRS. OBS ARE GNRLY WITHIN A FT OR SO OF THE ONGOING OPC FCST.
LITTLE CHANGE WILL BE MADE TO THE FCST FOR THE AM UPDATE.

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

THERE WAS A WK FNTL BOUNDARY XTNDG E INTO THE WA WTRS WHICH SHUD
DSIPT LATER TDA. HIGH PRES WAS JUST N OF THE WA WTRS AND JUST S
OF THE FNTL BOUNDARY ANOTHER AREA OF HIGH PRES WAS NEAR THE OR/NRN
CA WTRS EARLY THIS MRNG. ELSW A COASTAL TROF ALG THE CNTRL AND
NRN AREAS OF CA MAINTAINS ITS INTENSITY THRU SUN AND SUN NGT...AND
APRS TO START TO WKN LATE MON INTO MON NGT. MDLS ARE IN GENERAL
AGRMT WITH THE INTENSITY OF TROF PEAKING LATE SUN INTO SUN NGT.
PLAN TO USE 30M GFS GUID THRU SUN NGT. MOST OF MDLS KP THE AREA
OF HIGH PRES ALG AND W OF THE WTRS THRU SUN NGT...BEFORE WKNG OVR
THE WA/OR WTRS LATE MON AND MON NGT WITH THE MOVMT OF A WK CD FNT
INTO THE WTRS. THE GFS CONTS TO BE SLOWER WITH THE FNT MOVG OVR
THE WTRS THAN ECMWF. THE GEM IS ALSO SLOWER WITH THE FNT AND CLOSE
TO THE GFS. THE UKMET KEEPS A STGR HIGH PRES OVR THE WA/OR WTRS AT
THAT TIME WITH STGR DVLPG LOW MOVG INTO THE GLF OF AK. WL CONT TO
FAVOR THE ECMWF FOR MON INTO MON NGT.

SEAS...WWIII WV AND 00Z ECMWF WV GUID ARE CLOSE TO OBS SEAS THIS
MRNG WITH MINOR DIFFS. BOTH THE WWIII/ECMWF ARE SMLR INTO EARLY
SUN WITH THE ECMWF HIER WITH SEAS BY LATE SUN INTO MON. WL BLEND
THE 50/50 THE MDLS THRU THE FCST PD.

.EXTRATROPICAL STORM SURGE GUIDANCE...NA

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER MILLS/ROWLAND. OCEAN PREDICTION CENTER.



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