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000
AGPN40 KWNM 222131
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
231 PM PDT WED MAY 22 2013

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

AT 22/1800Z LOW PRES 1010 MB 90 NM N OF THE REGION WITH GALE FORCE
WINDS HAS A TROF THAT XTNDS NW ALONG THE CANADA COAST WHILE
ANOTHER TROF STRETCHES SE THEN CURVES SW INTO THE NRN WTRS. INLAND
LOW PRES 998 MB OVR AZ/NV XTNDS A TROF ACRS CA STATE. HGH PRES
1036 MB CNTRED 500 NM DUE W OF THE OREG/CAL WTRS XTNDS A RIDGE
INTO THE GULF OF AK AND HAS ANOTHER RIDGE INTO THE CNTRL AND SRN
WTRS. A TIGHT PRES GRDNT EXITS BTWN THE HGH AND THE TROF ALONG CA.
GALE FORCE WINDS ARE CONFINED TO THE ERN EDGE OF THE SRN WTRS NR
THE INLAND TROF. THE LATST ASCT PASS AT 1700Z ONLY COVERED THE FAR
SRN PARTS OF THE REGION. THE PREVIOUS PASS AT 06Z HAD GALE FORCE
WINDS NW OF THE NRN WTRS. THE GLBL MDLS ARE IN GUD AGRMNT. THE HGH
PRES TO THE W OF THE REGION WILL KEEP MOVING S AS IT WEAKENS. THE
INLAND LOW PRES TROF WILL PERSIST ACRS CA BUT THE PRES GRDNT WILL
SLACKEN AS THE HGH MOVES S. GALE FORCE WINDS WIL BE CONFINED TO
THE ERN EDGE OF THE CNTRL WTRS THRU THU THEN WILL DIMINISH TO
BELOW GALE FORCE THRU MOST OF THE PREIOD. THE HGH PRES WILL
STRENGTHEN HWN IT GETS S AND BECOME NRLY STNRY JUST BEFORE END OF
FCST PRD. THE OINLAND LOW PRES TROF WILL DEEPEN AND THAT MAY FORCE
A TIGHT PRES GRDNT OVR THE SRN WTRS TO HVE WINDS ELEVATED TO GALE
FORCE. WILL STAY WITH GFS FOR THIS PCKGE.

SEAS...THE HGST SEAS ARE OVR THE NRN WTRS PEAKING AT 19 FT WITH
ANOTHER PEAK OF 17 FT OVR THE ERN EDGE OF THE CNTRL WTRS. THE NWW3
MULTI GRID FITS WELL WITH THE CURR SEAS PATTERN AND SEEM QUITE
REASONABLE WITH THE FCST.

EXTRATROPICAL STORM SURGE GUIDANCE...N/A.

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

.PZ5 WASHINGTON/OREGON WATERS...
.CAPE FLATTERY TO CAPE LOOKOUT...NONE.
.CAPE LOOKOUT TO PT ST GEORGE...NONE.

.PZ6 CALIFORNIA WATERS...
.PT ST GEORGE TO PT ARENA...NONE.
.PT ARENA TO PT CONCEPTION...GALE TONIGHT INTO THU...HI CONDNC.
.PT CONCEPTION TO GUADALUPE ISLAND...GALE TONIGHT INTO THU..HI
CONDNC. GALE SUN...LOW CONFDC.

$$

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.