Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 031420
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
720 AM PDT MON AUG 3 2015

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

A HIGH PRES RIDGE W OF THE PZ6 WATERS CONTINUES TO COMBINE WITH
INLAND LOW PRES OVER THE SW U.S. TO PRODUCE NW WINDS UP TO 25 KT
OFF THE COAST OF SRN CALIFORNIA. CONDITIONS OFF OF SRN CALIFORNIA
WILL SLOWLY DIMINISH THROUGH TUE AND THEN THE STRONGEST CONDITIONS
WILL SHIFT N TO THE AREA W OF CAPE MENDOCINO BY WED. STILL EXPECT
MINIMAL GALES TO DEVELOP OFF OF SRN OREGON/NRN CALIFORNIA BY LATE
THU AND THU NIGHT. CONDITIONS WILL THEN DIMINISH BY SAT. CURRENT
WARNINGS LOOK REASONABLE AND FEW CHANGES SHOULD BE NEEDED ON THE
NEXT OFFSHORE FORECAST.

THE ENP VERSION OF THE NWW3 LOOKS REASONABLE WITH THE SEAS AND
WILL CONTINUE TO BE FOLLOWED FAIRLY CLOSELY DURING THE FORECAST
PERIOD.

EXTRATROPICAL STORM SURGE GUIDANCE...N/A.

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

THE SAT IMG HAS MOSLTY CLDY OVR THE NRN HALF OF THE REGION WITH
CLR TO THIN CLDS OVR THE REST OF THE REGION. THERE ARE LIGHTNG
STRIKES JUTS W OF THE NRN CA WTRS AND INLAND NR THE ORE COAST. THE
RADAR HAS NO TSTMS CELLS OVR THE REGION. AT 06Z HGH PRES 1026 MB
TO THE W HAS ITS RIDGE INTO THE NRN WTRS. LOW PRES 1014 MB OVR NRN
CA WTRS HAS TROF XTNDG SW. INLAND LOW PRES 1008 MB OVR NRN CA
STATE HAS ITS TROF STRCTHNG SE INTO AZ. THE PRES GRDNT IS FAIRLY
WEAK AND THE MAX OBSVD WINDS ARE GENERALLY 20 KT. THE LATST R-SCAT
PASS AT 0605Z HAD NO WINDS ABOVE 20 KT ACRS THE REGION.

MOST OF THE ENRGY WILL PASS JUST N OF THE REGION BUT THERE IS
SOME LOCALLY INDC ENERGY EMBDD IN AN UPPRLVL TROF JUST W OF THE
REGION THAT HAS BEEN BLOCKED FROM REACHING THE WTRS BY AN UPPRLVL
RIDGE THAT LIES ACRS THE REGION. THE UPPRLVL RIDGE WILL SHIFT
INLAND AND THAT WIL ALLOW SOME OF THE ENRGY TO REACH THE REGION
WITH THE MOST IMPACT TO BE FELT NR THE CNTRL WTRS AS INLAND TROF
WILL STRENGTHEN. WINDS WILL BE ELEVATED TO GALE FORCE TWD THE END
OF FCST PRD OVR THE ERN PARTS OF THE CNTRL WTRS.

MDLS HV INITIALIZED WELL AND ARE IN GUD AGRMNT ON THE FEW SYNOP
FEATURES IMPACTING THE WX OVR THE REGION. WILL STAY WITH GFS. IN
THE SHORT TERM HGH PRES WILL REMAIN TO THE W AND THE LOW PRES OVR
NRN CA WTRS WILL DSIPT. HGH PRES RIDGE WILL CVR MOST OF THE
REGION. THE INLAND TROF WILL STENGTHEN TOWD THE END OF PRD AND
ALLOW WINDS TO INCREASE. SO WILL RETAIN THE WRNGS IN THE XTND PRD
OVR THE CNTRL WTRS.

.SEAS...THE SEAS RANGE BTWN 3 AND 6 FT ACRS THE WTRS. THE NWW3
MULTI GRID FITS WELL WITH THE OBSVD SEAS PATTERN AND IS ALSO IN
AGRMNT WITH THE ECMWFWV AND HAS BEEN ON PAR WITH THE FCST. SO WILL
STAY CLOSE TO ITS SOLN.

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



.WARNINGS...PRELIMINARY.

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

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE POSSIBLE THU INTO THU NIGHT.

$$

.FORECASTER NOLT/MUSONDA. OCEAN PREDICTION CENTER.



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