Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 292035
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
135 PM PDT FRI JUL 29 2016

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

THE SAT IMG INDC FAIRLY CLOUDY SKIES ACROSS THE REGION BUT ALMOST
NO REPORTS OF LIGHTNING STRIKES. ALL THE OBSERVATIONS INDC HIGHER
WINDS OVER THE NRN CAL AND SRN OREG WATERS. AT 18Z INLAND TROF
EXTENDS NW FROM LOW PRES OVER SRN CAL INTO THE SRN OREG. HIGH PRES
1034 MB W OF THE WATERS NR 42N145W HAS ITS RIDGE OVER MOST OF THE
REGION. THE PRES GRADIENT IS TIGHT OVER THE NRN CAL AND SRN OREG
WATERS BUT QUITE SLACK ELSEWHERE.

MOST OF THE ENERGY IS JUST E OF AN UPPERLEVEL HIGH PRES CENTERED
NR 40N140W. THERE IS ANOTHER UPPERLEVEL HIGH PRES INLAND OVER THE
S-WRN STATES. THE TWO AREAS OF HIGH PRES HAVE CAUSED A SLOW DOWN
ON THE MOVEMENT OF OTHER SYNOP FEATURES. MOST OF THE ENERGY WILL
CONTINUE TO LINGER AROUND THE CNTRAL WATERS AND THAT WILL MAINTAIN
THE CURRENT SYNOPTIC FEATURES PATTERN. AS THE ENERGY SLOWLY SHIFTS
E OF THE WATERS IN THE EXTENDED PERIOD...AN UPPERLEVEL HIGH WILL
MOVE E INTO THE WATERS AND THAT WILL FORCE A RELAXED PRES GRADIENT
AND ALLOW WINDS TO DIMINISH BELOW GALE WARNING THRESHOLD.

THE GLOBAL MODELS HAVE INITIALIZED VERY WELL AND THEY ARE IN
GENERALLY A GOOD AGREEMENT ON THE FEW SYNOP FEATURES THAT ARE
CONTROLLING THE WX OVER THE REGION. WILL UPDATE THE FORECAST
WITHOUT MAJOR CHNAGES TO THE PREVIOUS FORECAST AND WILL STAY WITH
JUST GFS. IN THE SHORT TERM HGH PRES WILL REMAIN TO THE W AS
INLAND TROF PERSITS OVER CAL. THE WINDS WILL REMAIN ELEVATED IN
THE SHORT TERM BUT WILL DIMINISH TO BELOW GALE FORCE IN THE
EXTENDED PERIOD.

.SEAS...THE SEAS PEAK AT 12 FT OVER THE CENTRAL REGION AND THEY
RANGE BETWEEN 4 AND 7 OVER THE FAR SRN AND NRN WATERS. THE JASON
SWATHS AT 1712Z AND 1915Z MISSED THE CENTRAL WATERS BUT INDC SEAS
TO 5 FT OVER THE FAR NRN AND FAR SRN WATERS. THE NWW3 MULTI GRID
WAVE MODEL FITS FAIRLY WELL WITH THE OBSERVED SEAS PATTERN AND HAS
BEEN VERY CONSSISTENT. WILL STAY WITH ENP. IN THE SHORT TERM THE
SEAS WILL REMAIN LARGE OVER THE CENTRAL WATERS WITH PEAKS TO 15 FT
WHILE SEAS WILL JUST SUBSIDE IN THE EXTENDED PERIOD TO PEAKS AT 13
FT.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE TONIGHT INTO SAT NIGHT.
.PZZ900...OUTER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...
     GALE TONIGHT.
.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE TONIGHT INTO SUN.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE TODAY INTO SUN.
     GALE POSSIBLE SUN NIGHT.
     GALE POSSIBLE TUE NIGHT INTO WED NIGHT.
.PZZ920...OUTER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE SAT.

$$

.FORECASTER MUSONDA. OCEAN PREDICTION CENTER.



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