Marine Interpretation Message
Issued by NWS

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AGPN40 KWNM 241406
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
706 AM PDT SUN MAY 24 2015

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

NO CHANGES TO THE FCST ANTICIPATED ATTM.

SEAS...LATEST ENP VERSION OF WWIII WITHIN A FT OR TWO OF CURRENT
OBS.

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

THE IR SAT IMG HAS INDCTD MOSTLY CLDY BUT NO LIGHTNG STRIKES
ASSCTD WITH IT. THE RADAR HAS NO TSTMS CELLS OVR THE REGION. AT
0600Z BROAD HGH PRES WITH CNTR 1030 MB 300 NM W OF THE OREG WTRS
WITH RIDGES XTNDG N INTO THE GULF OF AK AND S THEN CURVES SE TO
PASS JUST W OF THE SRN WTRS. A SERIES OF INLAND LOWS WITH TROFS
STRETCHING FRM CANADA THRU LOW 1010 MB OVR N-ERN WASH STATE THEN
INTO ANOTHER LOW OVR SRN IDHO AND INTO LOW 1006 MB OVR SRN NV.
UPSTREAM IS A FRNTL SYSM WITH LOW CNTR 1009 MB NR 32N151W THAT HAS
FRNT STRCHNG N INTO THE GULF OF AK JUST W OF THE RIDGE. THE PRES
GRDNT IS FARILY SLCK OVR THE REGION AND THE MAX OBSVD WINDS ARE 25
KT OVR THE ERN PARTS OF THE CNTRL REGION. ELSEWHERE WINDS RANGE
BTWN 10 AND 20 KT.

MOST OF THE ENRGY IS JUST E OF THE FCST WTRS. THERE IS MORE SIG
ENERGY UPSTREAM TO THE NE OF THE HAWAIIAN ISLANDS ASCCTD WITH THE
FRNTL SYSM ALNG 150W. MOST OF THESE ENERGY WILL NOT REACH THE WTRS
BECAUSE THE UPPRLVL HGH PRES RIDGE WILL WEAKEN IT. THE UPPRLRVL
RIDGE WILL DOMINATE THRU THE FCST PRD AND SO THE PRES GRDNT SHUD
REMAIN SLCK THRU THE FCST PRD WHILE THE INLAND TROF WILL REMAIN
WEAK MOST OF THE TIME.

THE GLBL MDLS HV INITIALIZED WELL AGAIN AND THEY ONLY HAVE THE HGH
PRES AND INLAND TROF TO AGREE ON. NO MJR DIFFS EXIST EVEN IN THE
XTNDD PRD AMONG MDLS AND SO WILL CONTINUE WITH GFS. IN THE SHORT
TERM HGH PRES WILL REMAIN ANCHORED TO THE W EVEN THOUGH THE CNTR
WILL SHIFT S AS IT WEAKENS...THE RIDGE WILL STILL BLOCK AND WEAKEN
THE FRNTL SYSTM AS IT PUSHES ITS WAY E. THE PRES GRDNT WILL REMAIN
SLACK GENERATING WINDS THAT WILL REMAIN BELOW GALE FORCE THRESHOLD
THRU THE FCST PRD.

.SEAS...SEAS RANGE BTWN 5 AND 7 FT OVER THE NRN WTRS AND BTWN 3
AND 6 FT ELSEWHERE. THE JASON PASS AT 1928Z HAD HGST 8 FT SEAS OVR
THE NRN WTRS.


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



.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER ACHORN/MUSONDA. OCEAN PREDICTION CENTER.


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