Marine Interpretation Message
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AGPN40 KWNM 300351
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
851 PM PDT TUE JUL 29 2014

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


LATEST NCEP GUIDANCE HAS CHANGED LTL SINCE PREVIOUS RUNS AND
OVERALL ALONG WITH 12Z NON-NCEP MDLS REMAINS CONSISTENT. MDLS CONT
TO SHOW RELATIVELY WK GRADIENTS OVERNIGHT GIVING WAY TO INCRG
LATER WED INTO SUN AS UPR LOW ERN GLF OF AK SHFTS SW ALLOWING UPR
RDG OVER WRN STATES INTO SW CANADA TO BLD SLOLY N ALG WITH
INVERTED TROF. NOT MAKING CHANGES TO CURRENT WND GRIDS BASED ON
12Z GFS BUT ON DAY 5 USED 12Z ECMWF AS ECMWF/UKMET/GEM BRING MORE
OF A LOW INTO AREA NW OF PZ5 AREA LATER SUN AND WKNG RDG W OF NRN
WTRS MORE VERSUS GFS WHICH HAS STRONGER RDG W OF NRN WTRS. NO
HEADLINES NEEDED.

SEAS...ENP WW3 APPS TO HAVE GOOD INITIALIZATION AND USED 12Z RUN
EXCP ON SUN USED 12Z ECMWF WAM SINCE ASCD SFC FCST PREFERRED THEN.
-----------------------------------------------------------------
PREVIOUS DISCUSSION...

THE IR SAT IMG SHOW NO THICK CONV CLDS OVR THE REGION XCPT THE FAR
SRN PART THAT HAS CLDS THAT HAV XTNDD N ASSCTD WITH TS HERNAN. THE
RADAR SHOW NO TSTMS CELLS OVR THE REGION AND EVEN THE ADJC COASTAL
REGIONS. AT 1800Z HGH PRES 1026 MB W OF THE CNTRL REGION IS STILL
XTNDG RIDGES INTO THE NRN AND SRN WTRS. LOW PRES 1012 MB N OF THE
REGION HAS A FRNT STRCHNG SE THAT ENTERS WASH WTRS AND THEN CURVES
SW. INLAND LOW PRES 1014 MB OVR AZ HAS A TROF XTNDG NW ACRS CA. TS
HERNAN STILL S OF THE REGION MOVING IN THE GENERAL NW DIR AND MORE
INFO CAN BE FOUND AT THE NHC. THE PRES GRDNT IS VERY WEAK AND THE
MAX OBS WINDS ARE ONLY 15 KT. THE LATST ASCAT PASS AT 1742Z HAD NO
WINDS ABOVE 20 KT.

THE GLBL MDLS HV INITIALIZED WELL AND ONLY HV THE HGH PRES TO
AGREE ON. WILL STAY WITH GFS FOR THIS PCKGE. A RIDGE OF HGH PRES
NR THE REGION WILL KEEP ALL THE ENRGY TO THE GULF OF AK. IN THE
SHORT TERM HGH PRES WILL REMAIN ANCHORED TO THE W AND STILL
MAINTAIN A RIDGE ACRS THE REGION WITH A QUITE SLACK PRES GRDNT.
THE WINDS WILL REMAIN BELOW GALE FORCE IN THE FRCST REGIONS.

.SEAS...THE SEAS RANGE BTWN 4 AND 7 FT WITH HGHST SEAS OVR THE ERN
PARTS OF THE NRN CAL WTRS. THE NWW3 MULTI GRID FITS FAIRLY WELL
WITH THE OBS SEAS AND IT HAS BEEN QUITE CONSSTTNT.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

.PZ6 CALIFORNIA WATERS...
     NONE.

$$

.FORECASTER BANCROFT/MUSONDA. OCEAN PREDICTION CENTER.



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