Marine Interpretation Message
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
AGPN40 KWNM 291011
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
311 AM PDT WED JUL 29 2015

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

06Z NCEP FINAL SFC ANALYSIS SHOWS A LOW PRES TROUGH FM INLAND CA
TO PT ST GEORGE AND THEN ALG OREGON CST TO INLAND WA STATE WITH A
HIGH PRES RIDGE 135-140W W OF CA AND EXTENDING OVR NW PZ5 WTRS.
OVER THE REST OF THE PZ5/PZ6 WATERS. AVAILABLE ASCT-A DATA SHOWED
THE BEST CVRG WITH 25 KT FM N OREGON CST SW ACRS OUTER CENTRAL AND
N CA WTRS BUT MISSING CENTRAL CA WTRS AND INNER NRN CA AND SE
OREGON WTRS WHERE STRONGEST WINDS ARE SUSPECTED. WNDS APPR LIGHT
IN SRN CA AREA OF COVERAGE...AND ALSO NW PZ5 AREA. THE 00Z GFS 30M
WNDS APPR REPRESENTATIVE.

DID NOT MAKE MANY CHANGES TO ONGOING FORECAST WHICH WILL START
WITH MRGL GALES IN PORTIONS OF INNER ZONES CENTERED ON PT ST
GEORGE EARLY THIS MORNING AS LOW PRES TROF CA AND SRN OREGON CST
INTERACTS WITH RDG TO W AND NW. WILL CONT WITH MDL TRENDS TWD
DCRG WNDS AS THE TROUGH EXPANDS W WHILE ALSO WEAKENING...AND THE
HIGH PRES RDG TO NW WKNS SLOLY BUT OTRW REMAINS IN PLACE. THRU SUN
NIGHT. FCST BCMS MORE UNCERTAIN FOR SUN AND SUN NIGHT AS 00Z GFS
CNANGED FM A RDG NW OF PZ5 WTRS TO MOVG A LOW TO NR QUEEN
CHARLOTTES LINE OLD ECMWF...WITH NEW ECMWF DROPPIN G THE LOW AND
INSTEAD MOVG A WEAKER LOW N OF PZ5 AREA ON DAY 4. FAVORED THE 00Z
GFS FOR THE NEW FCST WITH 30M WNDS USED THRU TODAY THEN USED A
50/`50 BLEND OF GFS 30M AND 10M WNDS TONIGHT AND THU AND THEN GFS
10M WNDS THRU SAT NIGHT. FOR SUN AND SUN NIGHT USED 50/50 BLEND OF
00Z ECMWF/UKMET SUPPORTED BY 00Z GLOBAL GEM AND WPC PRELIM DAY 4/5
GUIDANCE AS COMPROMISE BETWEEN DIFFERENCES IN STRENGTH OF RDG
BETWEEN UKMET WHICH IS LIKE OLD GFS AND WEAKER ECMWF. WNDS ARE
EXPECTED GENLY 20 KT OR LESS CENTRAL AND S CA WTRS WED NIGHT AND
BEYOND AS A WK CUTOFF SYSTEM DVLPS W OF CA MAINTAINING A BROAD SFC
TROF AND WK GRADIENTS THERE.

.SEAS...USED 00Z ECMWF WAM FOR NEAR TERM THRU 00Z THU THEN FAVORED
A BLEND OF WAVE MDLS THRU RMNDR OF FCST WEIGHTED TWO THIRDS IN
FAVOR OF ECMWF.

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

.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...
     GALE EARLY TODAY.

.PZ6 CALIFORNIA WATERS...
.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...
     GALE EARLY TODAY.

$$

.FORECASTER BANCROFT. OCEAN PREDICTION CENTER.


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.