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 041454
MIMPAC

MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN
NWS OCEAN PREDICTION CENTER WASHINGTON DC
754 AM PDT WED MAY 4 2016

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

AT 12Z A HIGH PRES RIDGE WAS ACROSS THE WA/OR WATERS W/A WEAK HIGH
PRES RIDGE OVER THE CA OFFSHORE WATERS. WILL NOT MAKE SIGNIFICANT
CHANGES IN THIS INTERMEDIATE UPDATE NOR CHANGES TO WARNING
HEADLINES IN PLACE.

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

A STNRY FNT WAS OVR THE CNTRL CA WTRS WHILE LOW PRES WAS SITU TO
THE W OF THE SRN CA WTRS EARLY THIS MRNG. BUOY OBS SHOWED WINDS
WERE TO 25 KT OVR THE NRN CA WTRS WITH MDL GUID SHOWING WINDS TO
30 KT NR THE ERN AREAS OF THE NRN CA/OR WTRS THIS MRNG. THERE WAS
A HIGH RESOL ASCAT PASS ALG THE THE ERN AREAS OF NRN CA WHICH
SHOWED MAX WINDS WERE TO 30 KT AT 0430Z. THERE WAS ANOTHER PASS AT
AT 0618Z ALG OR JUST W OF THE OFFSHR WTRS WHICH SHOWED LOW PRES NR
32N/129W WITH WINDS TO 30 KT OVR THE W AND NW QUADS. MDL GUID
TRACKS THE LOW PRES NR THE WRN AREAS OF THE SRN CA WTRS LATER TDA
AND TNGT WITH STGST WINDS TO 30 KT OVR THE W AND NW QUADS OF LOW.
ELSW OVR THE ERN AREAS OF THE NRN CA/OR WTRS WHERE STGST PRES GRAD
MDLS STILL SHOWG ABT 30 KT. LATER TNGT AS THE HIGH PRES W OF THE
WTRS MOVS SLOWLY EWD SHUD SEE GALE FORCE WINDS DVLPG. PLAN TO
FAVOR THE GFS THRU THE FCST PD AND WL BLEND WITH THE UKMET/ECMWF
WHICH ARE SOMEWHAT STGR WITH THE PRES GRAD AS GALES DVLP. GALES
STILL LOOK LIKELY TO CONT INTO LATE FRI OVR THIS AREA. THE PRES
GRAD BECOMS WKR FRI NGT INTO SAT AS HIGH PRES W OF THE WTRS BECOMS
WKR.

.SEAS...WL USE BLEND OF ABT 50/50 OF THE WWIII AND ECMWF WAM THRU
THE FCST PD. THE ECMWF WAM CONTS TO BE HIGHER WITH SEAS TO 15 FT
OR SO BY LATE TNGT...ALTHO THE GUID DOES NOT MAINTAIN THE HIGHER
SEAS AS LONG AS HAS BEEN THE CASE OVR THE PAST SVRL NGTS.

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


.WARNINGS...PRELIMINARY.

.PZ5 WASHINGTON/OREGON WATERS...
     NONE.

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

$$

.FORECASTER HOLLEY/ROWLAND. 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.