

245 

AGPN40 KWNM 130902

MIMPAC



MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN

NWS OCEAN PREDICTION CENTER WASHINGTON DC

202 AM PDT SAT AUG 13 2016



.FORECAST DISCUSSION: MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT

.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.



THERE WAS AN ASCAT PASS AT 05Z WHICH COVERED MUCH OF THE OFFSHR

ESPECIALLY THE WA/OR WTRS WHERE MDL GUID HAS THE STGST WINDS. THE

STGST WINDS WERE TO 20 KT WHICH MATCHES WELL WITH A SHIP OBS OVR

THE NRN WA WTRS WITH 20 KT AND ALSO MATCHES WELL WITH BUOY DATA ON

THE ERN AND WRN AREAS OF THE SWATH. GFS 10M WINDS ARE IN CLOSE

AGRMT WITH THE SATEL DERIVED WINDS.



FOR TDA THE HIGH PRES RDG TO THE W AND SW OF THE NRN OFFSHR WTRS

WL BECOM SLGTLY WKR TDA INTO TNGT...THEN BECOM STGR AS A RDG

BUILDS BACK E OVR THE WTRS SUN THRU WED NGT. GFS HAS THE COASTAL

TROF SHUD REDEVLPG OVR THE NRN CA WTRS SUN EARLIER THAN THE

UKMET/ECMWF WHICH ARE IN CLOSER AGRMT BY LATER MON WITH

INTENSIFICATION OCCURRING THRU WED NGT. OVR THE OFFSHR WTRS XPCT

WINDS TO INCRS TO GALE FORCE BY MON AFTN OVR THE ERN AREAS OF THE

NRN CA OFFSHR WTRS. THE GFS BECOMS STGST WITH THE AREA OF HIGH

PRES TO THE W OF THE NRN WTRS BY WED AND NGT WITH OTHER MDL GUID

IN SMLR AGRMT. THE STGST WINDS DVLP BY TUE NGT AND CONT THRU WED

NGT WITH STGST WINDS OVR THE ERN AREAS OF THE NRN CA. IN ADDITION OVR

THE ERN AREAS OF THE NRN WA WTRS WINDS INCRS TO GALE FORCE AS THE

HIGH PRES STRENGTHENS AND COASTAL TROF INTENSIFIES. WL HAV WINDS

TO 35 KT DURING THE PK PDS.



SEAS...COMPARISON OF THE MULTIGRID WWIII AND ECMWF WAM THRU THE

FCST PD SHOWS CLOSE AGRMT THRU TUE NGT WITH THE WWIII FURTHER S

WITH MAX SEAS ALG THE CNTRL CA WTRS BY LATE WED AND WED NGT. PLAN

TO USE A 50/50 BLEND OF THE WWIII/ECMWF WAM THRU THE FCST PD WITH

MINOR MODIFICATIONS MAINLY TO THE LATER FCST PDS. 





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





.WARNINGS...PRELIMINARY.



.PZ5 WASHINGTON/OREGON WATERS...

.PZZ800...INNER WATERS FROM CAPE FLATTERY TO CAPE SHOALWATER...

     GALE POSSIBLE WED INTO WED NIGHT. 

.PZZ815...INNER WATERS FROM FLORENCE OR TO POINT ST. GEORGE...

     GALE POSSIBLE TUE NIGHT INTO WED NIGHT. 



.PZ6 CALIFORNIA WATERS...

.PZZ820...INNER WATERS FROM POINT ST. GEORGE TO POINT ARENA...

     GALE POSSIBLE MON NIGHT INTO WED NIGHT. 

.PZZ920...OUTER WATERS FROM POINT ST. GEORGE TO POINT ARENA...

     GALE POSSIBLE WED INTO WED NIGHT. 

.PZZ825...INNER WATERS FROM POINT ARENA TO PIGEON POINT...

     GALE POSSIBLE WED INTO WED NIGHT. 

.PZZ925...OUTER WATERS FROM POINT ARENA TO PIGEON POINT...

     GALE POSSIBLE WED NIGHT.



$$



.FORECASTER ROWLAND. OCEAN PREDICTION CENTER.

