424  
AGPN40 KWNM 240930  
MIMPAC  
 
MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN  
NWS OCEAN PREDICTION CENTER WASHINGTON DC  
230 AM PDT MON APR 24 2017  
   
FORECAST DISCUSSION
 
MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT  
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.  
 
THERE WAS AN ASCATB PASS AT AROUND 0445Z AND AN ASCAT PASS AT  
0530Z WITH MAX WINDS OVER THE SRN CA WATERS WITH WINDS TO 30 KT.  
ELSEWHERE WINDS WERE TO 25 KT OVER THE OR/NRN CA WATERS.  
 
AT 06Z SURFACE ANALYSIS MAINTAINS A HIGH PRESSURE AREA TO THE W  
OF THE CENTRAL AND SRN CA WATERS. LOW PRESSURE HAS MOVED E INTO  
THE WA/OR WATERS WITH A COLD FRONT TRAILING SW THROUGH THE OR/NRN  
CA WATERS. AS THE COLD FRONT MOVES S OVER THE CENTRAL CA WATERS  
AND DISSIPATES GALES SHOULD DEVELOP OVER THE INNER SRN CA WATERS  
BY EARLY TONIGHT. THE LOW PRESSURE MOVES E AND INLAND OVER THE OR  
COAST LATER THIS MORNING AND EARLY AFTERNOON. WINDS IN  
ASSOCIATION WITH THE LOW PRESSURE AND COLD FRONT SHOULD HAVE  
WINDS TO 30 KT THIS MORNING...AND DROP OFF AS THE LOW PRESSURE  
MOVES INLAND. FOR THE SRN AREAS OF CA WATERS GALES SHOULD BECOME  
PERSISTENT AND MORE WIDESPREAD LATER THIS WEEK AS AN UPPER  
SHORTWAVE MOVES S ALONG THE W COAST LATER ON THU AND DEVELOPS AND  
MOVES S NEAR THE SRN CA COAST FRI AND FRI NIGHT.  
 
FOR THE GRIDS WILL FAVOR THE GFS INITIALLY TODAY THROUGH EARLY  
WED, THEN WILL FAVOR THE UKMET/ECMWF WHICH ARE STRONGER WITH THE  
AREA OF HIGH PRESSURE THAT MOVES E AND APPROACHES THE NRN AND  
CENTRAL AREAS OF THE OFFSHORE WATERS THU INTO FRI.  
 
SEAS... AS WAS DONE PREVIOUS WILL CONTINUE TO USE A BLEND OF THE  
WWIII AND ECWMF WAM ALTHOUGH WITH A 40/60 BLEND THROUGH THE  
FORECAST PERIOD.  
   
EXTRATROPICAL STORM SURGE GUIDANCE
 
N/A.  
 
   
WARNINGS
 
PRELIMINARY.  
   
PZ5 WASHINGTON/OREGON WATERS
 
 
NONE.  
   
PZ6 CALIFORNIA WATERS
 
   
PZZ825...INNER WATERS FROM POINT ARENA TO PIGEON POINT
 
 
GALE POSSIBLE FRIDAY NIGHT.   
PZZ830...INNER WATERS FROM PIGEON POINT TO POINT PIEDRAS BLANCAS
 
 
GALE POSSIBLE FRIDAY INTO FRIDAY NIGHT.    
PZZ835
 
INNER WATERS FROM POINT PIEDRAS BLANCAS TO SANTA CRUZ ISLAND, CA...  
GALE POSSIBLE FRIDAY INTO FRIDAY NIGHT.    
PZZ840
 
INNER WATERS FROM SANTA CRUZ ISLAND, CA TO SAN CLEMENTE ISLAND, CA...  
GALE TONIGHT INTO TUESDAY NIGHT.  
GALE POSSIBLE WEDNESDAY INTO FRIDAY NIGHT.    
PZZ940...OUTER WATERS FROM SANTA CRUZ ISLAND, CA TO 120W
 
 
GALE POSSIBLE WEDNESDAY INTO FRIDAY.    
PZZ945...OUTER WATERS FROM 120W TO SAN CLEMENTE ISLAND, CA
 
 
GALE POSSIBLE WEDNESDAY NIGHT INTO FRIDAY.  
 

 
 
.FORECASTER ROWLAND. OCEAN PREDICTION CENTER.  
 
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