280  
AGPN40 KWNM 212004  
MIMPAC  
 
MARINE WEATHER DISCUSSION FOR N PACIFIC OCEAN  
NWS OCEAN PREDICTION CENTER WASHINGTON DC  
104 PM PDT TUE AUG 21 2018  
   
FORECAST DISCUSSION
 
MAJOR FEATURES/WINDS/SEAS/SIGNIFICANT  
.WEATHER FOR THE NORTH PACIFIC N OF 30N AND E OF 150W.  
 
A HIGH PRESSURE RIDGE WEST OF THE OFFSHORE WATERS IS CURRENTLY  
COMBINING WITH A LOW PRESSURE TROF NEAR THE COAST TO PRODUCE  
NORTH TO NORTHWEST WINDS UP TO 20 KNOTS ACROSS PORTIONS OF THE  
PZ5 AND NORTHERN PZ6 WATERS. BY LATE WEDNESDAY NORTHWEST WINDS  
WILL INCREASE TO 30 KNOTS ACROSS THE NORTHEAST PORTION OF THE  
WASHINGTON OFFSHORE WATERS AS THE HIGH WEST OF THE PZ5 WATERS  
STRENGTHENS. WINDS WILL THEN REMAIN NEAR 30 KNOTS ACROSS THE  
NORTHEAST WASHINGTON WATERS INTO THURSDAY NIGHT. BY LATE FRIDAY  
THE STRONGEST WINDS WILL SHIFT SOUTH TO A POSITION OFF OF  
NORTHERN CALIFORNIA WITH WINDS UP TO 30 KNOTS. THESE CONDITIONS  
WILL THEN CONTINUE TO THE END OF THE FORECAST PERIOD. THE LATEST  
RUNS OF THE GFS AND ECMWF LOOK TO BE IN REASONABLE AGREEMENT  
ACROSS THE EASTERN PACIFIC THROUGH SUNDAY. FOR WIND GRIDS WILL  
USE THE GFS 10M WINDS THROUGHOUT. CURRENT FORECAST LOOKS  
REASONABLE AND WILL CONTINUE TO CARRY NO WARNINGS ACROSS THE  
OFFSHORE WATERS DURING THE FORECAST PERIOD.  
 
FOR WAVE HEIGHT GRIDS WILL ALSO CONTINUE TO USE THE NWW3  
THROUGHOUT THE FORECAST PERIOD.  
 
EXTRATROPICAL STORM SURGE GUIDANCE...N/A.  
 
   
WARNINGS
 
PRELIMINARY.  
   
PZ5 WASHINGTON/OREGON WATERS
 
 
NONE.  
   
PZ6 CALIFORNIA WATERS
 
 
NONE.  
 

 
 
.FORECASTER NOLT. OCEAN PREDICTION CENTER.  
 
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