423  
FZHW52 PHFO 211306  
SRFHFO  
 
SURF ZONE FORECAST  
NATIONAL WEATHER SERVICE HONOLULU HI  
306 AM HST TUE NOV 21 2017  
 
HIZ005>011-220215-  
OAHU-  
306 AM HST TUE NOV 21 2017  
   
..HIGH SURF ADVISORY FOR NORTH FACING SHORES
 
 
SURF ALONG NORTH FACING SHORES WILL BE 12 TO 18 FEET TODAY, LOWERING  
TO 8 TO 12 FEET TONIGHT. SURF WILL THEN RISE RAPIDLY TO 20 TO 25 FEET  
WEDNESDAY AFTERNOON.  
 
SURF ALONG WEST FACING SHORES WILL BE 2 TO 4 FEET TODAY THROUGH  
WEDNESDAY.  
 
SURF ALONG EAST FACING SHORES WILL BE 4 TO 6 FEET TODAY, WITH LOCALLY  
HIGHER SETS ALONG SHORES EXPOSED TO THE NORTH SWELL. SURF WILL LOWER  
TO 3 TO 5 FEET TONIGHT, THEN RISE TO 4 TO 6 FEET ON WEDNESDAY, WITH  
LOCALLY HIGHER SETS ALONG SHORES EXPOSED TO THE NORTH SWELL.  
 
SURF ALONG SOUTH FACING SHORES WILL BE 2 TO 4 FEET TODAY THROUGH  
WEDNESDAY.  
 
OUTLOOK THROUGH TUESDAY NOVEMBER 28:  
THE CURRENT ADVISORY LEVEL NORTH SWELL WILL LINGER TODAY, THEN DECLINE  
TONIGHT. ANOTHER LARGE NORTH SWELL IS EXPECTED TO BUILD RAPIDLY ON  
WEDNESDAY AFTERNOON, PEAK WEDNESDAY NIGHT INTO THURSDAY, THEN SLOWLY  
DECLINE FRIDAY AND INTO THE WEEKEND. A HIGH SURF WARNING IS LIKELY  
WITH THIS SWELL FOR ALL ISLANDS WITH A NORTHERN EXPOSURE. ANOTHER  
LARGE NORTH SWELL IS FORECAST TO ARRIVE SUNDAY. LOCALLY GENERATED  
SWELL FROM THE STRONG GUSTY TRADE WINDS DURING THE SECOND HALF OF THE  
WORK WEEK MAY WARRANT A HIGH SURF ADVISORY FOR THE EAST FACING SHORES  
AS WELL. WATERS WILL BE DANGEROUSLY ROUGH AND CHOPPY ALONG WITH THE  
ELEVATED SURF. A SERIES OF SMALL BUT LONG PERIOD SOUTH SWELLS WILL  
PREVENT SURF FROM GOING FLAT ALONG THE SOUTH FACING SHORES THIS WEEK.  
 
SURF HEIGHTS ARE FORECAST HEIGHTS OF THE FACE, OR FRONT, OF WAVES. THE  
SURF FORECAST IS BASED ON THE SIGNIFICANT WAVE HEIGHT, THE AVERAGE  
HEIGHT OF THE ONE THIRD LARGEST WAVES, AT THE LOCATIONS OF THE LARGEST  
BREAKERS. SOME WAVES MAY BE MORE THAN TWICE AS HIGH AS THE  
SIGNIFICANT WAVE HEIGHT. EXPECT TO ENCOUNTER RIP CURRENTS IN OR NEAR  
ANY SURF ZONE.  
 

 
 
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