589  
FZMY50 PGUM 161823  
SRFMY  
 
SURF ZONE FORECAST FOR THE MARIANA ISLANDS  
NATIONAL WEATHER SERVICE TIYAN GU  
423 AM CHST THU JAN 17 2019  
   
SYNOPSIS
 
LARGE NORTH AND EAST SWELLS WILL MAINTAIN A HIGH  
RISK OF RIP CURRENTS ALONG NORTH AND EAST FACING REEFS THROUGH  
AT LEAST FRIDAY MORNING. ADDITIONALLY, THERE IS A HIGH SURF  
ADVISORY ALONG NORTH FACING REEFS THROUGH THURSDAY NIGHT.  
HAZARDOUS SURF IS EXPECTED.  
 

 
 
GUZ001>004-171100-  
GUAM-ROTA-TINIAN-SAIPAN-  
423 AM CHST THU JAN 17 2019  
 
...HIGH SURF ADVISORY IN EFFECT THROUGH THURSDAY NIGHT ALONG  
NORTH FACING REEFS...  
...HIGH RISK OF RIP CURRENTS THROUGH LATE SATURDAY NIGHT  
ALONG NORTH AND EAST FACING REEFS...  
   
TODAY AND TONIGHT
 
 
COASTAL WINDS............BREEZY. EAST AT 15 TO 25 MPH.  
SURF ALONG NORTH FACING REEFS............9 TO 11 FEET.  
SURF ALONG EAST FACING REEFS............9 TO 11 FEET.  
SURF ALONG SOUTH FACING REEFS............2 TO 4 FEET.  
SURF ALONG WEST FACING REEFS............4 TO 6 FEET.  
PRIMARY SWELL...............NORTH AT 6 TO 8 FEET.  
PRIMARY PERIOD..............15 SECONDS.  
SECONDARY SWELL.............EAST AT 6 FEET.  
SECONDARY PERIOD............10 SECONDS.  
 
RIP CURRENT RISK.....HIGH. POUNDING SURF WILL PRODUCE LIFE  
THREATENING RIP CURRENTS AT REEFS AND BEACHES.  
 
SEA SURFACE TEMPERATURE AT RITIDIAN BUOY...82 DEGREES.  
MAXIMUM AFTERNOON HEAT INDEX...........AROUND 96.  
   
OUTLOOK
 
SURF ALONG NORTH AND EAST FACING REEFS MAY DECREASE  
ABOUT A FOOT ON FRIDAY.  
 
TIDE INFORMATION FOR THE NEXT 24 HOURS...  
 
AT APRA HARBOR, GUAM...  
HIGH TIDE 1.9 FEET AT 5:02 AM THURSDAY  
LOW TIDE 1.4 FEET AT 9:45 AM THURSDAY  
HIGH TIDE 2.4 FEET AT 3:36 PM THURSDAY  
LOW TIDE -0.2 FEET AT 11:00 PM THURSDAY  
 
AT ROTA ISLAND...  
HIGH TIDE 1.8 FEET AT 4:59 AM THURSDAY  
LOW TIDE 1.3 FEET AT 9:39 AM THURSDAY  
HIGH TIDE 2.2 FEET AT 3:33 PM THURSDAY  
LOW TIDE -0.2 FEET AT 10:54 PM THURSDAY  
 
AT TINIAN ISLAND...  
HIGH TIDE 1.4 FEET AT 5:00 AM THURSDAY  
LOW TIDE 0.4 FEET AT 9:22 AM THURSDAY  
HIGH TIDE 1.8 FEET AT 3:34 PM THURSDAY  
LOW TIDE -0.1 FEET AT 10:37 PM THURSDAY  
 
AT TANAPAG HARBOR, SAIPAN...  
HIGH TIDE 1.7 FEET AT 5:35 AM THURSDAY  
LOW TIDE 1.3 FEET AT 9:58 AM THURSDAY  
HIGH TIDE 2.1 FEET AT 3:38 PM THURSDAY  
LOW TIDE -0.1 FEET AT 11:07 PM THURSDAY  
 

 
 
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