944  
WHUS43 KGRR 241442  
CFWGRR  
 
COASTAL HAZARD MESSAGE  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
1042 AM EDT SAT JUN 24 2017  
 
MIZ056-064-071-242245-  
/O.CON.KGRR.BH.S.0006.000000T0000Z-170626T0000Z/  
OTTAWA-ALLEGAN-VAN BUREN-  
1042 AM EDT SAT JUN 24 2017  
 
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SUNDAY  
EVENING...  
 
* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING  
CONDITIONS EXPECTED.  
 
* STRONG STRUCTURAL CURRENTS EXPECTED.  
 
* STRONG LONGSHORE CURRENTS EXPECTED.  
 
* RIP CURRENTS EXPECTED.  
 
* LOCATION...BEACHES FROM ST. JOSEPH TO GRAND HAVEN.  
 
* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...  
 
NORTH BEACH IN SOUTH HAVEN... HOLLAND STATE PARK...  
 
* OVERVIEW/POTENTIAL IMPACTS...WESTERLY WINDS WILL INCREASE TO  
AROUND 20 MPH TODAY...WHICH WILL BUILD WAVES INTO THE 3 TO 5  
FOOT RANGE. CONDITIONS WILL REMAIN SIMILAR INTO SUNDAY...WITH  
POSSIBLY A BETTER CHANCE AT REACHING THE 3 TO 5 FOOT WAVE  
RANGE. DANGEROUS SWIMMING CONDITIONS DEVELOP WHEN WAVES REACH  
THIS HEIGHT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
HIGH WAVE ACTION MAKES SWIMMING DIFFICULT AND CAN TIRE EVEN A  
STRONG SWIMMER QUICKLY.  
 
STRUCTURAL CURRENTS FORM ALONG PIERS WHERE LONGSHORE CURRENTS AND  
WAVE ACTION FLOW INTO THE STRUCTURE. STRUCTURAL CURRENTS CAN  
SWEEP YOU OUT INTO DEEPER WATER ALONG THE PIER STRUCTURE.  
 
A LONGSHORE CURRENT IS A LAKE CURRENT THAT MOVES PARALLEL TO  
SHORE. LONGSHORE CURRENTS CAN BE STRONG ENOUGH TO PREVENT  
SWIMMERS FROM BEING ABLE TO KEEP THEIR FEET ON THE BOTTOM...  
MAKING IT DIFFICULT TO RETURN TO SHORE.  
 
RIP CURRENTS ARE POWERFUL CHANNELS OF WATER FLOWING QUICKLY AWAY  
FROM SHORE...WHICH OCCUR MOST OFTEN AT LOW SPOTS OR BREAKS IN  
SANDBARS. RIP CURRENTS CAN SWEEP YOU INTO DEEPER WATER.  
 

 
 

 
 
WEATHER.GOV/GRR  
 
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