061  
WHUS56 KSEW 301503 CCA  
SMWSEW  
PZZ153-173-301530-  
/O.COR.KSEW.MA.W.0001.180830T1503Z-180830T1530Z/  
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SPECIAL MARINE WARNING  
NATIONAL WEATHER SERVICE SEATTLE WA  
803 AM PDT THU AUG 30 2018  
 
THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A  
 
* SPECIAL MARINE WARNING FOR...  
COASTAL WATERS FROM JAMES ISLAND TO POINT GRENVILLE OUT 10 NM...  
WATERS FROM JAMES ISLAND TO POINT GRENVILLE 10 TO 60 NM...  
 
* UNTIL 830 AM PDT  
 
* AT 803 AM PDT, A STRONG THUNDERSTORM WAS LOCATED 36 NM SOUTHWEST OF  
JAMES ISLAND, MOVING NORTHEAST AT 50 KNOTS.  
 
HAZARD...WIND GUSTS 34 KNOTS OR GREATER.  
 
SOURCE...DOPPLER RADAR.  
 
IMPACT...SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS  
AND SUDDENLY HIGHER WAVES.  
 
* THE STRONG THUNDERSTORM WILL REMAIN OVER MAINLY OPEN WATERS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE  
EXPECTED.  
 
FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE  
OPEN WATER STAY BELOW DECK IF POSSIBLE, KEEP AWAY FROM UNGROUNDED  
METAL OBJECTS.  
 

 
 
LAT...LON 4733 12528 4749 12541 4781 12471 4758 12451  
TIME...MOT...LOC 1503Z 240DEG 49KT 4745 12526  
 
HAIL...0.00IN  
WIND...>34KTS  
 

 
 
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