421  
WHUS56 KMTR 171816  
SMWMTR  
PZZ560-575-171845-  
/O.NEW.KMTR.MA.W.0003.180317T1816Z-180317T1845Z/  
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SPECIAL MARINE WARNING  
NATIONAL WEATHER SERVICE SAN FRANCISCO CA  
1116 AM PDT SAT MAR 17 2018  
 
THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED  
A  
 
* SPECIAL MARINE WARNING FOR...  
COASTAL WATERS FROM PIGEON POINT TO POINT PINOS CALIFORNIA OUT TO  
10 NM...  
WATERS FROM PIGEON POINT TO POINT PINOS 10-60 NM...  
 
* UNTIL 1145 AM PDT  
 
* AT 1114 AM PDT, A SEVERE THUNDERSTORM CAPABLE OF PRODUCING  
WATERSPOUTS WAS LOCATED ABOUT 15 MILES SOUTHWEST OF PIGEON POINT,  
MOVING SOUTHEAST AT 10 KNOTS.  
 
HAZARD...WATERSPOUTS, WIND GUSTS 34 KNOTS OR GREATER, AND SMALL  
HAIL.  
 
SOURCE...RADAR INDICATED.  
 
IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY  
HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY  
HIGHER WINDS AND SUDDENLY HIGHER WAVES.  
 
* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY OPEN WATERS.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
THUNDERSTORMS CAN PRODUCE SUDDEN WATERSPOUTS. WATERSPOUTS CAN EASILY  
OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR  
IMMEDIATELY.  
 

 
 
LAT...LON 3708 12264 3711 12256 3699 12246 3695 12258  
TIME...MOT...LOC 1814Z 329DEG 9KT 3704 12257  
 
WATERSPOUT...POSSIBLE  
HAIL...<.75IN  
WIND...>34KTS  
 

 
 
AS/MM  
 
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