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whus46 kmtr 191154
cfwmtr
003 

coastal hazard message
national weather service san francisco bay area
454 am pdt thu oct 19 2017

...high surf expected tonight through friday...

.a large northwest swell of 15 to 18 feet with periods of 18 to
20 seconds will arrive early this evening and spread through the 
coastal waters through friday. this swell will result in breaking 
waves of 13 to 18 feet, occasionally up to 25 feet at favored 
beaches. these conditions will pose a threat to beachgoers and 
mariners traversing harbor entrances late this week.

caz006-505-509-529-530-192200-
/o.con.kmtr.su.y.0007.171020t0100z-171021t0100z/
san francisco-
coastal north bay including point reyes national seashore-
san francisco peninsula coast-northern monterey bay-
southern monterey bay and big sur coast-
454 am pdt thu oct 19 2017

...high surf advisory remains in effect from 6 pm this evening to
6 pm pdt friday...

* waves and surf...breaking waves of 13 to 18 feet, occasionally 
  up to 25 feet along west and northwest facing beaches. 

* timing...beginning tonight through friday evening.

* impacts...large breaking waves along the coast will lead to 
  increased wave run-up on beaches with waves topping and 
  washing over large rocks and jetties. these large waves can be 
  erratic and unpredictable. use extra caution near the surf 
  zone as these large waves will be capable of sweeping people 
  into the frigid and turbulent ocean water. mariners traversing 
  the bar or harbor entrances are also urged to exercise extreme 
  caution...or stay in port until the threat subsides. 

precautionary/preparedness actions...

a high surf advisory means that high surf will affect beaches in
the advisory area...producing rip currents and localized beach
erosion.

&&

$$

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