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whus46 kmtr 160446
cfwmtr
476 

coastal hazard message
national weather service san francisco ca
846 pm pst fri jan 15 2021

...moderate, long period northwest swell resulting in hazardous
conditions from coastal sonoma county to coastal monterey
county...

.a moderate, long period northwest swell will result in hazardous
conditions in the surf zone. initial forerunners of 3 to 6 feet
at 20 to 22 seconds will result in an increased risk of dangerous
sneaker waves and rip currents today. as the northwest swell
builds through tonight and into saturday, breaking waves of 15 to
17 feet (locally up to 20 feet at favored breakpoints) can be
expected along west to northwest facing beaches. as a result, a
high surf advisory is in effect from late this morning through
saturday evening for west and northwest facing beaches while a
beach hazard statement has been issued for the northern monterey
bay including santa cruz. a second, larger long period west to
northwest swell will arrive sunday and monday. continued
vigilance is advised.

caz006-505-509-530-161400-
/o.con.kmtr.su.y.0005.000000t0000z-210117t0300z/
san francisco-
coastal north bay including point reyes national seashore-
san francisco peninsula coast-
southern monterey bay and big sur coast-
846 pm pst fri jan 15 2021

...high surf advisory remains in effect until 7 pm pst saturday...

* what...initial forerunners of 3 to 6 feet at 20 to 22 seconds
  will result in an increased risk of dangerous sneaker waves and
  rip currents today. as the northwest swell builds through 
  tonight and into saturday, breaking waves of 15 to 17 feet 
  (locally up to 20 feet at favored breakpoints) can be expected 
  along west to northwest facing beaches.

* where...coastal north bay including point reyes national 
  seashore, southern monterey bay and big sur coast, san 
  francisco peninsula coast and san francisco.

* when...until 7 pm pst saturday.

* impacts...dangerous swimming and surfing conditions and
  localized beach erosion. expect localized beach erosion. people
  are strongly urged to remain well back from the ocean as these
  types of events often result in an increase in cold water
  rescues and the loss of life.

* additional details...while these waves are not as large as our
  previous events in the most recent days, unseasonable warm
  temperatures this holiday weekend will likely attract more
  people to the coast. individuals should be reminded that our
  coastline and the cold pacific waters remain dangerous as these
  larger than normal waves impact the coast. extreme caution is
  advised when visiting area beaches.

precautionary/preparedness actions...

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. use extra caution near the surf zone as these large
waves will be capable of sweeping people into the frigid and
turbulent ocean water. cold water shock may cause cardiac arrest,
and it also can cause an involuntary gasp reflex causing drowning,
even for a good swimmer. the surf zone will be dangerous due to
strong currents and powerful breaking waves. 

&&

$$
whus46 kmtr 160446
cfwmtr

caz529-161400-
/o.con.kmtr.bh.s.0001.000000t0000z-210117t0300z/
northern monterey bay-
846 pm pst fri jan 15 2021

...beach hazards statement remains in effect through saturday
evening...

* what....initial forerunners of 3 to 6 feet at 20 to 22 seconds 
  will result in an increased risk of dangerous sneaker waves and 
  rip currents today. as the northwest swell builds through 
  tonight and into saturday, larger breaking waves will be 
  possible, especially along any west to northwest facing beaches.
  
* where...northern monterey bay.

* when...through saturday evening.

* impacts...dangerous swimming and surfing conditions with 
  strong rip currents and sneaker waves. people are strongly 
  urged to remain well back from the ocean as these types of 
  events often result in an increase in cold water rescues and 
  the loss of life.

* additional details...while these waves are not as large as our
  previous events in the most recent days, unseasonable warm
  temperatures this holiday weekend will likely attract more
  people to the coast. individuals should be reminded that our
  coastline and the cold pacific waters remain dangerous as these
  larger than normal waves impact the coast. extreme caution is
  advised when visiting area beaches.

precautionary/preparedness actions...

a beach hazard statement for sneaker waves means that conditions
are present to support a heightened risk of unsuspecting beach
goers being swept into the sea by a wave. people walking along the
beach should never turn their back to the sea. 

remain out of the water to avoid hazardous swimming conditions. rock 
jetties can be deadly in such conditions, stay off the rocks.

&&

$$

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