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>Coastal/Lakeshore Hazard Messages

whus46 keka 310904

coastal hazard message
national weather service eureka ca
204 am pdt sat oct 31 2020

coastal del norte-northern humboldt coast-southwestern humboldt-
mendocino coast-
204 am pdt sat oct 31 2020

...beach hazards statement in effect from sunday afternoon
through monday afternoon...

* what...a large northwesterly swell is expected sunday afternoon
  through monday afternoon resulting in an increased threat for
  sneaker waves along area beaches.

* where...coastal del norte, northern humboldt coast, 
  southwestern humboldt and mendocino coast counties.

* when...from sunday afternoon through monday afternoon.. .

* impacts...sudden larger waves occurring after periods of smaller
  waves may sweep beach goers into the ocean.

precautionary/preparedness actions...

remain out of the water to avoid hazardous swimming conditions.


whus46 kmtr 311832

coastal hazard message
national weather service san francisco ca
1132 am pdt sat oct 31 2020

...sneaker waves and rip currents for northwest facing beaches
from coastal sonoma county to coastal monterey county...

.a large long period northwest swell will arrive sunday afternoon
and impact the coastline through monday afternoon before
subsiding. initial swell heights of 1 to 2 feet at 23 seconds is
expected increasing the risk of sneaker waves. by sunday evening
into monday morning, wave heights of 6 to 9 feet at periods of
18 to 20 seconds are expected, with most favored northwest facing
beaches at 10 to 12 feet.

san francisco-
coastal north bay including point reyes national seashore-
san francisco peninsula coast-
southern monterey bay and big sur coast-
1132 am pdt sat oct 31 2020

...beach hazards statement remains in effect from sunday
afternoon through monday afternoon...

* hazards...breaking waves from 6 to 9 feet with 18 to 20 second 
  periods, with beaches in most favored locations seeing breaks 
  10 to 12 feet with rip currents expected. with most beaches 
  still fairly flat, extended run up is expected making it 
  dangerous for beachgoers. 

* timing...from 3 pm pdt sunday afternoon through 5 pm pst 
  monday afternoon. 

* location...coastline from sonoma county south through monterey 
  county. in particular west to northwest facing beaches... 
  including but not limited to...ocean beach...montara state 
  beach...marina state beach...monastery beach. 

* potential impacts...increased risk of ocean drowning. sneaker 
  waves often catch people off guard and knock them into the 
  ocean. rip currents can pull swimmers and surfers out to sea. 
  large breaking waves can cause injury, wash people off beaches 
  and rocks, and capsize small boats near shore. 

precautionary/preparedness actions...

a beach hazard statement for rip currents means that conditions
are present to support a heightened risk of strong rip currents.
rip currents are typically more frequent and stronger in the
vicinity of jetties...inlets...and piers. swimmers caught in a
rip current should swim parallel to the coast to escape the rip
current before trying to swim for shore. swimmers should always
swim near a lifeguard.

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. fisherman
should avoid fishing from rocks or jetties.

listen to noaa weather radio or your local media for the latest
updates on this situation.



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