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Latest Coastal/Lakeshore Hazard Messages by KMTR
Issued 10/30/2020 11:07 AM US/Pacific.
Valid through 11/2/2020 5:00 PM US/Pacific.
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.
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
* 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.
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.