Beach Hazards Statement 16, NWS San Francisco Bay Area, CA

467 
WHUS46 KMTR 292153
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
153 PM PST Tue Dec 29 2020

...Very Long Period Swell will Bring Dangerous Sneaker Waves...

..A very long period WNW swell will impact the Sonoma to Big Sur
coast tonight through Wednesday evening. Initial forerunner waves
of 21 to 23 seconds will begin to arrive along the Sonoma coast
late this afternoon before spreading southward during the evening
hours. Wave heights will rise by Wednesday morning to 5 to 9 feet
at a periodicity of 18 to 20 seconds. This will result in a high 
risk of sneaker waves. The largest energetic sneaker waves will 
arrive irregularly every few minutes to as infrequently as once 
every 30 minutes during otherwise deceptively calmer seas, and 
consequently may catch those on coastal jetties, rocks, piers, or 
shorelines offguard and may injure them or knock them into the 
cold, turbulent ocean. Beachcombing is not advised during this 
timeframe. In addition, strong rip currents will accompany the 
energetic wave train, particularly at WNW facing beaches. These 
types of events claim lives each year so extreme vigilance is 
advised if visiting the coast.

CAZ006-505-509-529-530-300700-
/O.CON.KMTR.BH.S.0016.201230T0200Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
153 PM PST Tue Dec 29 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 6 PM PST THIS
EVENING THROUGH WEDNESDAY EVENING...

* WHAT...A long period WNW swell with initial periods in excess of
  20 seconds will bring a threat of dangerous sneaker waves and
  strong rip currents to area beaches.

* WHERE...Entire coast from Sonoma southward through Big Sur, 
  excluding the sheltered northern portion of the Monterey Bay. 
  The main impacts will be felt at W-WNW beaches,including but 
  not limited to: Ocean beach, Montara state beach, Halfmoon Bay 
  state beach, Manresa state beach, Marina state beach.

* WHEN...From 6 PM PST this evening through Wednesday evening.

* IMPACTS...Potential sneaker waves will create dangerous
  conditions at area beaches. Steep beaches will have a higher
  risk of sneaker wave activity with greater wave run-up onto
  beaches. Occasionally larger waves will also wash over jetties
  and rock outcroppings that normally stay dry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Beach Hazard Statement for sneaker waves means that conditions
are present to support an increased danger 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. Beachcombing is not
advised.

&&

$$

663 
WHUS46 KMTR 300632
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
1032 PM PST Tue Dec 29 2020

...Very Long Period Swell will Bring Dangerous Sneaker Waves...

..A very long period WNW swell will impact the Sonoma to Big Sur
coast through Wednesday evening. Initial forerunner waves of 21 
to 23 seconds have arrived at the northern coastal waters and 
will spread southward overnight. Wave heights will rise by 
Wednesday morning to 5 to 9 feet at a periodicity of 18 to 20 
seconds. This will result in a high risk of sneaker waves. The 
largest energetic sneaker waves will arrive irregularly every few 
minutes to as infrequently as once every 30 minutes during 
otherwise deceptively calmer seas, and consequently may catch 
those on coastal jetties, rocks, piers, or shorelines offguard and
may injure them or knock them into the cold, turbulent ocean. 
Beachcombing is not advised during this timeframe. In addition, 
strong rip currents will accompany the energetic wave train, 
particularly at WNW facing beaches. These types of events claim 
lives each year so extreme vigilance is advised if visiting the 
coast.

CAZ006-505-509-529-530-301400-
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
1032 PM PST Tue Dec 29 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
EVENING...

* WHAT...A long period WNW swell with initial periods in excess 
  of 20 seconds will bring a threat of dangerous sneaker waves 
  and strong rip currents to area beaches. 

* WHERE...Entire coast from Sonoma southward through Big Sur, 
  excluding the sheltered northern portion of the Monterey Bay. 
  The main impacts will be felt at W-WNW beaches, including but 
  not limited to: Ocean beach, Montara state beach, Halfmoon Bay 
  state beach, Manresa state beach, Marina state beach. 

* WHEN...Now through Wednesday evening.

* IMPACTS...Potential sneaker waves will create dangerous 
  conditions at area beaches. Steep beaches will have a higher 
  risk of sneaker wave activity with greater wave run-up onto 
  beaches. Occasionally larger waves will also wash over jetties 
  and rock outcroppings that normally stay dry. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Beach Hazard Statement for sneaker waves means that conditions
are present to support an increased danger 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. Beachcombing is not
advised.

&&

$$

696 
WHUS46 KMTR 301113
CFWMTR

URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service San Francisco CA
313 AM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL BRING
HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY NIGHT...

..A very long period WNW swell train is now arriving along all of
our coast, with initial forerunner waves of 20 to 22 seconds. For
today into this evening, the primary hazard will be on the 
beaches where infrequent yet dangerous sneaker waves and stronger 
rip currents are expected. Then tonight and Thursday, the swell 
heights are forecast to increase and the primary hazard will shift
towards large breaking waves of up to roughly 20 feet at west and
northwest facing beaches. A beach hazard statement is in effect 
through this evening for the sneaker wave threat while a high surf
advisory is in effect for tonight through Thursday night for the 
large breaking waves expected. Cold water drownings occur each 
year with these type of events but are completely avoidable by 
remaining a safe distance from the coastline. If you must visit 
the coastline, avoid venturing out on coastal rocks, outcroppings,
jetties, etc, and remain extremely vigilant of your surroundings 
at all times.

CAZ006-505-509-529-530-302300-
/O.NEW.KMTR.CF.W.0002.201231T0500Z-210101T1100Z/
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
313 AM PST Wed Dec 30 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH 10 PM PST 
THIS EVENING... 
...HIGH SURF ADVISORY IN EFFECT FROM 10 PM PST THIS EVENING TO 3 
AM PST FRIDAY...

* WHAT...For the Beach Hazards Statement, infrequent yet dangerous
  sneaker waves are expected today and this evening. For the High
  Surf Advisory, dangerously large breaking waves of up to about
  20 feet at west to northwest beaches later tonight through
  Thursday night. Enhanced coastal run up, localized beach
  erosion, and stronger rip currents are expected throughout.

* WHERE...Main threat will be at west to northwest facings beaches
  along the entire coastline from Sonoma county southward through
  Big Sur in Monterey county. Excludes the Northern Monterey Bay
  (including Santa Cruz) due to this area being sheltered from the
  northwest seas.

* WHEN...For the Beach Hazards Statement, remains in effect
  through 10 PM PST this evening. For the High Surf Advisory, 
  from 10 PM PST tonight through 3 AM PST Friday morning.
 
* IMPACTS...Sneaker waves and large breaking waves can sweep
  people off jetties and docks, and into dangerous seas. Life-
  threatening swimming conditions and localized beach erosion can
  be expected. Cold water rescues or drownings are more likely
  with these waves and stronger rip currents.

* ADDITIONAL INFO...These types of events lead to cold water
  drownings each year so extreme vigilance is advised.

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. Fisherman should 
avoid fishing from rocks or jetties.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. 

A High Surf Advisory for large breaking waves means conditions 
are present to support large waves along the surf zone 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. 

&&

$$

898 
WHUS46 KMTR 301322
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
522 AM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL
BRING HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY
NIGHT...

..A very long period WNW swell train is now arriving along all of
our coast, with initial forerunner waves of 20 to 22 seconds. For
today into this evening, the primary hazard will be on the
beaches where infrequent yet dangerous sneaker waves and stronger
rip currents are expected. Then tonight and Thursday, the swell
heights are forecast to increase and the primary hazard will
shift towards large breaking waves of up to roughly 20 feet at
west and northwest facing beaches. A beach hazard statement is in
effect through this evening for the sneaker wave threat while a
high surf advisory is in effect for tonight through Thursday
night for the large breaking waves expected. Cold water drownings
occur each year with these type of events but are completely
avoidable by remaining a safe distance from the coastline. If you
must visit the coastline, avoid venturing out on coastal rocks,
outcroppings, jetties, etc, and remain extremely vigilant of your
surroundings at all times.

CAZ006-505-509-529-530-302300-
/O.CAN.KMTR.CF.W.0002.201231T0500Z-210101T1100Z/
/O.NEW.KMTR.SU.Y.0009.201231T0500Z-210101T1100Z/
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
522 AM PST Wed Dec 30 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
EVENING...
...HIGH SURF ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 3 AM
PST FRIDAY...
...COASTAL FLOOD WARNING IS CANCELLED...

* WHAT...For the Beach Hazards Statement, infrequent yet dangerous
  sneaker waves are expected today and this evening. For the High
  Surf Advisory, dangerously large breaking waves of up to about
  20 feet at west to northwest beaches later tonight through
  Thursday night. Enhanced coastal run up, localized beach
  erosion, and stronger rip currents are expected throughout.

* WHERE...Main threat will be at west to northwest facings beaches
  along the entire coastline from Sonoma county southward through
  Big Sur in Monterey county. Excludes the Northern Monterey Bay
  (including Santa Cruz) due to this area being sheltered from the
  northwest seas.

* WHEN...For the Beach Hazards Statement, remains in effect
  through 10 PM PST this evening. For the High Surf Advisory, 
  from 10 PM PST tonight through 3 AM PST Friday morning.
 
* IMPACTS...Sneaker waves and large breaking waves can sweep
  people off jetties and docks, and into dangerous seas. Life-
  threatening swimming conditions and localized beach erosion can
  be expected. Cold water rescues or drownings are more likely
  with these waves and stronger rip currents.

* ADDITIONAL INFO...These types of events lead to cold water
  drownings each year so extreme vigilance is advised.

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. Fisherman should 
avoid fishing from rocks or jetties.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. 

A High Surf Advisory for large breaking waves means conditions 
are present to support large waves along the surf zone 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. 

&&

$$

785 
WHUS46 KMTR 301401
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
601 AM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL
BRING HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY
NIGHT...

..A very long period WNW swell train is now arriving along all of
our coast, with initial forerunner waves of 20 to 22 seconds. For
today into this evening, the primary hazard will be on the
beaches where infrequent yet dangerous sneaker waves and stronger
rip currents are expected. Then tonight and Thursday, the swell
heights are forecast to increase and the primary hazard will
shift towards large breaking waves of up to roughly 20 feet at
west and northwest facing beaches. A beach hazard statement is in
effect through this evening for the sneaker wave threat while a
high surf advisory is in effect for tonight through Thursday
night for the large breaking waves expected. Cold water drownings
occur each year with these type of events but are completely
avoidable by remaining a safe distance from the coastline. If you
must visit the coastline, avoid venturing out on coastal rocks,
outcroppings, jetties, etc, and remain extremely vigilant of your
surroundings at all times.

CAZ006-505-509-529-530-302300-
/O.CON.KMTR.SU.Y.0009.201231T0500Z-210101T1100Z/
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
601 AM PST Wed Dec 30 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
EVENING...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
3 AM PST FRIDAY...

* WHAT...For the Beach Hazards Statement, infrequent yet 
  dangerous sneaker waves are expected today and this evening. 
  For the High Surf Advisory, dangerously large breaking waves 
  of up to about 20 feet at west to northwest beaches later 
  tonight through Thursday night. Enhanced coastal run up, 
  localized beach erosion, and stronger rip currents are 
  expected throughout.

* WHERE...Main threat will be at west to northwest facings 
  beaches along the entire coastline from Sonoma county 
  southward through Big Sur in Monterey county. Excludes the 
  Northern Monterey Bay (including Santa Cruz) due to this area 
  being sheltered from the northwest seas.

* WHEN...For the Beach Hazards Statement, remains in effect 
  through 10 PM PST this evening. For the High Surf Advisory, 
  from 10 PM PST tonight through 3 AM PST Friday morning.

* IMPACTS...Sneaker waves and large breaking waves can sweep
  people off jetties and docks, and into dangerous seas. Life-
  threatening swimming conditions and localized beach erosion can
  be expected. Cold water rescues or drownings are more likely
  with these waves and stronger rip currents.

* ADDITIONAL INFO...These types of events lead to cold water 
  drownings each year so extreme vigilance is advised.

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. Fisherman
should avoid fishing from rocks or jetties.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.

A High Surf Advisory for large breaking waves means conditions
are present to support large waves along the surf zone 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.

&&

$$

893 
WHUS46 KMTR 301522
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
722 AM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL
BRING HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY
NIGHT...

..A very long period WNW swell train has arrived along all of our
coast, with initial forerunner waves of 20 to 22 seconds. For 
today into this evening, the primary hazard will be on the beaches
where infrequent yet dangerous sneaker waves and stronger rip 
currents are expected. Then tonight and Thursday, the swell 
heights are forecast to increase and the primary hazard will shift
towards large breaking waves of up to roughly 20 feet at west and
northwest facing beaches. A Beach Hazard Statement is in effect 
through this evening for the sneaker wave threat while a High 
Surf Advisory is in effect for tonight through Thursday night for
the large breaking waves expected. Cold water drownings occur 
each year with these type of events but are completely avoidable 
by remaining a safe distance from the coastline. If you must visit
the coastline, avoid venturing out on coastal rocks, 
outcroppings, jetties, etc, and remain extremely vigilant of your 
surroundings at all times.

CAZ006-505-509-529-530-302330-
/O.EXT.KMTR.SU.Y.0009.201231T0600Z-210101T1100Z/
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
722 AM PST Wed Dec 30 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH THIS
EVENING...
...HIGH SURF ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING TO
3 AM PST FRIDAY...

* WHAT...For the Beach Hazards Statement, infrequent yet 
  dangerous sneaker waves are expected today and this evening. 
  For the High Surf Advisory, dangerously large breaking waves 
  of up to about 20 feet at west to northwest beaches later 
  tonight through Thursday night. Enhanced coastal run up, 
  localized beach erosion, and stronger rip currents are 
  expected throughout.

* WHERE...Main threat will be at west to northwest facings beaches
  along the entire coastline from Sonoma county southward through
  Big Sur in Monterey county. 

* WHEN...For the Beach Hazards Statement, through 10 PM this 
  evening. For the High Surf Advisory, from 10 PM this evening to 
  3 AM PST Friday. 

* IMPACTS...Sneaker waves and large breaking waves can sweep
  people off jetties and docks, and into dangerous seas. Life-
  threatening swimming conditions and localized beach erosion can
  be expected. Cold water rescues or drownings are more likely
  with these waves and stronger rip currents.

* ADDITIONAL INFO...These types of events lead to cold water 
  drownings each year so extreme vigilance is advised.

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. Fisherman
should avoid fishing from rocks or jetties.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.

A High Surf Advisory for large breaking waves means conditions
are present to support large waves along the surf zone 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.

&&

$$

350 
WHUS46 KMTR 302204
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
204 PM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL
BRING HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY
NIGHT...

..A very long period WNW swell train has arrived along all of our
coast. For today into this evening, the primary hazard will be on
the beaches where infrequent yet dangerous sneaker waves and 
stronger rip currents are expected. Then tonight and Thursday, the
swell heights are forecast to increase and the primary hazard 
will shift towards large breaking waves of up to roughly 20 feet 
at west and northwest facing beaches. A Beach Hazard Statement is 
in effect through this evening for the sneaker wave threat while a
High Surf Advisory is in effect for tonight through Thursday 
night for the large breaking waves expected. Cold water drownings 
occur each year with these type of events but are completely 
avoidable by remaining a safe distance from the coastline. If you 
must visit the coastline, avoid venturing out on coastal rocks, 
outcroppings, jetties, etc, and remain extremely vigilant of your 
surroundings at all times.

CAZ006-505-509-529-530-310700-
/O.CON.KMTR.SU.Y.0009.201231T0600Z-210101T1100Z/
/O.CON.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
204 PM PST Wed Dec 30 2020

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 10 PM PST THIS
EVENING...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 3 AM PST FRIDAY...

* WHAT...For the Beach Hazards Statement, infrequent yet 
  dangerous sneaker waves are expected today and this evening. 
  For the High Surf Advisory, dangerously large breaking waves 
  of up to about 20 feet at west to northwest beaches later 
  tonight through Thursday night. Enhanced coastal run up, 
  localized beach erosion, and stronger rip currents are 
  expected throughout.

* WHERE...Main threat will be at west to northwest facings beaches
  along the entire coastline from Sonoma county southward through
  Big Sur in Monterey county.

* WHEN...For the Beach Hazards Statement, through 10 PM this
  evening. For the High Surf Advisory, from 10 PM this evening to
  3 AM PST Friday.

* IMPACTS...Sneaker waves and large breaking waves can sweep
  people off jetties and docks, and into dangerous seas. Life-
  threatening swimming conditions and localized beach erosion can
  be expected. Cold water rescues or drownings are more likely
  with these waves and stronger rip currents.

* ADDITIONAL INFO...These types of events lead to cold water 
  drownings each year so extreme vigilance is advised.

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. Fisherman
should avoid fishing from rocks or jetties.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.

A High Surf Advisory for large breaking waves means conditions
are present to support large waves along the surf zone 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.

&&

$$

277 
WHUS46 KMTR 310535
CFWMTR

Coastal Hazard Message
National Weather Service San Francisco CA
935 PM PST Wed Dec 30 2020

...VERY LONG PERIOD AND INCREASINGLY LARGE NORTHWEST SWELL WILL
BRING HAZARDOUS CONDITIONS ALONG THE COAST THROUGH THURSDAY
NIGHT...

..A very long period WNW swell train has arrived along all of our
coast. Through the overnight hours and Thursday, the swell 
heights are forecast to increase and the primary hazard will shift
towards large breaking waves of up to roughly 20 feet at west and
northwest facing beaches. A High Surf Advisory is in effect for 
tonight through Thursday night for the large breaking waves that
are expected. Cold water drownings occur each year with these 
type of events but are completely avoidable by remaining a safe 
distance from the coastline. If you must visit the coastline, 
avoid venturing out on coastal rocks, outcroppings, jetties, etc, 
and remain extremely vigilant of your surroundings at all times.

CAZ006-505-509-529-530-311100-
/O.EXP.KMTR.BH.S.0016.000000T0000Z-201231T0600Z/
/O.CON.KMTR.SU.Y.0009.201231T0600Z-210101T1100Z/
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
San Francisco Peninsula Coast-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
935 PM PST Wed Dec 30 2020

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 3 AM PST FRIDAY...


* WHAT...Dangerously large breaking waves of up to about 20 feet 
  at west to northwest beaches later tonight through Thursday 
  night. Enhanced coastal run up, localized beach erosion, and 
  stronger rip currents are expected throughout.

* WHERE...Main threat will be at west to northwest facings 
  beaches along the entire coastline from Sonoma county 
  southward through Big Sur in Monterey county. 

* WHEN...Current through 3 AM PST Friday. 

* IMPACTS...Sneaker waves and large breaking waves can sweep 
  people off jetties and docks, and into dangerous seas. Life- 
  threatening swimming conditions and localized beach erosion 
  can be expected. Cold water rescues or drownings are more 
  likely with these waves and stronger rip currents. 

* ADDITIONAL INFO...These types of events lead to cold water 
  drownings each year so extreme vigilance is advised. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Surf Advisory for large breaking waves means conditions
are present to support large waves along the surf zone 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.

&&

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Surf Advisory for large breaking waves means conditions
are present to support large waves along the surf zone 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.

&&

$$