Small Craft Advisory 142, NWS Los Angeles, CA

450 
WHUS76 KLOX 240949
MWWLOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
249 AM PDT Sun Oct 24 2021

PZZ676-241800-
/O.EXP.KLOX.SC.Y.0141.000000T0000Z-211024T1000Z/
/O.NEW.KLOX.SC.Y.0143.211025T1200Z-211026T1200Z/
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
249 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 5 AM MONDAY TO 5 AM PDT
TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Outer waters from Santa Cruz Island to San Clemente 
  Island to 60 NM offshore including San Nicolas and Santa 
  Barbara Islands.

* WHEN...From 5 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ670-673-241800-
/O.CON.KLOX.SC.Y.0141.000000T0000Z-211025T0100Z/
/O.UPG.KLOX.GL.A.0038.211025T0100Z-211025T1300Z/
/O.NEW.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
249 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT
MONDAY...

* WHAT...South winds 20 to 30 kt with gusts up to 35 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM 
  and Waters from Pt. Sal to Santa Cruz Island CA and westward 
  60 nm including San Miguel and Santa Rosa Islands.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ645-241800-
/O.CON.KLOX.SC.Y.0142.000000T0000Z-211025T0100Z/
/O.UPG.KLOX.GL.A.0038.211025T0100Z-211025T1300Z/
/O.NEW.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
249 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM PDT
MONDAY...

* WHAT...South winds 20 to 25 kt with gusts up to 35 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal westward out to 10 
  NM.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ650-241800-
/O.NEW.KLOX.SC.Y.0143.211025T1500Z-211026T1200Z/
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
249 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM MONDAY TO 5 AM PDT
TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...East Santa Barbara Channel from Pt. Conception to Pt. 
  Mugu CA including Santa Cruz Island.

* WHEN...From 8 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ655-241800-
/O.NEW.KLOX.SC.Y.0143.211025T1800Z-211026T1200Z/
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
249 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM MONDAY TO 5 AM PDT
TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Inner waters from Point Mugu to San Mateo Pt. CA 
  including Santa Catalina and Anacapa Islands.

* WHEN...From 11 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

431 
WHUS76 KLOX 241549
MWWLOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
849 AM PDT Sun Oct 24 2021

PZZ670-673-250000-
/O.CON.KLOX.SC.Y.0141.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
849 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PDT MONDAY...

* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM 
  and Waters from Pt. Sal to Santa Cruz Island CA and westward 
  60 nm including San Miguel and Santa Rosa Islands.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ645-250000-
/O.CON.KLOX.SC.Y.0142.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
849 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PDT MONDAY...

* WHAT...South winds 20 to 30 kt with gusts up to 35 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal westward out to 10 
  NM.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ650-250000-
/O.CON.KLOX.SC.Y.0143.211025T1500Z-211026T1200Z/
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
849 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...East Santa Barbara Channel from Pt. Conception to Pt. 
  Mugu CA including Santa Cruz Island.

* WHEN...From 8 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ655-250000-
/O.CON.KLOX.SC.Y.0143.211025T1800Z-211026T1200Z/
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
849 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 11 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Inner waters from Point Mugu to San Mateo Pt. CA 
  including Santa Catalina and Anacapa Islands.

* WHEN...From 11 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ676-250000-
/O.CON.KLOX.SC.Y.0143.211025T1200Z-211026T1200Z/
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
849 AM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Outer waters from Santa Cruz Island to San Clemente 
  Island to 60 NM offshore including San Nicolas and Santa 
  Barbara Islands.

* WHEN...From 5 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

631 
WHUS76 KLOX 242107
MWWLOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
207 PM PDT Sun Oct 24 2021

PZZ670-673-250515-
/O.CON.KLOX.SC.Y.0141.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
207 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PDT MONDAY...

* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM 
  and Waters from Pt. Sal to Santa Cruz Island CA and westward 
  60 nm including San Miguel and Santa Rosa Islands.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ645-250515-
/O.CON.KLOX.SC.Y.0142.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
207 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM
PDT MONDAY...

* WHAT...South winds 20 to 30 kt with gusts up to 35 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal westward out to 10 
  NM.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ650-250515-
/O.CON.KLOX.SC.Y.0143.211025T1500Z-211026T1200Z/
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
207 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...East Santa Barbara Channel from Pt. Conception to Pt. 
  Mugu CA including Santa Cruz Island.

* WHEN...From 8 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ655-250515-
/O.CON.KLOX.SC.Y.0143.211025T1800Z-211026T1200Z/
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
207 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 11 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Inner waters from Point Mugu to San Mateo Pt. CA 
  including Santa Catalina and Anacapa Islands.

* WHEN...From 11 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ676-250515-
/O.CON.KLOX.SC.Y.0143.211025T1200Z-211026T1200Z/
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
207 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 AM MONDAY TO
5 AM PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Outer waters from Santa Cruz Island to San Clemente 
  Island to 60 NM offshore including San Nicolas and Santa 
  Barbara Islands.

* WHEN...From 5 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

573 
WHUS76 KLOX 250034
MWWLOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
534 PM PDT Sun Oct 24 2021

PZZ670-673-250845-
/O.EXP.KLOX.SC.Y.0141.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
534 PM PDT Sun Oct 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM PDT MONDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 6 PM PDT THIS EVENING...

* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM 
  and Waters from Pt. Sal to Santa Cruz Island CA and westward 
  60 nm including San Miguel and Santa Rosa Islands.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ645-250845-
/O.EXP.KLOX.SC.Y.0142.000000T0000Z-211025T0100Z/
/O.CON.KLOX.GL.W.0047.211025T0100Z-211025T1300Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
534 PM PDT Sun Oct 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 6 AM PDT MONDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 6 PM PDT THIS EVENING...

* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and 
  combined seas 8 to 13 feet expected when conditions are worst.

* WHERE...Point Piedras Blancas to Point Sal westward out to 10 
  NM.

* WHEN...For the Gale Warning, from 6 PM this evening to 6 AM 
  PDT Monday. For the Small Craft Advisory, until 6 PM PDT this 
  evening.

* IMPACTS...Strong winds will create dangerous sea conditions 
  which could capsize or damage small and large vessels.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

PZZ650-250845-
/O.EXT.KLOX.SC.Y.0143.211025T1300Z-211026T1200Z/
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
534 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 6 AM MONDAY TO 5 AM
PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...East Santa Barbara Channel from Pt. Conception to Pt. 
  Mugu CA including Santa Cruz Island.

* WHEN...From 6 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ655-250845-
/O.EXT.KLOX.SC.Y.0143.211025T1300Z-211026T1200Z/
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
534 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 6 AM MONDAY TO 5 AM
PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Inner waters from Point Mugu to San Mateo Pt. CA 
  including Santa Catalina and Anacapa Islands.

* WHEN...From 6 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

PZZ676-250845-
/O.EXT.KLOX.SC.Y.0143.211025T1000Z-211026T1200Z/
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
534 PM PDT Sun Oct 24 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 3 AM MONDAY TO 5 AM
PDT TUESDAY...

* WHAT...Hazardous sea conditions.

* WHERE...Outer waters from Santa Cruz Island to San Clemente 
  Island to 60 NM offshore including San Nicolas and Santa 
  Barbara Islands.

* WHEN...From 3 AM Monday to 5 AM PDT Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

Area Forecast Discussion
National Weather Service Los Angeles/Oxnard CA
816 PM PDT Sat Oct 23 2021

.SYNOPSIS...23/644 PM.

Quiet weather is expected across Southwest California through
Sunday afternoon, with partly to mostly cloudy skies and
seasonable temperatures. A Pacific storm system will bring
widespread moderate to heavy rain to the area Sunday night and
Monday, along with gusty winds and cooler temperatures. Warming
and drying are expected the rest of next week.

&&

.SHORT TERM (SAT-TUE)...23/815 PM.

Satellite imagery showing an influx of higher level clouds
in advance of a strong Atmospheric River storm system developing
in the eastern Pacific. One short term concern tonight is
gusty northwest winds across the western portions of the Santa
Barbara south coast and Santa Ynez mountains, where a wind
advisory is in effect for wind gusts up to 45 mph. Gusty winds
are also occurring across the I-5 corridor and Antelope Valley
tonight but not quite advisory levels.

Some warm air advection in advance of the approaching storm
system will bring slight warming to many areas on Sunday, with a
continuation of partly to mostly cloudy skies. Some warm frontal
light rains may begin as early as late Sunday afternoon across the
northern portions of San Luis Obispo county, then expected to
overspread much of San Luis Obispo and Santa Barbara counties on
Sunday night. Even during the warm-frontal precipitation, we could
see some orographic enhancement along the Santa Lucia and Santa
Ynez ranges due to increasing south to southwest low level wind
flow.

While the focus of this atmospheric river event will be across
northern and central California, an unusually strong late October
cold front will bring moderate to heavy rainfall across Southwest
California, starting across the Central Coast late Sunday night,
then moving into areas south of Point Conception on Monday. This
system has a combination of ample moisture (with precipitable
water values up to 1.5 inches) along with fairly strong dynamics
and orographic enhancement due to south-southwest low level flow
of 30-50 knots in the boundary layer. Overall rainfall projections
still generally on track with 1-3 inches for much of San Luis
Obispo and Santa Barbara counties, except locally up to 4 inches
across the northwestern portions of the San Lucia range. Most of
LA/Ventura counties are expected to see between 0.50 and 1.50
inches, except locally up to 1.75 inches in the foothills and
coastal slopes. However, latest high resolution models starting to
ramp up rain totals for the foothills and coastal slopes of
western Ventura county, so QPF for this area may need to be
adjusted upward if this trend continues.

Projected rainfall intensities will generally range between 0.25
to 0.50 inches per hour with the cold front, except local
intensities up to 0.75 inch per hour (mainly San Luis Obispo and
Santa Barbara counties). These types of rainfall rates will likely
result in flood advisories issued for shallow debris flows and
rockslides in recent burn areas, including the Alisal burn scar
in Santa Barbara county. High resolution models starting to show
the possibility of embedded heavier downpours within the cold
front, especially in San Luis Obispo and Santa Barbara counties.
As a result, there is a slight chance that USGS 15, 30, or 60
minute warning thresholds could be reached for the Alisal burn
scar which could result in more significant debris flow activity.
For that reason, later shifts may need to consider issuance of a
Flash Flood Watch for the Alisal burn scar if high resolution
model data continues to show the threat of these embedded heavier
downpours. At this time, it appears the highest rainfall
intensities will impact the Alisal burn scar between 7 am and 11
am on Monday.

Snow is not going to be a factor with this weather system as snow
levels should remain well above 8000 feet until the tail end of
the event Mon evening. In addition, the coldest air and most
unstable airmass with this storm will remain over northern and
central CA thru Mon, resulting in a minimal thunderstorm threat
(5-10%) across our forecast area.

*** From previous discussion ***

Strong and gusty S to SW winds ahead of the main front can be
expected across the region Sun night and Mon. Winds may even reach
High-end Advisory levels for much of SLO/SBA Counties later Sun
night into Mon morning, and Wind Advisories will likely be needed.

As far as temperatures, it will turn even cooler on Mon with the
clouds and rain over the region. Highs will be about 7-14 deg
below seasonal norms, and only reach into the upper 50s and 60s
for the coast and vlys.

The upper level trof will move further to the E later Mon night
thru Tue, allowing H5 heights to increase to near 583 dam. There
will also be rather sharp offshore pressure gradient trends thru
the day. Skies will become mostly clear for most areas Mon night
with sunny skies on Tue. Temps on Tue will be a few degrees warmer
than Mon, but highs will still be about 5-10 deg below normal for
many areas.

.LONG TERM (WED-SAT)...23/142 PM.

Upper level ridging will continue to build into srn CA Wed and
Thu, with H5 heights up to around 586 dam. A weak upper level
trof should move into the area on Fri, then some upper level
ridging should move back in on Sat. Offshore gradients to the N
and E are expected Wed and Thu, then offshore gradients mainly to
the N are forecast for Fri into Sat. Breezy to gusty N to NE
winds will be possible mainly night and morning hours in the usual
wind-prone areas thru mid week. Mostly clear skies can be
expected across the region thru Fri, then some marine layer clouds
may develop along coastal areas Fri night into Sat morning with
clearing by afternoon. A warming trend is expected during the
extended period, with temps increasing to several degrees above
normal in most areas by Thu or Fri.

&&

.AVIATION...24/0018Z.

At 2230Z at KLAX, there a deep moist layer with a depth of 5200
feet.

Low to moderate confidence in the 00Z TAFs. Low confidence in the
timing and height of marine layer cigs that may affect coastal and
some valley locations. Any cigs are expected to be MVFR, with a
chance of IFR cigs at KSMX. Lower confidence in timing of rain
moving into the area Sun afternoon and night. Generally expect
only KPRB and KSBP to have any chance of rain by 00Z.

Generally high confidence at KPMD, KWJF with VFR conditions thru
the period. Strong and gusty SW winds will continue into this
evening for this area.

KLAX...Moderate confidence in the 00Z TAF. Low clouds and fog
with a mix of MVFR and VFR cigs are expected through 18Z Sun
morning. Timing between flight cats may be off several hours. East
wind component should remain below 6 kt Sun morning.

KBUR...Low to moderate confidence in the 00Z TAF. There is a 30-40
percent chance of VFR conditions tonight.

&&

.MARINE...23/1121 AM.

Moderate to high confidence in Small Craft Advisory (SCA) winds
20 to 30 knots continuing for the outer waters through tonight.
SCA is also in effect for the western portions of the southern
inner waters. The winds will generate choppy seas over all waters
through at least tonight, with 3 to 5 foot 6 second period waves
common. High confidence in a long period swell leading to greater
than 10 foot (SCA threshold) seas off the Central Coast through
Saturday.

A storm system is still on track to impact the area Sunday and
Monday. This storm will bring a period of gusty SW winds
everywhere, including a 70 percent chance of 6 or so hours of Gale
Force Winds north of Point Arguello Sunday Night. This storm will
also bring a large swell impacting all areas by Monday and last
through Wednesday, peaking Monday afternoon through early Tuesday.
During this peak, large breaking waves will pose dangers to boats
and divers nearshore, with breaking waves possible over the Morro
Bay and Ventura Harbor entrances. The chance of thunderstorms is
minimal.

&&

.BEACHES...23/1138 AM.

High Surf Advisories are in effect for the Central Coast and
Ventura County, with a Beach Hazards Statement for Los Angeles
County (which is likely to be borderline High Surf). This is to
cover the increasing surf through 10 pm tonight, but also to
message the larger more impactful swell and surf for Monday and
Tuesday.

Moderate to high confidence in a very large west-northwest swell
peaking at 15 to 20 feet with a 17 second period over the Central
Coast, with about half those heights for the inner waters from
Santa Barbara to Orange County. The peak of the swell will be
Monday afternoon through early Tuesday morning. A swell this size
will result in High Surf Advisories and dangerous currents over
nearly all coasts. There is a chance that surf heights reach
around 20 feet on the Central Coast, which could result in damage
to coastal structures like piers. A High Surf Warning will be
considered in the coming days.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...High Surf Advisory in effect until 10 PM PDT this evening for
      zones 34-35-40. (See LAXCFWLOX).
     High Surf Advisory in effect from 3 AM Monday to 3 AM PDT
      Wednesday for zones 34-35. (See LAXCFWLOX).
     Wind Advisory in effect until 3 AM PDT Sunday for zones
      39-52. (See LAXNPWLOX).
     High Surf Advisory in effect from 7 AM Monday to 3 AM PDT
      Wednesday for zones 39-40. (See LAXCFWLOX).
     Beach Hazards Statement in effect until 10 PM PDT this
      evening for zones 41-87. (See LAXCFWLOX).
     High Surf Advisory in effect from 11 AM Monday to 3 AM PDT
      Wednesday for zones 41-87. (See LAXCFWLOX).
PZ...Small Craft Advisory in effect until 9 PM PDT this evening
      for zones 645-650-655. (See LAXMWWLOX).
     Gale Watch in effect from Sunday evening through late Sunday
      night for zones 645-670-673. (See LAXMWWLOX).
     Small Craft Advisory in effect until 3 AM PDT Sunday for
      zones 670-673-676. (See LAXMWWLOX).

&&

.HAZARD POTENTIAL OUTLOOK (TUE-SAT).

High surf and dangerous rip currents will affect area beaches
Tuesday through Wednesday, largest into Tuesday with potential
harbor closures.

&&

PUBLIC...Gomberg/Sirard
AVIATION...Smith
MARINE...Sweet/Phillips/Gomberg
BEACHES...Sweet/Kittell/Gomberg/Sirard
SYNOPSIS...Sirard/Smith

weather.gov/losangeles