Alert archive / California / Hazardous Seas Warnings in 2021

Hazardous Seas Warning 48, NWS Eureka, CA

August 27, 2021

NWS Eureka, CA issued this hazardous seas warning at Aug 27, 2021, 2:16 AM PDT. It took effect at Aug 27, 2021, 6:00 PM PDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 27, 2021, 2:16 AM PDT (09:16 UTC)
In effect from
Aug 27, 2021, 6:00 PM PDT
Expired
Aug 28, 2021, 3:00 AM PDT
In force
9 hr
Issued by
NWS Eureka, CA

The text

As transmitted.

997 
WHUS76 KEKA 270916
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
216 AM PDT Fri Aug 27 2021

PZZ475-271730-
/O.CAN.KEKA.SC.Y.0086.000000T0000Z-210827T1300Z/
/O.EXT.KEKA.GL.W.0040.210827T1000Z-210828T1900Z/
/O.NEW.KEKA.SE.W.0049.210828T1900Z-210829T1200Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
216 AM PDT Fri Aug 27 2021

...GALE WARNING NOW IN EFFECT UNTIL NOON PDT SATURDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM NOON SATURDAY TO 5 AM
PDT SUNDAY...

* WHAT...For the Gale Warning, northwest winds 20 to 30 kt with 
  gusts up to 40 kt and seas 9 to 14 feet expected. For the 
  Hazardous Seas Warning, very steep and hazardous seas 10 to 14 
  feet expected.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...For the Gale Warning, until noon PDT Saturday. For the 
  Hazardous Seas Warning, from noon Saturday to 5 AM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


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.

&&

$$

PZZ450-271730-
/O.EXT.KEKA.SC.Y.0088.210827T1300Z-210828T0100Z/
/O.UPG.KEKA.SE.A.0011.210828T0200Z-210828T1600Z/
/O.NEW.KEKA.SE.W.0048.210828T0100Z-210828T1600Z/
Pt St George to Cape Mendocino out 10 nm-
216 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 6 AM THIS MORNING TO
6 PM PDT THIS EVENING...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 6 PM THIS EVENING TO
9 AM PDT SATURDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas to 12 feet expected. For the Small Craft Advisory, north
  winds 15 to 25 kt with gusts up to 40 kt near and downwind of Pt
  St George and seas 6 to 9 feet expected.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...For the Hazardous Seas Warning, from 6 PM this evening 
  to 9 AM PDT Saturday. For the Small Craft Advisory, from 6 AM 
  this morning to 6 PM PDT this evening.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ470-271730-
/O.EXT.KEKA.SC.Y.0088.000000T0000Z-210827T1600Z/
/O.EXT.KEKA.GL.W.0040.210827T1600Z-210829T1200Z/
Pt St George to Cape Mendocino 10 to 60 nm-
216 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
...GALE WARNING NOW IN EFFECT FROM 9 AM THIS MORNING TO 5 AM PDT
SUNDAY...

* WHAT...For the Gale Warning, north winds 30 to 40 kt with 
  gusts up to 45 kt and seas 10 to 15 feet expected. For the 
  Small Craft Advisory, north winds 20 to 30 kt and seas 7 to 10 
  feet.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...For the Gale Warning, from 9 AM this morning to 5 AM 
  PDT Sunday. For the Small Craft Advisory, until 9 AM PDT this 
  morning.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ455-271730-
/O.EXT.KEKA.SC.Y.0086.000000T0000Z-210828T2200Z/
Cape Mendocino to Pt Arena out 10 nm-
216 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM PDT SATURDAY...

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt near
  and downwind of Cape Mendocino and seas 7 to 10 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 PM PDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
5 follow-up statements
438 
WHUS76 KEKA 271517
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
817 AM PDT Fri Aug 27 2021

PZZ475-272330-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210828T1900Z/
/O.CON.KEKA.SE.W.0049.210828T1900Z-210829T1200Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
817 AM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL NOON PDT SATURDAY...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO
5 AM PDT SUNDAY...

* WHAT...For the Gale Warning, north winds 20 to 30 kt with 
  gusts up to 40 kt and seas 10 to 14 feet. For the Hazardous 
  Seas Warning, very steep and hazardous seas 10 to 14 feet 
  expected.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...For the Gale Warning, until noon PDT Saturday. For the 
  Hazardous Seas Warning, from noon Saturday to 5 AM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ470-272330-
/O.CON.KEKA.SC.Y.0088.000000T0000Z-210827T1600Z/
/O.CON.KEKA.GL.W.0040.210827T1600Z-210829T1200Z/
Pt St George to Cape Mendocino 10 to 60 nm-
817 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
...GALE WARNING REMAINS IN EFFECT UNTIL 5 AM PDT SUNDAY...

* WHAT...For the Gale Warning, north winds 25 to 35 kt with 
  gusts up to 45 kt and seas 10 to 15 feet expected. For the 
  Small Craft Advisory, north winds 25 to 30 kt and seas 8 to 10 
  feet.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...For the Gale Warning, until 5 AM PDT Sunday. For the 
  Small Craft Advisory, until 9 AM PDT this morning.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ450-272330-
/O.CON.KEKA.SC.Y.0088.000000T0000Z-210828T0100Z/
/O.CON.KEKA.SE.W.0048.210828T0100Z-210828T1600Z/
Pt St George to Cape Mendocino out 10 nm-
817 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 9 AM PDT SATURDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 8 to 12 feet expected. For the Small Craft Advisory, north
  winds 15 to 25 kt with gusts up to around 40 kt and seas 6 to 9
  feet.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...For the Hazardous Seas Warning, from 6 PM this evening 
  to 9 AM PDT Saturday. For the Small Craft Advisory, until 6 PM 
  PDT this evening.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ455-272330-
/O.CON.KEKA.SC.Y.0086.000000T0000Z-210828T2200Z/
Cape Mendocino to Pt Arena out 10 nm-
817 AM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT
SATURDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt and 
  seas 7 to 10 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 PM PDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
973 
WHUS76 KEKA 272114
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
214 PM PDT Fri Aug 27 2021

PZZ475-280515-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210828T1900Z/
/O.EXT.KEKA.SE.W.0049.210828T1900Z-210830T1000Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
214 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL NOON PDT SATURDAY...
...HAZARDOUS SEAS WARNING NOW IN EFFECT FROM NOON SATURDAY TO
3 AM PDT MONDAY...

* WHAT...For the Gale Warning, north winds 20 to 30 kt with 
  gusts up to 40 kt and seas 9 to 13 feet. For the Hazardous 
  Seas Warning, very steep and hazardous seas 10 to 14 feet 
  expected.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...For the Gale Warning, until noon PDT Saturday. For the 
  Hazardous Seas Warning, from noon Saturday to 3 AM PDT Monday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ470-280515-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210829T1200Z/
Pt St George to Cape Mendocino 10 to 60 nm-
214 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 5 AM PDT SUNDAY...

* WHAT...North winds 25 to 35 kt with gusts up to 45 kt and seas 
  11 to 16 feet.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...Until 5 AM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ450-280515-
/O.CON.KEKA.SC.Y.0088.000000T0000Z-210828T0100Z/
/O.CON.KEKA.SE.W.0048.210828T0100Z-210828T1600Z/
Pt St George to Cape Mendocino out 10 nm-
214 PM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM PDT THIS
EVENING...
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 9 AM PDT SATURDAY...

* WHAT...For the Hazardous Seas Warning, very steep and 
  hazardous seas 7 to 11 feet expected. For the Small Craft 
  Advisory, north winds 15 to 25 kt with gusts up to 40 kt and 
  seas 7 to 11 feet.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...For the Hazardous Seas Warning, from 6 PM this evening 
  to 9 AM PDT Saturday. For the Small Craft Advisory, until 6 PM 
  PDT this evening.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ455-280515-
/O.CON.KEKA.SC.Y.0086.000000T0000Z-210828T2200Z/
Cape Mendocino to Pt Arena out 10 nm-
214 PM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT
SATURDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt and 
  seas 6 to 9 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 PM PDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
255 
WHUS76 KEKA 280109
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
609 PM PDT Fri Aug 27 2021

PZZ475-280915-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210828T1900Z/
/O.CAN.KEKA.SE.W.0049.210828T1900Z-210830T1000Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
609 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL NOON PDT SATURDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas 
  9 to 13 feet.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...Until noon PDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ450-280915-
/O.EXP.KEKA.SC.Y.0088.000000T0000Z-210828T0100Z/
/O.CON.KEKA.SE.W.0048.000000T0000Z-210828T1600Z/
Pt St George to Cape Mendocino out 10 nm-
609 PM PDT Fri Aug 27 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 9 AM PDT
SATURDAY...

* WHAT...Very steep and hazardous seas 7 to 11 feet.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...Until 9 AM PDT Saturday.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ470-280915-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210829T1200Z/
Pt St George to Cape Mendocino 10 to 60 nm-
609 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 5 AM PDT SUNDAY...

* WHAT...North winds 25 to 35 kt with gusts up to 45 kt and seas 
  11 to 16 feet.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...Until 5 AM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ455-280915-
/O.CON.KEKA.SC.Y.0086.000000T0000Z-210828T2200Z/
Cape Mendocino to Pt Arena out 10 nm-
609 PM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT
SATURDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 35 kt and 
  seas 6 to 9 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 PM PDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
841 
WHUS76 KEKA 280334
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
834 PM PDT Fri Aug 27 2021

PZZ470-281145-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210829T1200Z/
Pt St George to Cape Mendocino 10 to 60 nm-
834 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 5 AM PDT SUNDAY...

* WHAT...North winds 25 to 35 kt with gusts up to 45 kt and seas 
  11 to 16 feet.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...Until 5 AM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ475-281145-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210828T1900Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
834 PM PDT Fri Aug 27 2021

...GALE WARNING REMAINS IN EFFECT UNTIL NOON PDT SATURDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas 
  9 to 13 feet.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...Until noon PDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

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.

&&

$$

PZZ450-281145-
/O.CON.KEKA.SE.W.0048.000000T0000Z-210828T1600Z/
Pt St George to Cape Mendocino out 10 nm-
834 PM PDT Fri Aug 27 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 9 AM PDT
SATURDAY...

* WHAT...Very steep and hazardous seas 7 to 11 feet.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...Until 9 AM PDT Saturday.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ455-281145-
/O.CON.KEKA.SC.Y.0086.000000T0000Z-210828T2200Z/
Cape Mendocino to Pt Arena out 10 nm-
834 PM PDT Fri Aug 27 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM PDT
SATURDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 35 kt and 
  seas 6 to 9 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 PM PDT Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
857 
WHUS76 KEKA 280929
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
229 AM PDT Sat Aug 28 2021

PZZ470-281730-
/O.EXT.KEKA.GL.W.0040.000000T0000Z-210829T1900Z/
/O.NEW.KEKA.SE.W.0050.210829T1900Z-210830T1000Z/
Pt St George to Cape Mendocino 10 to 60 nm-
229 AM PDT Sat Aug 28 2021

...GALE WARNING NOW IN EFFECT UNTIL NOON PDT SUNDAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM NOON SUNDAY TO 3 AM PDT
MONDAY...

* WHAT...For the Gale Warning, north winds 25 to 35 kt with 
  gusts up to 45 kt and seas 11 to 16 feet. For the Hazardous 
  Seas Warning, very steep and hazardous seas 10 to 13 feet 
  expected.

* WHERE...Pt St George to Cape Mendocino 10 to 60 nm.

* WHEN...For the Gale Warning, until noon PDT Sunday. For the 
  Hazardous Seas Warning, from noon Sunday to 3 AM PDT Monday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


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.

&&

$$

PZZ475-281730-
/O.CON.KEKA.GL.W.0040.000000T0000Z-210828T1900Z/
/O.NEW.KEKA.SE.W.0050.210828T1900Z-210829T2200Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
229 AM PDT Sat Aug 28 2021

...GALE WARNING REMAINS IN EFFECT UNTIL NOON PDT TODAY...
...HAZARDOUS SEAS WARNING IN EFFECT FROM NOON TODAY TO 3 PM PDT
SUNDAY...

* WHAT...For the Gale Warning, north winds 20 to 30 kt with 
  gusts up to 40 kt and seas 11 to 15 feet. For the Hazardous 
  Seas Warning, very steep and hazardous seas 10 to 14 feet 
  expected.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...For the Gale Warning, until noon PDT today. For the 
  Hazardous Seas Warning, from noon today to 3 PM PDT Sunday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


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.

&&

$$

PZZ450-281730-
/O.EXT.KEKA.SE.W.0048.000000T0000Z-210828T1000Z/
/O.NEW.KEKA.SC.Y.0089.210828T1000Z-210830T1000Z/
Pt St George to Cape Mendocino out 10 nm-
229 AM PDT Sat Aug 28 2021

...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 3 AM PDT EARLY THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM PDT MONDAY...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 9 to 11 feet. For the Small Craft Advisory, north winds 10
  to 20 kt with gusts up to 40 kt around Pt St George and seas 7 
  to 10 feet expected.

* WHERE...Pt St George to Cape Mendocino out 10 nm.

* WHEN...For the Hazardous Seas Warning, until 3 AM PDT early 
  this morning. For the Small Craft Advisory, until 3 AM PDT 
  Monday.

* IMPACTS...Very steep and hazardous seas could capsize or cause 
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$

PZZ455-281730-
/O.EXT.KEKA.SC.Y.0086.000000T0000Z-210830T1000Z/
Cape Mendocino to Pt Arena out 10 nm-
229 AM PDT Sat Aug 28 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM PDT MONDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 40 kt around
  Cape Mendocino and seas 7 to 10 feet.

* WHERE...Cape Mendocino to Pt Arena out 10 nm.

* WHEN...Until 3 AM PDT Monday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 2:16 AM PDTHazardous Seas WarningEKA16 hr

Nearby

Hazardous Seas Warnings in California, 2021Every hazardous seas warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.