Alert archive / California / Hazardous Seas Warnings in 2021

Hazardous Seas Warning 9, NWS Eureka, CA

January 24, 2021

NWS Eureka, CA issued this hazardous seas warning at Jan 24, 2021, 8:40 PM PST. It took effect at Jan 24, 2021, 9:00 PM PST. It was in force for 12 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
Jan 24, 2021, 8:40 PM PST (04:40 UTC)
In effect from
Jan 24, 2021, 9:00 PM PST
Expired
Jan 25, 2021, 9:00 AM PST
In force
12 hr
Issued by
NWS Eureka, CA

The text

As transmitted.

645 
WHUS76 KEKA 250440
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
840 PM PST Sun Jan 24 2021

PZZ450-251100-
/O.EXP.KEKA.GL.W.0006.000000T0000Z-210125T0500Z/
/O.NEW.KEKA.SE.W.0009.210125T0500Z-210125T1100Z/
Pt St George to Cape Mendocino out 10 nm-
840 PM PST Sun Jan 24 2021

...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 3 AM PST MONDAY...
...GALE WARNING WILL EXPIRE AT 9 PM PST THIS EVENING...

* WHAT...Very steep and hazardous seas 13 to 15 feet expected.

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

* WHEN...Until 3 AM PST 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.

&&

$$

PZZ455-251245-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena out 10 nm-
840 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  13 to 17 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$

PZZ470-250800-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T0800Z/
Pt St George to Cape Mendocino 10 to 60 nm-
840 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PST TONIGHT...

* WHAT...Northwest winds 20 to 25 kt with gusts up to 35 kt and 
  seas 16 to 19 feet.

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

* WHEN...Until midnight PST tonight.

* 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.

&&

$$

PZZ475-251245-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
840 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 35 kt and 
  seas 17 to 19 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$
4 follow-up statements
263 
WHUS76 KEKA 250459
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
859 PM PST Sun Jan 24 2021

PZZ455-251300-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena out 10 nm-
859 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  13 to 17 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$

PZZ470-250800-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T0800Z/
Pt St George to Cape Mendocino 10 to 60 nm-
859 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PST TONIGHT...

* WHAT...Northwest winds 20 to 25 kt with gusts up to 35 kt and 
  seas 16 to 19 feet.

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

* WHEN...Until midnight PST tonight.

* 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.

&&

$$

PZZ475-251300-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
859 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 35 kt and 
  seas 17 to 19 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$

PZZ450-251100-
/O.CON.KEKA.SE.W.0009.210125T0500Z-210125T1100Z/
Pt St George to Cape Mendocino out 10 nm-
859 PM PST Sun Jan 24 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 3 AM PST
MONDAY...

* WHAT...Very steep and hazardous seas 13 to 15 feet expected.

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

* WHEN...Until 3 AM PST 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.

&&

$$
836 
WHUS76 KEKA 250735
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1135 PM PST Sun Jan 24 2021

PZZ470-251100-
/O.EXP.KEKA.GL.W.0006.000000T0000Z-210125T0800Z/
/O.EXB.KEKA.SE.W.0009.210125T0800Z-210125T1100Z/
Pt St George to Cape Mendocino 10 to 60 nm-
1135 PM PST Sun Jan 24 2021

...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 3 AM PST MONDAY...
...GALE WARNING WILL EXPIRE AT MIDNIGHT PST TONIGHT...

* WHAT...Very steep and hazardous seas 16 to 18 feet expected.

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

* WHEN...Until 3 AM PST 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.

&&

$$

PZZ455-251545-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena out 10 nm-
1135 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  13 to 17 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$

PZZ475-251545-
/O.CON.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
1135 PM PST Sun Jan 24 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PST MONDAY...

* WHAT...Northwest winds 25 to 30 kt with gusts up to 35 kt and 
  seas 17 to 19 feet.

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

* WHEN...Until 9 AM PST 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.

&&

$$

PZZ450-251100-
/O.CON.KEKA.SE.W.0009.000000T0000Z-210125T1100Z/
Pt St George to Cape Mendocino out 10 nm-
1135 PM PST Sun Jan 24 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 3 AM PST
MONDAY...

* WHAT...Very steep and hazardous seas 13 to 15 feet.

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

* WHEN...Until 3 AM PST 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.

&&

$$
450 
WHUS76 KEKA 251053
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
253 AM PST Mon Jan 25 2021

PZZ475-251900-
/O.CAN.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
/O.EXB.KEKA.SE.W.0009.000000T0000Z-210125T1700Z/
/O.NEW.KEKA.GL.A.0007.210126T1700Z-210127T0500Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
253 AM PST Mon Jan 25 2021

...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 9 AM PST THIS MORNING...
...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

* WHAT...For the Hazardous Seas Warning, very steep and hazardous
  seas 16 to 18 feet. For the Gale Watch, south winds 25 to 35 kt
  with gusts up to 50 kt and seas 12 to 17 feet possible.

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

* WHEN...For the Hazardous Seas Warning, until 9 AM PST this 
  morning. For the Gale Watch, from Tuesday morning through 
  Tuesday evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ455-251900-
/O.CAN.KEKA.GL.W.0006.000000T0000Z-210125T1700Z/
/O.NEW.KEKA.SC.Y.0011.210125T1100Z-210126T1700Z/
/O.NEW.KEKA.GL.A.0007.210126T1700Z-210127T0500Z/
Cape Mendocino to Pt Arena out 10 nm-
253 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PST TUESDAY...
...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

* WHAT...For the Small Craft Advisory, north winds 15 to 25 kt 
  with gusts up to 30 kt and seas 12 to 17 feet expected. For 
  the Gale Watch, southeast winds 25 to 35 kt with gusts up to 
  45 kt and seas 11 to 16 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Gale Watch, from Tuesday morning through Tuesday 
  evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ450-251900-
/O.EXP.KEKA.SE.W.0009.000000T0000Z-210125T1100Z/
/O.NEW.KEKA.SC.Y.0011.210125T1100Z-210126T1700Z/
/O.NEW.KEKA.GL.A.0007.210126T1700Z-210127T0300Z/
Pt St George to Cape Mendocino out 10 nm-
253 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PST TUESDAY...
...GALE WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

* WHAT...For the Small Craft Advisory, north winds 10 to 20 kt 
  with gusts up to 25 kt and seas 12 to 14 feet expected. For 
  the Gale Watch, southeast winds 25 to 35 kt with gusts up to 
  50 kt and seas 10 to 15 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Gale Watch, from Tuesday morning through Tuesday 
  evening.

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


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ470-251900-
/O.EXP.KEKA.SE.W.0009.000000T0000Z-210125T1100Z/
/O.NEW.KEKA.SC.Y.0011.210125T1100Z-210126T1700Z/
/O.NEW.KEKA.SR.A.0002.210126T1700Z-210127T0300Z/
Pt St George to Cape Mendocino 10 to 60 nm-
253 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM PST TUESDAY...
...STORM WATCH IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
EVENING...

* WHAT...For the Small Craft Advisory, northwest winds 10 to 20 
  kt with gusts up to 30 kt and seas 14 to 16 feet expected. For 
  the Storm Watch, south winds 35 to 45 kt with gusts up to 55 
  kt and seas 13 to 17 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Storm Watch, from Tuesday morning through Tuesday 
  evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare to remain in port, alter course, and/or
secure the vessel for severe conditions before conditions
deteriorate.

&&

$$
258 
WHUS76 KEKA 251642
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
842 AM PST Mon Jan 25 2021

PZZ475-260045-
/O.EXP.KEKA.SE.W.0009.000000T0000Z-210125T1700Z/
/O.CON.KEKA.GL.A.0007.210126T1700Z-210127T0500Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
842 AM PST Mon Jan 25 2021

...GALE WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...
...HAZARDOUS SEAS WARNING WILL EXPIRE AT 9 AM PST THIS MORNING...

* WHAT...South winds 25 to 35 kt with gusts up to 50 kt and seas 
  12 to 17 feet possible.

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

* WHEN...From Tuesday morning through Tuesday evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ450-260045-
/O.CON.KEKA.SC.Y.0011.000000T0000Z-210126T1700Z/
/O.CON.KEKA.GL.A.0007.210126T1700Z-210127T0300Z/
Pt St George to Cape Mendocino out 10 nm-
842 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST
TUESDAY...
...GALE WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

* WHAT...For the Small Craft Advisory, seas 11 to 14 feet. For 
  the Gale Watch, southeast winds 25 to 35 kt with gusts up to 
  50 kt and seas 10 to 15 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Gale Watch, from Tuesday morning through Tuesday 
  evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ455-260045-
/O.CON.KEKA.SC.Y.0011.000000T0000Z-210126T1700Z/
/O.CON.KEKA.GL.A.0007.210126T1700Z-210127T0500Z/
Cape Mendocino to Pt Arena out 10 nm-
842 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST
TUESDAY...
...GALE WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

* WHAT...For the Small Craft Advisory, north winds 10 to 20 kt 
  with gusts up to 30 kt and seas 11 to 15 feet. For the Gale 
  Watch, southeast winds 25 to 35 kt with gusts up to 45 kt and 
  seas 11 to 16 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Gale Watch, from Tuesday morning through Tuesday 
  evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ470-260045-
/O.CON.KEKA.SC.Y.0011.000000T0000Z-210126T1700Z/
/O.CON.KEKA.SR.A.0002.210126T1700Z-210127T0300Z/
Pt St George to Cape Mendocino 10 to 60 nm-
842 AM PST Mon Jan 25 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST
TUESDAY...
...STORM WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...

* WHAT...For the Small Craft Advisory, northwest winds 10 to 20 
  kt with gusts up to 25 kt and seas 13 to 16 feet. For the 
  Storm Watch, south winds 35 to 45 kt with gusts up to 55 kt 
  and seas 13 to 17 feet possible.

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

* WHEN...For the Small Craft Advisory, until 9 AM PST Tuesday. 
  For the Storm Watch, from Tuesday morning through Tuesday 
  evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare to remain in port, alter course, and/or
secure the vessel for severe conditions before conditions
deteriorate.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 25, 2:53 AM PSTGale WatchEKA12 hr
Jan 25, 2:53 AM PSTSmall Craft AdvisoryEKA30 hr
Jan 25, 2:53 AM PSTStorm WatchEKA12 hr
Jan 25, 2:43 PM PSTGale WarningEKA30 hr
Jan 25, 2:43 PM PSTStorm WarningEKA28 hr
Jan 25, 3:00 PM PSTWinter Storm WarningEKADel Norte, Humboldt, Lake, Mendocino, Trinity45 hr
Jan 25, 3:00 PM PSTWinter Weather AdvisoryEKA3 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.