Alert archive / California / Hazardous Seas Warnings in 2021

Hazardous Seas Warning 25, NWS Eureka, CA

March 30, 2021

NWS Eureka, CA issued this hazardous seas warning at Mar 30, 2021, 9:01 PM PDT. It was in force for 10 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
Mar 30, 2021, 9:01 PM PDT (04:01 UTC)
Expired
Mar 31, 2021, 7:00 AM PDT
In force
10 hr
Issued by
NWS Eureka, CA

The text

As transmitted.

854 
WHUS76 KEKA 310401
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
901 PM PDT Tue Mar 30 2021

PZZ450-311215-
/O.CAN.KEKA.SE.W.0023.000000T0000Z-210331T0700Z/
/O.NEW.KEKA.SC.Y.0040.210331T0401Z-210331T1300Z/
Pt St George to Cape Mendocino out 10 nm-
901 PM PDT Tue Mar 30 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM PDT WEDNESDAY...
...HAZARDOUS SEAS WARNING IS CANCELLED...

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt and seas 
  8 to 11 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ475-311215-
/O.EXP.KEKA.GL.W.0020.000000T0000Z-210331T0400Z/
/O.NEW.KEKA.SE.W.0025.210331T0401Z-210331T1300Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
901 PM PDT Tue Mar 30 2021

...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 6 AM PDT WEDNESDAY...
...GALE WARNING HAS EXPIRED...

* WHAT...Very steep and hazardous seas 10 to 15 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

* 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.

&&

$$

PZZ455-311215-
/O.EXP.KEKA.SE.W.0024.000000T0000Z-210331T0400Z/
/O.NEW.KEKA.SC.Y.0040.210331T0401Z-210331T1300Z/
Cape Mendocino to Pt Arena out 10 nm-
901 PM PDT Tue Mar 30 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM PDT WEDNESDAY...
...HAZARDOUS SEAS WARNING HAS EXPIRED...

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt and seas 
  7 to 10 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ470-310700-
/O.CON.KEKA.GL.W.0020.000000T0000Z-210331T0700Z/
Pt St George to Cape Mendocino 10 to 60 nm-
901 PM PDT Tue Mar 30 2021

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

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas 
  11 to 14 feet.

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

* WHEN...Until midnight PDT 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.

&&

$$
3 follow-up statements
648 
WHUS76 KEKA 310645
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1145 PM PDT Tue Mar 30 2021

PZZ470-311300-
/O.EXP.KEKA.GL.W.0020.000000T0000Z-210331T0700Z/
/O.EXB.KEKA.SE.W.0025.210331T0700Z-210331T1300Z/
Pt St George to Cape Mendocino 10 to 60 nm-
1145 PM PDT Tue Mar 30 2021

...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 6 AM PDT WEDNESDAY...
...GALE WARNING WILL EXPIRE AT MIDNIGHT PDT TONIGHT...

* WHAT...Very steep and hazardous seas 11 to 13 feet expected.

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

* WHEN...Until 6 AM PDT Wednesday.

* 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.

&&

$$

PZZ475-311300-
/O.CON.KEKA.SE.W.0025.000000T0000Z-210331T1300Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
1145 PM PDT Tue Mar 30 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 6 AM PDT
WEDNESDAY...

* WHAT...Very steep and hazardous seas 9 to 13 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

* 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.

&&

$$

PZZ450-311300-
/O.CON.KEKA.SC.Y.0040.000000T0000Z-210331T1300Z/
Pt St George to Cape Mendocino out 10 nm-
1145 PM PDT Tue Mar 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM PDT
WEDNESDAY...

* WHAT...North winds 5 to 15 kt and seas 8 to 10 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ455-311300-
/O.CON.KEKA.SC.Y.0040.000000T0000Z-210331T1300Z/
Cape Mendocino to Pt Arena out 10 nm-
1145 PM PDT Tue Mar 30 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM PDT
WEDNESDAY...

* WHAT...Seas 5 to 8 feet.

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

* WHEN...Until 6 AM PDT Wednesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
079 
WHUS76 KEKA 310947
MWWEKA

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
247 AM PDT Wed Mar 31 2021

PZZ470-311400-
/O.EXT.KEKA.SE.W.0025.000000T0000Z-210331T1400Z/
Pt St George to Cape Mendocino 10 to 60 nm-
247 AM PDT Wed Mar 31 2021

...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Very steep and hazardous seas 8 to 13 feet.

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

* WHEN...Until 7 AM PDT this morning.

* 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.

&&

$$

PZZ475-311400-
/O.EXT.KEKA.SE.W.0025.000000T0000Z-210331T1400Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
247 AM PDT Wed Mar 31 2021

...HAZARDOUS SEAS WARNING NOW IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Very steep and hazardous seas 8 to 13 feet.

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

* WHEN...Until 7 AM PDT this morning.

* 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.

&&

$$

PZZ450-311400-
/O.EXT.KEKA.SC.Y.0040.000000T0000Z-210331T1400Z/
Pt St George to Cape Mendocino out 10 nm-
247 AM PDT Wed Mar 31 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Seas 7 to 10 feet.

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

* WHEN...Until 7 AM PDT this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ455-311400-
/O.EXT.KEKA.SC.Y.0040.000000T0000Z-210331T1400Z/
Cape Mendocino to Pt Arena out 10 nm-
247 AM PDT Wed Mar 31 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Seas 5 to 8 feet.

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

* WHEN...Until 7 AM PDT this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
139 
WHUS76 KEKA 311316 AAA
MWWEKA

URGENT - MARINE WEATHER MESSAGE...UPDATED
National Weather Service Eureka CA
616 AM PDT Wed Mar 31 2021

PZZ470-312000-
/O.CON.KEKA.SE.W.0025.000000T0000Z-210331T1400Z/
/O.EXB.KEKA.SC.Y.0040.210331T1400Z-210331T2000Z/
Pt St George to Cape Mendocino 10 to 60 nm-
616 AM PDT Wed Mar 31 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 7 AM PDT THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM PDT THIS AFTERNOON...

* WHAT...For the Hazardous Seas Warning, very steep and 
  hazardous seas 8 to 10 feet. For the Small Craft Advisory, 
  seas 7 to 10 feet expected.

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

* WHEN...For the Hazardous Seas Warning, until 7 AM PDT this 
  morning. For the Small Craft Advisory, until 1 PM PDT this 
  afternoon.

* 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.

&&

$$

PZZ475-312000-
/O.CON.KEKA.SE.W.0025.000000T0000Z-210331T1400Z/
/O.EXB.KEKA.SC.Y.0040.210331T1400Z-210331T2000Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
616 AM PDT Wed Mar 31 2021

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 7 AM PDT THIS
MORNING...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM PDT THIS AFTERNOON...

* WHAT...For the Hazardous Seas Warning, very steep and 
  hazardous seas 8 to 10 feet. For the Small Craft Advisory, 
  seas 7 to 10 feet expected.

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

* WHEN...For the Hazardous Seas Warning, until 7 AM PDT this 
  morning. For the Small Craft Advisory, until 1 PM PDT this 
  afternoon.

* 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.

&&

$$

PZZ450-311430-
/O.CON.KEKA.SC.Y.0040.000000T0000Z-210331T1400Z/
Pt St George to Cape Mendocino out 10 nm-
616 AM PDT Wed Mar 31 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Seas 6 to 8 feet.

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

* WHEN...Until 7 AM PDT this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PZZ455-311430-
/O.CON.KEKA.SC.Y.0040.000000T0000Z-210331T1400Z/
Cape Mendocino to Pt Arena out 10 nm-
616 AM PDT Wed Mar 31 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT THIS
MORNING...

* WHAT...Seas 4 to 7 feet.

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

* WHEN...Until 7 AM PDT this morning.

* 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
Mar 30, 9:01 PM PDTSmall Craft AdvisoryEKA14 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.