WWA Summary for Hazardous Seas Warning

Hazardous Seas Warning

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1111 AM PDT Thu Sep 18 2025

PZZ450-190215-
/O.CON.KEKA.SE.W.0030.000000T0000Z-250919T1000Z/
Pt St George to Cape Mendocino out 10 nm-
1111 AM PDT Thu Sep 18 2025

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 3 AM PDT
FRIDAY...

* WHAT...Very steep and hazardous seas 8 to 12 feet.

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

* WHEN...Until 3 AM PDT Friday.

* 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.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
1111 AM PDT Thu Sep 18 2025

PZZ475-190215-
/O.CON.KEKA.GL.W.0041.000000T0000Z-250918T2200Z/
/O.EXB.KEKA.SE.W.0030.250918T2200Z-250919T1000Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
1111 AM PDT Thu Sep 18 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM PDT THIS AFTERNOON...
...HAZARDOUS SEAS WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO
3 AM PDT FRIDAY...

* 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 11 to 15 feet
  expected.

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

* WHEN...For the Gale Warning, until 3 PM PDT this afternoon.
  For the Hazardous Seas Warning, from 3 PM this afternoon to 3
  AM PDT Friday.

* 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.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service Medford OR
557 AM PDT Thu Sep 18 2025

PZZ370-190000-
/O.CON.KMFR.SE.W.0034.000000T0000Z-250919T1800Z/
/O.CON.KMFR.SC.Y.0076.000000T0000Z-250919T1800Z/
Waters from Florence to Cape Blanco OR from 10 to 60 nm-
557 AM PDT Thu Sep 18 2025

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 11 AM PDT
FRIDAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 AM PDT
FRIDAY...

* WHAT...For the Small Craft Advisory, north winds 20 to 30 kt
  with gusts up to 35 kt and steep seas 7 to 10 ft. For the
  Hazardous Seas Warning, very steep and hazardous seas 8 to 11
  ft.

* WHERE...For the small craft advisory, all areas until 11 PM
  Wednesday, then around 20 nm offshore from Cape Blanco and out
  to 60 nm from Coos Bay. For the Hazardous Seas Watch,
  everywhere else.

* WHEN...For the Small Craft Advisory, from 5 PM this afternoon
  to 11 AM PDT Friday. For the Hazardous Seas Warning, from 11
  PM this evening to 11 AM PDT Friday.

* IMPACTS...Very steep and hazardous seas could capsize or
  damage vessels. Bar crossings will become especially
  treacherous.

* View the hazard area in detail at https://go.usa.gov/x6hks

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for very steep seas and consider remaining in port
until conditions improve.

&&

$$