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Hazardous Seas Warning

Active

Coastal waters from Florence to Cape Blanco OR out 10 nm; Waters from Florence to Cape Blanco OR from 10 to 60 nm

Status In Progress Started about 1 hour ago
Ends
Issued
Severity Moderate
Urgency Expected
Certainty Likely

Details

* WHAT...South winds 25 to 35 kt with very steep and hazardous seas 14 to 16 ft at 14 seconds. Gale force gusts to 40 kt are possible at times through this morning. South winds ease to 15 to 25 kt this afternoon and swell dominated seas remain steep 12 to 15 ft. Conditions rapidly worsen late Thursday as south winds and seas quickly increase. Gales of 30 to 40 kt with gusts to 50 kt possible. Seas increase due to increasing wind waves and an incoming heavy long period swell, possibly reaching 20 to 25 ft at 15 seconds Friday.
* WHERE...All areas.
* WHEN...For the Hazardous Seas Warning, until 4 PM PST this afternoon. For the Small Craft Advisory, from 4 PM this afternoon to 10 PM PST Thursday. For the Gale Watch, from Thursday evening through Friday evening.
* IMPACTS...Strong winds and very steep seas could capsize or damage vessels. Low visibility conditions are possible.
* ADDITIONAL DETAILS...Very steep, hazardous seas could reach 25 to 30 feet or higher late Friday into Saturday as a heavy long period swell continues to build in. Please stay tuned for updates on this high impact weather pattern.
* View the hazard area in detail at https://go.usa.gov/x6hks

Instructions

Mariners should consider altering plans to avoid strong winds and very steep seas. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions.
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