* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas 8 to 12 feet expected.
* WHERE...Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM.
* WHEN...From 8 AM Thursday to 2 PM EDT Friday.
* IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.