* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and waves 6 to 11 ft possible becoming west winds 20 to 30 kts with gusts up to 50 kts and waves 9 to 13 feet possible, highest winds and waves near the Keweenaw Peninsula. * WHERE...Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park, Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border, Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore, Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore and Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border. * WHEN...From Monday evening through Tuesday evening. * IMPACTS...Strong winds can cause hazardous waves which could capsize or damage vessels and reduce visibility. 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 waves.