* WHAT...South winds 20 to 30 kt with gusts up to 40 kt and waves 7 to 12 ft possible. * WHERE...Northern Two Thirds of the Open Waters of Lake Michigan, Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake, Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake, Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake, and Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake. * WHEN...From Monday evening through Tuesday afternoon. * 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.