* WHAT. High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 8 ft expected. * WHERE. In Illinois, Lake IL, Northern Cook and Central Cook Counties. In Indiana, Lake IN and Porter Counties. * WHEN. Through late tonight. * IMPACTS. Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

* WHAT. North winds to 25 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE. Calumet Harbor IL to Michigan City IN. * WHEN. Until 9 PM CDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. High wave action, strong currents, and dangerous swimming conditions expected. Piers may be heavily swamped by waves. * WHERE. Ottawa, Allegan and Van Buren counties. * WHEN. Through this evening. * IMPACTS. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS. North to northwest winds of 15 to 25 mph will build waves this evening that will persist into Monday. Dangerous waves and currents are expected through this evening. North side of north piers will be dangerous places to swim. The worst conditions will likely occur this afternoon and evening.

* WHAT. North to northwest winds 15 to 25 knots and waves 3 to 6 feet. * WHERE. St Joseph to Grand Haven. * WHEN. Until 11 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.