* WHAT. North winds to 30 kt and significant waves to 8 ft occasionally to 10 ft expected. * WHERE. Illinois and Indiana nearshore from Winthrop Harbor IL to Michigan City IN. * WHEN. From midnight tonight to 4 AM CDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 8 ft expected. * WHERE. In Illinois, Lake, Northern Cook and Central Cook Counties. In Indiana, Lake and Porter Counties. * WHEN. From midnight CDT tonight through late Sunday night. * 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 10 to 20 knots with gusts up to 30 knots and waves 4 to 7 feet expected. * WHERE. St Joseph to Manistee. * WHEN. From 10 PM this evening to 10 PM EDT Sunday. * 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. Mason, Oceana, Muskegon, Ottawa, Allegan and Van Buren counties. * WHEN. From 10 PM EDT this evening through Sunday evening. * IMPACTS. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS. Northwest winds will make beaches on the north sides of north piers particularly dangerous.