* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 7 to 10 ft expected.
* WHERE...Lake IL, Northern Cook, and Central Cook Counties.
* WHEN...From 3 AM CDT Saturday through Monday morning.
* IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.