* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected.
* WHERE...In Illinois, Northern Cook and Central Cook Counties. In Indiana, Lake County.
* WHEN...From late tonight through Sunday evening.
* IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.