* WHAT...Life threatening waves of 4 to 8 feet today and tonight, building to 8 to 12 feet Sunday and Sunday night, and 4 to 8 feet Monday into Tuesday evening. Dangerous currents are expected through this period. * WHERE...Sheboygan, Ozaukee, Milwaukee, Racine and Kenosha Counties. * WHEN...Through Tuesday evening. * IMPACTS...Dangerous swimming conditions are expected due to high waves and onshore winds. Stay out of the water and away from dangerous areas like piers and breakwalls. Strong structural and longshore currents are expected. Rip currents are possible.