* 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...Until noon EDT today.
* IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers.
* ADDITIONAL DETAILS...Westerly winds of 15 to 25 mph will build waves this morning into the 3 to 6 foot range. Dangerous waves and currents are expected this morning, especially early. By noon, conditions should improve.