I guess you could say that on a normal day waves are in a 1-3 or 2-5 foot range. I take the Outback on Lake Michigan only when waves are less than 1 foot or glass smooth, which happens in summer when wind direction is out of the SSW.
In 1975, a 729-foot iron ore freighter and its crew of 28 went down on Lake Superior in conditions similar to the ones we are seeing today and tomorrow on Lake Michigan.
Here's a "normal" day for water skiing on Lake Michigan. This evening, will post a picture of the lake's current condition.