A Sea-like Lake
In the middle of summer you may go sailing on the lake and find that there is no, or very little wind. On such days you may spend long periods of time hoping for the wind to pick up and get from point A to point B.
https://youtu.be/rSb-8HC9KAQ
On other days the lake looks like in the footage above. After two days of constant wind the lake has been churned up and the waves are nice and large.