Just thought I'd make a quick post to share the stormy fall season on the Great Lakes and specifically Lake Michigan. Back on September 28, 2009 we had a major storm come ashore in Grand Haven. The NOAA forecast called for a storm warning with 50kt+ winds and 15-20 foot waves. I don't know the actual wave heights or the wind speeds that day, but I can say that I've never seen more wind or bigger waves on Lake Michigan than I did that day.
Check these videos for a better description than words can provide:
And lastly, 20 degrees of heel in the slip: