How windy was it?

Everyone in the Upper Midwest has been talking about the "land hurricane" that has swept the area for the past several days.  I won't repeat any of the stories, which you have either heard or don't care about.  But I thought the graphic of wave height on Lake Superior, from NOAA, is interesting.  The winds today are coming from the south and west, so with that long fetch over the lake, the red and purple colors near the Canadian side indicate waves 20-25' high!  (I presume these data reflect computer modelling rather than actual measurements since the timestamp is later today).

I read in one comment thread that every ore boat has been pulled off the lake into harbor to prevent another incident like the Edmund Fitzgerald (Gordon Lightfoot song in an excellent video at the link).