Very high winds will shut it down but mostly they use a variable speed limit according to wind speeds. The last time I crossed it wind speeds were about 25mph at ground level and the speed limit for trucks was 35mph. 300 feet above the surface winds are considerably stronger.
I bet there are times when the wind gets screaming in that location.
A woman in a small car got blown off the Mackinaw Bridge. I think it was in the 90s.