Wind will do bad things to a car cover unless it's a brand new, top of the line, like gold series from BD. My experience is only about 30 mph wind speed in a winter storm. 65 mph is almost hurricane force, although it would be a little less from being behind the towing vehicle.
I guestimate a good cover would last about a hundred miles at highway speed if it was carefully attached, maybe more. My current 4 year old cover would be ripped to shreds in about five minutes.
Bookmarks