A better way to test a tent for wind loading is much more controlled. You get a pickup truck with an open bed on it, and you cover the bed with a couple of sheets of plywood. Then you anchor your tent onto the plywood... very thoroughly. You drive the truck down the road at 10 mph, then 20 mph, then 30 mph, etc. In the event that the tent departs from the plywood, you can just pick it up off the side of the road and hope it isn't damaged too much.
With a tropical storm or a hurricane, you really don't have any way of knowing what kind of wind speeds are hitting your specific location.