Wind blowing at 20 miles per hour has a force of 1¼ lbs.
Wind blowing at 35 miles per hour has a force of 6 lbs.
Wind blowing at 50 miles per hour has a force of 13 lbs.
Wind blowing at 75 miles per hour has a force of 28 lbs.
Wind blowing at 90 miles per hour has a force of 40 lbs.