I purchased a Weber Spirit 2 gas grill with cover and accessories.  I have the grill on a deck at the beach. I thought the cover was strapped down, works better if keep side trays extended.  It flew off a week after purchase.  After the first incident I secured it with furniture around the grill when not at home.  That seemed to work until last week. It blew off again and this time not to be found.  Hoping to find a better option.