How strong would the winds have to be to pick up my 10ft aluminum boat? Should I turn it right side up or leave it upside down?

I have an aluminum boat in my backyard similar to this one. but mine is on the ground. Irene may hit here a Category 2. Are those winds strong enough to pick the boat up? I don’t know how much it weighs. Should I turn it right side up? It seems like it would be more likely to go airborne if the winds get under it. Is that right?