A New Source of Alternative Energy

Consider this...Lots of hurricanes occur each year....find out how many?

Now, the energy expended by an "average"-sized hurricane is equivalent to the energy needs of the United States for a six-month period.

Question: Assuming we could tap and store the energy released by all of the hurricanes that will probably impact or draw near to the U.S. just this one year, for how many years would our energy needs be satisfied?