My first thought was--"Now what do I do? The central leader is gone?". I walked up to the tree for a closer look at the damage.
The second thing I noticed was that the bark had become separated from the wood below the break point (red arrow). By looking over the damage carefully, I formulated a plan to help this damaged tree re-develop a central leader.
Since I had to remove so much of the tree to repair the storm damage, I decided to postpone all further pruning until next year. This summer this tree will sprout many new limbs while trying to replace as much of it's lost top as possible. Hopefully, a new central leader will emerge from all the new growth and can begin the tree training process all over again starting next March. I'll keep the 2x4 in place and the branch tied up until the pruning wound on the main trunk heals over.