DaisyI said:
I think your Maple is dead. You can do a scratch test to make an absolute determination but, it doesn't look promising. A wind storm won't knock the leaves off a healthy tree. There is another reason.
I can see a couple problems: The tree is grafted at the top. Top grafted JM's don't have a good survival rate.
Second, the pot looks small. You didn't state where you live but, the position of the tree looks like it may be in full sun. How were you determining when to water?