Aye. Jesus said that the Father ordains the fall of every sparrow (i.e. everything, including the trivial). On another occasion he compares us to clay and God to the potter. What right does the lump have to determine how it is shaped? On its own it can do nothing. The absolute soverignty of God in His creation troubles some and comforts others. For some reason we no longer understand that it is not events that are evil, but rather it is the heart of man. A tornado (or a cancer, or a tsunami, or a heart attack) is a tool of God to accomplish His purposes. It is our choice how to react to them, to sin or to remain righteous.
Yes, God decides what He wants to do with His creations. But people forget that Satan has power too. God allowed Job’s misery. He didn’t command it.
There’s a difference between God allowing Satan to use his power against God’s creation and God using His power on His creation. One is God giving His consent and not taking action. The other is God directly taking action.
A tornado could be either one, IMO.