Hello,
Just an outside opinion from your lurking wandering Jew...
This seems to be a question more of God's omnibenevolence than his omnipotence? How do we know exactly what God's plan is when he sends a raging storm? Could He be trying to show us than he is capable of terrorizing us or is truely punishing us? Is He driving us to a message that he wants us to learn. In Judaism, there is no concept of omnibenevolence as understood by Christians in that God did create evil (He said so) but that his purpose in doing so is to give us free will. In otherwords, He did not create evil for evil's sake but for the ability to choose between Him (good) and not Him (evil). Acts of the planet are set in motion by Him and He has a plan for all of us, even if we don't understand it, question it or like it. We have to trust that it is for a greater plan.
I hope to hear your responses. I enjoy reading your points of view and this is a toughy for any faith!