If God is Omnipotent, Omnipresent and Omniscient then surely he is above all these traits that he seemingly attributes to himself?
Are these 'emotions' just metaphors to give humans an idea of what he is otherwise how would he communicate with us, but since anger is a trait of signifying weakness, what does it say about his inherent nature?
It's called anthropomorphism. Expression through emotion is not the same thing as being driven by emotions. The more you learn to guide them / experience them appropriately, rather than be guided by them, the more it starts making sense. All of that said, our emotions are grounded in our flesh nature - not so with God - so there's no 1:1 comparison that we can relate to.