1 Samuel 12:16-17
16-17"Pay attention! Watch this wonder that God is going to perform before you now! It's summer, as you well know, and the rainy season is over. But I'm going to pray to God. He'll send thunder and rain, a sign to convince you of the great wrong you have done to God by asking for a king."
18Samuel prayed to God, and God sent thunder and rain that same day. The people were greatly afraid and in awe of God and of Samuel.