Charles Ellicott Commentary Exodus 9:33

"And Moses went out of the city from Pharaoh, and spread abroad his hands unto Jehovah: and the thunders and hail ceased, and the rain was not poured upon the earth." — Exodus 9:33 (ASV)

Moses went out of the city ... and spread abroad his hands.

Moses did not fear the storm. Though it still raged, he left the shelter of the city and went out into the midst of it. He spread out his hands to God, and behold, immediately the rain, hail, and thunder ceased at his bidding. Soon, there was a great calm.

As Millington observes: “Moses knew that he was safe, though all around might be destroyed. The very hairs of his head were all numbered; not one of them could perish. Standing there under the tempestuous canopy of heaven, bareheaded, in the attitude of prayer, he spread abroad his hands to the Lord, and the thunder and hail ceased, and the rain was not poured upon the earth” (Plagues of Egypt, p. 135).