'Thunder' in the Bible

Moses stretched out his staff toward the sky, and the Lord sent thunder and hail, and lightning (fireballs) ran down to the earth and along the ground. And the Lord rained hail on the land of Egypt.

Moses said to him, “As soon as I leave the city, I will stretch out my hands to the Lord; the thunder will cease and there will be no more hail, so that you may know [without any doubt] and acknowledge that the earth is the Lord’s.

So Moses left the city and Pharaoh, and stretched out his hands to the Lord; then the thunder and hail ceased, and rain no longer poured on the earth.

But when Pharaoh saw that the rain and the hail and the thunder had ceased, he sinned again and hardened his heart, both he and his servants.