Intreat the LORD (for it is enough) that there be no more mighty thunderings and hail; and I will let you go, and ye shall stay no longer. It is enough - There is no need of any farther plague; I submit to the authority of Jehovah and will rebel no more.
Mighty thunderings - כלת אלהים koloth Elohim, voices of God; - that is, superlatively loud thunder. So mountains of God (Psalms 36:6) means exceeding high mountains. So a prince of God (Genesis 23:6) means a mighty prince. See a description of thunder, Psalms 29:3-8 : "The Voice Of The Lord is upon the waters: the God of glory thundereth; the Lord is upon many waters. The voice of the Lord is powerful; the voice of the Lord is full of majesty. The voice of the Lord breaketh the cedars. The voice of the Lord divideth the flames of fire. The voice of the Lord shaketh the wilderness," etc. The production of rain by the electric spark is alluded to in a very beautiful manner, Jeremiah 10:13 : When he uttereth his voice, there is a multitude of waters in the heavens. See Clarke's note on Genesis 7:11, and Genesis 8:1 (note).