Psalms 18:12 - Exposition

At the brightness that was before him his thick clouds passed. The "brightness" intended is probably that of lightning. The "thick clouds" are riven and parted asunder for the lightning to burst forth. Then come, almost simultaneously, hail stones and coals of fire; i.e; hail like that which fell in Egypt before the Exodus ( Exodus 9:22-34 ), when "there was hail, and fire mingled with the hail" ( Psalms 18:24 )—a fire which "ran along upon the ground," or some very unusual electrical phenomenon.