Hearing thunder in a dream can warn of a potential emotional outburst.
If the thunder is in the distance, there may still be time to regain control of a difficult situation. Spiritually, the rumblings of thunder can demonstrate deep anger.
Because lightning has long been considered the prerogative of the gods and a symbol of communication between the world of gods and that of human beings, if lightning appears in your dream or you are struck by a thunderbolt, this suggests intuition, inspiration and the sudden awakening of psychic powers. In general, lightning in a dream indicates unexpected changes that are taking place, or are about to take place. These changes may be to your routine or to the way you think.
Lightning can also indicate strong, passionate love that can strike suddenly and unexpectedly. Alternatively, lightning in a dream can indicate a discharge of tension, or a necessary but destructive act on your part in order to make progress. Spiritually, lightning can denote sudden enlightenment or personal growth.
If a storm—with or without thunder and lightning—appears in your dream, this indicates personal emotional outbursts as the storm allows the dreamer to release emotion and clear the air. But if the storm is approaching, this indicates a sense of difficult times ahead, and of anger or passion about someone or something that has built up, but which has not yet been expressed.
[1]