A storm in a dream usually mirrors emotional turmoil that's been building somewhere in your life -- tension you can feel coming but haven't addressed directly. Whether the storm is frightening or oddly exhilarating in the dream often reflects whether you feel ready to face what's building, or still bracing against it.
Conjunction of celestial bodies is a great support that we have to take advantage of. - Picatrix (Andalusia, ~1000.AD)