Thunder

When you cast the spell, choose a creature you can see. A bolt of lightning flashes down to that creature. Make a ranged spell attack against the target. On a hit, the target takes 1d6 lightning damage.

If you are outdoors in stormy conditions when you cast this spell, the spell gives you control over the existing storm instead of creating a new one. Under such conditions, the spell's damage increases by 3d10.

At Higher Levels. When you cast this spell it does 1d6 increased damage every 6 levels.