Summon a fifteen by thirty foot storm. The storm has three affects. On a bonus action, chose 1 to activate.

Hail: All creatures in the storm take ten piercing damage. They must then make a Dexterity saving throw or take 2d10 cold damage

Tornado: A swift gust off circular wind hits up to five creatures in the storm. They must take  4d12 bludgeoning damage and be flung twenty feet backwards.

Lightning: One creature in the storm takes 9d6 lightning damage. You must do one Hail and one Tornado to do one Lightning.