A storm cloud appears in the shape of a cylinder that is 10 feet tall with a 60-foot radius, centered on a point you can see within range directly above you.
When you cast the spell, choose a point you can see under the cloud. A clash of Thunder Explodes from the cloud at that point. Each creature within 5 feet of that point must make a Dexterity saving throw. A creature takes 3d10 Thunder damage on a failed save, or half as much damage on a successful one. On each of your turns until the spell ends, you can use your action to call Thunder in this way again, targeting the same point or a different one.
At Higher Levels. When you cast this spell using a spell slot of 4th or higher level, the damage increases by 1d10 for each slot level above 3rd.