A rain of trout falls from the sky centered on a point you choose within range.  Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw.  A target takes 10d4 bludgeoning damage on a failed save, or half as much damage on a successful one. 

The trout remain indefinitely; until they are removed, a creature entering the spell's area must succeed on a Dexterity (Acrobatics) check against your spell save DC or have the spell's area count as difficult terrain for them, as must any creature that starts its turn in the spell's area. 

This spell cannot be cast anywhere clouds cannot form. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d4 for each slot level above 3rd.