Avalanche

pick five 5 by 5 foot squares. Large bundles of snow appear above the squares that then fall and hit the squares you targeted. If it hits a creature as it falls the creature must make a strength saving throw. On a failed save the creature takes 4d8 bludgeon damage and 4d8 cold damage, or half as much on a successful save. When the snow hits the ground for one minute that square counts as difficult terrain. When a creature ends its turn in the snow it takes an additional 1d4 cold damage. 

At higher levels you can pick an additional square for each spell slot used above 5th level.