Let's take the most famous scene from Frozen where Elsa creates her ice palace up in the freezing mountains. Now imagine Elsa doing the same thing at sea level, in the summer, where the conditions are approximately SATP (i.e. 25°C and 100 kPa). Assume that the scientific basis of her power is the ability to locally alter temperature to the point of water vapor depositing as ice. My questions are: Are there any consequences (other than the ice generation itself) of converting that much water vapor in the atmosphere to ice? For example, will that cause a huge change in air pressure? Also, exactly how might these effects be altered by Elsa's location (and thus thermodynamic conditions around her)?
EDIT: I am aware that it would take an enormous measure of air to generate a substantial amount of ice. Assume that Elsa has the ability to gather that amount of air—what would then be the atmospheric or thermodynamic consequences?