Cold Snap/Fimbulwinter in a desert

[Ravens_cry]

Note that just because a place is cold doesn't mean that it is necessarily wet - Antarctica has some of the dryest places in the world, after all.

If you went by real-world logic, the circle of cold air would have a lot of warm air trying to move in and fill the low-pressure area, so you get warm winds and stuff - however, in this case I'd be inclined to just stick with whatever the spells say that they do (since such a scenario would eradicate the circle of cold air completely).

You'd probably get tornadoes up the ying yang around the outer edges.