I think this is a really good breakdown of how the areas outside of the highest elevations would be relatively hindered. We'd need a system that bombs and stalls at just the right spot to pull in cold air from a fresh, frigid airmass to our north (this happens in our long-duration monsters). Even then, the storm would eventually occlude unless there were some sort of moisture and energy fetch from the tropics to keep it going. The likelihood of these two things happening in tandem is incredibly low, though I *suppose* it's possible.