system
Given the following post, respond as if you're commenting on Reddit:
human
Do polar vortexes also happen in the southern hemisphere?

The polar vortex in North America is getting a lot of attention, but does it happen in the southern hemisphere as well?  If not, why?
gpt
The antarctic polar vortex is stronger and much more stable than the arctic polar vortex. The polar vortex is a normal thing btw. that is always there. But since the arctic polar vortex is less stable it can move more and reach latitudes it normally wouldn't reach.