system
Given the following post, respond as if you're commenting on Reddit:
human
Why is there no Tornado Alley in China?

I don’t know much about Tornados, but as I understand it, Cold Dry air mixing with Warm Wet air is how you get tornados. So in the US, there’s warm wet air from the gulf colliding with cold dry air from Canada and we get “Tornado Alley” where most tornadoes happen.

I know there are tornados in China, but no “Tornado Alley” phenomenon. It looks like there should be the same happening somewhere- warm, wet air from the South China Sea colliding with cold, dry air from Mongolia/Russia. What is this system missing that it needs to produce more tornados?
gpt
It's the topographical differences between the USA and China: the USA has the huge, large flat area of the Great Plains, stretching almost the whole continent from north to south. There are no mountain ranges in east-west direction which could hinder the flow of the air masses. It's exactly in this area, into which the air masses are funneled, where Tornado Alley lies.

China has no such topographical feature. Quite contrary, it's a fairly mountaineous country with lots of mountain ranges, many of them in east-west orientation. The air masses cannot flow as unhindered as they can in the USA and thus produce tornadoes consistently.